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Type: Journal article
Title: Limited infaunal response to experimental trawling in previously untrawled areas
Author: Drabsch, S.
Tanner, J.
Connell, S.
Citation: ICES Journal of Marine Science, 2001; 58(6):1261-1271
Publisher: Academic Press Ltd
Issue Date: 2001
ISSN: 1054-3139
Statement of
Sharon L. Drabsch , Jason E. Tanner and Sean D. Connell
Abstract: There is considerable argument about the effects of bottom trawling on the benthos. Many studies have been done on recently trawled grounds, where community composition has already been modified, and further effects are likely to be minimal. This study tests the effect of trawling on macroinfaunal assemblages in an area where little or no trawling had occurred in the previous 15 years. A spatially replicated Before-After, Control-Impact (BACI) design was used, with adjacent trawl and control corridors. Sampling was done in the same two small sites within each corridor before and after trawling to minimise confounding due to spatial variation. Despite this rigorous design, changes consistent with an effect of trawling were not detected. At only one of the three locations was a potential effect detected. These inconsistent results could be due to different disturbance regimes at each location, influencing the vulnerability of fauna to further disturbance. Given the high levels of variability in infaunal assemblages, however, the changes could also be due to asynchronous natural variation. The combination of high spatial and temporal variability, in association with light trawling gear, means that prawn trawling in South Australia does not have consistent effects on infauna.
Keywords: Disturbance; effects of trawling; infauna; trawling
Description: © 2001 International Council for the Exploration of the Sea
RMID: 0020010570
DOI: 10.1006/jmsc.2001.1105
Appears in Collections:Ecology, Evolution and Landscape Science publications
Environment Institute Leaders publications

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