2023 Vol. 44 Issue 2
2023 Vol. 44, No. 2 Catalogue
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2023, 44(2): 1-7.
doi: 10.12172/202211280001
Abstract:
Shrub encroachment is an universal phenomenon, which has become a global problem, and a hot issue in the study of global change ecology, grassland ecology, phenology, tourism and animal husbandry. It is defined as the increase of woody biomass, density and coverage, but the decrease of herbaceous biomass, density and coverage in grassland ecosystems. Shrub encroachment is the result of the interaction of overgrazing, fire and climate change. The shrub encroachment causes the change of grassland land patterns and biological patterns, which results in the fertile island effect, the change of grassland biodiversity and grassland productivity. In the future research, more work should be emphasized on the mechanisms of shrub encroachment, influences on the aboveground and belowground parts of grassland-shrub ecosystems and management approach of shrub encroachment, which is of great significance to the grassland production areas in China.
Shrub encroachment is an universal phenomenon, which has become a global problem, and a hot issue in the study of global change ecology, grassland ecology, phenology, tourism and animal husbandry. It is defined as the increase of woody biomass, density and coverage, but the decrease of herbaceous biomass, density and coverage in grassland ecosystems. Shrub encroachment is the result of the interaction of overgrazing, fire and climate change. The shrub encroachment causes the change of grassland land patterns and biological patterns, which results in the fertile island effect, the change of grassland biodiversity and grassland productivity. In the future research, more work should be emphasized on the mechanisms of shrub encroachment, influences on the aboveground and belowground parts of grassland-shrub ecosystems and management approach of shrub encroachment, which is of great significance to the grassland production areas in China.
2023, 44(2): 8-12.
doi: 10.12172/202205270002
Abstract:
Bergenia purpuracens is a perennial herb species in the genus Bergenia (Saxifragaceae). At present, there are many studies on this species, mainly focusing on the chemical constituents and pharmacology. In this paper, the chemical constituents and utilization value of Bergenia purpuracens were summarized by consulting, sorting and summarizing the relevant literatures of Bergenia purpuracens at home and abroad, which lays a theoretical foundation for the later research of Bergenia purpuracens and provides reference for the later experimental research.erimental research.
Bergenia purpuracens is a perennial herb species in the genus Bergenia (Saxifragaceae). At present, there are many studies on this species, mainly focusing on the chemical constituents and pharmacology. In this paper, the chemical constituents and utilization value of Bergenia purpuracens were summarized by consulting, sorting and summarizing the relevant literatures of Bergenia purpuracens at home and abroad, which lays a theoretical foundation for the later research of Bergenia purpuracens and provides reference for the later experimental research.erimental research.
2023, 44(2): 13-20.
doi: 10.12172/202206140001
Abstract:
The Eurasian wild boar is a well-known scientific name of wild boar, and its environmental adaptability is extremely strong, ranging from temperate zone to tropical zone, from semi-arid climate to tropical rain forest. In recent years, due to the continuous expansion of wild boars in Sichuan province, which has gradually affected the ecological balance and human activities. Coupled with the severe situation of prevention and control of the epidemic of African Swine Fever (ASF), relevant departments and scholars pay more and more attention to the wild boars. In order to find out the distribution and activities of wild boars in Xiaozhaizigou Nature Reserve, and provide support for the prevention of ASF and the regulation of wild boars population, the habitat suitability and selection characteristics of wild boars in Xiaozhaizigou Nature Reserve were analyzed and evaluated by means of Line Transect Method. The results showed that the MaxEnt model performed well (the average AUC = 0.918) and could be used for habitat evaluation. The suitable and sub-suitable habitat area was 81.76 km2, accounting for 18.42% of the whole nature reserve, and the unsuitable and less-suitable habitat area accounted for 57.57% and 24.00% respectively. The elevation and soil type were both important environmental variables. Most of the wild boar trails in Xiaozhaizigou Nature Reserve appeared in the dark-brown earth area, and the main activity zones were concentrated between 1500 m and 2500 m, accounting for 74.20% of the total activity trails. The main reason is that wild boars preferred to active in areas with abundant food sources. In addition, the environmental variables such as climate, geography, biology, human disturbance and other environmental variables in this study were also important factors affecting the food distribution of wild boars.bundant food sources. In addition, the environmental variables such as climate, geography, biology, human disturbance and other environmental variables in this study were also important factors affecting the food distribution of wild boars.
The Eurasian wild boar is a well-known scientific name of wild boar, and its environmental adaptability is extremely strong, ranging from temperate zone to tropical zone, from semi-arid climate to tropical rain forest. In recent years, due to the continuous expansion of wild boars in Sichuan province, which has gradually affected the ecological balance and human activities. Coupled with the severe situation of prevention and control of the epidemic of African Swine Fever (ASF), relevant departments and scholars pay more and more attention to the wild boars. In order to find out the distribution and activities of wild boars in Xiaozhaizigou Nature Reserve, and provide support for the prevention of ASF and the regulation of wild boars population, the habitat suitability and selection characteristics of wild boars in Xiaozhaizigou Nature Reserve were analyzed and evaluated by means of Line Transect Method. The results showed that the MaxEnt model performed well (the average AUC = 0.918) and could be used for habitat evaluation. The suitable and sub-suitable habitat area was 81.76 km2, accounting for 18.42% of the whole nature reserve, and the unsuitable and less-suitable habitat area accounted for 57.57% and 24.00% respectively. The elevation and soil type were both important environmental variables. Most of the wild boar trails in Xiaozhaizigou Nature Reserve appeared in the dark-brown earth area, and the main activity zones were concentrated between 1500 m and 2500 m, accounting for 74.20% of the total activity trails. The main reason is that wild boars preferred to active in areas with abundant food sources. In addition, the environmental variables such as climate, geography, biology, human disturbance and other environmental variables in this study were also important factors affecting the food distribution of wild boars.bundant food sources. In addition, the environmental variables such as climate, geography, biology, human disturbance and other environmental variables in this study were also important factors affecting the food distribution of wild boars.
2023, 44(2): 21-30.
doi: 10.12172/202206150001
Abstract:
Based on the remote sensing images and land use data of Qionglai Mountain-Daxiangling area in Giant Panda National Park from 1995 to 2018, the landscape pattern status and fragmentation degree of each period in the study area were comparatively analyzed by using morphological spatial pattern analysis, transition matrix and dynamic degree model, landscape pattern index and other methods. The results showed that: (1) The structural elements of GI network in the study area were mainly the core area, and other elements were scattered; (2) The woodland and grassland accounted for more than 96% of the total area, which were the two dominant landscape types in the study area. Except for the overall reduction of grassland and unused land, the area of other landscape types had generally increased. (3) The shift of landscape types in different periods mainly occurred between woodland, grassland and cultivated land, and the dynamic change of construction land was the largest from 2007 to 2013. (4) According to the results of the landscape pattern index, at the patch type level, the fragmentation degree of the six major landscape types increased, and the dominance of woodland and grassland were decreased. On the landscape level, the fragmentation, diversity and shape complexity of the landscape in the study area was generally increased, while the degree of spread and aggregation were generally reduced and the overall connectivity was poor. Finally, aiming at the above problems, some suggestions on landscape pattern optimization were put forward. The research can provide data support and theoretical reference for the ecological environmental protection and management of the Qionglai Mountain-Daxiangling area of the Giant Panda National Park.
Based on the remote sensing images and land use data of Qionglai Mountain-Daxiangling area in Giant Panda National Park from 1995 to 2018, the landscape pattern status and fragmentation degree of each period in the study area were comparatively analyzed by using morphological spatial pattern analysis, transition matrix and dynamic degree model, landscape pattern index and other methods. The results showed that: (1) The structural elements of GI network in the study area were mainly the core area, and other elements were scattered; (2) The woodland and grassland accounted for more than 96% of the total area, which were the two dominant landscape types in the study area. Except for the overall reduction of grassland and unused land, the area of other landscape types had generally increased. (3) The shift of landscape types in different periods mainly occurred between woodland, grassland and cultivated land, and the dynamic change of construction land was the largest from 2007 to 2013. (4) According to the results of the landscape pattern index, at the patch type level, the fragmentation degree of the six major landscape types increased, and the dominance of woodland and grassland were decreased. On the landscape level, the fragmentation, diversity and shape complexity of the landscape in the study area was generally increased, while the degree of spread and aggregation were generally reduced and the overall connectivity was poor. Finally, aiming at the above problems, some suggestions on landscape pattern optimization were put forward. The research can provide data support and theoretical reference for the ecological environmental protection and management of the Qionglai Mountain-Daxiangling area of the Giant Panda National Park.
2023, 44(2): 31-37.
doi: 10.12172/202302230001
Abstract:
In conjunction with increasing levels of atmospheric CO2, anthropogenic land-use change and pollution, plant invasion is a key driver of ongoing global change and a major threat to biodiversity. Bidens alba （formerly B. pilosa L.） is an invasive plant species mainly occurring in the subtropics and tropics; this species is recorded to have an extensive range in central and southern China. In this study, sampling was undertaken along a 5 km of coastline in south Guangdong, China, in October 2018. Quantitative methods such as interspecific association coefficient, Godron M method and niche width, community stability among species in B. alba invasive communities were investigated, to assess the extent of B. alba damage to the coastal zone of Guangdong province. As a result, a total 113 species of plants, belonging to 41 families and 95 genera plants were observed in the plots of B.alba communities. The\begin{document}$ {\mathbf{\chi }}^{2} $\end{document} ![]()
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In conjunction with increasing levels of atmospheric CO2, anthropogenic land-use change and pollution, plant invasion is a key driver of ongoing global change and a major threat to biodiversity. Bidens alba （formerly B. pilosa L.） is an invasive plant species mainly occurring in the subtropics and tropics; this species is recorded to have an extensive range in central and southern China. In this study, sampling was undertaken along a 5 km of coastline in south Guangdong, China, in October 2018. Quantitative methods such as interspecific association coefficient, Godron M method and niche width, community stability among species in B. alba invasive communities were investigated, to assess the extent of B. alba damage to the coastal zone of Guangdong province. As a result, a total 113 species of plants, belonging to 41 families and 95 genera plants were observed in the plots of B.alba communities. The
2023, 44(2): 38-43.
doi: 10.12172/202205240001
Abstract:
Monochamus alternatus is one of the main vector insects transmitted by Bursaphelenchus xylophilus. In order to control the transmission of pine wood nematode disease more effectively, the virulence of 6 strains of Beauveria bassiana from different sources to Monochamus alternatus was compared, and the strains with the best pathogenicity were selected and mixed with 3 kinds of polymer materials to prepare microcapsules. The adhesion of different microcapsules on the body surface of scleroderma sichuanensis and the indoor infection effect on Monochamus alternatus were compared, and the Beauveria bassiana microcapsules with the best infection effect were applied to the forest control experiment. The results showed that strain B2 isolated from the susceptible body of Monochamus alternatus was superior to other strains in growth characters and pathogenicity to Monochamus alternatus. The surface adhesion rate of sodium alginate microcapsule to scleroderma sichuanensis was 63%, and the infection rate of Monochamus alternatus was 60% in laboratory test. This study proved the feasibility of using natural enemy insects to carry pathogenic fungi microcapsules to control stem borers.rol stem borers.
Monochamus alternatus is one of the main vector insects transmitted by Bursaphelenchus xylophilus. In order to control the transmission of pine wood nematode disease more effectively, the virulence of 6 strains of Beauveria bassiana from different sources to Monochamus alternatus was compared, and the strains with the best pathogenicity were selected and mixed with 3 kinds of polymer materials to prepare microcapsules. The adhesion of different microcapsules on the body surface of scleroderma sichuanensis and the indoor infection effect on Monochamus alternatus were compared, and the Beauveria bassiana microcapsules with the best infection effect were applied to the forest control experiment. The results showed that strain B2 isolated from the susceptible body of Monochamus alternatus was superior to other strains in growth characters and pathogenicity to Monochamus alternatus. The surface adhesion rate of sodium alginate microcapsule to scleroderma sichuanensis was 63%, and the infection rate of Monochamus alternatus was 60% in laboratory test. This study proved the feasibility of using natural enemy insects to carry pathogenic fungi microcapsules to control stem borers.rol stem borers.
2023, 44(2): 44-50.
doi: 10.12172/202209030001
Abstract:
Due to the impact of human activities, the habitat of species is rapidly lost and fragmented. Giant panda is the flagship species of biodiversity protection, which is seriously threatened by human interference. According to the fourth national giant panda survey results, grazing has become the most serious human disturbance factor in the giant panda habitat lost. In recent years, exploring the internal mechanism and scientific control measures of grazing on the habitat has also become a hot spot in the ecological research of giant pandas. This project was conducted from April to June 2022 in Meigu Dafengding National Nature Reserve, in the most severely grazed area, and the method of field investigation and microbial analysis was adopted to accurately assess the impact of grazing livestock on the soil quality of giant panda's staple food bamboo and forest habitat. The results showed that the height and diameter of bamboo in the quadrat used by livestock were lower than those in the quadrat used by giant pandas, and the number of dead bamboo was higher. Grazing increased the bulk density and pH of the soil under the forest, and reduced the soil moisture content, which may be one of the reasons for the death of bamboo. The research results are helpful to formulate reasonable protection and management strategies and provide scientific basis for solving the serious grazing problems in the giant panda habitat.oblems in the giant panda habitat.
Due to the impact of human activities, the habitat of species is rapidly lost and fragmented. Giant panda is the flagship species of biodiversity protection, which is seriously threatened by human interference. According to the fourth national giant panda survey results, grazing has become the most serious human disturbance factor in the giant panda habitat lost. In recent years, exploring the internal mechanism and scientific control measures of grazing on the habitat has also become a hot spot in the ecological research of giant pandas. This project was conducted from April to June 2022 in Meigu Dafengding National Nature Reserve, in the most severely grazed area, and the method of field investigation and microbial analysis was adopted to accurately assess the impact of grazing livestock on the soil quality of giant panda's staple food bamboo and forest habitat. The results showed that the height and diameter of bamboo in the quadrat used by livestock were lower than those in the quadrat used by giant pandas, and the number of dead bamboo was higher. Grazing increased the bulk density and pH of the soil under the forest, and reduced the soil moisture content, which may be one of the reasons for the death of bamboo. The research results are helpful to formulate reasonable protection and management strategies and provide scientific basis for solving the serious grazing problems in the giant panda habitat.oblems in the giant panda habitat.
2023, 44(2): 51-57.
doi: 10.12172/202211090003
Abstract:
Habitat selection is an important research field in conservation biology, and its research results play a significant role in promoting conservation management. Wild training and release of animals is an important way to rejuvenate small populations, which can effectively improve the genetic diversity of small populations and reduce the risk of extinction. In this study, based on the project of wild and release of Moschus berezovskii in Liziping National Nature Reserve, Fisher's precision probability test, Shapiro-Wilke test, Mann-Whitney U test and principal component analysis (Principal Component Analysis, PCA) were used to compare and analyze the difference between habitat selection between wild period and released period. The result showed that there were significant differences in the selection of altitude, water distance, tree height and shrub height of Moschus berezovskii, which indicated the selections of the altitude was lower (1,892.00+29.87 m), the water distance was longer (72.39+5.73 m), the tree layer height and the shrub layer height were lower than before (18.24+2.39 m 2.40+0.22 m). However, there was no obvious difference in the selections of slope direction, slope position, slope gradient, arbor DBH, arbor canopy and shrub canopy (P > 0.05). The results of principal component analysis showed that the first three principal components accounted for 71.91% of the data differences. Altitude factor (consist of arbor DBH, altitude and shrub height), heat factor (consist of water distance, tree canopy) and topography factor (consist of slope position) were the essential factors affecting the habitat selection of Moschus berezovskii during the release period. This research reported for the first time that captive Moschus berezovskii showed different habitat selections after wild training and released into the natural world. The results provided a scientific reference for improving and assisting wild training of Moschus berezovskii.
Habitat selection is an important research field in conservation biology, and its research results play a significant role in promoting conservation management. Wild training and release of animals is an important way to rejuvenate small populations, which can effectively improve the genetic diversity of small populations and reduce the risk of extinction. In this study, based on the project of wild and release of Moschus berezovskii in Liziping National Nature Reserve, Fisher's precision probability test, Shapiro-Wilke test, Mann-Whitney U test and principal component analysis (Principal Component Analysis, PCA) were used to compare and analyze the difference between habitat selection between wild period and released period. The result showed that there were significant differences in the selection of altitude, water distance, tree height and shrub height of Moschus berezovskii, which indicated the selections of the altitude was lower (1,892.00+29.87 m), the water distance was longer (72.39+5.73 m), the tree layer height and the shrub layer height were lower than before (18.24+2.39 m 2.40+0.22 m). However, there was no obvious difference in the selections of slope direction, slope position, slope gradient, arbor DBH, arbor canopy and shrub canopy (P > 0.05). The results of principal component analysis showed that the first three principal components accounted for 71.91% of the data differences. Altitude factor (consist of arbor DBH, altitude and shrub height), heat factor (consist of water distance, tree canopy) and topography factor (consist of slope position) were the essential factors affecting the habitat selection of Moschus berezovskii during the release period. This research reported for the first time that captive Moschus berezovskii showed different habitat selections after wild training and released into the natural world. The results provided a scientific reference for improving and assisting wild training of Moschus berezovskii.
2023, 44(2): 58-63.
doi: 10.12172/202211160001
Abstract:
Delineating the geographical boundaries of intraspecific units is important for effective conservation management. Using the habitat suitability index (HSI) map of giant panda (Ailuropoda melanoleuca) in the Daxiangling Mountains and its surrounding areas, we delineated the intraspecific units for pandas in this region with R package “habCluster”. The results showed that the Daxiangling Mountains was divided into 20 giant panda intraspecific units. These boundary delineations from our results show good performance in detecting areas that are separated by raster cells with low HSI values, thus could serve as good indicator of giant panda habitat patches. The overlap analysis with nature reserves suggested that the Daxiangling Nature Reserve was divided into 3 intraspecific units, the Wawushan Nature Reserve into 4 units, and the Yangziling Nature Reserve into 2 units. For the trans-Daxiangling-Wawushan intraspecific unit, coordinated conservation efforts is needed among the departments of different administrative regions in order to strengthen the protection and management of its wild population. While for the Niba Mountain intraspecific unit, it is indispensable to reduce the negative impacts of the highway that across it, so as to avoid its habitat from further fragmentation. Our study provided a new perspective for the conservation implementation of the giant pandas in the Daxiangling Mountains, and can be applied to wildlife conservation in other regions.
Delineating the geographical boundaries of intraspecific units is important for effective conservation management. Using the habitat suitability index (HSI) map of giant panda (Ailuropoda melanoleuca) in the Daxiangling Mountains and its surrounding areas, we delineated the intraspecific units for pandas in this region with R package “habCluster”. The results showed that the Daxiangling Mountains was divided into 20 giant panda intraspecific units. These boundary delineations from our results show good performance in detecting areas that are separated by raster cells with low HSI values, thus could serve as good indicator of giant panda habitat patches. The overlap analysis with nature reserves suggested that the Daxiangling Nature Reserve was divided into 3 intraspecific units, the Wawushan Nature Reserve into 4 units, and the Yangziling Nature Reserve into 2 units. For the trans-Daxiangling-Wawushan intraspecific unit, coordinated conservation efforts is needed among the departments of different administrative regions in order to strengthen the protection and management of its wild population. While for the Niba Mountain intraspecific unit, it is indispensable to reduce the negative impacts of the highway that across it, so as to avoid its habitat from further fragmentation. Our study provided a new perspective for the conservation implementation of the giant pandas in the Daxiangling Mountains, and can be applied to wildlife conservation in other regions.
2023, 44(2): 64-72.
doi: 10.12172/202206010004
Abstract:
From October 2021 to May 2022, the pheasant species in Deyang area of Giant Panda National Park were investigated by the methods of transect survey, trace survey, visit survey and infrared camera technology. Meanwhile, the monitoring data of infrared camera in this area since 2017 were collected and analyzed comprehensively. A total of 11 pheasant species were recorded, among which, Chinese Monal (Lophophorus lhuysii) and Chestnut-throated Partridge (Tetraophasis obscurus) were national class I key protected wild animals, Blood Pheasant (Ithaginis cruentus), Temminck’s Tragopan (Tragopan temminckii), Golden Pheasant (Chrysolophus pictus), Koklass Pheasant (Pucrasia macrolopha), Tibetan Snowcock (Tetraogallus tibetanus) were national class II key protected wild animals. Chinese Monal, Chestnut-throated Partridge, Golden Pheasant, Chinese Bamboo Partridge (Bambusicola thoracicus) were Chinese endemic species. Chinese Monal was evaluated as vulnerable by IUCN. Three pheasant species including Tibetan Snowcock, Tibetan Partridge (Perdix hodgsoniae) and Snow Partridge (Lerwa lerwa), were found to be the new records in the area. The results of different investigation methods showed that the occurrence rate of Chinese Monal, Temminck’s Tragopan and Blood Pheasant were high and distributed in various vegetation types. The diversity of pheasant species recorded in different regions was as follows: Mianzhu region (8 species) > Shiziwangfeng region (6 species) = Shifang region (6 species) = Xiaomuling region (6 species). The study found that Chinese Monal and Blood Pheasant were found in four different survey areas, however, Chinese Monal mainly distributed in the Shiziwangfeng region. Chestnut-throated Partridge, Tibetan Snowcock and Tibetan Partridge were only found in the Shiziwangfeng region, Golden Pheasant, Temminck’s Tragopan, Chinese Bamboo Partridge and Koklass Pheasant mainly distributed in the Shifang, Mianzhu and Xiaomuling region, Snow Partridge was only found in the Mianzhu and Shiziwangfeng region, Common Pheasant (Phasianus colchicus) was only found in the Mianzhu region. This study showed that different investigation methods were suitable for the investigation of pheasant species resources in this area, and the research results provided key scientific data for the accurate conservation and management of pheasant species in the future.pheasant species in the future.
From October 2021 to May 2022, the pheasant species in Deyang area of Giant Panda National Park were investigated by the methods of transect survey, trace survey, visit survey and infrared camera technology. Meanwhile, the monitoring data of infrared camera in this area since 2017 were collected and analyzed comprehensively. A total of 11 pheasant species were recorded, among which, Chinese Monal (Lophophorus lhuysii) and Chestnut-throated Partridge (Tetraophasis obscurus) were national class I key protected wild animals, Blood Pheasant (Ithaginis cruentus), Temminck’s Tragopan (Tragopan temminckii), Golden Pheasant (Chrysolophus pictus), Koklass Pheasant (Pucrasia macrolopha), Tibetan Snowcock (Tetraogallus tibetanus) were national class II key protected wild animals. Chinese Monal, Chestnut-throated Partridge, Golden Pheasant, Chinese Bamboo Partridge (Bambusicola thoracicus) were Chinese endemic species. Chinese Monal was evaluated as vulnerable by IUCN. Three pheasant species including Tibetan Snowcock, Tibetan Partridge (Perdix hodgsoniae) and Snow Partridge (Lerwa lerwa), were found to be the new records in the area. The results of different investigation methods showed that the occurrence rate of Chinese Monal, Temminck’s Tragopan and Blood Pheasant were high and distributed in various vegetation types. The diversity of pheasant species recorded in different regions was as follows: Mianzhu region (8 species) > Shiziwangfeng region (6 species) = Shifang region (6 species) = Xiaomuling region (6 species). The study found that Chinese Monal and Blood Pheasant were found in four different survey areas, however, Chinese Monal mainly distributed in the Shiziwangfeng region. Chestnut-throated Partridge, Tibetan Snowcock and Tibetan Partridge were only found in the Shiziwangfeng region, Golden Pheasant, Temminck’s Tragopan, Chinese Bamboo Partridge and Koklass Pheasant mainly distributed in the Shifang, Mianzhu and Xiaomuling region, Snow Partridge was only found in the Mianzhu and Shiziwangfeng region, Common Pheasant (Phasianus colchicus) was only found in the Mianzhu region. This study showed that different investigation methods were suitable for the investigation of pheasant species resources in this area, and the research results provided key scientific data for the accurate conservation and management of pheasant species in the future.pheasant species in the future.
2023, 44(2): 73-79.
doi: 10.12172/202206220001
Abstract:
To explore the effects of soil nutrients in purple soil and yellow soil on the yield and quality of bamboo shoots, and the soil nutrient conditions for cultivating high-quality white bamboo shoots were obtained, which provide theoretical support for soil management of white bamboo shoots forests in two regions. One artificially managed bamboo forest was selected respectively in Ya'an purple soil region and Dujiangyan yellow soil region, and each bamboo forest was set with 10m × 10m experiment plot, which was repeated for eight times. In May 2017, the soil and bamboo shoots samples collected in each experiment plot were detected and analyzed. The multiple regression method was used to screen the soil nutrient factors affecting the quality of bamboo shoots in different producing regions, and the regression equation between bamboo shoots nutrients and soil nutrient content was fitted. Finally, the relationship between nutrient components of bamboo shoots and soil nutrients was obtained. The results showed that the contents of total nitrogen and alkali hydrolyzable nitrogen in soil of two producing areas were high, but the contents of organic matter, total phosphorus and available phosphorus were low, and the contents of total potassium and available potassium were at normal level. The quality of bamboo shoots in yellow soil producing area is better than that of purple soil region, and there was a significant correlation between the nutrition of bamboo shoots and soil nutrients (P < 0.05). The main soil factors affecting the quality of bamboo shoots in purple soil area were soil pH, organic matter and available phosphorus. The soil factors affecting the quality of bamboo shoots in yellow soil area were mainly organic matter, available phosphorus and available potassium. Both of the two regions were lack of organic fertilizer and phosphate fertilizer, and the nitrogen fertilizer application was on the high side. The management was to increase the application of organic fertilizer and balance the application of nitrogen, phosphorus and potassium fertilizer. There was a significant correlation between soil nutrients and nutrient content of bamboo shoots, and the purpose of high quality and high yield of bamboo shoots could be achieved by adjusting soil physical and chemical properties and nutrient content.ing soil physical and chemical properties and nutrient content.
To explore the effects of soil nutrients in purple soil and yellow soil on the yield and quality of bamboo shoots, and the soil nutrient conditions for cultivating high-quality white bamboo shoots were obtained, which provide theoretical support for soil management of white bamboo shoots forests in two regions. One artificially managed bamboo forest was selected respectively in Ya'an purple soil region and Dujiangyan yellow soil region, and each bamboo forest was set with 10m × 10m experiment plot, which was repeated for eight times. In May 2017, the soil and bamboo shoots samples collected in each experiment plot were detected and analyzed. The multiple regression method was used to screen the soil nutrient factors affecting the quality of bamboo shoots in different producing regions, and the regression equation between bamboo shoots nutrients and soil nutrient content was fitted. Finally, the relationship between nutrient components of bamboo shoots and soil nutrients was obtained. The results showed that the contents of total nitrogen and alkali hydrolyzable nitrogen in soil of two producing areas were high, but the contents of organic matter, total phosphorus and available phosphorus were low, and the contents of total potassium and available potassium were at normal level. The quality of bamboo shoots in yellow soil producing area is better than that of purple soil region, and there was a significant correlation between the nutrition of bamboo shoots and soil nutrients (P < 0.05). The main soil factors affecting the quality of bamboo shoots in purple soil area were soil pH, organic matter and available phosphorus. The soil factors affecting the quality of bamboo shoots in yellow soil area were mainly organic matter, available phosphorus and available potassium. Both of the two regions were lack of organic fertilizer and phosphate fertilizer, and the nitrogen fertilizer application was on the high side. The management was to increase the application of organic fertilizer and balance the application of nitrogen, phosphorus and potassium fertilizer. There was a significant correlation between soil nutrients and nutrient content of bamboo shoots, and the purpose of high quality and high yield of bamboo shoots could be achieved by adjusting soil physical and chemical properties and nutrient content.ing soil physical and chemical properties and nutrient content.
2023, 44(2): 80-85.
doi: 10.12172/202210230002
Abstract:
The key bird species to be guarded against in the airport are the main bird-strike-causing species. It is of great significance to scientifically evaluate the bird-strike risks of different birds for the prevention of bird strikes in airport. In this study, the birds at Nanchong Gaoping Airport were investigated by the transect method and net capture method in 2021. A total of 60 species of birds were recorded, belonging to 33 families, 15 orders. The results showed that compared with 21 species in 2007, 25 species of key birds were found in 2021, among which 10 new species were increased and 6 species were lost. 15 species of birds, such as Columba livia and Hirundo rustica, had the same evaluation results. The main factors influencing the changes of bird species mainly include: the changes of ecological environment, the effective implementation of bird strike prevention at the airport and the enhancement of bird protection awareness. In combination with the biological characteristics of birds and the ecological environment around the airport, the suggestions on reducing the flowering and fruiting of plants in the flight area, controlling the grass height, killing insects and cleaning up the stagnant water environment were put forward for the airport, and some specific preventive measures were proposed for key bird species.
The key bird species to be guarded against in the airport are the main bird-strike-causing species. It is of great significance to scientifically evaluate the bird-strike risks of different birds for the prevention of bird strikes in airport. In this study, the birds at Nanchong Gaoping Airport were investigated by the transect method and net capture method in 2021. A total of 60 species of birds were recorded, belonging to 33 families, 15 orders. The results showed that compared with 21 species in 2007, 25 species of key birds were found in 2021, among which 10 new species were increased and 6 species were lost. 15 species of birds, such as Columba livia and Hirundo rustica, had the same evaluation results. The main factors influencing the changes of bird species mainly include: the changes of ecological environment, the effective implementation of bird strike prevention at the airport and the enhancement of bird protection awareness. In combination with the biological characteristics of birds and the ecological environment around the airport, the suggestions on reducing the flowering and fruiting of plants in the flight area, controlling the grass height, killing insects and cleaning up the stagnant water environment were put forward for the airport, and some specific preventive measures were proposed for key bird species.
2023, 44(2): 86-93.
doi: 10.12172/202203140001
Abstract:
Based on several field investigations, the quantitative characteristics and floristic composition of wild vascular plants in Chengdu Longquan Mountain Urban Forest Park were analyzed. The results showed that: (1) There were 628 species of wild vascular plants, belonging to 442 genera and 138 families and 7 species of national second-level key protected wild plants in this area. The herbaceous plants were the most abundant with a total of 392 species, accounting for 62.42% of all species. (2) In terms of family and genus composition, few species families and single species families were dominant, accounting for 78.26% of total number of families; In the genus composition, few species and single species were dominant, accounting for 98.87% of total number of genera. (3) The types of distribution were various, including 10 types and 5 variants at the family level, and the tropical component were dominant. There were 14 distribution types and 18 variants at the genus level, and the tropical component were slightly more than the temperate component, which had obvious subtropical characteristics.
Based on several field investigations, the quantitative characteristics and floristic composition of wild vascular plants in Chengdu Longquan Mountain Urban Forest Park were analyzed. The results showed that: (1) There were 628 species of wild vascular plants, belonging to 442 genera and 138 families and 7 species of national second-level key protected wild plants in this area. The herbaceous plants were the most abundant with a total of 392 species, accounting for 62.42% of all species. (2) In terms of family and genus composition, few species families and single species families were dominant, accounting for 78.26% of total number of families; In the genus composition, few species and single species were dominant, accounting for 98.87% of total number of genera. (3) The types of distribution were various, including 10 types and 5 variants at the family level, and the tropical component were dominant. There were 14 distribution types and 18 variants at the genus level, and the tropical component were slightly more than the temperate component, which had obvious subtropical characteristics.
2023, 44(2): 94-102.
doi: 10.12172/202209080003
Abstract:
As a representative of the protection characteristics of China’s ecosystem, national parks have become one of the important tourist destinations in recent years, and the research on their network attention can provide reference for the ecotourism network marketing of national parks. According to the daily index of Baidu Index in Wuyi Mountain National Park for 11 years from 2011 to 2021, the temporal and spatial variation characteristics of network attention were explored by using multi-index and spatial distribution degree analysis. The results showed that: (1) The daily average inter-annual network attention of Wuyishan National Park showed obvious “single peak” characteristics; The monthly average network attention had the seasonal characteristics of “double peaks”, in which April and July were the peak periods and January was the trough period; The network attention gradually increased before the May Day holidays, but decreased during the holiday, which was consistent with the "precursor" effect of tourists’ holiday travel; During the National Day holidays, the network attention gradually increased and then decreased, with an obvious “single peak” trend, and tourists may had the phenomenon of “peak-shifting” travel. (2) From 2011 to 2021, the spatial distribution and concentration of the overall network attention were scattered, and the level of network attention and spatial concentration in the three major areas was consistent as a whole, showing that the eastern region > the central region > the western region. (3) The network attention of Wuyishan National Park was positively correlated with GDP, total population and per capita disposable income, and negatively correlated with spatial distance. In the end, the targeted strategies were put forward in order to realize the sustainable development of Wuyi Mountain National Park.s positively correlated with GDP, total population and per capita disposable income, and negatively correlated with spatial distance. In the end, the targeted strategies were put forward in order to realize the sustainable development of Wuyi Mountain National Park.
As a representative of the protection characteristics of China’s ecosystem, national parks have become one of the important tourist destinations in recent years, and the research on their network attention can provide reference for the ecotourism network marketing of national parks. According to the daily index of Baidu Index in Wuyi Mountain National Park for 11 years from 2011 to 2021, the temporal and spatial variation characteristics of network attention were explored by using multi-index and spatial distribution degree analysis. The results showed that: (1) The daily average inter-annual network attention of Wuyishan National Park showed obvious “single peak” characteristics; The monthly average network attention had the seasonal characteristics of “double peaks”, in which April and July were the peak periods and January was the trough period; The network attention gradually increased before the May Day holidays, but decreased during the holiday, which was consistent with the "precursor" effect of tourists’ holiday travel; During the National Day holidays, the network attention gradually increased and then decreased, with an obvious “single peak” trend, and tourists may had the phenomenon of “peak-shifting” travel. (2) From 2011 to 2021, the spatial distribution and concentration of the overall network attention were scattered, and the level of network attention and spatial concentration in the three major areas was consistent as a whole, showing that the eastern region > the central region > the western region. (3) The network attention of Wuyishan National Park was positively correlated with GDP, total population and per capita disposable income, and negatively correlated with spatial distance. In the end, the targeted strategies were put forward in order to realize the sustainable development of Wuyi Mountain National Park.s positively correlated with GDP, total population and per capita disposable income, and negatively correlated with spatial distance. In the end, the targeted strategies were put forward in order to realize the sustainable development of Wuyi Mountain National Park.
2023, 44(2): 103-110.
doi: 10.12172/202206010001
Abstract:
Western Sichuan region is one of the high-risk areas for forest fires. Study on the flammability-related characteristics of common shrub species in western Sichuan region is helpful to assess the risk and intensity of wildfires for different shrubs, and facilitate to identify the fire-resistant species for biological fire protection. In this study, twelve common shrub species in western Sichuan region were selected to determine the moisture content, ash content, ignition point and calorific value of shrub branches respectively. In addition, principal component analysis was used to evaluate the variation of flammability-related characteristics of different species. The results showed that there were significant differences in ash content, ignition point and calorific value among different species, and there were also great differences in water content. According to the comprehensive analysis of the flammability-related characteristics, the 12 shrubs could be divided into three categories: strong fire resistance, fire resistance and weak fire resistance. Among them, the southwest wood blue and cotoneaster were shrub species with strong fire resistance; three needles, oak tree (saplings), iron jaundice, honeysuckle, rosemary, scattered cotoneaster Zi and Dian Hazel were fire-resistant shrub species; Rhododendron, Zanthoxylum bungeanum and Potentilla fruticosa were weak fire-resistant shrub species. In this study, the flammability-related characteristics of 12 shrub species from western Sichuan region were measured and analyzed, which provided data for local fire prevention. The flammability-related characteristics of 12 shrub species from western Sichuan region were measured and analyzed, which provided data for local fire prevention.
Western Sichuan region is one of the high-risk areas for forest fires. Study on the flammability-related characteristics of common shrub species in western Sichuan region is helpful to assess the risk and intensity of wildfires for different shrubs, and facilitate to identify the fire-resistant species for biological fire protection. In this study, twelve common shrub species in western Sichuan region were selected to determine the moisture content, ash content, ignition point and calorific value of shrub branches respectively. In addition, principal component analysis was used to evaluate the variation of flammability-related characteristics of different species. The results showed that there were significant differences in ash content, ignition point and calorific value among different species, and there were also great differences in water content. According to the comprehensive analysis of the flammability-related characteristics, the 12 shrubs could be divided into three categories: strong fire resistance, fire resistance and weak fire resistance. Among them, the southwest wood blue and cotoneaster were shrub species with strong fire resistance; three needles, oak tree (saplings), iron jaundice, honeysuckle, rosemary, scattered cotoneaster Zi and Dian Hazel were fire-resistant shrub species; Rhododendron, Zanthoxylum bungeanum and Potentilla fruticosa were weak fire-resistant shrub species. In this study, the flammability-related characteristics of 12 shrub species from western Sichuan region were measured and analyzed, which provided data for local fire prevention. The flammability-related characteristics of 12 shrub species from western Sichuan region were measured and analyzed, which provided data for local fire prevention.
2023, 44(2): 111-115.
doi: 10.12172/202204080002
Abstract:
Taking Pinus massoniana plantations with different forest ages (8 a, 20 a, 32 a, 50 a) as the research object, the soil total nitrogen and available nitrogen contents in different forest ages, soil layers and different months were compared and analyzed. The results showed that: (1) Soil total nitrogen and available nitrogen content increased with the age of Pinus massoniana plantation; (2) Soil total nitrogen and available nitrogen cotent decreased with the increase of soil depth; (3) In one growth cycle of Pinus massoniana plantation, soil total nitrogen and available nitrogen content were different among different age groups in different months, and generally showed a rising-falling-rising trend, which increased with the increase of soil temperature and water content.
Taking Pinus massoniana plantations with different forest ages (8 a, 20 a, 32 a, 50 a) as the research object, the soil total nitrogen and available nitrogen contents in different forest ages, soil layers and different months were compared and analyzed. The results showed that: (1) Soil total nitrogen and available nitrogen content increased with the age of Pinus massoniana plantation; (2) Soil total nitrogen and available nitrogen cotent decreased with the increase of soil depth; (3) In one growth cycle of Pinus massoniana plantation, soil total nitrogen and available nitrogen content were different among different age groups in different months, and generally showed a rising-falling-rising trend, which increased with the increase of soil temperature and water content.
2023, 44(2): 116-121.
doi: 10.12172/202205060001
Abstract:
People prefer daylily flowers with brighter and more saturated colours. Among the eight colour groups surveyed, pink, orange and cream were the first three most popular colours. Among the measured colours of daylily, the brightest colours were in the orange and yellow-orange groups, and the least bright colours were in the purple group. The highest colour saturation was in the orange group and the lowest colour saturation was in the grey-violet group. The pathway of anthocyanin metabolism in daylily flower were more smooth, and it was not easy to form light-coloured flowers with less pigment content. The carotenoids measured in daylily flowers were all located in the downstream of lycopene metabolism, and it was difficult for carotenoids to dominate the formation of red and pink colours of daylily flowers. The selection of daylily varieties with highest brightness, light colour as the parents can broaden the range of flower colour in the offspring group, and accelerate the cultivation of daylily varieties that meet the aesthetic preferences of the public.rieties that meet the aesthetic preferences of the public.
People prefer daylily flowers with brighter and more saturated colours. Among the eight colour groups surveyed, pink, orange and cream were the first three most popular colours. Among the measured colours of daylily, the brightest colours were in the orange and yellow-orange groups, and the least bright colours were in the purple group. The highest colour saturation was in the orange group and the lowest colour saturation was in the grey-violet group. The pathway of anthocyanin metabolism in daylily flower were more smooth, and it was not easy to form light-coloured flowers with less pigment content. The carotenoids measured in daylily flowers were all located in the downstream of lycopene metabolism, and it was difficult for carotenoids to dominate the formation of red and pink colours of daylily flowers. The selection of daylily varieties with highest brightness, light colour as the parents can broaden the range of flower colour in the offspring group, and accelerate the cultivation of daylily varieties that meet the aesthetic preferences of the public.rieties that meet the aesthetic preferences of the public.
2023, 44(2): 122-129.
doi: 10.12172/202204260001
Abstract:
Under the background of the "double carbon" goal and sustainable development, this paper discussed the changes of land use pattern and the response of the ecological environment in Yibin city, the first city of the Yangtze River, since the implementation of ecological projects such as returning farmland to forests and protecting natural resources of natural forests, so as to provide an important scientific basis for the regional land spatial planning and ecological environment managemtn. Based on the remote sensing image data of 2000, 2010 and 2020, the land use change and its ecological environment effect in Yibin from the aspects of land use dynamics, ecological environment quality and ecosystem service value were comprehensively analyzed. The results showed that: (1) Since 2000, the land use change in Yibin city was mainly manifested as the decrease of grassland and cultivated land area, the fluctuation of woodland area, and the area of construction land and water body increased. Construction land and water bodies had the largest dynamic change with a positive direction. (2) During the past 20 years, the value of ecosystem services increased from 33.321 billion yuan to 34.782 billion yuan, an increase of 1.461 billion yuan. (3) In 2000, 2010 and 2020, the ecological environment quality index was 0.4065, 0.4077 and 0.4078 respectively. The eco-environmental quality of the study area showed an upward trend while maintaining a relative balance, but both improvement and deterioration coexisted in this region. There is a long way to go to build the first ecological city of the Yangtze River in Yibin. In the future, The ecological restoration work in Minjiang River and Xiangjiaba reservoir area should continue to be solidly promoted, with emphasis on improving the service capacity of regional ecosystems, so as to effectively take the road of ecological and low-carbon development in Yibin.
Under the background of the "double carbon" goal and sustainable development, this paper discussed the changes of land use pattern and the response of the ecological environment in Yibin city, the first city of the Yangtze River, since the implementation of ecological projects such as returning farmland to forests and protecting natural resources of natural forests, so as to provide an important scientific basis for the regional land spatial planning and ecological environment managemtn. Based on the remote sensing image data of 2000, 2010 and 2020, the land use change and its ecological environment effect in Yibin from the aspects of land use dynamics, ecological environment quality and ecosystem service value were comprehensively analyzed. The results showed that: (1) Since 2000, the land use change in Yibin city was mainly manifested as the decrease of grassland and cultivated land area, the fluctuation of woodland area, and the area of construction land and water body increased. Construction land and water bodies had the largest dynamic change with a positive direction. (2) During the past 20 years, the value of ecosystem services increased from 33.321 billion yuan to 34.782 billion yuan, an increase of 1.461 billion yuan. (3) In 2000, 2010 and 2020, the ecological environment quality index was 0.4065, 0.4077 and 0.4078 respectively. The eco-environmental quality of the study area showed an upward trend while maintaining a relative balance, but both improvement and deterioration coexisted in this region. There is a long way to go to build the first ecological city of the Yangtze River in Yibin. In the future, The ecological restoration work in Minjiang River and Xiangjiaba reservoir area should continue to be solidly promoted, with emphasis on improving the service capacity of regional ecosystems, so as to effectively take the road of ecological and low-carbon development in Yibin.
2023, 44(2): 130-136.
doi: 10.12172/202204260002
Abstract:
Holcoglossum omeiense Z.H.Tsi ex X.H.Jin is an endemic species of China, and it is also endangered wild plants with extremely small population. In order to understand the current status of H. omeienseʼs germplasm resources and find out the position of its epiphytic host in the community, field investigation was carried out in Mount Emei and its adjacent areas for five consecutive years, and finally the epiphytic community was investigated by typical sample method in 2021. The results showed that: (1) There was only one distribution area of wild H. omeiense population and the population number was less than 300. The natural fruiting rate was extremely low, and the proportion of seedlings was low. (2) H. omeiense was epiphytic on 15 hosts of 8 tree species in 11 distribution points in this distribution area, and the epiphytic point was often higher than 10 meters. Phoebe zhennan was the main host, and H. omeiense had an epiphytic preference for it. (3) There were 140 species of vascular plants in the epiphytic community and H. omeiense was the only orchid. P. zhennan, the main host, was the dominant species in the arbor layer with the highest importance value. H. omeiense was the dominant species in the herb layer of the community. The community was tropical in distribution, and the analysis of genera showed that the community had a tendency of transition to warm temperate zone. It is suggested that the wild population of H. omeiense should be protected in situ, and the conservation research should be carried out as soon as possible. the wild population of H. omeiense should be protected in situ, and the conservation research should be carried out as soon as possible. the wild population of H. omeiense should be protected in situ, and the conservation research should be carried out as soon as possible.
Holcoglossum omeiense Z.H.Tsi ex X.H.Jin is an endemic species of China, and it is also endangered wild plants with extremely small population. In order to understand the current status of H. omeienseʼs germplasm resources and find out the position of its epiphytic host in the community, field investigation was carried out in Mount Emei and its adjacent areas for five consecutive years, and finally the epiphytic community was investigated by typical sample method in 2021. The results showed that: (1) There was only one distribution area of wild H. omeiense population and the population number was less than 300. The natural fruiting rate was extremely low, and the proportion of seedlings was low. (2) H. omeiense was epiphytic on 15 hosts of 8 tree species in 11 distribution points in this distribution area, and the epiphytic point was often higher than 10 meters. Phoebe zhennan was the main host, and H. omeiense had an epiphytic preference for it. (3) There were 140 species of vascular plants in the epiphytic community and H. omeiense was the only orchid. P. zhennan, the main host, was the dominant species in the arbor layer with the highest importance value. H. omeiense was the dominant species in the herb layer of the community. The community was tropical in distribution, and the analysis of genera showed that the community had a tendency of transition to warm temperate zone. It is suggested that the wild population of H. omeiense should be protected in situ, and the conservation research should be carried out as soon as possible. the wild population of H. omeiense should be protected in situ, and the conservation research should be carried out as soon as possible. the wild population of H. omeiense should be protected in situ, and the conservation research should be carried out as soon as possible.
2023, 44(2): 137-142.
doi: 10.12172/202204250003
Abstract:
The driving factors of spatial and temporal distribution of ecosystem services in Shandong province were analyzed, and the main factors of local ecosystem services being inhibited were found, so as to improve the productivity of forest, cultivated land and water system. Based on InVEST model, taking Shandong province as the research area, the quality of three ecosystem services, including water conservation, soil conservation and habitat quality, and the hierarchical function zone among three ecosystem services in 2010, 2015 and 2020 were evaluated. The results showed that: (1) The conversion of land use was mainly between grassland and cultivated land, and between cultivated land, forest land, water body and urban construction land. (2) Water conservation and soil conservation showed a trend of first decreasing and then increasing, and the habitat quality index decreased year by year. (3) The distribution of ecosystem services in Shandong province showed a zonal pattern, with a northeast-southwest trend, and the importance level of ecosystem services decreased gradually. The results indicated that the overall urbanization speed of Shandong province was obviously accelerating, the frequency of land use transformation was relatively fast, and the contradiction between man and land was intensifying.n speed of Shandong province was obviously accelerating, the frequency of land use transformation was relatively fast, and the contradiction between man and land was intensifying.n speed of Shandong province was obviously accelerating, the frequency of land use transformation was relatively fast, and the contradiction between man and land was intensifying.
The driving factors of spatial and temporal distribution of ecosystem services in Shandong province were analyzed, and the main factors of local ecosystem services being inhibited were found, so as to improve the productivity of forest, cultivated land and water system. Based on InVEST model, taking Shandong province as the research area, the quality of three ecosystem services, including water conservation, soil conservation and habitat quality, and the hierarchical function zone among three ecosystem services in 2010, 2015 and 2020 were evaluated. The results showed that: (1) The conversion of land use was mainly between grassland and cultivated land, and between cultivated land, forest land, water body and urban construction land. (2) Water conservation and soil conservation showed a trend of first decreasing and then increasing, and the habitat quality index decreased year by year. (3) The distribution of ecosystem services in Shandong province showed a zonal pattern, with a northeast-southwest trend, and the importance level of ecosystem services decreased gradually. The results indicated that the overall urbanization speed of Shandong province was obviously accelerating, the frequency of land use transformation was relatively fast, and the contradiction between man and land was intensifying.n speed of Shandong province was obviously accelerating, the frequency of land use transformation was relatively fast, and the contradiction between man and land was intensifying.n speed of Shandong province was obviously accelerating, the frequency of land use transformation was relatively fast, and the contradiction between man and land was intensifying.
2023, 44(2): 143-148.
doi: 10.12172/202206070003
Abstract:
In order to further explore the impact of climate change on the potential distribution of Juglans cathayensis Dode. in Sichuan, base on the actual distribution points data of Juglans cathayensis Dode. in China, bioclimatic variables under climate change scenarios (SSP1-2.6 and SSP5-8.5) and combined with the maximum entropy model (MaxEnt model), the potential suitable area of Juglans cathayensis Dode. in the 2050s and 2090s was predicted under the SSP1-2.6 and SSP5-8.5 scenario. The result showed that: (1) Under the current climate scenario, the high suitability area of Juglans cathayensis Dode. in Sichuan was 4.86×104 km2, and the moderate suitability area was 13.35×104 km2; (2) Under the SSP1-2.6 and SSP5-8.5 scenario, the high suitable areas were 5.09×104 km2 and 8.58×104 km2 respectively, and the moderate suitable areas were 7.37×104 km2 and 7.02×104 km2 respectively in the 2050s and 2090s. (3) Under the SSP1-2.6 and SSP5-8.5 scenario, the barycenter of high suitability area will respectively move 34.49 km and 21.94 km from the current position by the 2090s. Climate warming will expand the suitable range of Juglans cathayensis Dode. in Sichuan, but not infinitely.
In order to further explore the impact of climate change on the potential distribution of Juglans cathayensis Dode. in Sichuan, base on the actual distribution points data of Juglans cathayensis Dode. in China, bioclimatic variables under climate change scenarios (SSP1-2.6 and SSP5-8.5) and combined with the maximum entropy model (MaxEnt model), the potential suitable area of Juglans cathayensis Dode. in the 2050s and 2090s was predicted under the SSP1-2.6 and SSP5-8.5 scenario. The result showed that: (1) Under the current climate scenario, the high suitability area of Juglans cathayensis Dode. in Sichuan was 4.86×104 km2, and the moderate suitability area was 13.35×104 km2; (2) Under the SSP1-2.6 and SSP5-8.5 scenario, the high suitable areas were 5.09×104 km2 and 8.58×104 km2 respectively, and the moderate suitable areas were 7.37×104 km2 and 7.02×104 km2 respectively in the 2050s and 2090s. (3) Under the SSP1-2.6 and SSP5-8.5 scenario, the barycenter of high suitability area will respectively move 34.49 km and 21.94 km from the current position by the 2090s. Climate warming will expand the suitable range of Juglans cathayensis Dode. in Sichuan, but not infinitely.
2023, 44(2): 149-152.
doi: 10.12172/202205120003
Abstract:
In this paper, a new record genus of Orchidaceae in Chongqing, Cheirostylis Blume, and its new record species, Cheirostylis chinensis Rolfe, were reported. The detailed morphological description, habitat distribution were described with color photos. The vouncher specimen was preserved in the Herbarium of Chongqing Museum Natural History (CQNM).served in the Herbarium of Chongqing Museum Natural History (CQNM).
In this paper, a new record genus of Orchidaceae in Chongqing, Cheirostylis Blume, and its new record species, Cheirostylis chinensis Rolfe, were reported. The detailed morphological description, habitat distribution were described with color photos. The vouncher specimen was preserved in the Herbarium of Chongqing Museum Natural History (CQNM).served in the Herbarium of Chongqing Museum Natural History (CQNM).
2023, 44(2): 153-155.
doi: 10.12172/202204270001
Abstract:
During a field investigation in 2020, some beetles of Nosodendridae were found in Shandong province, which was not recorded in Shandong province. In this paper, the species was identified and described. After dissecting the adults, the species was identified according to their morphological characteristics, and their living conditions were observed in the field. This species was identified as Nosodendron taiwanense Yoshitomi, Kishimoto & Lee, 2015 (Coleoptera, Bostrichoidea: Nosodendridae). The specie was first recorded in China mainland, and the family was also first recorded in Shandong province. In this paper, the species was redescribed and its ecological and behavioral information was supplemented.was redescribed and its ecological and behavioral information was supplemented.was redescribed and its ecological and behavioral information was supplemented.was redescribed and its ecological and behavioral information was supplemented.
During a field investigation in 2020, some beetles of Nosodendridae were found in Shandong province, which was not recorded in Shandong province. In this paper, the species was identified and described. After dissecting the adults, the species was identified according to their morphological characteristics, and their living conditions were observed in the field. This species was identified as Nosodendron taiwanense Yoshitomi, Kishimoto & Lee, 2015 (Coleoptera, Bostrichoidea: Nosodendridae). The specie was first recorded in China mainland, and the family was also first recorded in Shandong province. In this paper, the species was redescribed and its ecological and behavioral information was supplemented.was redescribed and its ecological and behavioral information was supplemented.was redescribed and its ecological and behavioral information was supplemented.was redescribed and its ecological and behavioral information was supplemented.
