温室气体
蓝炭
生态系统
环境科学
碳纤维
环境保护
生态学
渔业
生物
材料科学
海草
复合数
复合材料
作者
Kai Xiao,Yu-Chen Wu,Feng Pan,Yajuan Huang,He‐Bo Peng,Xiaojun Niu,Yan Zhang,Hailong Li,Yan Zheng,Chunmiao Zheng,Y. Liu,Nengwang Chen,Leilei Xiao,Guangxuan Han,Yasong Li,Pei Xin,Ruili Li,Bochao Xu,Faming Wang,Joseph Tamborski,Alicia M. Wilson,Daniel M. Alongi,Isaac R. Santos
标识
DOI:10.1038/s43247-024-01621-2
摘要
Fiddler crabs, as coastal ecosystem engineers, play a crucial role in enhancing biodiversity and accelerating the flow of material and energy. Here we show how widespread crab burrows modify the carbon sequestration capacity of different habitats across a large climatic gradient. The process of crab burrowing results in the reallocation of sediment organic carbon and humus. Crab burrows can increase more greenhouse gases emissions compared to the sediment matrix (CO2: by 17–30%; CH4: by 49–141%). Straightforward calculations indicate that these increased emissions could offset 35–134% of sediment carbon burial in these two ecosystems. This research highlights the complex interactions between crab burrows, habitat type, and climate which reveal a potential lower carbon sink function of blue carbon ecosystems than previously expected without considering crab burrows. Bioturbation in wetlands can increase carbon dioxide and methane emissions, partially offsetting their sediment carbon burial capacity, according to a large-scale data set from sediment samples collected along the Chinese coastline and laboratory incubations.
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