Abstract
Global numerous wetlands are the most productive ecosystem and have high carbon sequestration potential to mitigate increasing CO2 in the atmosphere. However, few are available on estimating average carbon sequestration rates by global wetlands (Carbonsq) at century timescale. In this article, Carbonsq 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 Carbonsq was 185.2 g/(m2·yr) regardless of wetland types. Carbonsq varied remarkably between wetland types and ranked as an order of salt marsh (247.7 g/(m2·yr)) > mangrove (229.8 g/(m2·yr)) > freshwater marsh (196.7 g/(m2·yr)) > peatland (76.9 g/(m2·yr)). Carbonsq was positively related to mean annual temperature (AMT) and annual precipitation (Pre). Nitrogen was the most common and primary factor controlling Carbonsq regardless of wetland types.
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Foundation item: Under the auspices of the National Natural Science Foundation of China (Nos. U19A2042, 41471081, 41671081, 41671087), the National Key Research and Development Program of China (Nos. 2017YFC0505901, 2016YFC050040106, 2016YFA060230302), the Youth Innovation Promotion Association, Chinese Acadmy of Sciences (No. 2018265)
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Cheng, C., Li, M., Xue, Z. et al. Impacts of Climate and Nutrients on Carbon Sequestration Rate by Wetlands: A Meta-analysis. Chin. Geogr. Sci. 30, 483–492 (2020). https://doi.org/10.1007/s11769-020-1122-3
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DOI: https://doi.org/10.1007/s11769-020-1122-3