DOI: 10.1073/pnas.0700958104
论文题名: A coupled geomorphic and ecological model of tidal marsh evolution
作者: Kirwan M.L. ; Murray A.B.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2007
卷: 104, 期: 15 起始页码: 6118
结束页码: 6122
语种: 英语
英文关键词: Accretion
; Erosion
; Sea level
; Vegetation
; Wetland
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
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/162471
Appears in Collections: 气候变化与战略
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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
Recommended Citation:
Kirwan M.L.,Murray A.B.. A coupled geomorphic and ecological model of tidal marsh evolution[J]. Proceedings of the National Academy of Sciences of the United States of America,2007-01-01,104(15)