Evolution of Land Use Landscape Patterns in Karst Watersheds of Guizhou Plateau and Its Ecological Security Evaluation

Landscape ecological safety is of great significance in maintaining balance, protection, economic development, and promoting the sustainable use regional land resources. This study collects three-phase remote sensing (RS) image data 2000, 2010, 2020 to elucidate spatial temporal changes Guizhou Plateau Karst Watershed. We construct a landscape security index using ArcGIS pattern method. With autocorrelation theory, we analyze evolution watershed patterns characteristics security. The results show that cultivated being converted construction from 2000 2020. percentage patch area constructed increasing. However, cohesion land, grassland, decreasing. Nanming River Basin positive trend, clustering central urban areas. growth rate increased by 5.80% 2020, aggregation was dominated high–high low–low aggregation, which spatially positively correlated with effect. findings provide scientific reference for managing balance optimizing resource allocation karst watersheds.