Physiological effects of hypercapnia in the deep-sea bivalve Acesta excavata (Fabricius, 1779) (Bivalvia; Limidae)

Karen M. Hammer, Erlend Kristiansen, Karl Erik Zachariassen

    Research output: Contribution to journalJournal articleResearchpeer-review

    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 mu atm) 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
    Original languageEnglish
    JournalMarine Environmental Research
    Volume72
    Issue number3
    Pages (from-to)135-142
    ISSN0141-1136
    DOIs
    Publication statusPublished - 2011

    Keywords

    • Acesta excavate
    • Deep-living bivalve
    • Hypercapnia
    • CO(2)
    • pH; Acid-base
    • Metabolism
    • Calcium

    Cite this

    Hammer, Karen M. ; Kristiansen, Erlend ; Zachariassen, Karl Erik. / Physiological effects of hypercapnia in the deep-sea bivalve Acesta excavata (Fabricius, 1779) (Bivalvia; Limidae). In: Marine Environmental Research. 2011 ; Vol. 72, No. 3. pp. 135-142 .
    @article{772cda9ea8c54f45b9c564288e32c2d2,
    title = "Physiological effects of hypercapnia in the deep-sea bivalve Acesta excavata (Fabricius, 1779) (Bivalvia; Limidae)",
    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 mu atm) 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",
    keywords = "Acesta excavate, Deep-living bivalve, Hypercapnia, CO(2), pH; Acid-base, Metabolism, Calcium",
    author = "Hammer, {Karen M.} and Erlend Kristiansen and Zachariassen, {Karl Erik}",
    year = "2011",
    doi = "10.1016/j.marenvres.2011.07.002",
    language = "English",
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    }

    Physiological effects of hypercapnia in the deep-sea bivalve Acesta excavata (Fabricius, 1779) (Bivalvia; Limidae). / Hammer, Karen M.; Kristiansen, Erlend; Zachariassen, Karl Erik.

    In: Marine Environmental Research, Vol. 72, No. 3, 2011, p. 135-142 .

    Research output: Contribution to journalJournal articleResearchpeer-review

    TY - JOUR

    T1 - Physiological effects of hypercapnia in the deep-sea bivalve Acesta excavata (Fabricius, 1779) (Bivalvia; Limidae)

    AU - Hammer, Karen M.

    AU - Kristiansen, Erlend

    AU - Zachariassen, Karl Erik

    PY - 2011

    Y1 - 2011

    N2 - 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 mu atm) 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

    AB - 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 mu atm) 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

    KW - Acesta excavate

    KW - Deep-living bivalve

    KW - Hypercapnia

    KW - CO(2)

    KW - pH; Acid-base

    KW - Metabolism

    KW - Calcium

    U2 - 10.1016/j.marenvres.2011.07.002

    DO - 10.1016/j.marenvres.2011.07.002

    M3 - Journal article

    VL - 72

    SP - 135

    EP - 142

    JO - Marine Environmental Research

    JF - Marine Environmental Research

    SN - 0141-1136

    IS - 3

    ER -