Mapping benthic communities: An indispensable tool for the preservation and management of the eco-socio-system in the Bay of Seine

Baffreau, Alexandrine; Pezy, Jean‐Philippe; Dancie, Chloé; Chouquet, Bastien; Hacquebart, Pascal; Poisson, Emeline; Foveau, Aurélie; Joncourt, Yann; Duhamel, Solange; Navon, Maxime; Marmin, Stella; Dauvin, Jean–Claude

doi:10.1016/j.rsma.2016.12.005

Cited by 12 publications

(7 citation statements)

References 24 publications

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“…Similar to Ensis leei, the tubicolous polychaete Melinna palmata was first recorded in 2002 in the eastern Bay of Seine (Dauvin et al, 2007) and reached maximum densities of 298 ind.m -2 in 2011 in response to the siltation of the bay. Ranked amongst the 10 most abundant taxa since 2011, Melinna palmata has not significantly altered the community structure nor its spatial organization over the last three decades even if, in a recent description of benthic habitats in the Bay of Seine, Baffreau et al (2017) have described a "Melinna palmata sandy mud community" defined as a very muddy facies of the Abra alba muddy fine sand community. Indeed, although the sediment type and consequently the silt content had a significant effect on the structure of the community, its role was minor over the last three decades.…”

Section: Mechanisms Involved In the Long-term Persistence Of The Communitymentioning

confidence: 99%

“…Macrobenthic communities in the Bay of Seine were first described from data collected during early 1970s (Cabioch and Gentil, 1975;Gentil and Cabioch, 1997) which identified seven macrobenthic communities in relation to the spatial distribution of the sediment substrates: (1) the coarse gravel and pebbles community, (2) the sandy gravels and gravels community, (3) the Branchiostoma lanceolatum coarse sand community, (4) the Ophelia borealis -Nephtys cirrosa fine and medium clean sands community, (5) the Abra alba -Lagis koreni muddy fine sand community, (6) the heterogenous muddy mixed community and (7) the Limecola balthica community in estuarine muddy fine sand and mud. Since these pioneering works, studies on the Abra alba -Lagis koreni muddy fine sand community in the eastern part of the Bay of Seine showed that the community was distinctly structured in space with patchy distribution of most dominant species and the identification of distinct faunal assemblages (Thiébaut et al, 1997;Baffreau et al, 2017;Dauvin et al, 2017). Thiébaut et al (1997) demonstrated that the spatial structure of the community resulted from the combination of several environmental gradients related to salinity, sediment grain size and food supply.…”

Section: Introductionmentioning

confidence: 99%

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Long-term spatio-temporal changes of the muddy fine sand benthic community of the Bay of Seine (eastern English Channel)

Bacouillard

Baux

Dauvin

et al. 2020

Marine Environmental Research

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In the English Channel, the eastern Bay of Seine is exposed to numerous anthropogenic disturbances, in particular major changes in sediment dynamics, which are expected to greatly impact benthic communities. To assess the long-term effects of these stressors on the muddy fine sand benthic community, an original long-term monitoring program has been implemented since 1988. It is based on the sampling of a network of 60 stations during seven surveys over 28 years from 1988 to 2016. We investigate changes of species abundance, species composition and species diversity at different scales (α-diversity, β-diversity and γ-diversity). Contrary to results obtained in many coastal areas, our results showed a long-term persistence of the community in terms of species composition and structure although a general shift towards muddy sediment have resulted in increased colonisation by species associated with muddy habitats and a decrease in spatial beta diversity. Highlights► The community structure was highly persistent over the last three decades. ► Silting-up promoted changes in species composition and a decrease in β-diversity. ► Community stability differed according to the scale of observation. ► There is a need to implement a sampling strategy combining different scales.Please note that this is an author-produced PDF of an article accepted for publication following peer review. The definitive publisher-authenticated version is available on the publisher Web site.

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Section: Mechanisms Involved In the Long-term Persistence Of The Communitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Long-term spatio-temporal changes of the muddy fine sand benthic community of the Bay of Seine (eastern English Channel)

Bacouillard

Baux

Dauvin

et al. 2020

Marine Environmental Research

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“…Location of the Courseulles-sur-Mer future offshore wind farm (which corresponds to the Ecopath model BOWF) and benthic communities in the Bay of Seine, north-western France (modified fromBaffreau et al, 2017).…”

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confidence: 99%

Measuring sensitivity of two OSPAR indicators for a coastal food web model under offshore wind farm construction

Raoux

Lassalle

Pezy

et al. 2019

Ecological Indicators

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A combination of modelling tools was applied to simulate the impacts of the future Courseulles-sur-mer offshore wind farm construction (OWF) (Bay of Seine, English Channel) on the ecosystem structure and functioning. To do so, food-web models of the ecosystem under three scenarios were constructed to investigate the effect of added substrate (reef effect), fishing restriction (reserve effect), and their combined effect caused by the OWF. Further, Ecological Network Analysis indices and Mean Trophic Level (MTL) were derived to investigate their suitability for detecting changes in the ecosystem state. Our analyses suggest changes in the ecosystem structure and functioning after the OWF construction, the ecosystem maturity was predicted to increase, but no alterations in its overall resilience capacity.

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“…The EUNIS habitat classification was first published in the early 2000s and was developed according to the data available at the time. The classification was then better suited to describe shallow bays and estuarine environments (mobile muddy fine sediments) such as the Bay of Seine in the English Channel (42) rather than in coarser sediment habitats occurring in deeper areas such as those found in the central and western part of EC. The EUNIS habitat classification is now widely used to describe the diversity of marine benthic habitats of the European marine seabed [28,41].…”

Section: Eunis Classificationmentioning

confidence: 99%

A Multidisciplinary Approach for A Better Knowledge of the Benthic Habitat and Community Distribution in the Central and Western English Channel

Dauvin

Pezy

Poizot

et al. 2022

JMSE

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About 80% of the seabed of the English Channel (EC) is covered by coarse sediment, from coarse sand to pebbles. Quantitative data on the benthic macrofauna in these types of sediment remains are rare due to the difficulty of using grab corers in such hard substrates. The deepest central part of the EC (45–101 m depth) was prospected during two VIDEOCHARM surveys in June 2010 and June 2011 to increase knowledge of such sublittoral coarse sediment benthic habitats. Sampling focussed on a longitudinal transect in the deepest part of the EC (13 boxes), extending from the western approach to the Greenwich meridian. Both indirect (side scan sonar, Remote Operated Vehicule) and direct (grab sampling with benthos determination, and grain-size analyses) approaches were used and combined, permitting description of the benthic habitats and communities using seven methods. Five benthic EUNIS habitats (European Nature Information System) were reported: MC3215, MD3211, MC4, MC3212 and MC4215, of which two extended main habitats (MC3211 and M23212) corresponded to an eastern/western gradient from sandy gravel to sandy gravel and pebbles sediment. Three other spatially discrete habitats were associated with poor coarse sand and gravel habitats as well as sandy gravel and pebbles with the presence of the brittle star Ophiothrix fragilis. Taxonomic richness of both extended habitats was on the same order of magnitude as the coarse sand habitat reported elsewhere in the EC, whilst the abundances were among the lowest in deeper areas with low nutrient input and low primary production. The epifauna appeared relatively homogenous in this type of sediment at the scale of the sampling area and was not determined to assign a EUNIS habitat/class. ROV footage illustrated the presence of large epifauna and provided valuable information to ground truth in other sampling methods such as side scan sonar mosaic. Grab photos showing surface sediment was relevant to determine the sediment type, whilst granulometric analyses gave additional information on fine particles content (typically very low).

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Mapping benthic communities: An indispensable tool for the preservation and management of the eco-socio-system in the Bay of Seine

Cited by 12 publications

References 24 publications

Long-term spatio-temporal changes of the muddy fine sand benthic community of the Bay of Seine (eastern English Channel)

Long-term spatio-temporal changes of the muddy fine sand benthic community of the Bay of Seine (eastern English Channel)

Measuring sensitivity of two OSPAR indicators for a coastal food web model under offshore wind farm construction

A Multidisciplinary Approach for A Better Knowledge of the Benthic Habitat and Community Distribution in the Central and Western English Channel

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