The Sea-defence Function Of Micro-tidal
Temperate Coastal Wetlands
Author(s)
I. Möller, J. Lendzion, T. Spencer, A. Hayes & S. Zerbe
Abstract
Global environmental change poses a growing challenge for the management of
low-lying coastal environments. The challenge is to (a) recognise and quantify
the ecological functions of such environments, and (b) develop management
approaches that allow those functions to be maintained in the context of global
change. Meeting this challenge is particularly important on micro-tidal
shorelines, where the ecological sensitivity to sea level rise and changing
climatic conditions (e.g. storm frequency and intensity) is likely to be high.
This study addresses the need to quantify the wave-dissipating function of
these types of coastal wetland. Previous studies have focused on tidal coasts and
salt marsh or mangrove vegetation and have highlighted relationships between
coastal wetland vegetation type, water depths, and observed wave energy
reduction. Prior to this study, however, no data was available on the sea-defence
function of coastal grasslands and reed beds, where irregular inundation by
meteorologically driven storm surges dominates over tidal inundation.
Results are presented of wave and vegetation monitoring along three crossshore
transects at the fringes of reed beds and coastal brackish grasslands on the
German Baltic shoreline. The data highlight significant differences in the seadefence
function of these two types of micro-tidal coastal habitat, highlighting
important differences in the likely response to future climatic (and sea level)
changes and raising questions around how these functions might be maintained,
enhanced, or restored in the context of environmental change.
Keywords: sea level rise, wave dissipation, baltic coastal wetlands, coastal
management.
Keywords
sea level rise, wave dissipation, baltic coastal wetlands, coastal
management
Related Book
Other papers in this volume
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