Global numerous wetlands are the most productive ecosystem and have high carbon sequestration potential to mitigate increasing CO 2 in the atmosphere. However, few are available on estimating average carbon sequestration rates by global wetlands (Carbon sq ) at century timescale. In this article, Carbon sq data of 473 wetland soil/sediment cores from the literatures were collected in detail by the meta-analysis method. These cores were no more than 300 years old and spanned a latitudinal range from 33.6° S to 69.7° N. Globally, the average Carbon sq was 185.2 g/(m 2 ·yr) regardless of wetland types. Carbon sq varied remarkably between wetland types and ranked as an order of salt marsh (247.7 g/(m 2 ·yr)) > mangrove (229.8 g/(m 2 ·yr)) > freshwater marsh (196.7 g/(m 2 ·yr)) > peatland (76.9 g/(m 2 ·yr)). Carbon sq was positively related to mean annual temperature (AMT) and annual precipitation (Pre). Nitrogen was the most common and primary factor controlling Carbon sq regardless of wetland types.

中文翻译：

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气候和养分对湿地固碳率的影响：荟萃分析

全球众多的湿地是生产力最高的生态系统，具有很高的固碳潜力，可以缓解大气中不断增加的 CO 2 。然而，在世纪时间尺度上估计全球湿地的平均碳固存率 (Carbon sq ) 的资料很少。本文通过荟萃分析方法详细收集了文献中473个湿地土壤/沉积物核心的碳平方数据。这些核心的历史不超过 300 年，跨越的纬度范围从 33.6° S 到 69.7° N。在全球范围内，无论湿地类型如何，平均碳面积为 185.2 g/(m 2 ·yr)。湿地类型之间的碳平方差异显着，排列顺序为盐沼 (247.7 g/(m 2 ·yr)) > 红树林 (229.8 g/(m 2 ·yr)) > 淡水沼泽 (196.7 g/(m 2 ·yr)) yr)) > 泥炭地 (76.9 g/(m 2 ·yr))。碳平方与年平均气温（AMT）和年降水量（Pre）呈正相关。无论湿地类型如何，氮是控制碳 sq 的最常见和主要因素。