The impact of hydraulic dredging for razor clams Ensis sp. on an infaunal community

Hall, Stephen J.; Basford, D.J.; Robertson, M. R.

doi:10.1016/0077-7579(90)90040-n

Cited by 75 publications

(45 citation statements)

References 8 publications

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“…indirect effects on community structure that can occur in response to predator removal; Sih et al 1985, Kneib 1991 and larger-scale environmental features (e.g. variations in the frequency and intensity of storm disturbance of the seabed; Hall et al 1990, Brylinsky et al 1994, Hall 1994 which are likely to influence the identification of any fishing effects. Apart from the influence of physical and biological environmental features, the intensity, frequency and gear used in a particular fishery also needs to be considered in developing hypotheses about potential fishing impacts.…”

Section: Discussionmentioning

confidence: 99%

The impact of habitat disturbance by scallop dredging on marine benthic communities:what can be predicted from the results of experiments?

Sf¹,

Je²,

Cummings³

et al. 1995

Mar. Ecol. Prog. Ser.

156

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Field experiments were conducted on 2 subtidal sandflats to identify the short-term impacts of commercial scallop dredging on macrobenthic communities. The 2 sites (1400 m2) were situated 14 km apart, both at about 24 m depth, with similar exposure aspects and were characterised by infaunal communities dominated by small and short-lived species. Prior to dredging, preliminary sampling failed to reveal significant differences in the density of common macrofauna within each site, although community composition was distinctly different between sites The experiment was initiated by using a commercial scallop dredge to dredge half of each study site. Macrofauna samples were collected in both the dredged and adjacent reference plot at each site irnmed~ately after dredging and again 3 mo later. The density of common macrofaunal populations at each site decreased as a result of dredging, with some populations still significantly different from the adjacent reference plot after 3 mo. Significant compositional differences in the assemblage structure between dredged and reference plots were also recorded at each site over the course of the experiment. The f~n d~n g s of this experiment are considered a conservative assessment of bottom disturbance by fishing because of the area of seabed used, the types of community present and the intensity of disturbance used in the experiment. The findings of this and similar short-term experiments are discussed in light of the need to predict and assess possible large-scale changes to benthic communities as a result of habitat disturbance by fishing.

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Section: Discussionmentioning

confidence: 99%

The impact of habitat disturbance by scallop dredging on marine benthic communities:what can be predicted from the results of experiments?

Sf¹,

Je²,

Cummings³

et al. 1995

Mar. Ecol. Prog. Ser.

156

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“…The environmental e¡ects of shell¢sh dredging have thus received particular recent attention worldwide (see Caddy, 1968Caddy, , 1973Meyer et al, 1981;Hall et al, 1990;Kaiser & Spencer, 1996;Jennings et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

Changes in benthic community structure due to clam dredging on the Algarve coast and the importance of seasonal analysis

et al. 2003

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Patterns in community structure of meiofauna and macrofauna in relation to Portuguese clam dredging were compared during a 2-y-period o¡ Lagos and Vilamoura, south Portugal. SCUBA divers randomly sampled corer and quadrat samples before and immediately after simulating commercial dredge ¢shery. Univariate measures (abundance, number of taxa, evenness, diversity and biomass) and multivariate analyses (Cluster, MDS and SIMPER) revealed changes in the meio-and macro-benthic community structure caused by dredge disturbance (short-term e¡ects), with a general decrease in all measures. Macrofauna were found to be more sensitive to dredge disturbance, and aggressive predatory behaviour was observed after disturbance in the continuously dredged area. Nevertheless, higher signi¢cant natural changes were found between seasonal periods, indicating that dredging may only cause a small-scale and short-term impact.

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“…Kaiser et al, 1998;Hall-Spencer et al, 1999;Gutiérrez et al, 2004;Pranovi et al, 2004), with moderate disturbance effects being referenced by other authors (e.g. Hall et al, 1990;Schratzberger et al, 2002;Gaspar et al, 2003).…”

Section: Introductionmentioning

confidence: 94%

“…In fact, the effect of wave action has been previously suggested as a forcing function for the restoration and recovery of fisheries-disturbed grounds (Kaiser et al, 1998;DeAlteris et al, 1999;Gaspar et al, 2003;Flåten et al, 2004). It has been reported that the effects of storms may be much greater that anthropogenic stress (Hall et al, 1990;Brylinsky et al, 1994;Dolmer and Frandsen, 2002).…”

Section: The Relationship Between Depth and Benthic Impactsmentioning

confidence: 99%

Clam dredging effects and subsequent recovery of benthic communities at different depth ranges

Constantino

Gaspar

Tata-Regala

et al. 2009

Marine Environmental Research

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The impact of hydraulic dredging for razor clams Ensis sp. on an infaunal community

Cited by 75 publications

References 8 publications

The impact of habitat disturbance by scallop dredging on marine benthic communities:what can be predicted from the results of experiments?

The impact of habitat disturbance by scallop dredging on marine benthic communities:what can be predicted from the results of experiments?

Changes in benthic community structure due to clam dredging on the Algarve coast and the importance of seasonal analysis

Clam dredging effects and subsequent recovery of benthic communities at different depth ranges

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