Anthropogenic disturbance exacerbates resilience loss in the Amazon rainforests

Author:

Wang Huan123ORCID,Ciais Philippe3ORCID,Sitch Stephen4ORCID,Green Julia K.5ORCID,Tao Shengli1ORCID,Fu Zheng3ORCID,Albergel Clément6ORCID,Bastos Ana7ORCID,Wang Mengjia8ORCID,Fawcett Dominic49ORCID,Frappart Frédéric2ORCID,Li Xiaojun2ORCID,Liu Xiangzhuo2ORCID,Li Shuangcheng1ORCID,Wigneron Jean‐Pierre2ORCID

Affiliation:

1. College of Urban and Environmental Sciences Peking University Beijing China

2. INRAE, UMR1391 ISPA Université de Bordeaux Villenave d'Ornon France

3. Laboratoire des Sciences du Climat et de l'Environnement CEA/CNRS/UVSQ/Université Paris Saclay Gif‐sur‐Yvette France

4. College of Life and Environmental Sciences University of Exeter Exeter UK

5. Department of Environmental Science The University of Arizona Tucson Arizona USA

6. European Space Agency Climate Office ECSAT Didcot UK

7. Department of Biogeochemical Integration Max Planck Institute for Biogeochemistry Jena Germany

8. School of Geoscience and Technology Zhengzhou University Zhengzhou China

9. Swiss Federal Institute for Forest Snow and Landscape Research WSL Birmensdorf Switzerland

Abstract

AbstractUncovering the mechanisms that lead to Amazon forest resilience variations is crucial to predict the impact of future climatic and anthropogenic disturbances. Here, we apply a previously used empirical resilience metrics, lag‐1 month temporal autocorrelation (TAC), to vegetation optical depth data in C‐band (a good proxy of the whole canopy water content) in order to explore how forest resilience variations are impacted by human disturbances and environmental drivers in the Brazilian Amazon. We found that human disturbances significantly increase the risk of critical transitions, and that the median TAC value is ~2.4 times higher in human‐disturbed forests than that in intact forests, suggesting a much lower resilience in disturbed forests. Additionally, human‐disturbed forests are less resilient to land surface heat stress and atmospheric water stress than intact forests. Among human‐disturbed forests, forests with a more closed and thicker canopy structure, which is linked to a higher forest cover and a lower disturbance fraction, are comparably more resilient. These results further emphasize the urgent need to limit deforestation and degradation through policy intervention to maintain the resilience of the Amazon rainforests.

Funder

National Natural Science Foundation of China

Publisher

Wiley

Subject

General Environmental Science,Ecology,Environmental Chemistry,Global and Planetary Change

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