Effects of coastal acidification on North Atlantic bivalves: Interpreting laboratory responses in the context of in situ populations ...
Experimental exposure of early life stage bivalves has documented negative effects of elevated pCO2 on survival and growth, but the population consequences of these effects are unknown. We substituted laboratory responses into baseline population models of northern quahog Mercenaria mercenaria and b...
| Main Authors: | , , , , |
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| Format: | Text |
| Language: | English |
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Inter-Research
2020
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.17615/7bpg-6n33 https://cdr.lib.unc.edu/concern/articles/p26774861 |
| Summary: | Experimental exposure of early life stage bivalves has documented negative effects of elevated pCO2 on survival and growth, but the population consequences of these effects are unknown. We substituted laboratory responses into baseline population models of northern quahog Mercenaria mercenaria and bay scallop Argopecten irradians. The models were constructed using inverse demography with time series of size-structured field data from New York, USA, whereas the stress-response relationships were developed using data from published laboratory studies. We used stochastic projections and diffusion approximations of extinction probability to estimate cumulative risk of 50% population decline during 5 yr projections at pCO2 levels of 400, 800, and 1200 μatm. Although the A. irradians field population exhibited higher growth (12% yr-1) than the declining M. mercenaria population (-8% yr-1), cumulative risk was higher due to variance in the stochastic growth rate estimate (log λs = -0.02, σ2 = 0.24). This 5 yr risk ... |
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