Wide coverage but few quantitative data: Coarse sediments in the English Channel

Offshore Wind Farms (OWFs) in the English Channel and along the coast of Normandy (France) will be installed on coarse sediments, which cover about 80% of the seabed of the English Channel. A BACI (Before After Control Impact) approach has been recommended by the French State for each of these OWFs....

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Autores principales:	Jean-Philippe Pezy, Jean-Claude Dauvin
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Macrobenthos AMBI BO2A Ecological quality status Offshore Wind Farm Environmental impact assessment Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/a1d87ff55325442b86ecddce27b545a3
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spelling	oai:doaj.org-article:a1d87ff55325442b86ecddce27b545a32021-12-01T04:32:22ZWide coverage but few quantitative data: Coarse sediments in the English Channel1470-160X10.1016/j.ecolind.2020.107010https://doaj.org/article/a1d87ff55325442b86ecddce27b545a32021-02-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X20309493https://doaj.org/toc/1470-160XOffshore Wind Farms (OWFs) in the English Channel and along the coast of Normandy (France) will be installed on coarse sediments, which cover about 80% of the seabed of the English Channel. A BACI (Before After Control Impact) approach has been recommended by the French State for each of these OWFs. This provides the opportunity to acquire macrofauna data and assess the Ecological Quality Status in areas that are poorly sampled. In the case of the Dieppe-Le Tréport (DLT) OWF, for that, a sampling strategy was developed in 2014–2016 to establish a ‘Before’ state for the sediment and macrofauna. Results highlight that the DLT OWF project site includes three different sediment type: sandy Gravel (sG), gravelly Sand (gS) and medium Sand (mS). Taxonomic Richness and abundances are dominated by Annelids in all three habitats, followed by Arthropods and Molluscs. In terms of biomass, Molluscs (bivalves) are predominant in sG and gS, while Echinoderms and Polychaetes along with bivalves represent a high fraction of the biomass in mS. Surface Deposit Feeders are the most important group in terms of abundance, while Filter feeders largely dominate the biomass. The benthic indices based on abundances reveal a high Ecological Quality Status for the three sediment types. However, due to the predominant contribution of the bivalve Glycymeris glycymeris to the biomass, the habitat quality appears to vary from moderate to bad. In comparison with other similar habitats, the Taxonomic Richness and Abundances of coarse sediments and medium sand are in the same order of magnitude as other sites. However, the biomasses are among the highest so far recorded, reflecting the importance of this area as a hotspot of biomass in the English Channel.Jean-Philippe PezyJean-Claude DauvinElsevierarticleMacrobenthosAMBIBO2AEcological quality statusOffshore Wind FarmEnvironmental impact assessmentEcologyQH540-549.5ENEcological Indicators, Vol 121, Iss , Pp 107010- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Macrobenthos AMBI BO2A Ecological quality status Offshore Wind Farm Environmental impact assessment Ecology QH540-549.5
spellingShingle	Macrobenthos AMBI BO2A Ecological quality status Offshore Wind Farm Environmental impact assessment Ecology QH540-549.5 Jean-Philippe Pezy Jean-Claude Dauvin Wide coverage but few quantitative data: Coarse sediments in the English Channel
description	Offshore Wind Farms (OWFs) in the English Channel and along the coast of Normandy (France) will be installed on coarse sediments, which cover about 80% of the seabed of the English Channel. A BACI (Before After Control Impact) approach has been recommended by the French State for each of these OWFs. This provides the opportunity to acquire macrofauna data and assess the Ecological Quality Status in areas that are poorly sampled. In the case of the Dieppe-Le Tréport (DLT) OWF, for that, a sampling strategy was developed in 2014–2016 to establish a ‘Before’ state for the sediment and macrofauna. Results highlight that the DLT OWF project site includes three different sediment type: sandy Gravel (sG), gravelly Sand (gS) and medium Sand (mS). Taxonomic Richness and abundances are dominated by Annelids in all three habitats, followed by Arthropods and Molluscs. In terms of biomass, Molluscs (bivalves) are predominant in sG and gS, while Echinoderms and Polychaetes along with bivalves represent a high fraction of the biomass in mS. Surface Deposit Feeders are the most important group in terms of abundance, while Filter feeders largely dominate the biomass. The benthic indices based on abundances reveal a high Ecological Quality Status for the three sediment types. However, due to the predominant contribution of the bivalve Glycymeris glycymeris to the biomass, the habitat quality appears to vary from moderate to bad. In comparison with other similar habitats, the Taxonomic Richness and Abundances of coarse sediments and medium sand are in the same order of magnitude as other sites. However, the biomasses are among the highest so far recorded, reflecting the importance of this area as a hotspot of biomass in the English Channel.
format	article
author	Jean-Philippe Pezy Jean-Claude Dauvin
author_facet	Jean-Philippe Pezy Jean-Claude Dauvin
author_sort	Jean-Philippe Pezy
title	Wide coverage but few quantitative data: Coarse sediments in the English Channel
title_short	Wide coverage but few quantitative data: Coarse sediments in the English Channel
title_full	Wide coverage but few quantitative data: Coarse sediments in the English Channel
title_fullStr	Wide coverage but few quantitative data: Coarse sediments in the English Channel
title_full_unstemmed	Wide coverage but few quantitative data: Coarse sediments in the English Channel
title_sort	wide coverage but few quantitative data: coarse sediments in the english channel
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/a1d87ff55325442b86ecddce27b545a3
work_keys_str_mv	AT jeanphilippepezy widecoveragebutfewquantitativedatacoarsesedimentsintheenglishchannel AT jeanclaudedauvin widecoveragebutfewquantitativedatacoarsesedimentsintheenglishchannel
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Wide coverage but few quantitative data: Coarse sediments in the English Channel

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