Climate-driven disturbances amplify forest drought sensitivity

Meng Liu (), Anna T. Trugman, Josep Peñuelas and William R. L. Anderegg
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Meng Liu: University of Utah
Anna T. Trugman: University of California
Josep Peñuelas: CREAF
William R. L. Anderegg: University of Utah

Nature Climate Change, 2024, vol. 14, issue 7, 746-752

Abstract: Abstract Forests are a major terrestrial carbon sink, but the increasing frequency and intensity of climate-driven disturbances such as droughts, fires and biotic agent outbreaks is threatening carbon uptake and sequestration. Determining how climate-driven disturbances may alter the capacity of forest carbon sinks in a changing climate is crucial. Here we show that the sensitivity of gross primary productivity to subsequent water stress increased significantly after initial drought and fire disturbances in the conterminous United States. Insect outbreak events, however, did not have significant impacts. Hot and dry environments generally exhibited increased sensitivity. Estimated ecosystem productivity and terrestrial carbon uptake decreased markedly with future warming scenarios due to the increased sensitivity to water stress. Our results highlight that intensifying disturbance regimes are likely to further impact forest sustainability and carbon sequestration, increasing potential risks to future terrestrial carbon sinks and climate change mitigation.

Date: 2024
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DOI: 10.1038/s41558-024-02022-1

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