Impact of intentionally injected carbon dioxide hydrate on deep-sea benthic foraminiferal survival

Sequestration of carbon dioxide (CO2) in the ocean is being considered as a feasible mechanism to mitigate the alarming rate in its atmospheric rise. Little is known, however, about how the resulting hypercapnia and ocean acidification may affect marine fauna. In an effort to understand better the p...

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Vydané v:	Global change biology Ročník 15; číslo 8; s. 2078 - 2088
Hlavní autori:	BERNHARD, JOAN M., BARRY, JAMES P., BUCK, KURT R., STARCZAK, VICTORIA R.
Médium:	Journal Article
Jazyk:	English
Vydavateľské údaje:	Oxford, UK Blackwell Publishing Ltd 01.08.2009 Wiley-Blackwell
Predmet:	Acidification Animal and plant ecology Animal, plant and microbial ecology Aquatic ecosystems Aquatic life Biological and medical sciences California Carbon dioxide Carbon dioxide fixation carbon dioxide sequestration Carbon sequestration climate change Climatology. Bioclimatology. Climate change CO2 injection Deep sea direct contact Earth, ocean, space Exact sciences and technology experiment Exposure External geophysics Fauna foraminifera Fundamental and applied biological sciences. Psychology General aspects Greenhouse gases hypercapnia Marine meiofauna Meteorology Monterey Bay Ocean acidification Ocean bottom Ocean floor protist Survival Survival analysis survival rate Water depth Pacific Ocean Monterey Bay North Pacific INE, USA, California, Monterey Bay California ocean acidification Carbon dioxide Foraminifera Acidification Marine environment Aquatic environment Hypercapnia experiment protist pH Ocean Monterey Bay Benthic zone Meiofauna Protozoa carbon dioxide sequestration Fauna CO2 sequestration Deep water Injection CO Survival Dynamical climatology Climate change Global change
ISSN:	1354-1013, 1365-2486
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Shrnutí:	Sequestration of carbon dioxide (CO2) in the ocean is being considered as a feasible mechanism to mitigate the alarming rate in its atmospheric rise. Little is known, however, about how the resulting hypercapnia and ocean acidification may affect marine fauna. In an effort to understand better the protistan reaction to such an environmental perturbation, the survivorship of benthic foraminifera, which is a prevalent group of protists, was studied in response to deep‐sea CO2 release. The survival response of calcareous, agglutinated, and thecate foraminifera was determined in two experiments at ∼3.1 and 3.3 km water depth in Monterey Bay (California, USA). Approximately 5 weeks after initial seafloor CO2 release, in situ incubations of the live–dead indicator CellTracker Green were executed within seafloor‐emplaced pushcores. Experimental treatments included direct exposure to CO2 hydrate, two levels of lesser exposure adjacent to CO2 hydrate, and controls, which were far removed from the CO2 hydrate release. Results indicate that survivorship rates of agglutinated and thecate foraminifera were not significantly impacted by direct exposure but the survivorship of calcareous foraminifera was significantly lower in direct exposure treatments compared with controls. Observations suggest that, if large scale CO2 sequestration is enacted on the deep‐sea floor, survival of two major groups of this prevalent protistan taxon will likely not be severely impacted, while calcareous foraminifera will face considerable challenges to maintain their benthic populations in areas directly exposed to CO2 hydrate.
Bibliografia:	ark:/67375/WNG-LVF8CXB5-2 ArticleID:GCB1822 istex:5350F0990B757AD19B83A9FDA8F71112C9627A10 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 14 ObjectType-Article-2 content type line 23 ObjectType-Article-1 ObjectType-Feature-2
ISSN:	1354-1013 1365-2486
DOI:	10.1111/j.1365-2486.2008.01822.x