Broad-scale effects of marine salmonid aquaculture on macrobenthos and the sediment environment in southeastern Tasmania
By G. Edgar, C. Macleod, Ron B. Mawbey, D. Shields. 2005
89 citations recorded by the source corpus.
A comparison of sediments and associated macrobenthos at sites sampled within 20 fish farm leases distributed across southeastern Tasmania indicated major natural changes along a regional cline. Introduced taxa were strongly represented in the fauna, comprising 45% of total macrofaunal biomass. Large differences were evident between sites affected by different levels of organic farm waste. Sites located adjacent (b10 m) to farm cages possessed significantly depressed sediment redox levels, a dominance of capitellid and dorvilleid polychaetes, and low macrofaunal species richness. Subtle impacts extended across farm lease areas in the form of depressed redox potential at 40 mm depth and changes to the macrobenthic community, including a prevalence of the dogwhelk Nassarius nigellus and a paucity of the heart urchin Brissus sp. and the maldanid polychaetes Asychis sp. and Rhodine sp. Minor farm effects were also evident at sites sampled 35 m outside farm lease boundaries, most notably as elevated population numbers of the polychaete Terrebellides sp., bivalve Mysella donaciformis and heart urchin Echinocardium cordatum. Amongst the univariate metrics examined, redox potential at 40 mm depth and the ratio of bivalves to total molluscs provided the most sensitive indicators of farm impacts, with the latter metric relatively insensitive to spatial variation between locations within the region studied. D 2005 Elsevier B.V. All rights reserved.
Subfields: Global and Planetary Change, Oceanography
View Paper: https://www.semanticscholar.org/paper/d13569a1bd1ffd3bf765ed74f12744bd0d59c01e
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In Global and Planetary Change
In Oceanography
Citations in the corpus
- Assessing the suitability of a range of benthic indices in the evaluation of environmental impact of fin and shellfish aquaculture located in sites across Europe (2009, unknown): “Finally, many other indicators and indices, such as diversity, richness, abundance, biomass, dominance, evenness, etc., have been investigated elsewhere in assessing aquaculture impacts (Jones, 2002; Hargrave, 2004; Edgar et al., 2005; Aguado-Giménez et al., 2007; Gibbs, 2007).”
- Open-water integrated multi-trophic aquaculture: environmental biomitigation and economic diversification of fed aquaculture by extractive aquaculture (2012, background): “…and ⁄ or biomass (typically pollution tolerant species) but not necessarily increases in biodiversity (Karakassis et al. 2000; Brooks et al. 2003; Edgar et al. 2005; Felsing et al. 2005; Klaoudatos et al. 2006; Dimitriadis & Koutsoubas 2008; Borja et al. 2009; Nickell et al. 2009; Vidovic et…”