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


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dc.contributor.author Bernhard, Joan M.
dc.contributor.author Barry, James P.
dc.contributor.author Buck, Kurt R.
dc.contributor.author Starczak, Victoria R.
dc.date.accessioned 2009-08-24T15:51:35Z
dc.date.available 2009-08-24T15:51:35Z
dc.date.issued 2008-10
dc.identifier.uri http://hdl.handle.net/1912/2932
dc.description Author Posting. © The Authors, 2009. This is the author's version of the work. It is posted here by permission of Blackwell for personal use, not for redistribution. The definitive version was published in Global Change Biology 15 (2009): 2078-2088, doi:10.1111/j.1365-2486.2008.01822.x. en
dc.description.abstract 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 five 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 to 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. en
dc.description.sponsorship This work was funded by the Monterey Bay Aquarium Research Institute (project 200002; to JPB), US Department of Energy grant # DE-FG02-03ER63696 (to J. P. Kennett and J.M.B.), and NSF OCE-0725966 (to J.M.B.). en
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.relation.uri http://dx.doi.org/10.1111/j.1365-2486.2008.01822.x
dc.subject Carbon dioxide sequestration en
dc.subject CO2 injection en
dc.subject Climate change en
dc.subject Foraminifera en
dc.subject Experiment en
dc.subject Hypercapnia en
dc.subject Meiofauna en
dc.subject Monterey Bay en
dc.subject Ocean acidification en
dc.subject Protist en
dc.title Impact of intentionally injected carbon dioxide hydrate on deep-sea benthic foraminiferal survival en
dc.type Preprint en

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