气候变化领域集成服务门户(CCPortal): A coupled geomorphic and ecological model of tidal marsh evolution

CCPortal

DOI	10.1073/pnas.0700958104
	A coupled geomorphic and ecological model of tidal marsh evolution
	Kirwan M.L.; Murray A.B.
发表日期	2007
ISSN	0027-8424
起始页码	6118
结束页码	6122
卷号	104 期号:15
英文摘要	The evolution of tidal marsh platforms and interwoven channel networks cannot be addressed without treating the two-way interactions that link biological and physical processes. We have developed a 3D model of tidal marsh accretion and channel network development that couples physical sediment transport processes with vegetation biomass productivity. Tidal flow tends to cause erosion, whereas vegetation biomass, a function of bed surface depth below high tide, influences the rate of sediment deposition and slope-driven transport processes such as creek bank slumping. With a steady, moderate rise in sea level, the model builds a marsh platform and channel network with accretion rates everywhere equal to the rate of sea-level rise, meaning water depths and biological productivity remain temporally constant. An increase in the rate of sea-level rise, or a reduction in sediment supply, causes marsh-surface depths, biomass productivity, and deposition rates to increase while simultaneously causing the channel network to expand. Vegetation on the marsh platform can promote a metastable equilibrium where the platform maintains elevation relative to a rapidly rising sea level, although disturbance to vegetation could cause irreversible loss of marsh habitat. © 2007 by The National Academy of Sciences of the USA.
英文关键词	Accretion; Erosion; Sea level; Vegetation; Wetland
语种	英语
scopus关键词	article; biomass; ecology; environmental change; flood tide; geomorphology; habitat; marsh; model; priority journal; sea level; sediment transport; soil erosion; tidal marsh; tide; vegetation; watershed; Biomass; Computer Simulation; Ecosystem; Evolution; Geologic Sediments; Models, Theoretical; Plants; Time Factors; Water Movements; Wetlands
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159182
作者单位	Kirwan, M.L., Nicholas School of the Environment and Earth Sciences, Center for Nonlinear and Complex Systems, Duke University, Durham, NC 27708, United States; Murray, A.B., Nicholas School of the Environment and Earth Sciences, Center for Nonlinear and Complex Systems, Duke University, Durham, NC 27708, United States
推荐引用方式 GB/T 7714	Kirwan M.L.,Murray A.B.. A coupled geomorphic and ecological model of tidal marsh evolution[J],2007,104(15).
APA	Kirwan M.L.,&Murray A.B..(2007).A coupled geomorphic and ecological model of tidal marsh evolution.Proceedings of the National Academy of Sciences of the United States of America,104(15).
MLA	Kirwan M.L.,et al."A coupled geomorphic and ecological model of tidal marsh evolution".Proceedings of the National Academy of Sciences of the United States of America 104.15(2007).