A coupled geomorphic and ecological model of tidal marsh evolution.

ABSTRACT: 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 temp

SUBMITTER: Kirwan ML 

PROVIDER: S-EPMC1851060 | biostudies-literature | 2007 Apr

REPOSITORIES: biostudies-literature