Ocean Survey 20/20, Chatham Rise Benthos: effects of seabed trawling on benthic communities / David Bowden, Daniel Leduc.

By: Bowden, David A.
Contributor(s): Leduc, Daniel [author.] | New Zealand. Ministry for Primary Industries [issuing body.].
Material type: materialTypeLabelBookSeries: New Zealand aquatic environment and biodiversity report: no. 183.Publisher: Wellington [N.Z.] : Ministry for Primary Industries, 2017Description: 67 pages : colour illustrations; 1 electronic resource.ISBN: 9781776655946 (online).ISSN: 1179-6480 (online).Subject(s): Ocean Survey 20/20 Chatham Rise-Challenger Project | MARINE INVERTEBRATES | BOTTOM TRAWLING | ENVIRONMENTAL IMPACT | CHATHAM RISE | MERNOO BANK | BENTHOS | MARINE BENTHOS | ECOLOGICAL SURVEYS | NEW ZEALANDHoldings: ELECTRONIC Online resources: Fisheries Infosite | No. 183 NIWA document server Summary: Trawl fisheries have direct impacts on seabed habitats and fauna that are likely to alter ecosystem function over time. We used towed cameras and corers to study changes in benthic community composition across gradients of cumulative trawling pressure in two areas on Chatham Rise. We found that trawling accounted for up to 17 % of variation in benthic epifaunal communities. Our results indicate that trawling modifies the structure and functional composition of epifaunal communities, with reduction in the density of sensitive taxa and overall evenness and diversity.
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ELECTRONIC No. 183 1 Not for loan 383355

"June 2017."

Includes bibliographical references.

Trawl fisheries have direct impacts on seabed habitats and fauna that are likely to alter ecosystem function over time. We used towed cameras and corers to study changes in benthic community composition across gradients of cumulative trawling pressure in two areas on Chatham Rise. We found that trawling accounted for up to 17 % of variation in benthic epifaunal communities. Our results indicate that trawling modifies the structure and functional composition of epifaunal communities, with reduction in the density of sensitive taxa and overall evenness and diversity.

ELECTRONIC

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