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Consequences of a simulated rapid ocean acidification event for benthic ecosystem processes and functions
Fiona Murray1, Stephen Widdicombe, C Louise McNeill
1Oceanlab, University of Aberdeen, Main Street, Newburgh, Aberdeenshire AB41 6AA, UK.
Marine Pollution Bulletin
|December 11, 2012
Summary
Rapid ocean acidification from sub-seabed carbon storage failure can alter benthic invertebrate behavior. While not lethal, these changes in species like Amphiura filiformis impact bioturbation and ecosystem functioning.
Area of Science:
- Marine Biology
- Oceanography
- Environmental Science
Background:
- Ocean acidification from atmospheric carbon dioxide (CO2) uptake is well-studied.
- Effects of rapid acidification, such as from sub-seabed carbon storage failure, are less understood.
Purpose of the Study:
- Investigate the impact of short-term severe acidification on benthic infauna.
- Assess effects on ecosystem processes like bioirrigation and sediment redistribution.
- Evaluate changes in nutrient concentrations.
Main Methods:
- Exposed Amphiura filiformis to acidified seawater for 8 days.
- Monitored bioirrigation, sediment particle redistribution, and nutrient concentrations.
- Observed behavioral changes and depth distribution within sediment.
Main Results:
- Amphiura filiformis displayed stress-induced behavioral changes.
- Bioturbation patterns were altered due to shifts in depth occupancy.
- Limited changes were observed in nutrient cycling.
- Reduced variability in A. filiformis depth distribution occurred.
Conclusions:
- Rapid acidification events may not be lethal to benthic invertebrates.
- Behavioral alterations can have long-term implications for species survival.
- Ecosystem structure and functioning may be impacted by rapid acidification events.
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