Effects of Dredging and Open-Water Disposal on Benthic Macroinvertebrates in a South Carolina Estuary

Dolah, Robert F. Van; Calder, Dale R.; Knott, David M.

doi:10.2307/1351954

Cited by 88 publications

(38 citation statements)

References 4 publications

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“…Dredge spoil disposal often causes biological and chemical changes in the disposal area seafloor (reviewed by Morton 1977;Roberts 1990;USEPA & US ACE 1992). However, our results are comparable to some published examples where dredge spoil dumping has led to dilution of contaminated dredgings (Delo 1987), reduction of sediment toxicity and little or no negative impact on benthic macro fauna (Van Dolah et al 1984;Cole et al 1997;Gowing et al 1997).…”

Section: Discussionsupporting

confidence: 90%

“…Received 2 October 1998;accepted 16 June 1999 Foundation 1989; Ports of Auckland Ltd 1990; Roberts 1990;Foster et al 1996;Cole et al 1997;Gowing et al 1997;Mathew et al 1997) and overseas (e.g., Morton 1977;Van Dolah et al 1984) show that the resulting impacts on the environment will be site-specific, and may vary greatly depending on the nature of the dredgings and the disposal site.…”

Section: M98072mentioning

confidence: 99%

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Minimal impact from long‐term dredge spoil disposal at a dispersive site in Tasman Bay, New Zealand

Roberts

Forrest

1999

New Zealand Journal of Marine and Freshwater Research

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The effects of dredge spoil disposal on contaminant concentrations and benthic macrofauna were examined at a shallow marine disposal site used for c. 20 years. The site had received c. 50 000 m 3 yr -1 of maintenance dredgings annually, from the Port of Nelson. Port sediments were contaminated to varying degrees with some trace metals, organochlorine pesticides, polychlorinated biphenyls, and polycyclic aromatic hydrocarbons. They showed mildly elevated toxicity in laboratory bioassays, and their macrofauna was dominated by small-bodied polychaetes. Despite this, there was very little indication of impact in the spoil disposal area. The disposal area, spoil spreading zone and control sites were all similar in terms of sediment contaminants, sediment toxicity, neogastropod imposex, and macrofauna. The lack of discernible impact is probably because of the dynamic sedimentary environment in the disposal area, which disperses dumped dredgings and mixes them with ambient sediment.

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Section: Discussionsupporting

confidence: 90%

Section: M98072mentioning

confidence: 99%

Minimal impact from long‐term dredge spoil disposal at a dispersive site in Tasman Bay, New Zealand

Roberts

Forrest

1999

New Zealand Journal of Marine and Freshwater Research

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“…The literature dealing with the effect of dredging on benthic fauna does not provide clear indications of the direction and duration of these changes. Most studies (van Dolah et al, 1984;Aldridge, 2000;Lewis et al, 2001;Ohimain et al, 2005) indicate a decrease in the abundance of macrofauna and changes in species composition and dominance structure, but in varying degrees, at times even minimal and limited to certain biocoenotic indicators (McCabe et al, 1998). Hence the aim of the study was to determine the effect of changes in selected environmental parameters induced by dredging on the abundance, composition and dominance structure of the Coleoptera fauna inhabiting a river, putting forth the hypothesis that the work conducted causes substantial modifications, including a decrease in the abundance and biodiversity of Coleoptera fauna.…”

Section: The Impact Of Dredging Of a River On Water Beetlesmentioning

confidence: 99%

The impact of dredging of a small lowland river on water beetle fauna (Coleoptera)

et al. 2016

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Using the example of a regulated stretch of the River Krąpiel (NW Poland), an analysis of the impact of dredging on the aquatic beetle (Coleoptera) fauna was made. After dredging the beetle fauna became markedly poorer quantitatively and had lower species diversity. Moreover, the qualitative composition and dominance structure were highly transformed. However, species number and diversity increased rapidly and were restored within just half a year. The structure of the restored fauna was most strongly influenced by vegetation, flow velocity and bottom sediment composition. The first to colonize the river were eurytopic beetles and species typical of small water bodies, which had significant refuges in the form of fish ponds bordering on the river; these species dominated the assemblage throughout the study period. Rheophiles with less dispersal power appeared later, and finally rheobionts, in low numbers but occupying an increasing number of sampling sites.

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“…Jones (1986) a decrease in species number after deposition, but a similar number of individuals when compared to that of the control site. However, some other studies have shown minimal (van Dolah et al, 1984) or nondetectable effects of sediment deposition (Smith & Rule, 2001). These last authors demonstrated that, even in a shallow area (6 m depth), dredgespoil dumping at Park Beach (Australia) had no detectable short-or medium-term effects upon the infaunal community.…”

Section: Discussionmentioning

confidence: 99%

“…Studies have demonstrated broad differences in disposal effects on the macrofauna, ranging from minimal (van Dolah et al, 1984;Radenac et al, 1997;Roberts & Forrest, 1999;Smith & Rule, 2001) to significant community-structure changes (Rees et al, 1992;Harvey et al, 1998;Roberts et al, 1998), indicating that the potential environmental effects of each dredging project must be evaluated on a case-by-case basis (Harvey et al, op cit).…”

Section: Introductionmentioning

confidence: 99%

Effects of dredged sediment disposal on the coastal marine macrobenthic assemblage in Southern Brazil

2006

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The aim of this study was to evaluate the deposition impact of dredged material from Patos lagoon estuary on a benthic macroinvertebrate assemblage structure in an adjacent coastal marine area. Nine sampling stations were chosen at random in the disposal area, and nine others in the same way in an adjacent control area. Samples were collected at a 19 m depth before sediment disposal (11 July 2000), during dredging and disposal operations (25 Oct. 2000), and three months thereafter (24 Aug. 2001). Statistical analysis indicated that sampling periods presented similar characteristics in both the control and disposal sites. Disposal of dredged sediment from Patos lagoon had no detectable detrimental effects upon macrobenthic faunal assemblage at the dumping site. This result is attributed both to adaptation of resident biota to dynamic sedimentary conditions and to the fine estuarine sediment dredged, the dispersion of which in the water column might have minimized sediment deposition and consequent damage to the benthic fauna.Keywords: dredge, environmental impact, Patos lagoon, coastal zone. resumo efeitos da deposição de material proveniente de dragagem sobre uma associação de macroinvertebrados bentônicos na zona costeira do sul do brasilObjetivou-se avaliar o impacto da deposição de material dragado proveniente da região estuarina da lagoa dos Patos sobre a estrutura da associação macrobentônica no sítio de deposição, situado no ambiente marinho costeiro adjacente à desembocadura da laguna. Nove estações de coleta foram sorteadas, tanto no sítio de deposição quanto na área controle adjacente. As amostras, a 19 m de profundidade, foram coletadas antes do início de deposição do sedimento (11/07/2000), durante as operações de dragagem e deposição (25/10/2000) e três meses após o encerramento das atividades de deposição do material dragado (24/08/2001). Análises estatísticas indicaram que áreas controle e sítio de deposição apresentaram características faunísticas similares dentro dos períodos amostrais. Não foram detectados efeitos prejudiciais da deposição do sedimento sobre a associação de macroinvertebrados bentônicos na área de depósito. Este resultado pode ser atribuído às características da biota residente que está, provavelmente, adaptada às condições da dinâmica sedimentar do local e também às características predominantemente finas do sedimento dragado que, ao dispersar-se na coluna d´água, minimizaram a deposição das frações mais finas e um eventual dano ao macrozoobentos.Palavras-chave: dragagem, impacto ambiental, lagoa dos Patos, zona costeira.

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Effects of Dredging and Open-Water Disposal on Benthic Macroinvertebrates in a South Carolina Estuary

Cited by 88 publications

References 4 publications

Minimal impact from long‐term dredge spoil disposal at a dispersive site in Tasman Bay, New Zealand

Minimal impact from long‐term dredge spoil disposal at a dispersive site in Tasman Bay, New Zealand

The impact of dredging of a small lowland river on water beetle fauna (Coleoptera)

Effects of dredged sediment disposal on the coastal marine macrobenthic assemblage in Southern Brazil

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