globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.13424
论文题名:
Contrasting ecosystem CO2 fluxes of inland and coastal wetlands: a meta-analysis of eddy covariance data
作者: Lu W.; Xiao J.; Liu F.; Zhang Y.; Liu C.; Lin G.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2017
卷: 23, 期:3
起始页码: 1180
结束页码: 1198
语种: 英语
英文关键词: carbon budget ; cross-site synthesis ; ecosystem respiration ; gross primary productivity ; mangroves ; marshes ; net ecosystem productivity
Scopus关键词: Rhizophoraceae ; White tip die-back phytoplasma
英文摘要: Wetlands play an important role in regulating the atmospheric carbon dioxide (CO2) concentrations and thus affecting the climate. However, there is still lack of quantitative evaluation of such a role across different wetland types, especially at the global scale. Here, we conducted a meta-analysis to compare ecosystem CO2 fluxes among various types of wetlands using a global database compiled from the literature. This database consists of 143 site-years of eddy covariance data from 22 inland wetland and 21 coastal wetland sites across the globe. Coastal wetlands had higher annual gross primary productivity (GPP), ecosystem respiration (Re), and net ecosystem productivity (NEP) than inland wetlands. On a per unit area basis, coastal wetlands provided large CO2 sinks, while inland wetlands provided small CO2 sinks or were nearly CO2 neutral. The annual CO2 sink strength was 93.15 and 208.37 g C m−2 for inland and coastal wetlands, respectively. Annual CO2 fluxes were mainly regulated by mean annual temperature (MAT) and mean annual precipitation (MAP). For coastal and inland wetlands combined, MAT and MAP explained 71%, 54%, and 57% of the variations in GPP, Re, and NEP, respectively. The CO2 fluxes of wetlands were also related to leaf area index (LAI). The CO2 fluxes also varied with water table depth (WTD), although the effects of WTD were not statistically significant. NEP was jointly determined by GPP and Re for both inland and coastal wetlands. However, the NEP/Re and NEP/GPP ratios exhibited little variability for inland wetlands and decreased for coastal wetlands with increasing latitude. The contrasting of CO2 fluxes between inland and coastal wetlands globally can improve our understanding of the roles of wetlands in the global C cycle. Our results also have implications for informing wetland management and climate change policymaking, for example, the efforts being made by international organizations and enterprises to restore coastal wetlands for enhancing blue carbon sinks. © 2016 John Wiley & Sons Ltd
资助项目: This work was supported by the National Basic Research Program (973 program) of China (2013CB556601), Ocean Public Fund Research Project Grants of State Oceanic Adminostration, China (201205008, 201305021), the National Aeronautics and Space Administration (NASA) through the Carbon Cycle Science Program (grant # NNX14AJ18G) and the Climate Indicators and Data Products for Future National Climate Assessments (grant # NNX16AG61G), and the US National Science Foundation through the MacroSystems Biology Program in the Division of Emerging Frontiers (grant #1065777). This study was partly motivated and supported by the synthesis initiative of the US–China Carbon Consortium (USCCC). We thank the authors of the cited literature and the managers of each site for their research contributions and for providing us with unpublished data and site information. We also thank the anonymous reviewers for their constructive comments on the manuscript.
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被引频次[WOS]:102   [查看WOS记录]     [查看WOS中相关记录]
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61041
Appears in Collections:影响、适应和脆弱性

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作者单位: National Marine Environmental Monitoring Center, State Oceanic Administration, Dalian, China; Earth Systems Research Center, Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, Durham, NH, United States; Ministry of Education Key Laboratory for Earth System Modeling, Center for Earth System Science, Tsinghua University, Beijing, China; Division of Ocean Science and Technology, Graduate School at Shenzhen, Tsinghua University, Shenzhen, China

Recommended Citation:
Lu W.,Xiao J.,Liu F.,et al. Contrasting ecosystem CO2 fluxes of inland and coastal wetlands: a meta-analysis of eddy covariance data[J]. Global Change Biology,2017-01-01,23(3)
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