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Spatial and temporal dynamics in macrobenthos during recovery from salmon farm induced organic enrichment: when is recovery complete?

Citation

Keeley, NB and MacLeod, CK and Hopkins, GA and Forrest, BM, Spatial and temporal dynamics in macrobenthos during recovery from salmon farm induced organic enrichment: when is recovery complete?, Marine Pollution Bulletin, 80, (1-2) pp. 250-262. ISSN 0025-326X (2014) [Refereed Article]

Copyright Statement

Copyright 2013 Elsevier

DOI: doi:10.1016/j.marpolbul.2013.12.008

Abstract

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 ~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 sediments, 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.

Item Details

Item Type:Refereed Article
Keywords:benthic ecology, fallowing, aquaculture, remediation, parallelism, BACI
Research Division:Agricultural and Veterinary Sciences
Research Group:Fisheries Sciences
Research Field:Aquaculture
Objective Division:Environment
Objective Group:Ecosystem Assessment and Management
Objective Field:Ecosystem Assessment and Management of Marine Environments
Author:MacLeod, CK (Associate Professor Catriona MacLeod)
ID Code:88581
Year Published:2014
Web of Science® Times Cited:9
Deposited By:Sustainable Marine Research Collaboration
Deposited On:2014-02-07
Last Modified:2016-10-05
Downloads:0

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