Spatio-Temporal Evolution of Net Ecosystem Productivity and Its Influencing Factors in Northwest China, 1982–2022 DOI Creative Commons
Weijie Zhang, Zhichao Xu, Haobo Yuan

et al.

Agriculture, Journal Year: 2025, Volume and Issue: 15(6), P. 613 - 613

Published: March 13, 2025

The carbon cycle in terrestrial ecosystems is a crucial component of the global cycle, and drought increasingly recognized as significant stressor impacting their sink function. Net ecosystem productivity (NEP), which key indicator capacity, closely related to vegetation Primary Productivity (NPP), derived using Carnegie-Ames-Stanford Approach (CASA) model. However, there limited research on desert grassland ecosystems, offer unique insights due long-term data series. relationship between NEP complex can vary depending intensity, duration, frequency events. an exchange atmosphere, it soil respiration. Drought known negatively affect growth, reducing its ability sequester carbon, thus decreasing NEP. Prolonged conditions lead decrease NPP, turn affects overall balance ecosystems. This study employs improved CASA model, remote sensing, climate, land use estimate NPP grasslands then calculate Standardized Precipitation Evapotranspiration Index (SPEI), based precipitation evapotranspiration data, was used assess wetness dryness ecosystem, allowing for investigation drought. results show that (1) from 1982 2022, distribution pattern Inner Mongolia showed gradual increase southwest northeast, with multi-year average value 29.41 gCm⁻2. area (NEP > 0) accounted 67.99%, regional growth rate 0.2364 gcm−2yr−1, In addition, increasing 35.40% total (p < 0.05); (2) SPEI characterize changes region whole mainly affected by light Spatially, cumulative effect primarily driven short-term (1–2 months), covering 54.5% area, relatively fast response rate; (3) analyzing driving factors Geographical detector, annual had greatest influence Mongolian ecosystem. Interaction analysis revealed combined most stronger than single factor, interaction two higher explanatory power demonstrates has increased significantly drought, characterized SPEI, clear productivity, particularly areas experiencing Future could focus extending this other incorporating additional environmental variables further refine understanding dynamics under conditions. improving our cycling grasslands, are sensitive climate variability gained help inform strategies mitigating change enhancing sequestration arid regions.

Language: Английский

Spatio-Temporal Evolution of Net Ecosystem Productivity and Its Influencing Factors in Northwest China, 1982–2022 DOI Creative Commons
Weijie Zhang, Zhichao Xu, Haobo Yuan

et al.

Agriculture, Journal Year: 2025, Volume and Issue: 15(6), P. 613 - 613

Published: March 13, 2025

The carbon cycle in terrestrial ecosystems is a crucial component of the global cycle, and drought increasingly recognized as significant stressor impacting their sink function. Net ecosystem productivity (NEP), which key indicator capacity, closely related to vegetation Primary Productivity (NPP), derived using Carnegie-Ames-Stanford Approach (CASA) model. However, there limited research on desert grassland ecosystems, offer unique insights due long-term data series. relationship between NEP complex can vary depending intensity, duration, frequency events. an exchange atmosphere, it soil respiration. Drought known negatively affect growth, reducing its ability sequester carbon, thus decreasing NEP. Prolonged conditions lead decrease NPP, turn affects overall balance ecosystems. This study employs improved CASA model, remote sensing, climate, land use estimate NPP grasslands then calculate Standardized Precipitation Evapotranspiration Index (SPEI), based precipitation evapotranspiration data, was used assess wetness dryness ecosystem, allowing for investigation drought. results show that (1) from 1982 2022, distribution pattern Inner Mongolia showed gradual increase southwest northeast, with multi-year average value 29.41 gCm⁻2. area (NEP > 0) accounted 67.99%, regional growth rate 0.2364 gcm−2yr−1, In addition, increasing 35.40% total (p < 0.05); (2) SPEI characterize changes region whole mainly affected by light Spatially, cumulative effect primarily driven short-term (1–2 months), covering 54.5% area, relatively fast response rate; (3) analyzing driving factors Geographical detector, annual had greatest influence Mongolian ecosystem. Interaction analysis revealed combined most stronger than single factor, interaction two higher explanatory power demonstrates has increased significantly drought, characterized SPEI, clear productivity, particularly areas experiencing Future could focus extending this other incorporating additional environmental variables further refine understanding dynamics under conditions. improving our cycling grasslands, are sensitive climate variability gained help inform strategies mitigating change enhancing sequestration arid regions.

Language: Английский

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