气候变化领域集成服务门户(CCPortal): A physical-biogeochemical mechanism for negative feedback between marsh crabs and carbon storage

CCPortal

DOI	10.1088/1748-9326/ab60e2
	A physical-biogeochemical mechanism for negative feedback between marsh crabs and carbon storage
	Guimond J.A.; Seyfferth A.L.; Moffett K.B.; Michael H.A.
发表日期	2020
ISSN	17489318
卷号	15 期号:3
英文摘要	Tidal marshes are valuable global carbon sinks, yet large uncertainties in coastal marsh carbon budgets and mediating mechanisms limit our ability to estimate fluxes and predict feedbacks with global change. To improve mechanistic understanding, we assess how net carbon storage is influenced by interactions between crab activity, water movement, and biogeochemistry. We show that crab burrows enhance carbon loss from tidal marsh sediments by physical and chemical feedback processes. Burrows increase near-creek sediment permeability in the summer by an order of magnitude compared to the winter crab dormancy period, promoting carbon-rich fluid exchange between the marsh and creek. Burrows also enhance vertical exchange by increasing the depth of the strongly carbon-oxidizing zone and reducing the capacity for carbon sequestration. Results reveal the mechanism through which crab burrows mediate the movement of carbon through tidal wetlands and highlight the importance of considering burrowing activity when making budget projections across temporal and spatial scales. © 2020 The Author(s). Published by IOP Publishing Ltd.
英文关键词	bioturbation; blue carbon; climate change; coastal hydrogeology; coastal wetland; permeability
语种	英语
scopus关键词	Biogeochemistry; Budget control; Climate change; Forestry; Groundwater; Hydrogeology; Mechanical permeability; Sediments; Uncertainty analysis; Bioturbation; Carbon sequestration; Coastal wetlands; Feedback process; Sediment permeability; Temporal and spatial scale; Tidal wetlands; Water movements; Wetlands; biogeochemical cycle; bioturbation; carbon sink; carbon storage; climate change; coastal wetland; coastal zone; crab; feedback mechanism; global change; hydrogeology; marsh; net ecosystem exchange; permeability; physical analysis; Decapoda (Crustacea); Grapsidae
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154215
作者单位	Department of Geological Sciences, University of Delaware, Newark, DE 19716, United States; Department of Plant and Soil Sciences, University of Delaware, Newark, DE 19716, United States; School of the Environment, Washington State University, Vancouver, WA 98686, United States; Department of Civil and Environmental Engineering, University of Delaware, Newark, DE 19716, United States
推荐引用方式 GB/T 7714	Guimond J.A.,Seyfferth A.L.,Moffett K.B.,et al. A physical-biogeochemical mechanism for negative feedback between marsh crabs and carbon storage[J],2020,15(3).
APA	Guimond J.A.,Seyfferth A.L.,Moffett K.B.,&Michael H.A..(2020).A physical-biogeochemical mechanism for negative feedback between marsh crabs and carbon storage.Environmental Research Letters,15(3).
MLA	Guimond J.A.,et al."A physical-biogeochemical mechanism for negative feedback between marsh crabs and carbon storage".Environmental Research Letters 15.3(2020).