Data from: Population-dependent effects of ocean acidification

Understanding the response of marine fauna to this change is critical for understanding the effects of OA. Population level variation in OA tolerance is highly relevant and important in the determination of ecosystem resilience and persistence, but has received little focus to date. In this study, whether OA has the same biological consequences in high salinity-acclimated population vs a low-salinity acclimated population of the same species was investigated in the marine isopod Idotea balthica. The populations were found to have physiologically different responses to ocean acidification. While survival rate was similar between the two study populations at a future CO2 level of 1000 ppm and both populations showed increased oxidative stress, the metabolic rate and osmoregulatory activity differed significantly between the two populations. The results of this study demonstrate that the physiological response to OA of populations from different salinities can vary. Population level variation, and the environment provenance of individuals used in OA experiments should be taken into account for the evaluation and prediction of climate change effects.

厘清海洋动物类群对环境变化的响应，对于认识海洋酸化（Ocean Acidification，OA）的影响至关重要。种群水平的酸化耐受差异，对判断生态系统恢复力与存续能力具有关键意义，但迄今相关研究尚未受到足够关注。本研究以海洋等足类动物浪飘水虱（Idotea balthica）为研究对象，探究了同一物种的高盐驯化种群与低盐驯化种群在海洋酸化作用下是否会产生一致的生物学效应。研究结果显示，两类种群对海洋酸化的生理响应存在显著分化。当未来大气二氧化碳浓度达到1000ppm时，两个研究种群的存活率并无显著差异，且均表现出氧化应激水平升高的特征，但二者的代谢速率与渗透调节活性却存在显著差异。本研究结果表明，不同盐度环境来源的种群，其对海洋酸化的生理响应可能存在差异。因此，在评估与预测气候变化的生态影响时，应充分考虑种群水平的差异，以及海洋酸化实验所用个体的原生环境背景。