Assessment of ecosystem function following marine aggregate dredging

Cooper, Keith; Froján, Christopher R.S. Barrio; Defew, Emma C.; Curtis, Matthew; Fleddum, A.; Brooks, Lucy; Paterson, David M.

doi:10.1016/j.jembe.2008.07.011

Cited by 74 publications

(28 citation statements)

References 45 publications

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“…The information has been compiled from a broad selection of literature on natural history and life functions, from numerous studies of the ecology of benthic species in the Oslofjord, and by consulting experts (details may be obtained from the authors). Traits information from the database has previously been used in a study by Cooper et al (2008). Table 2 gives an overview of the information in the database for major taxonomic groups.…”

Section: Compilation Of Traits Informationmentioning

confidence: 99%

“…Natural phenomena or human influences that affect the organisms may consequently be expected to also lead to changes in the functioning of the ecosystems (e.g. Cooper et al, 2008;Gray et al, 2006;Schratzberger et al, 2007;Tillin et al, 2006). It is a matter of question, however, which functions are affected and to what degree, as this will depend on the biological features of the species that are decreasing or increasing in response to the influence.…”

Section: Introductionmentioning

confidence: 99%

“…Charvet et al, 2000;Chevenet et al, 1994;Doledec et al, 1999;Lamouroux et al, 2004;Usseglio-Polatera et al, 2000), but recently there have been several studies using BTA to describe the ecological functioning of marine benthic assemblages as well (e.g. Aarnio et al, 2011;Bremner et al, 2003Bremner et al, , 2006aCooper et al, 2008;Fleddum, 2010;Marchini et al, 2008;Schratzberger et al, 2007;Tillin et al, 2006;Villnäs et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Biological traits analyses in the study of pollution gradients and ecological functioning of marine soft bottom species assemblages in a fjord ecosystem

Oug

Fleddum

Rygg

et al. 2012

Journal of Experimental Marine Biology and Ecology

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Section: Compilation Of Traits Informationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Biological traits analyses in the study of pollution gradients and ecological functioning of marine soft bottom species assemblages in a fjord ecosystem

Oug

Fleddum

Rygg

et al. 2012

Journal of Experimental Marine Biology and Ecology

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“…comm.). However, the site's postextraction status was extensively researched between 2000 and 2007, 4-10 years after dredging (Boyd et al, 2003;Boyd et al, 2004;Boyd et al, 2005;Cooper et al, 2005;Wan Hussin et al, 2012). This showed that physical and biological recovery occurred in areas of relatively low dredging intensity after 7 years.…”

Section: Case Study Sitementioning

confidence: 99%

Can the benefits of physical seabed restoration justify the costs? An assessment of a disused aggregate extraction site off the Thames Estuary, UK

Cooper

Burdon

Atkins

et al. 2013

Marine Pollution Bulletin

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Physical and biological seabed impacts can persist long after the cessation of marine aggregate dredging. Whilst small-scale experimental studies have shown that it may be possible to mitigate such impacts, it is unclear whether the costs of restoration are justified on an industrial scale. Here we explore this question using a case study off the Thames Estuary, UK. By understanding the nature and scale of persistent impacts, we identify possible techniques to restore the physical properties of the seabed, and the costs and the likelihood of success. An analysis of the ecosystem services and goods/benefits produced by the site is used to determine whether intervention is justified. Whilst a comparison of costs and benefits at this site suggests restoration would not be warranted, the analysis is site-specific. We emphasise the need to better define what is, and is not, an acceptable seabed condition post-dredging.

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“…Thus, the key question is not whether dredging activities have an impact, but to which extent the affected macrofauna communities can recover MESL (Marine Ecological Surveys Limited 2007). Although the recovery rates are highly site-specific (Boyd et al 2004;Cooper et al 2005;Rees 1994, 1996;Kenny et al 1998), some general principals are well known.…”

Section: Introductionmentioning

confidence: 99%

Benthic biodiversity changes in response to dredging activities during the construction of a deep-water port

et al. 2015

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During the construction of a deep-water port (JadeWeserPort), bathymetry, sediment distribution, and macrofauna community structure were studied in the Inner Jade, a highly anthropogenically impacted tidal channel located in the southern North Sea. In order to assess the effects of additional disturbance by dredging activities, macrofaunal community compositions between 2002 (before the construction work had begun) and 2010 (during the final construction phase) were compared. The sand extraction for land reclamation and the redirection of the fairway changed the bathymetry markedly. While the old fairway in the centre of the study area remained mud dominated, a general increase in coarser sediments was detected in 2010. The dynamic nature of the study area in combination with the direct and indirect effects of dredging increased bathymetric heterogeneity [measured by singlebeam (2002) and multibeam (2010) echo-sounder]. In 2010, the macrofauna community structure roughly resembled the different categories of dredging activities. The most recently dredged northwestern area was inhabited by a community, which was different from the community in the regularly dredged old fairway. Both were different from the community in the northeastern, non-dredged area. In the southern area, and in the transition areas between the other three communities, a fourth community was found. A general increase of macrofaunal abundance and taxa number was observed in 2010, with the exception of the recently dredged area. The structure of the macrofauna community during the port construction phase seemed to be determined by secondary dispersal of the dominant taxa and recolonisation by highly mobile and opportunistic species.

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Assessment of ecosystem function following marine aggregate dredging

Cited by 74 publications

References 45 publications

Biological traits analyses in the study of pollution gradients and ecological functioning of marine soft bottom species assemblages in a fjord ecosystem

Biological traits analyses in the study of pollution gradients and ecological functioning of marine soft bottom species assemblages in a fjord ecosystem

Can the benefits of physical seabed restoration justify the costs? An assessment of a disused aggregate extraction site off the Thames Estuary, UK

Benthic biodiversity changes in response to dredging activities during the construction of a deep-water port

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