Persons | Marinebiotech

marinebiotech.eu/persons?module=ref&refid=332284

Persons

[ report an error in this record ]basket (0): add | show Print this page

Coastal marsh degradation into ponds induces irreversible elevation loss relative to sea level in a microtidal system
Schepers, L.; Brennand, P.; Kirwan, M.L.; Guntenspergen, G.R.; Temmerman, S. (2020). Coastal marsh degradation into ponds induces irreversible elevation loss relative to sea level in a microtidal system. Geophys. Res. Lett. 47(18): e2020GL089121. https://dx.doi.org/10.1029/2020gl089121
In: Geophysical Research Letters. American Geophysical Union: Washington. ISSN 0094-8276; e-ISSN 1944-8007
Peer reviewed article  

Available in  Authors 

Author keywords
    pond expansion; marsh degradation; sealevel rise

Authors  Top 
  • Schepers, L.
  • Brennand, P.
  • Kirwan, M.L.
  • Guntenspergen, G.R.
  • Temmerman, S.

Abstract
    Coastal marshes and their valuable ecosystem services are feared to be lost by sea level rise, yet the mechanisms of marsh degradation into ponds and potential recovery are poorly understood. We quantified and analyzed elevations of marsh surfaces and pond bottoms along a marsh loss gradient (Blackwater River, Maryland, USA). Our analyses show that ponds deepen with increasing tidal channel width connecting the ponds to the river, indicating a new feedback mechanism where channels lead to enhanced tidal export of pond bottom material. Pond elevations also decrease with increasing pond size, consistent with previous work identifying a positive feedback between wind wave erosion and pond size. These two positive feedbacks, combined with bimodal elevation distributions and sharp topographic boundaries between interior ponds and the marsh platform, indicate alternative elevation states and imply that marsh loss by pond formation is nearly irreversible once pond deepening exceeds a critical level.

All data in the Integrated Marine Information System (IMIS) is subject to the VLIZ privacy policy Top | Authors