期刊
JOURNAL OF EXPERIMENTAL BIOLOGY
卷 206, 期 4, 页码 641-650出版社
COMPANY BIOLOGISTS LTD
DOI: 10.1242/jeb.00141
关键词
carbon dioxide; global warming; deep sea; hypercapnia; acid-base balance; sequestration; cephalopoda; metabolism
类别
资金
- NIEHS NIH HHS [ES05705] Funding Source: Medline
A recent proposal to store anthropogenic carbon dioxide in the deep ocean is assessed here with regard to the impacts on deep-living fauna. The stability of the deepsea has allowed the evolution of species ill-equipped to withstand rapid environmental changes. Low metabolic rates of most deep-sea species are correlated with low capacities for pH buffering and low concentrations of ion-transport proteins. Changes in seawater carbon dioxide partial pressure (Pco(2)) may thus lead to large cellular Pco(2) and pH changes. Oxygen transport proteins of deepsea animals are also highly sensitive to changes in pH. Acidosis leads to metabolic suppression, reduced protein synthesis, respiratory stress, reduced metabolic scope and, ultimately, death. Deep-sea CO2 injection as a means of controlling atmospheric CO2 levels should be assessed with careful consideration of potential biological impacts. In order to properly evaluate the risks within a relevant timeframe, a much more aggressive approach to research is warranted.
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