Changes of land use and wetland landscape pattern driven by the ecological restoration of lakeside wetland in Dianchi Lake

Dianchi Lake is the largest wetland lake in the lake area of Yunnan-Guizhou Plateau. To clarify the the change law of lakeside land use and wetland landscape pattern, and provide ecological restoration strategies to maintain ecosystem integrity, which had a demonstration role for other wetlands. Google Earth Pro software was used to sketch the patches of different land cover in the lakeside zone between the lakeshore and the lakeroad of Dianchi Lake in 2005, 2010, 2015 and 2020 respectively, and the changes and transfers among these land use types were counted. Additionally, the landscape pattern index of wetland patches was analyzed by Fragstats software. The results showed that the main land use types along the Dianchi lakeside comprised cultivated land, wetland, grassland, and residential land. The main transfer trend of land use types was the transfer of cultivated land to garden, woodland, grassland, wetland, residential land, and traffic land. Notably, grassland areas were significantly converted into woodland area, while wetlands experienced a decline primarily due to the conversion into traffic land and woodland. Furthermore, the wetland landscape pattern exhibited a concerning trend of increasing fragmentation and decreasing connectivity. In light of these findings, it is recommended that the relevant authorities should fully consider the connectivity of wetland in the subsequent wetland restoration and construction endeavors.