[Wilderness network construction in Lincang City of Yunnan Province, Southwest China based on landscape connectivity].

Abstract

Constructing wilderness networks based on landscape connectivity is crucial for wilderness conservation. We calculated the continuous spectrum of the wilderness with GIS, identified wilderness sources with morphological spatial pattern analysis (MSPA), constructed wilderness corridors and networks and extracted wilderness strategic points with minimum cumulative resistance model (MCR) and circuit theory. We further analyzed the characte-ristics of the wilderness network, and proposed wilderness protection strategies and ecological planning suggestions for Lincang City. Results showed that wilderness was mainly distributed at 1000-2500 m elevation, with a spatial pattern of more in the south and east, less in the north and west in Lincang City. Grade 3 wilderness covered 55% of the total area, indicating high quality of the study area. Based on the MSPA analysis, we found 27 wilderness sources, most of which were distributed in the eastern and southern areas such as Linxiang and Cangyuan. The western and northern such as Fengqing and Yongde had fewer wilderness sources. There were 63 wilderness corridors in the wilderness network, including 16 important corridors and 47 general corridors. There were 186 strategic points in the wilderness network, including 53 wilderness nodes and 133 barrier points. We constructed the wilderness network of Lincang based in the identified wilderness source areas and extracted wilderness corridors, which had the advantages of high stability, strong resistance to interference, efficient connectivity. Finally, we proposed the "three-zone as a whole" protection strategy and ecological planning suggestions, which had referential value for establishing an ecological security pattern in Lincang City and the practicalization of wilderness protection in China.