Global patterns of geo-ecological controls on the response of soil respiration to warming
Global patterns of geo-ecological controls on the response of soil respiration to warming
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DOI：
10.1038/s41558-021-01068-9
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发表时间：
2021-06-03
影响因子：
30.7
通讯作者：
Doetterl, Sebastian
中科院分区：
文献类型：
--
作者：
Haaf, David;Six, Johan;Doetterl, Sebastian
虽然已知土壤呼吸受一系列生物和非生物因素控制，但其在全球模式中的温度敏感性在很大程度上与气候参数有关。在这里，我们表明，土壤呼吸的温度敏感性主要是由相互作用的土壤性质，只有次要的植被性状和植物生长条件。温度没有被确定为土壤呼吸对变暖反应的主要驱动因素。相比之下，非线性和大的空间变异性确定的控制压力的重要性，土壤，植被和气候参数之间的相互作用，在控制变暖的反应。全球模型可能预测当前的土壤呼吸，但不能预测未来的速率，因为它们忽略了土壤发育所施加的控制。为了准确预测土壤呼吸对全球变暖的响应，需要对不同土壤类型进行更多的观测研究，而不是仅仅关注变暖的孤立效应，了解土壤呼吸的温度敏感性对于确定气候变化下的土壤碳动态至关重要。控制的空间异质性突出了植被，土壤和气候之间的相互作用在驱动呼吸变暖的反应的重要性。
While soil respiration is known to be controlled by a range of biotic and abiotic factors, its temperature sensitivity in global models is largely related to climate parameters. Here, we show that temperature sensitivity of soil respiration is primarily controlled by interacting soil properties and only secondarily by vegetation traits and plant growth conditions. Temperature was not identified as a primary driver for the response of soil respiration to warming. In contrast, the nonlinearity and large spatial variability of identified controls stress the importance of the interplay among soil, vegetation and climate parameters in controlling warming responses. Global models might predict current soil respiration but not future rates because they neglect the controls exerted by soil development. To accurately predict the response of soil respiration to warming at the global scale, more observational studies across pedogenetically diverse soils are needed rather than focusing on the isolated effect of warming alone.Understanding the temperature sensitivity of soil respiration is critical to determining soil carbon dynamics under climate change. Spatial heterogeneity in controls highlights the importance of interactions between vegetation, soil and climate in driving the response of respiration to warming.