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    Metabolic suppression in thecosomatous pteropods as an effect of low temperature and hypoxia in the eastern tropical North Pacific

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    Maas et al (MABI-D-12-00193) for WHOAS.pdf (579.9Kb)
    Date
    2011-10
    Author
    Maas, Amy E.  Concept link
    Wishner, Karen F.  Concept link
    Seibel, Brad A.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/5472
    As published
    https://doi.org/10.1007/s00227-012-1982-x
    Abstract
    Many pteropod species in the eastern tropical north Pacific Ocean migrate vertically each day, transporting organic matter and respiratory carbon below the thermocline. These migrations take species into cold (15-10ºC) hypoxic water (< 20 µmol O2 kg-1) at depth. We measured the vertical distribution, oxygen consumption and ammonia excretion for seven species of pteropod, some of which migrate and some which remain in oxygenated surface waters throughout the day. Within the upper 200 meters of the water column, changes in water temperature result in a ~60-75% reduction in respiration for most species. All three species tested under hypoxic conditions responded to low O2 with an additional ~35-50% reduction in respiratory rate. Combined, low temperature and hypoxia suppress the metabolic rate of pteropods by ~80-90%. These results shed light on the ways in which expanding regions of hypoxia and surface ocean warming may impact pelagic ecology.
    Description
    Author Posting. © The Author(s), 2011. This is the author's version of the work. It is posted here by permission of Springer for personal use, not for redistribution. The definitive version was published in Marine Biology 159 (2012): 1955-1967, doi:10.1007/s00227-012-1982-x.
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    Suggested Citation
    Preprint: Maas, Amy E., Wishner, Karen F., Seibel, Brad A., "Metabolic suppression in thecosomatous pteropods as an effect of low temperature and hypoxia in the eastern tropical North Pacific", 2011-10, https://doi.org/10.1007/s00227-012-1982-x, https://hdl.handle.net/1912/5472
     
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