Abstract：
:The option of storing CO(2) in subsea rock formations to mitigate future increases in atmospheric CO(2) may induce problems for animals in the deep sea. In the present study the deep-sea bivalve Acesta excavata was subjected to environmental hypercapnia (pHSW 6.35, P(CO₂) =33,000 μatm) corresponding to conditions reported from natural CO(2) seeps. Effects on acid-base status and metabolic rate were related to time of exposure and subsequent recovery. During exposure there was an uncompensated drop in both hemolymph and intracellular pH. Intracellular pH returned to control values, while extracellular pH remained significantly lower during recovery. Intracellular non-bicarbonate buffering capacity of the posterior adductor muscle of hypercapnic animals was significantly lower than control values, but this was not the case for the remaining tissues analyzed. Oxygen consumption initially dropped by 60%, but then increased during the final stages of exposure, which may suggest a higher tolerance to hypercapnia than expected for a deep-living species.
journal_name
Mar Environ Resjournal_title
Marine environmental researchauthors
Hammer KM,Kristiansen E,Zachariassen KEdoi
10.1016/j.marenvres.2011.07.002subject
Has Abstractpub_date
2011-09-01 00:00:00pages
135-42issue
3eissn
0141-1136issn
1879-0291pii
S0141-1136(11)00085-7journal_volume
72pub_type
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