Chronic fishing disturbance has changed shelf sea benthic community structure
نویسندگان
چکیده
منابع مشابه
Chronic ®shing disturbance has changed shelf sea benthic community structure
1. Bottom ®shing using towed nets and dredges is one of the most widespread sources of physical disturbance to the continental shelf seas throughout the world. Previous studies suggest that degradation and ecosystem changes have occurred in intensively ®shed areas. Nevertheless, to date it has been dicult to attribute habitat and benthic community changes to ®shing eort at a spatial scale tha...
متن کاملA quantitative analysis of fishing impacts on shelf-sea benthos.
1. The effects of towed bottom-fishing gear on benthic communities is the subject of heated debate, but the generality of trawl effects with respect to gear and habitat types is poorly understood. To address this deficiency we undertook a meta-analysis of 39 published fishing impact studies. 2. Our analysis shows that inter-tidal dredging and scallop dredging have the greatest initial effects o...
متن کاملBenthic Invertebrate Community Structure
Fundamental to the scientific method is the use of controls or control conditions against which results obtained under test conditions are compared. In field studies, all variables cannot be controlled and replicates cannot be randomly assigned to treatments, so an attempt is made to choose test and control conditions (often represented by different sites) that are as similar as possible; the v...
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Diversity and community patterns of macro- and megafauna were compared on the Canadian Beaufort shelf and slope. Faunal sampling collected 247 taxa from 48 stations with box core and trawl gear over the summers of 2009-2011 between 50 and 1,000 m in depth. Of the 80 macrofaunal and 167 megafaunal taxa, 23% were uniques, present at only one station. Rare taxa were found to increase proportional ...
متن کاملDisturbance of the Marine Benthic Habitat by Commercial Fishing: Impacts at the Scale of the Fishery
Commercial fishing is one of the most important human impacts on the marine benthic environment. One such impact is through disturbance to benthic habitats as fishing gear (trawls and dredges) are dragged across the seafloor. While the direct effects of such an impact on benthic communities appear obvious, the magnitude of the effects has been very difficult to evaluate. Experimental fishing-di...
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ژورنال
عنوان ژورنال: Journal of Animal Ecology
سال: 2000
ISSN: 0021-8790,1365-2656
DOI: 10.1046/j.1365-2656.2000.00412.x