Physical and biological impact of marine aggregate extraction along the French coast of the Eastern English Channel: short- and long-term post-dredging restoration

Desprez, Michel

doi:10.1006/jmsc.2000.0926

Cited by 164 publications

(109 citation statements)

References 14 publications

(23 reference statements)

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“…Thrush et al 1995, Auster et al 1996, Jennings & Polunin 1996, Kaiser & Spencer 1996, MacDonald et al 1996, Collie et al 1997, Engel & Kvitek 1998, Thrush et al 1998, Tuck et al 1998, Auster & Langton 1999, Ball et al 2000, Kaiser 2003) and a suite of other impacts (e.g. Weston 1990, Montagna & Harper 1996, Desprez 2000, Sager 2002) to the ocean bottom are acute. Certainly bottom-tending fishing gear, drilling, dumping, toxic spills, etc.…”

Section: Discussionmentioning

confidence: 99%

Using fish stomachs as samplers of the benthos: integrating long-term and broad scales

Link

2004

Mar. Ecol. Prog. Ser.

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Sampling benthic organisms in a synoptic manner is difficult, particularly at the scale of large marine ecosystems. Several known omnivorous and benthivorous fishes were evaluated as possible samplers of the benthic community on the scale of the US northeast continental shelf ecosystem, collected from the early 1970s to 2001. Frequency of occurrence of organisms in the diet across time was examined as an index of relative abundance. Other prey and sampling caveats were accounted for by considering only those predators that met criteria such as adequate sample size, appropriate diet compositions, asymptotic stomach-prey curves, and relative constancy of all major prey groups comprising the diet. The geographic distribution of a suite of benthic organisms found in the stomachs of predators was also examined. The benthic organisms focused on were ophiuroids, echinoids, holothuroideans, asteroids, octopods, stomatopods, cumaceans, pagurids, aphroditids, anthozoans, hydrozoans and caprellids. Of these 12 prey groups, only 3 showed a decline over time based on evidence from multiple predator stomachs. Most benthic organisms exhibited non-negative trends in an index of relative abundance, and 2 showed an increase over the time-series. Additionally, many of the organisms were widely distributed, with some concentrated more on Georges Bank and others more in the Gulf of Maine. Only 1 of 9 organisms showed a shift in distribution compared to studies from 50 yr earlier. I conclude that at broad spatial and temporal scales, the routine and systematic sampling of fish stomachs can be a useful indirect method for inferring information about benthic communities on continental shelves.

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Section: Discussionmentioning

confidence: 99%

Using fish stomachs as samplers of the benthos: integrating long-term and broad scales

Link

2004

Mar. Ecol. Prog. Ser.

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“…Eutrophication can result in serious problems in lakes, such as reduced water quality, decreased biodiversity, induced toxic cyanobacterial bloom, and even though threatened the drinking water safety. Thus, various strategies to control eutrophication in lakes have been proposed, such as control of external nutrient loading, sediment dredging, sediment curing, and phytoremediation (Murphy et al 1999;Desprez 2000;Ye et al 2011). Among these, phytoremediation is very attractive and widely used because of its low cost and easy management (Sun et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Effects of engineered application of Eichhornia crassipes on the benthic macroinvertebrate diversity in Lake Dianchi, an ultra-eutrophic lake in China

Zhang

Zhi

Zhang

et al. 2016

Environ Sci Pollut Res

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An ecological engineering project with confined growth of 1.5 km 2 of Eichhornia crassipes was implemented to remove pollutants in Lake Dianchi. To assess the ecological effects of this project on benthic macroinvertebrate assemblages, a 1-year investigation at the areas inside and outside E. crassipes mats was conducted from May 2013 to May 2014. All the 10 sampling sites in the areas were grouped into two statistically significant clusters mainly corresponding to inside and outside E. crassipes mat areas (EMAs), by clustering analysis. E. crassipes reduced the densities of pollution indicator taxa (e.g., Oligochaeta and Chironomidae larvae); thus, the total densities of benthic macroinvertebrates at the area inside EMAs (mean 328.2 ind./m 2 ) were slightly lower than that at the area outside EMAs (mean 505.6 ind./m 2 ). Four functional feeding groups including 38 species of benthic macroinvertebrates were collected at the area inside EMAs, while only three functional feeding groups containing 17 species were collected at the area outside EMAs. The biodiversity indices (Shannon-Weiner, Margalef, Simpson, and Peilou

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“…The continuous removal of the substrate changes the bottom topography as well as the sediment composition. Desprez (2000) reported that after several years of dredging along the French coast of the eastern English Channel, the seabed surface was seriously affected, with reduced species richness, abundance, and biomass. Furthermore, the reconstituted benthic communities formed by recolonisation at the dredging extraction and disposal sites were different from the original communities and from the biota found at the control station.…”

Section: Introductionmentioning

confidence: 99%

“…However, little is understood about the effects of coastal dredging on estuarine fish assemblages (PÉREZ-RUZAFA et al, 2006) which are expected to be less affected by dredging activities than the benthic community, due to their ability to avoid the disturbed area (DESPREZ, 2000). Certain species may be more vulnerable to sedimentation or smothering of eggs on spawning grounds (WESTERBERG et al, 1996).…”

Section: Introductionmentioning

confidence: 99%

Impact on a fish assemblage of the maintenance dredging of a navigation channel in a tropical coastal ecosystem

et al. 2012

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A B S T R A C TDredging and dredge-spoil disposal are among the major problems in coastal management. Many of the scientific contributions concerning the impacts of this practice are based on the study of sessile organisms and subtropical environments. We evaluated changes in the composition and abundance of a fish assemblage resulting from dredging and sediment disposal at the mouth and in the adjacent waters of the Caravelas River on the north-eastern coast of Brazil. Samples were collected in two directly impacted and three adjacent areas. Differences among stations were not significant, but the dredged site had the least diverse station, as expected. The stations farthest from the directly impacted areas apparently were not influenced by the coastal work, thus suggesting localised effects. The contribution of the present study is particularly important because of the study area's proximity to others that have high conservation value such as mangrove forests and coral reefs, and the relevance of the subject given the continuing dredging activity. R E S U M OA dragagem e descarte de sedimento se destacam como atividades que geram grandes distúrbios aos ecossistemas marinhos e, consequentemente tornam-se um desafio ao manejo e ordenamento costeiro. Grande parte dos estudos que abordam seus impactos é baseada em pesquisas com organismos sésseis e em ambientes temperados, criando uma lacuna no entendimento de seus efeitos sobre a ictiofauna, principalmente nas regiões tropicais. No presente estudo foram avaliadas as alterações na composição e abundância da comunidade de peixes sob influência da dragagem e descarte de sedimento na foz do Rio Caravelas, costa da região Nordeste do Brasil. As amostras foram obtidas em duas estações diretamente afetadas e em três outras áreas adjacentes. Não houve diferença significativa na diversidade média obtida para cada estação, porém a estação correspondente à área dragada apresentou o menor valor dentre as demais. As estações mais afastadas aparentemente não foram influenciadas pelo empreendimento sugerindo efeitos localizados. A contribuição do presente estudo é particularmente importante devido à proximidade com áreas de alto valor de conservação como manguezais e recifes de corais e a relevância do assunto, o qual trata de uma atividade que sugere expansão em vista do desenvolvimento da atividade portuária.

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Physical and biological impact of marine aggregate extraction along the French coast of the Eastern English Channel: short- and long-term post-dredging restoration

Cited by 164 publications

References 14 publications

Using fish stomachs as samplers of the benthos: integrating long-term and broad scales

Using fish stomachs as samplers of the benthos: integrating long-term and broad scales

Effects of engineered application of Eichhornia crassipes on the benthic macroinvertebrate diversity in Lake Dianchi, an ultra-eutrophic lake in China

Impact on a fish assemblage of the maintenance dredging of a navigation channel in a tropical coastal ecosystem

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