The Effects of Beam-Trawl Disturbance on Infaunal Communities in Different Habitats

Kaiser, Michel J.; Spencer, B. E.

doi:10.2307/5881

Cited by 235 publications

(187 citation statements)

References 26 publications

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“…Trush et al (1995) observed a decrease in species richness and diversity due to scallop dredging, and Currie & Parry (1996) reported a 20^30% decrease in infaunal abundance following commercial scallop dredging. A general decrease in biodiversity after dredge disturbance (short-term impact) has also been observed for oyster shell dredging (Conner & Simon, 1979), beam trawling (Kaiser & Spencer, 1996) and rapido trawling (Pranovi et al, 2000) in other regions.…”

Section: Discussionmentioning

confidence: 92%

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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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Section: Discussionmentioning

confidence: 92%

“…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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“…Tillin et al 2006;van Denderen et al 2015), it is surprising that we found a higher ratio of suspension to deposit feeders in sand communities that experienced a higher frequency of chronic fishing. However, a clear trend that emerges from previous studies is that the degree of natural disturbance in which a community develops determines the degree to which it is affected by bottom fishing (Kaiser and Spencer 1996;Hiddink et al 2006;Sciberras et al 2013). The macro-invertebrate communities at our sandy study sites are adapted to living in physically dynamic areas that are characterized by relatively high near-bed current flows (Hiddink et al 2009) and infrequent fishing activity (1.63 times year -1 ), so community recruitment and growth is unlikely to be significantly affected by fishing.…”

Section: Discussionmentioning

confidence: 84%

Mediation of nitrogen by post-disturbance shelf communities experiencing organic matter enrichment

et al. 2017

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Microbes and benthic macro-invertebrates interact in sediments to play a major role in the biogeochemical cycling of organic matter, but the extent to which their contributions are modified following natural and anthropogenic changes has received little attention. Here, we investigate how nitrogen transformations, ascertained from changes in archaeal and bacterial N-cycling microbes and water macronutrient concentrations ([NH 4 -N], [NO 2 -N], [NO 3 -N]), in sand and sandy mud sediments differ when macrofaunal communities that have previously experienced contrasting levels of chronic fishing disturbance are exposed to organic matter enrichment.We find that differences in macrofaunal community structure related to differences in fishing activity affect the capacity of the macrofauna to mediate microbial nitrogen cycling in sand, but not in sandy mud environments. Whilst we found no evidence for a change in ammonia oxidiser community structure, we did find an increase in archaeal and bacterial denitrifier (AnirKa, nirS) and anammox (hzo) transcripts in macrofaunal communities characterized by higher ratios of suspension to deposit feeders, and a lower density but higher biomass of sediment-reworking fauna. Our findings suggest that nitrogen transformation in shelf sandy sediments is dependent on the stimulation of specific nitrogen cycling pathways that are associated with differences in the composition and context-dependent expression of the functional traits that belong to the resident bioturbating macrofauna community.

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“…For example, Pranovi et al (2004) in a multidisciplinary study of the immediate effects of mechanical clam harvesting in the Venice lagoon detected a significant decrease in the total number of individuals after the haul. Thrush et al (1995) observed a decrease in macrofaunal taxa due to scallop dredging and Kaiser and Spencer (1996) reported a general decrease in biodiversity after beam trawling.…”

Section: Biological Impactsmentioning

confidence: 99%

“…According to several studies, macrobenthic communities from high-energy environments tend to be less affected to fishing as they are naturally and consistently subjected to disturbance (e.g. Currie and Parry, 1996;Kaiser et al, 1996;Zajac and Whitlatch, 2003). Nevertheless, in a moderately disturbed environment, Morello et al (2006) found that fishing impacts on benthic community structure were still distinguishable from those resulting from natural variation.…”

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 Effects of Beam-Trawl Disturbance on Infaunal Communities in Different Habitats

Cited by 235 publications

References 26 publications

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

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

Mediation of nitrogen by post-disturbance shelf communities experiencing organic matter enrichment

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

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