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Consequences of a tidal reduction for the salt-marsh vegetation in the Oosterschelde estuary (The Netherlands) de Jong, D.J.; van der Pluijm, A.M. (1994). Consequences of a tidal reduction for the salt-marsh vegetation in the Oosterschelde estuary (The Netherlands). Hydrobiologia 282: 317-333. https://dx.doi.org/10.1007/BF00024639 In: Hydrobiologia. Springer: The Hague. ISSN 0018-8158; e-ISSN 1573-5117, meer Is gerelateerd aan: de Jong, D.J.; van der Pluijm, A.M. (1994). Consequences of a tidal reduction for the salt-marsh vegetation in the Oosterschelde estuary (The Netherlands), in: Nienhuis, P.H. et al. The Oosterschelde Estuary (The Netherlands): A case-study of a changing ecosystem. Developments in Hydrobiology, 97: pp. 317-333. https://dx.doi.org/10.1007/978-94-011-1174-4_24, meer

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Beschikbaar in	Auteurs
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Trefwoorden

Communities Separation > Desiccation Vegetation Marien/Kust; Brak water

Author keywords

Salt marsh; Tidal reduction; Eastern scheldt; Oosterschelde (nl)

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Auteurs		Top
de Jong, D.J., meer van der Pluijm, A.M., meer

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Abstract

A storm-surge barrier was constructed in the mouth of the Oosterschelde, a euhaline mesotidal estuary in the SW Netherlands (mean tidal range 3.6 m). As a consequence, the tidal range and the Mean High Water in the estuary have been reduced to about 88% of their original values. During the final construction stage of this barrier (1986-87) both were reduced to a maximum of 65% for more than 18 months. During this period, large-scale die-back of the vegetation occurred in vast areas on the salt marshes; locally, a complete die-back of the vegetation took place. Glycophytes and disturbance indicating species appeared on a large scale and grew abundantly. After the new tidal regime had been established, the vegetation recovered. The species characteristic of disturbance, are gradually being replaced by perennial salt marsh species. In addition, most species are shifting into zones of lower elevation, which correspond (in 1990/1991) more or less with the original flooding frequencies. Moreover, in many basins the 'levee'-species Halimione portulacoides and Elymus pycnanthus are far more prominent than before, probably as a result of the strong ripening of the soil that has occurred in these basins during the extra tidal reduction. In 1991, four years after the establishment of the new tidal regime, the salt marsh vegetation had still not been stabilized.

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