Bedrock mediates responses of ecosystem productivity to climate variability

Bedrock mediates responses of ecosystem productivity to climate variability
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基岩介导生态系统生产力对气候变化的反应

DOI:
10.1038/s43247-023-00773-x
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发表时间:
2023
影响因子:
7.9
通讯作者:
Tu, Tongbi
Tu, Tongbi
中科院分区:
环境科学与生态学2区
文献类型:
--
作者:
Dong, Xiaoli;Martin, Jonathan B.;Cohen, Matthew J.;Tu, Tongbi

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生态系统生产力对气候变化的敏感性是生态系统对气候变化适应能力的重要组成部分。生态系统敏感度的变化受许多变量的影响。在这里,我们使用贝叶斯统计模型研究了基岩岩性和风化产物对生态系统生产力对气候缺水变化的敏感性的影响。三分之二的陆地生态系统表现出负敏感性,生产力随着气候缺水的增加而下降,而另外三分之一表现出正敏感性。风化层孔隙度、渗透率、风化层和土层厚度对生态系统敏感度的变化有显著影响,表明岩性通过控制持水能力对生态系统敏感度起重要控制作用。在考虑了这四个变量的影响后,不同岩石类型的生态系统之间的敏感性仍然存在显著差异,表明基岩效应的复杂性。我们的分析表明,浮冰影响了全球生态系统对气候变化的敏感性,从而影响了它们的弹性。
Sensitivity of ecosystem productivity to climate variability is a critical component of ecosystem resilience to climate change. Variation in ecosystem sensitivity is influenced by many variables. Here we investigate the effect of bedrock lithology and weathering products on the sensitivity of ecosystem productivity to variation in climate water deficit using Bayesian statistical models. Two thirds of terrestrial ecosystems exhibit negative sensitivity, where productivity decreases with increased climate water deficit, while the other third exhibit positive sensitivity. Variation in ecosystem sensitivity is significantly affected by regolith porosity and permeability and regolith and soil thickness, indicating that lithology, through its control on water holding capacity, exerts important controls on ecosystem sensitivity. After accounting for effects of these four variables, significant differences in sensitivity remain among ecosystems on different rock types, indicating the complexity of bedrock effects. Our analysis suggests that regolith affects ecosystem sensitivity to climate change worldwide and thus their resilience.
DOI: 10.1038/s42003-022-03573-9
发表时间: 2022-06-27
影响因子: 5.9
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