The Decline and Restoration of a Coastal Lagoon (Lake Veere) in the Dutch Delta |
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| Authors: | Sander Wijnhoven Vincent Escaravage Eugène Daemen Herman Hummel |
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| Institution: | (1) Monitor Taskforce, Netherlands Institute of Ecology, Centre for Estuarine and Marine Ecology (NIOO-CEME), Korringaweg 7, P. O. Box 140, 4401, NT, Yerseke, The Netherlands;(2) Ministry of Transport, Public Works and Water Management, RWS Directorate Zeeland, Poelendaelesingel 18, P. O. Box 5014, 4330, KA, Middelburg, The Netherlands |
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| Abstract: | The former tidal inlet Lake Veere was turned into a stagnant brackish lake in 1961. Ever since, the system has shown a continuous
degradation. The current study shows the monitoring results for the macrozoobenthic communities and the abiotic conditions
for the period 1990–2008. This includes the first step to remediation, the restoration of the exchange between the tidal marine
Eastern Scheldt and Lake Veere in 2004. A continuous decline in water clearance co-occurring with decreasing macrofauna densities
and richness was observed till 2004. Water quality (e.g., secchi depth, nutrient levels, and oxygen conditions) improved significantly
after the measure at a higher salinity level with less variation. But the macrofauna densities, biomass, and diversity did
not improve yet. First indications of changes in the benthic communities by arrival of new and returning species are however
observed and show that restoration at macrofauna level follows the improved abiotic conditions with a delay of several years. |
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