Adaptive capacity of the habitat modifying sea urchin Centrostephanus rodgersii to ocean warming and ocean acidification: performance of early embryos.
Adaptive capacity of the habitat modifying sea urchin Centrostephanus rodgersii to ocean warming and ocean acidification: performance of early embryos.
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DOI：
10.1371/journal.pone.0042497
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发表时间：
2012
期刊：
影响因子：
3.7
通讯作者：
Byrne M
中科院分区：
文献类型：
--
作者：
Foo SA;Dworjanyn SA;Poore AG;Byrne M
预测快速气候变化对种群的影响取决于测量气候压力源对表现和适应潜力的影响。适应紧张的气候条件需要种群中存在的可遗传的抗逆性遗传变异。我们量化了具有重要生态意义的海胆（Centrostephanus rodgersii）早期发育对近未来（2100年）澳大利亚东南部全球变化热点海洋条件的耐受性遗传变异。通过多个坝系杂交，对27个家族品系的增温（+ 2-4°C）和酸化（−0.3 - 0.5 pH单位）的交互效应进行了量化。酸化降低了卵裂期胚胎的百分比，而温度没有降低。相反，温度而非酸化降低了原肠胚的百分比。在这两种应激条件下，卵裂的成功与否都受到雄性身份的强烈影响。父系和母系身份显著影响原肠胚形成，并与温度相互作用决定发育成功。原肠胚形成的正遗传相关性表明，在较低pH下表现良好的基因型在较高温度下也表现良好。在原肠胚形成时，两种应激源对环境相互作用的显著基因型（父系）表明，胚胎在耐热性和对环境变化的反应能力方面存在遗传变异。大坝的显著影响可能是由于母体供给（母体基因型或环境）和/或后代基因型。这种具有重要生态意义的海胆的早期发育似乎并不局限于适应海洋变暖和酸化的多重压力。耐受性基因型的存在表明有可能适应同时变暖和酸化，有助于C. rodgersii在不断变化的海洋中的恢复力。
Predicting effects of rapid climate change on populations depends on measuring the effects of climate stressors on performance, and potential for adaptation. Adaptation to stressful climatic conditions requires heritable genetic variance for stress tolerance present in populations. We quantified genetic variation in tolerance of early development of the ecologically important sea urchin Centrostephanus rodgersii to near-future (2100) ocean conditions projected for the southeast Australian global change hot spot. Multiple dam-sire crosses were used to quantify the interactive effects of warming (+2–4°C) and acidification (−0.3−0.5 pH units) across twenty-seven family lines. Acidification, but not temperature, decreased the percentage of cleavage stage embryos. In contrast, temperature, but not acidification decreased the percentage of gastrulation. Cleavage success in response to both stressors was strongly affected by sire identity. Sire and dam identity significantly affected gastrulation and both interacted with temperature to determine developmental success. Positive genetic correlations for gastrulation indicated that genotypes that did well at lower pH also did well in higher temperatures. Significant genotype (sire) by environment interactions for both stressors at gastrulation indicated the presence of heritable variation in thermal tolerance and the ability of embryos to respond to changing environments. The significant influence of dam may be due to maternal provisioning (maternal genotype or environment) and/or offspring genotype. It appears that early development in this ecologically important sea urchin is not constrained in adapting to the multiple stressors of ocean warming and acidification. The presence of tolerant genotypes indicates the potential to adapt to concurrent warming and acidification, contributing to the resilience of C. rodgersii in a changing ocean.
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DOI：
10.1098/rspb.2012.0181
发表时间：
2012-07-22
影响因子：
4.7
作者：
Evans, Jonathan P.;Garcia-Gonzalez, Francisco;Fitzpatrick, John L.
通讯作者：
Fitzpatrick, John L.
影响因子：
2.4
作者：
Ericson, Jessica A.;Lamare, Miles D.;Barker, Mike F.
通讯作者：
Barker, Mike F.
影响因子：
3.3
作者：
Doo, Steve S.;Dworjanyn, Symon A.;Byrne, Maria
通讯作者：
Byrne, Maria
影响因子：
2.4
作者：
Byrne, M.;Prowse, T. A. A.;Vaitilingon, D.
通讯作者：
Vaitilingon, D.
影响因子：
5.4
作者：
EISEN, EJ;SAXTON, AM
通讯作者：
SAXTON, AM