期刊
MARINE POLLUTION BULLETIN
卷 80, 期 1-2, 页码 250-262出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2013.12.008
关键词
Benthic ecology; Fallowing; Aquaculture; Remediation; Parallelism; BACI
资金
- Cawthron Institute (Nelson, New Zealand)
- internal investment funding (IIF)
- Institute of Marine and Antarctic Sciences (IMAS), University of Tasmania
- New Zealand King Salmon Company Ltd
This study documents eight years of benthic recovery at a highly impacted salmon farm. Substantial recovery occurred in the first 2 years, and was assessed to be complete after similar to 5 years. However, minor differences were still evident, along with some on-going benthic instability, attributable to medium-scale spatial movements and successional patterns of macrobenthos. Quantifying the endpoint of 'recovery' proved challenging due to: lack of a widely accepted definition, inherent variability in recovering sedi-ments, differing trajectories of impact and reference sites, and statistical challenges. More complex biotic indices and metrics incorporating multiple variables were the most robust indicators. Statistical tests for 'parallelism' in the trajectories of Cage and Reference sites proved useful, but results were contingent upon how the method was applied, and should therefore be used in conjunction with data-visualisation methods. The study highlights the importance of a predetermined recovery endpoint, and using multiple indicators and a weight-of-evidence assessment approach. (C) 2013 Elsevier Ltd. All rights reserved.
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