Effects of fishing and acidification-related benthic mortality on the southeast Australian marine ecosystem

Griffith, Gary P., Fulton, Elizabeth A. and Richardson, Anthony J. (2011) Effects of fishing and acidification-related benthic mortality on the southeast Australian marine ecosystem. Global Change Biology, 17 10: 3058-3074. doi:10.1111/j.1365-2486.2011.02453.x

Author Griffith, Gary P.
Fulton, Elizabeth A.
Richardson, Anthony J.
Title Effects of fishing and acidification-related benthic mortality on the southeast Australian marine ecosystem
Journal name Global Change Biology   Check publisher's open access policy
ISSN 1354-1013
Publication date 2011-10
Sub-type Article (original research)
DOI 10.1111/j.1365-2486.2011.02453.x
Volume 17
Issue 10
Start page 3058
End page 3074
Total pages 17
Place of publication Oxford, U.K.
Publisher Wiley-Blackwell Publishing
Collection year 2012
Language eng
Formatted abstract
Oceanic uptake of anthropogenic carbon dioxide (CO2) is altering the carbonate chemistry of seawater, with potentially negative consequences for many calcifying marine organisms. At the same time, increasing fisheries exploitation is impacting on marine ecosystems. Here, using increased benthic-invertebrate mortality as a proxy for effects of ocean acidification, the potential impact of the two stressors of fishing and acidification on the southeast Australian marine ecosystem to year 2050 was explored. The individual and interaction effects of the two stressors on biomass and diversity were examined for the entire ecosystem and for regional assemblages. For 61 functional groups or species, the cumulative effects of moderate ocean acidification and fishing were additive (30%), synergistic (33%), and antagonistic (37%). Strong ocean acidification resulted in additive (22%), synergistic (40%), and antagonistic (38%) effects. The greatest impact was on the demersal food web, with fishing impacting predation and acidification affecting benthic production. Areas that have been subject to intensive fishing were the most susceptible to acidification effect, although fishing also mitigated some of the decline in biodiversity observed with moderate acidification. The model suggested that ocean acidification and long-term fisheries exploitation could act synergistically with the increasing sensitivity to change from long-term (decades) fisheries exploitation potentially causing unexpected restructuring of the pelagic and demersal food webs. Major regime shifts occur around year 2040. Greater focus is needed on how differential fisheries exploitation of marine resources may exacerbate or accelerate effects of environmental changes such as ocean acidification.
Keyword Cumulative and interactive impacts
Ecosystem modelling
Fisheries management
Ocean acidification
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
Official 2012 Collection
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Citation counts: TR Web of Science Citation Count  Cited 26 times in Thomson Reuters Web of Science Article | Citations
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