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Enrichment and shifts in macrobenthic assemblages in an offshore wind farm area in the Belgian part of the North Sea Coates, D.; Deschutter, Y.; Vincx, M.; Vanaverbeke, J. (2014). Enrichment and shifts in macrobenthic assemblages in an offshore wind farm area in the Belgian part of the North Sea. Mar. Environ. Res. 95: 1-12. https://dx.doi.org/10.1016/j.marenvres.2013.12.008 In: Marine Environmental Research. Applied Science Publishers: Barking. ISSN 0141-1136; e-ISSN 1879-0291

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Beschikbaar in	Auteurs
VLIZ: Open Marine Archive 313842 [ download pdf ]

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Trefwoorden

Aquatic communities > Benthos Composition > Community composition Environmental impact Resources > Natural resources > Energy resources > Wind power Small scale Lanice conchilega (Pallas, 1766) [WoRMS] ANE, België [Marine Regions]; ANE, Noordzee [Marine Regions] Marien/Kust

Author keywords

Benthic ecology; Permeable sediments

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Auteurs		Top
Coates, D. Deschutter, Y. Vincx, M. Vanaverbeke, J.

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Abstract

The growing development of offshore wind energy installations across the North Sea is producing new hard anthropogenic structures in the natural soft sediments, causing changes to the surrounding macrobenthos. The extent of modification in permeable sediments around a gravity based wind turbine in the Belgian part of the North Sea was investigated in the period 2011 – 2012, along four gradients (south-west, north-east, south-east, north-west). Sediment grain size significantly reduced from 427 µm at 200 m to 312 ± 3 µm at 15 m from the foundation along the south-west and north-west gradients. The organic matter content increased from 0.4 ± 0.01% at 100 m to 2.5 ± 0.9% at 15 m from the foundation. The observed changes in environmental characteristics triggered an increase in the macrobenthic density from 1390 ± 129 ind m-2 at 200 m to 18 583 ± 6713 ind m-2 at 15 m together with an enhanced diversity from 10 ± 2 at 200 m to 30 ± 5 species per sample at 15 m. Shifts in species dominance were also detected with a greater dominance of the ecosystem-engineer Lanice conchilega (16–25%) close to the foundation. This study suggests a viable prediction of the effects offshore wind farms could create to the naturally occurring macrobenthos on a large-scale.

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