Loss rate of net primary productivity under drought stress on the Yinshanbeilu of Inner Mongolia, China

• DOI: 10.3389/fpls.2025.1438343
• Publication Date: 2025-02-19T06:53:28Z
• Authors: Wang Sinan; Yingjie Wu; Wenjun Wang; Jianyin Guo; Mingyang Li
• Keywords: Inner mongolia; Drought stress; Drought Resistance; Water Stress

The increasing intensity and frequency of droughts seriously threaten the structure function terrestrial ecosystems. In order to ensure normal play ecosystem service under future stress, temporal spatial characteristics productivity response drought need be explored. net primary production (NPP) vegetation in Yinshanbeilu was calculated using Carnegie-Ames-Stanford Approach (CASA) model, subsequent study concentrated on NPP's geographical variable characteristics. By calculation standard precipitation evapotranspiration index (SPEI), also sought examine relationship between NPP at various time scales. Researchers built loss rate curves based fertility stages vulnerability curve construction method. Findings revealed that SPEI had varying degrees efficacy capturing conditions frames. Nonetheless, SPEI's distribution, which shows a wet distribution east an arid west, exhibited identical for all scales may used indicate drought. Significant interannual variation seen area's vegetation, fluctuated upward direction from 2000 2020. 75.89%, 77.23%, 81.35%, 83.56% area were found have positive correlation scales, with 42.53%, 48.15%, 90.72%, 92.75% passing significance test (p < 0.05), order. Their results showed as scale increased, link became stronger. grew regularly expansion degree, 20-50%, according created each period.