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Sökning: WFRF:(Campanati C.)

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1.
  • Campanati, C., et al. (författare)
  • Differential sensitivity of larvae to ocean acidification in two interacting mollusc species
  • 2018
  • Ingår i: Marine Environmental Research. - : Elsevier BV. - 0141-1136. ; 141, s. 66-74
  • Tidskriftsartikel (refereegranskat)abstract
    • Anthropogenically-induced ocean acidification (OA) scenarios of decreased pH and altered carbonate chemistry are threatening the fitness of coastal species and hence near-shore ecosystems' biodiversity. Differential tolerances to OA between species at different trophic levels, for example, may alter species interactions and impact community stability. Here we evaluate the effect of OA on the larval stages of the rock oyster, Saccostrea cucullata, a dominant Indo-Pacific ecosystem engineer, and its key predator, the whelk, Reishia clavigera. pH as low as 7.4 had no significant effect on mortality, abnormality or growth of oyster larvae, whereas whelk larvae exposed to pH 7.4 experienced increased mortality (up to similar to 30%), abnormalities (up to 60%) and similar to 3 times higher metabolic rates compared to controls. Although these impacts' long-term consequences are yet to be investigated, greater vulnerability of whelk larvae to OA could impact predation rates on intertidal rocky shores, and have implications for subsequent community dynamics.
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2.
  • Ko, W.K.K.G., et al. (författare)
  • Interactive effects of ocean acidificaiton, elevated temperature, and reduced salinity on early-life stages of the Pacific oyster
  • 2014
  • Ingår i: Environmental Science and Technology. - : American Chemical Society (ACS). - 0013-936X .- 1520-5851. ; 48:17, s. 10079-10088
  • Tidskriftsartikel (refereegranskat)abstract
    • Ocean acidification (OA) effects on larvae blamed for the rapidly declining oyster production in the Pacific Northwest region of the United States. This is a serious issue in China which produces over 80% of the world’s oysters. Because climate-related stressors rarely act alone, we need to consider OA in combination with warming and reduced salinity. Here, the interactive effects of these three climate-related stressors on the larval growth of Crassostrea gigas were examined. Larvae were cultured in combinations of temperature (24oC and 30oC), pH (pH 8.1 and 7.4), and salinity (15 and 25 psu) for 58 days to the early juvenile stage. Decreased pH (pH 7.4), elevated temperature (30oC) and reduced salinity (15 psu) significantly delayed pre- and post-settlement growth. Elevated temperature lowered the larval lipid index, a proxy for physiological quality, and rescued the negative effects of decreased pH on attachment and metamorphosis only in a salinity of 25 psu. The negative effects of multiple stressors on larval metamorphosis were not due to poor physiological quality, reduced size, or depleted lipid reserves at the time of metamorphosis. Our results support the hypothesis that the C.gigas larvae are vulnerable to the interactions of OA with reduced salinity and warming in Yellow Sea coastal waters now and in the future.
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3.
  • Lane, A., et al. (författare)
  • Trans-generational responses to low pH depend on parental gender in a calcifying tubeworm
  • 2015
  • Ingår i: Scientific Reports. - : Springer Science and Business Media LLC. - 2045-2322. ; 5
  • Tidskriftsartikel (refereegranskat)abstract
    • The uptake of anthropogenic CO2 emissions by oceans has started decreasing pH and carbonate ion concentrations of seawater, a process called ocean acidification (OA). Occurring over centuries and many generations, evolutionary adaptation and epigenetic transfer will change species responses to OA over time. Trans-generational responses, via genetic selection or trans-generational phenotypic plasticity, differ depending on species and exposure time as well as differences between individuals such as gender. Males and females differ in reproductive investment and egg producing females may have less energy available for OA stress responses. By crossing eggs and sperm from the calcareous tubeworm Hydroides elegans (Haswell, 1883) raised in ambient (8.1) and low (7.8) pH environments, we observed that paternal and maternal low pH experience had opposite and additive effects on offspring. For example, when compared to offspring with both parents from ambient pH, growth rates of offspring of fathers or mothers raised in low pH were higher or lower respectively, but there was no difference when both parents were from low pH. Gender differences may result in different selection pressures for each gender. This may result in overestimates of species tolerance and missed opportunities of potentially insightful comparisons between individuals of the same species.
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  • Resultat 1-3 av 3
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Campanati, C. (3)
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