An appraisal of global wetland area and its organic carbon stock
An appraisal of global wetland area and its organic carbon stock
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DOI：
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发表时间：
2005
期刊：
影响因子：
1
通讯作者：
S. Mitra;R. Wassmann;P. Vlek
中科院分区：
文献类型：
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作者：
S. Mitra;R. Wassmann;P. Vlek
湿地是地球上最重要的自然资源之一。它们是文化、经济和生物多样性的源泉。由于其丰富的碳储存，湿地为大气碳提供了潜在的汇，但如果管理不当，可能成为二氧化碳和甲烷等温室气体（GHG）的来源。两个重要的长期不确定性在科学界引发了许多争论。这些数据包括全球湿地面积及储存于湿地的碳量。编制相关数据库，有助制订湿地保育的长远策略。很难估计湿地的净固碳潜力，因为有机物的分解速度和产甲烷微生物的丰度以及沉积物的通量极其复杂，而且相关科学知识往往存在空白。目前对全球湿地土壤有机碳密度分布的讨论可能有助于制定有效的湿地生态系统固碳和减少温室气体排放的战略。只有当所有利益攸关方都能获得和使用现有信息时，才能对湿地进行有效评估。
Wetlands are among the most important natural resources on earth. They are the sources of cultural, economic and biological diversity. With their wealth of stored carbon, wetlands provide a potential sink for atmospheric carbon, but if not managed properly could become sources of greenhouse gases (GHGs) such as carbon dioxide and methane. Two important long-term uncertainties have initiated much debate in the scientific community. These are global wetland area and the amount of carbon stored in it. Compilation of relevant databases could be useful in setting up a long-term strategy for wetland conservation. It has been difficult to estimate the net carbon sequestration potential of a wetland, because the rate of decomposition of organic matter and the abundance of methanogenic micro-organisms and fluxes from the sediment are extremely complex, and there are often gaps in relevant scientific knowledge. The present discussion on density distribution of soil organic C in global wetlands could well be instrumental in formulating efficient strategies related to carbon sequestration and reduction of GHG emissions in wetland ecosystems. Effective assessment of wetlands will only take place when the available information becomes accessible and usable for all stakeholders.