Wetlands are important natural sources of methane. However, methane predictions are unconstrained due in part to simplified representations in biogeochemical models of complex interactions between biological components and biophysical drivers. Chang et al. (2019, https://doi.org/10.1029/2019JG005355) demonstrate how mechanistic descriptions of processes mediated by biological components and their drivers help improve methane prediction in the thawing permafrost peatlands, where biological components are shifting as a response to current climate change. These findings underscore the need for accounting for the different methanogenic pathways in biogeochemical models to predict methane cycling under a changing climate scenario. This comment presents some implications of considering the methanogenic pathways when simulating different wetland ecosystems and discusses the relevance of including other processes mediated by biological components in the methane cycle in models.

中文翻译：

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湿地甲烷循环过程中生物成分的功能表征改善了模型预测

湿地是甲烷的重要自然来源。但是，甲烷的预测不受限制，部分原因是生物地球化学模型中生物成分与生物物理驱动因素之间复杂相互作用的简化表示。Chang等。（2019，https://doi.org/10.1029/2019JG005355）演示了由生物成分及其驱动因素介导的过程的机械描述如何帮助改善融化的多年冻土泥炭地中甲烷的预测，在这些地区，生物成分正在响应当前的气候变化而变化。这些发现强调了需要考虑生物地球化学模型中不同的产甲烷途径来预测气候变化情况下的甲烷循环。