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. 2018 Feb 6;9:98. doi: 10.3389/fpls.2018.00098

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Copyright © 2018 Redelstein, Dinter, Hertel and Leuschner.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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(A) Map of the German North Sea coast with the location of the two study sites Spiekeroog Island and Westerhever and location of the sampling plots in the three saltmarsh zones pioneer zone (Pio), lower salt marsh (Low), and upper salt marsh (Upp). Detail maps: Tümlau Bight in Westerhever (a) and south side of Spiekeroog Island (b). “‘T’ marks the location of the tide gauge station” from which water level data for Westerhever were obtained (Service layer Credits: Esri, DeLorme, GEBCO, NOAA NGDB, and other contributors, Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS User Community). (B) Zonation of a salt marsh with elevations relative to the mean high tide (MHT) water level and species typically inhabiting the three zones in a north-west European salt marsh.