Grassland-type ecosystem stability in China differs under the influence of drought and wet events

作     者：CAO Wenyu BAI Jianjun YU Leshan CAO Wenyu;BAI Jianjun;YU Leshan

作者机构：School of Geography and TourismShaanxi Normal UniversityXi'an 710119China International Business SchoolShaanxi Normal UniversityXi'an 710119China 

出 版 物：《Journal of Arid Land》 (干旱区科学（英文版）)

年 卷 期：2024年第16卷第5期

页      面：615-631页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 090503[农学-草业科学] 0909[农学-草学] 07[理学] 0905[农学-畜牧学] 09[农学] 0903[农学-农业资源与环境] 0713[理学-生态学] 

基　　金：the National Natural Science Foundation of China(42271289) 

主　　题：grassland ecosystem stability resistance resilience different climate types drought climate event wet climate event 

摘      要：Ecological stability is a core issue in ecological research and holds significant implications forhumanity. The increased frequency and intensity of drought and wet climate events resulting from climatechange pose a major threat to global ecological stability. Variations in stability among different ecosystemshave been confirmed, but it remains unclear whether there are differences in stability within the sameterrestrial vegetation ecosystem under the influence of climate events in different directions and *** s grassland ecosystem includes most grassland types and is a good choice for studying this *** study used the Standardized Precipitation Evapotranspiration Index-12 (SPEI-12) to identify thedirections and intensities of different types of climate events, and based on Normalized DifferenceVegetation Index (NDVI), calculated the resistance and resilience of different grassland types for 30consecutive years from 1990 to 2019 (resistance and resilience are important indicators to measurestability). Based on a traditional regression model, standardized methods were integrated to analyze theimpacts of the intensity and duration of drought and wet events on vegetation stability. The resultsshowed that meadow steppe exhibited the highest stability, while alpine steppe and desert steppe had thelowest overall stability. The stability of typical steppe, alpine meadow, temperate meadow was at anintermediate level. Regarding the impact of the duration and intensity of climate events on vegetationecosystem stability for the same grassland type, the resilience of desert steppe during drought was mainlyaffected by the duration. In contrast, the impact of intensity was not significant. However, alpine steppewas mainly affected by intensity in wet environments, and duration had no significant impact. Ourconclusions can provide decision support for the future grassland ecosystem governance.