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Complex responses of intertidal molluscan embryos to a warming and acidifying ocean in the presence of UV radiation

Journal Article


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Abstract


  • Climate change and ocean acidification will expose marine organisms to synchronous multiple stressors, with early life

    stages being potentially most vulnerable to changing environmental conditions. We simultaneously exposed encapsulated

    molluscan embryos to three abiotic stressors—acidified conditions, elevated temperate, and solar UV radiation in large

    outdoor water tables in a multifactorial design. Solar UV radiation was modified with plastic filters, while levels of the other

    factors reflected IPCC predictions for near-future change. We quantified mortality and the rate of embryonic development

    for a mid-shore littorinid, Bembicium nanum, and low-shore opisthobranch, Dolabrifera brazieri. Outcomes were consistent

    for these model species with embryos faring significantly better at 26uC than 22uC. Mortality sharply increased at the lowest

    temperature (22uC) and lowest pH (7.6) examined, producing a significant interaction. Under these conditions mortality

    approached 100% for each species, representing a 2- to 4-fold increase in mortality relative to warm (26uC) non-acidified

    conditions. Predictably, development was more rapid at the highest temperature but this again interacted with acidified

    conditions. Development was slowed under acidified conditions at the lowest temperature. The presence of UV radiation

    had minimal impact on the outcomes, only slowing development for the littorinid and not interacting with the other

    factors. Our findings suggest that a warming ocean, at least to a threshold, may compensate for the effects of decreasing pH

    for some species. It also appears that stressors will interact in complex and unpredictable ways in a changing climate.

UOW Authors


  •   Davis, Andrew
  •   Coleman, Daniel W. (external author)
  •   Broad, Allison (external author)
  •   Byrne, Maria (external author)
  •   Dworjanyn, Symon A. (external author)
  •   Przeslawski, Rachel (external author)

Publication Date


  • 2013

Citation


  • Davis, A. R., Coleman, D., Broad, A., Byrne, M., Dworjanyn, S. A. & Przeslawski, R. (2013). Complex responses of intertidal molluscan embryos to a warming and acidifying ocean in the presence of UV radiation. PLoS One, 8 (2), e55939-1-e55939-7.

Scopus Eid


  • 2-s2.0-84873537766

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1136&context=smhpapers

Ro Metadata Url


  • http://ro.uow.edu.au/smhpapers/137

Has Global Citation Frequency


Start Page


  • e55939-1

End Page


  • e55939-7

Volume


  • 8

Issue


  • 2

Place Of Publication


  • United States

Abstract


  • Climate change and ocean acidification will expose marine organisms to synchronous multiple stressors, with early life

    stages being potentially most vulnerable to changing environmental conditions. We simultaneously exposed encapsulated

    molluscan embryos to three abiotic stressors—acidified conditions, elevated temperate, and solar UV radiation in large

    outdoor water tables in a multifactorial design. Solar UV radiation was modified with plastic filters, while levels of the other

    factors reflected IPCC predictions for near-future change. We quantified mortality and the rate of embryonic development

    for a mid-shore littorinid, Bembicium nanum, and low-shore opisthobranch, Dolabrifera brazieri. Outcomes were consistent

    for these model species with embryos faring significantly better at 26uC than 22uC. Mortality sharply increased at the lowest

    temperature (22uC) and lowest pH (7.6) examined, producing a significant interaction. Under these conditions mortality

    approached 100% for each species, representing a 2- to 4-fold increase in mortality relative to warm (26uC) non-acidified

    conditions. Predictably, development was more rapid at the highest temperature but this again interacted with acidified

    conditions. Development was slowed under acidified conditions at the lowest temperature. The presence of UV radiation

    had minimal impact on the outcomes, only slowing development for the littorinid and not interacting with the other

    factors. Our findings suggest that a warming ocean, at least to a threshold, may compensate for the effects of decreasing pH

    for some species. It also appears that stressors will interact in complex and unpredictable ways in a changing climate.

UOW Authors


  •   Davis, Andrew
  •   Coleman, Daniel W. (external author)
  •   Broad, Allison (external author)
  •   Byrne, Maria (external author)
  •   Dworjanyn, Symon A. (external author)
  •   Przeslawski, Rachel (external author)

Publication Date


  • 2013

Citation


  • Davis, A. R., Coleman, D., Broad, A., Byrne, M., Dworjanyn, S. A. & Przeslawski, R. (2013). Complex responses of intertidal molluscan embryos to a warming and acidifying ocean in the presence of UV radiation. PLoS One, 8 (2), e55939-1-e55939-7.

Scopus Eid


  • 2-s2.0-84873537766

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1136&context=smhpapers

Ro Metadata Url


  • http://ro.uow.edu.au/smhpapers/137

Has Global Citation Frequency


Start Page


  • e55939-1

End Page


  • e55939-7

Volume


  • 8

Issue


  • 2

Place Of Publication


  • United States