دورية أكاديمية
Using the dynamics of productivity and precipitation-use efficiency to detect state transitions in Eurasian grasslands
| العنوان: | Using the dynamics of productivity and precipitation-use efficiency to detect state transitions in Eurasian grasslands |
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| المؤلفون: | Tianyou Zhang, Zhi Chen, Cuicui Jiao, Weikang Zhang, Lang Han, Zheng Fu, Zhongyi Sun, Zhaogang Liu, Zhongming Wen, Guirui Yu |
| المصدر: | Frontiers in Ecology and Evolution, Vol 11 (2023) |
| بيانات النشر: | Frontiers Media S.A., 2023. |
| سنة النشر: | 2023 |
| المجموعة: | LCC:Evolution LCC:Ecology |
| مصطلحات موضوعية: | Eurasian grasslands, precipitation-use efficiency, productivity, regime shift, state transitions, Evolution, QH359-425, Ecology, QH540-549.5 |
| الوصف: | In the face of accelerated global dryland expansion and grassland degradation, signaling grassland ecosystem state transitions is an ongoing challenge in ecology. However, there is still a lack of effective indicators and understanding of the mechanisms of grassland ecosystem state transitions at the continental scale. Here, we propose a framework that links ecosystem function-based indicators and critical slowing down (CSD) theory to reveal grassland state transitions. Across precipitation gradients, we quantified the statistical characteristics and spatial patterns in ANPP and PUE dynamics (variability, asymmetry, and sensitivity to precipitation and temperature) in Eurasian grasslands. We show that the CVANPP, CVPUE, AANPP, APUE, SPUE-P, and SANPP-P of temperate steppes were significantly higher than those of alpine steppes, while the SPUE-T and SANPP-T were the inverse. In temperate grasslands, AANPP, APUE, and SANPP-P indicated the transition of typical steppes, and CVANPP, APUE, and SPUE-T indicated the transition from meadow to typical steppes. In alpine grasslands, APUE indicated the transition between alpine deserts and alpine steppes, and AANPP and SANPP-P indicated the transition between alpine steppes and meadow steppes. The interannual variability of precipitation strongly affected xerophyte proportion and demographic processes, which control state transitions in low-resilience grasslands. Community structures and limiting factors (nutrient, light, and/or temperature) regulate state transitions in high-resilience grasslands. Our results demonstrate that function-based indicators are predictive of impending state transitions of temperate and alpine grasslands, highlighting the complementation of ANPP and PUE dynamics that have the potential for predicting grassland ecosystem regime shifts and their underlying mechanisms. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2296-701X |
| Relation: | https://www.frontiersin.org/articles/10.3389/fevo.2023.1189059/full; https://doaj.org/toc/2296-701X |
| DOI: | 10.3389/fevo.2023.1189059 |
| URL الوصول: | https://doaj.org/article/a3986fc751f449fa926a4a528053e6fd |
| رقم الأكسشن: | edsdoj.3986fc751f449fa926a4a528053e6fd |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 2296701X |
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| DOI: | 10.3389/fevo.2023.1189059 |