Differential response to ocean acidification in physiological traits of Concholepas concholepas populations
Differential response to ocean acidification in physiological traits of Concholepas concholepas populations
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DOI：
10.1016/j.seares.2014.03.010
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发表时间：
2014-07-01
影响因子：
2
通讯作者：
Lagos, Nelson A.
中科院分区：
文献类型：
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作者：
Lardies, Marco A.;Belen Arias, Maria;Lagos, Nelson A.
对环境波动的表型适应经常通过预先存在的可塑性发生，其作为生理多样性变化的主要组成部分的作用正被广泛认识。很少有研究考虑海洋钙化菌对海洋酸化预测的地理种群表型灵活性的变化，尽管这种类型的研究提供了关于生物体如何应对海洋中这种化学变化的理解。我们研究了地理变化的CO2海水浓度的表型和生理特性的反应规范使用实验室围隔方法与短期驯化在两个对比种群（Antofagasta和Calfuco）的潮间带蜗牛Concholepas concholepas。我们的研究结果表明，pCO（2）升高的条件下增加标准代谢率在两个群体的蜗牛青少年，可能是由于更高的能量成本的稳态。与Antofagasta（北方）种群相比，Calfuco（南方）种群中的C concholepas幼鱼在高pCO（2）环境中表现出较低的代谢率增量，这与较低的热休克蛋白基因表达一致。综合这些结果表明，海洋酸化对C.贝壳。最后，在两个研究性状中显著的群体x pCO（2）水平的相互作用表明，在高pCO（2）条件下，群体之间存在变异。(C)2014 Elsevier BM. All rights reserved.
Phenotypic adaptation to environmental fluctuations frequently occurs by preexisting plasticity and its role as a major component of variation in physiological diversity is being widely recognized. Few studies have considered the change in phenotypic flexibility among geographic populations in marine calcifiers to ocean acidification projections, despite the fact that this type of study provides understanding about how the organism may respond to this chemical change in the ocean. We examined the geographic variation in CO2 seawater concentrations in the phenotype and in the reaction norm of physiological traits using a laboratory mesocosm approach with short-term acclimation in two contrasting populations (Antofagasta and Calfuco) of the intertidal snail Concholepas concholepas. Our results show that elevated pCO(2) conditions increase standard metabolic rates in both populations of the snail juveniles, likely due to the higher energy cost of homeostasis. juveniles of C concholepas in the Calfuco (southern) population showed a lower increment of metabolic rate in high-pCO(2) environments concordant with a lesser gene expression of a heat shock protein with respect to the Antofagasta (northern) population. Combined these results indicate a negative effect of ocean acidification on whole-organism functioning of C. concholepas. Finally, the significant Population x pCO(2) level interaction in both studied traits indicates that there is variation between populations in response to high-pCO(2) conditions. (C) 2014 Elsevier BM. All rights reserved.