Influence of landscape pattern changes on water conservation capacity: A case study in an arid/semiarid region of China

• DOI: 10.1016/j.ecolind.2024.112082
• Publication Date: 2024-04-29T10:32:20Z
• Authors: Changxue Wu; Peng Gao; Ruirui Xu; Xingmin Mu; Wenyi Sun
• Keywords: Fragmentation; Diversity index; Aridity index

With the accelerating changes of land use/cover caused by natural and human factors, landscape pattern has undergone significant changes. Given scarcity water resources degradation ecological functions in arid semi-arid regions China, it is necessary to analyze impact on conservation. Taking Wei River Basin (WRB) as research area, based balance equations, FRAGSTATS 4.2 software, correlation analysis method, this study explored spatiotemporal distribution characteristics conservation WRB from 1990 2020, well correlations between two. The results showed that 2020: (1) capacity (WCC) no insignificant change trend (P > 0.05) sub basins entire WRB, presented a spatial more south west, less north east; (2) diversity fragmentation have increased, patch shapes tended be complex, while connectivity agglomeration patches decreased; (3) WCC had negative with Contagion Index (CONTAG), index (COHESION), largest (LPI), positive shape (LSI), Shannon (SHDI), separation (SPLIT), indicating increase was conducive improvement WCC. In process planning optimization, degree can appropriately increased. (4) Vegetated grassland, forestland, farmland were main sources WCC, average values 81.90, 68.04, 8.72 mm, respectively. NDVI watershed increased significantly < 0.01) during period promoting effect increasing vegetation coverage Relevant may provide referential information for restoration optimization arid/semiarid regions.