The Population Characteristics of Natural <i>Cupressus chengiana</i> Forests under Different Disturbance Intensity in the Dadu River Basin

LI Xu-jia; ZHANG Ting-duan; LAN Li-da; LI De-wen; GAO Fei; WANG Hong-rong; WANG Li-li; FENG Wei

doi:10.16779/j.cnki.1003-5508.2017.02.016

WE ARE COMMITTED TO REPORTING THE LATEST FORESTRY ACADEMIC ACHIEVEMENTS

PDF
Cite
Share

facebook

twitter

google

linkedin

Volume 38 Issue 2

Nov. 2019

Article Contents

Turn off MathJax

Article Navigation > Journal of Sichuan Forestry Science and Technology > 2017 > 38(2): 91-96,54

LI Xu-jia, ZHANG Ting-duan, LAN Li-da, LI De-wen, GAO Fei, WANG Hong-rong, WANG Li-li, FENG Wei. The Population Characteristics of Natural Cupressus chengiana Forests under Different Disturbance Intensity in the Dadu River Basin[J]. Journal of Sichuan Forestry Science and Technology, 2017, 38(2): 91-96,54. doi: 10.16779/j.cnki.1003-5508.2017.02.016

Citation:

LI Xu-jia, ZHANG Ting-duan, LAN Li-da, LI De-wen, GAO Fei, WANG Hong-rong, WANG Li-li, FENG Wei. The Population Characteristics of Natural Cupressus chengiana Forests under Different Disturbance Intensity in the Dadu River Basin[J]. Journal of Sichuan Forestry Science and Technology, 2017, 38(2): 91-96,54. doi: 10.16779/j.cnki.1003-5508.2017.02.016

The Population Characteristics of Natural Cupressus chengiana Forests under Different Disturbance Intensity in the Dadu River Basin

doi: 10.16779/j.cnki.1003-5508.2017.02.016

More Information

Forestry Ecological and Environmental Monitoring Center of Sichuan Province, Chengdu 624000, China;Sichuan Maerkang Forestry Bureau, Maerkang 624000, China;Sichuan Forest Inventory and Plan Institute, Chengdu 610081, China

Received Date: 2016-11-25

Abstract

The Cupressus chengiana S.Y.Hu is one of national second-level protected species,mainly distributed in the basins of Minjiang,Dadu and Bailong rivers.Its natural distribution area is also the living area of residents,and therefore being affected by grazing,cutting,wood burning and other human activity disturbance.Based on the disturbance type and intensity,the C.chengiana forests were divided into excessive,severe,moderate and mild disturbance types,respectively.In order to answer the affects of different disturbance intensity on the C.chengiana population characteristics,analysis was made of population density,heights,DBH and population structure of different disturbance types.The results showed that trees of C.chenginia of all levels of DBH,heights and basal diameter scattered under mild disturbance type,but the percentage of seedlings and saplings was small,intermediate grade trees were more,hence the population structure was reasonable.Under moderate disturbance,small levels of C.chengiana accounted for the main body,middle level trees had also some distribution,and C.chengiana populations might returns to the normal state.Under the severe disturbance,there were many low level trees,but the higher level trees were scarce.Under the excessive disturbance,there were not higher level trees.In a word,the tree age,height,DBH,and DBH structure were more reasonable,and the population could naturally regenerate under the mild and moderate disturbance.But the rationality and stability of population structure was bad,and could hardly complete natural regeneration under the excessive and severe disturbance.
- Cupressus chengiana;
- Disturbance intensity;
- Density;
- DBH;
- Tree height
References
Proportional views

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Get Citation

PDF

XML

Article views(400) PDF downloads(10) Cited by()

Proportional views

The Population Characteristics of Natural Cupressus chengiana Forests under Different Disturbance Intensity in the Dadu River Basin

doi: 10.16779/j.cnki.1003-5508.2017.02.016

Forestry Ecological and Environmental Monitoring Center of Sichuan Province, Chengdu 624000, China;Sichuan Maerkang Forestry Bureau, Maerkang 624000, China;Sichuan Forest Inventory and Plan Institute, Chengdu 610081, China

Received Date: 2016-11-25

Key words:

Abstract: The Cupressus chengiana S.Y.Hu is one of national second-level protected species,mainly distributed in the basins of Minjiang,Dadu and Bailong rivers.Its natural distribution area is also the living area of residents,and therefore being affected by grazing,cutting,wood burning and other human activity disturbance.Based on the disturbance type and intensity,the C.chengiana forests were divided into excessive,severe,moderate and mild disturbance types,respectively.In order to answer the affects of different disturbance intensity on the C.chengiana population characteristics,analysis was made of population density,heights,DBH and population structure of different disturbance types.The results showed that trees of C.chenginia of all levels of DBH,heights and basal diameter scattered under mild disturbance type,but the percentage of seedlings and saplings was small,intermediate grade trees were more,hence the population structure was reasonable.Under moderate disturbance,small levels of C.chengiana accounted for the main body,middle level trees had also some distribution,and C.chengiana populations might returns to the normal state.Under the severe disturbance,there were many low level trees,but the higher level trees were scarce.Under the excessive disturbance,there were not higher level trees.In a word,the tree age,height,DBH,and DBH structure were more reasonable,and the population could naturally regenerate under the mild and moderate disturbance.But the rationality and stability of population structure was bad,and could hardly complete natural regeneration under the excessive and severe disturbance.