Publication
Title
Vegetation controls on channel network complexity in coastal wetlands
Author
Abstract
Channel networks are key to coastal wetland functioning and resilience under climate change. Vegetation affects sediment and hydrodynamics in many different ways, which calls for a coherent framework to explain how vegetation shapes channel network geometry and functioning. Here, we introduce an idealized model that shows how coastal wetland vegetation creates more complexly branching networks by increasing the ratio of channel incision versus topographic diffusion rates, thereby amplifying the channelization feedback that recursively incises finer-scale side-channels. This complexification trend qualitatively agrees with and provides an explanation for field data presented here as well as in earlier studies. Moreover, our model demonstrates that a stronger biogeomorphic feedback leads to higher and more densely vegetated marsh platforms and more extensive drainage networks. These findings may inspire future field research by raising the hypothesis that vegetation-induced self-organization enhances the storm surge buffering capacity of coastal wetlands and their resilience under sea-level rise. Channel networks are key to coastal wetland functioning. Here, the authors show how vegetation enhances network branching, and hypothesize that this may enhance the storm surge buffering capacity of wetlands and their resilience under sea-level rise.
Language
English
Source (journal)
Nature communications
Publication
2023
ISSN
2041-1723
DOI
10.1038/S41467-023-42731-3
Volume/pages
14 :1 (2023) , p. 1-14
Article Reference
7158
ISI
001103881600017
Pubmed ID
37935673
Full text (Publisher's DOI)
Full text (open access)
UAntwerpen
Faculty/Department
Research group
Project info
Coastal marsh resilience to sea level rise: a field, flume and modelling study on the role of bio-geomo hic self-organization.
Tidal marshes: bio-geomorphic self-organization and its implications for resilience to sea level rise and changing sediment supply (TIGER).
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identifier
Creation 01.02.2024
Last edited 07.02.2024
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