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

Karen M. Hammer, Erlend Kristiansen, Karl Erik Zachariassen

    Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

    Resumé

    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
    OriginalsprogEngelsk
    TidsskriftMarine Environmental Research
    Vol/bind72
    Udgave nummer3
    Sider (fra-til)135-142
    ISSN0141-1136
    DOI
    StatusUdgivet - 2011

    Emneord

      Citer dette

      Hammer, Karen M. ; Kristiansen, Erlend ; Zachariassen, Karl Erik. / Physiological effects of hypercapnia in the deep-sea bivalve Acesta excavata (Fabricius, 1779) (Bivalvia; Limidae). I: Marine Environmental Research. 2011 ; Bind 72, Nr. 3. s. 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",
      volume = "72",
      pages = "135--142",
      journal = "Marine Environmental Research",
      issn = "0141-1136",
      publisher = "Elsevier Ltd",
      number = "3",

      }

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

      I: Marine Environmental Research, Bind 72, Nr. 3, 2011, s. 135-142 .

      Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer 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 -