Department of Marine Sciences, University of Connecticut, 1080 Shennecossett Road, 06340 Groton, CT,, USA
Department of Marine Sciences, University of Connecticut, 1080 Shennecossett Road, 06340 Groton, CT,, USA.
Biol Lett. 2018 Nov 28;14(11):20180408. doi: 10.1098/rsbl.2018.0408.
Despite the remarkable expansion of laboratory studies, robust estimates of single species CO sensitivities remain largely elusive. We conducted a meta-analysis of 20 CO exposure experiments conducted over 6 years on offspring of wild Atlantic silversides () to robustly constrain CO effects on early life survival and growth. We conclude that early stages of this species are generally tolerant to CO levels of approximately 2000 µatm, likely because they already experience these conditions on diel to seasonal timescales. Still, high CO conditions measurably reduced fitness in this species by significantly decreasing average embryo survival (-9%) and embryo+larval survival (-13%). Survival traits had much larger coefficients of variation (greater than 30%) than larval length or growth (3-11%). CO sensitivities varied seasonally and were highest at the beginning and end of the species' spawning season (April-July), likely due to the combined effects of transgenerational plasticity and maternal provisioning. Our analyses suggest that serial experimentation is a powerful, yet underused tool for robustly estimating small but true CO effects in fish early life stages.
尽管实验室研究取得了显著进展，但对于单一物种对 CO 的敏感性的可靠估计仍然难以确定。我们对 6 年来在野生大西洋鲱（）的后代身上进行的 20 项 CO 暴露实验进行了荟萃分析，以可靠地约束 CO 对早期生存和生长的影响。我们得出的结论是，该物种的早期阶段通常对大约 2000µatm 的 CO 水平具有耐受性，这可能是因为它们已经在日至季节性的时间尺度上经历了这些条件。尽管如此，高 CO 条件显著降低了该物种的适应度，平均胚胎存活率降低了 9%（-9%），胚胎+幼鱼存活率降低了 13%（-13%）。与幼鱼长度或生长（3-11%）相比，生存特征的变异系数（大于 30%）要大得多。CO 敏感性具有季节性变化，在物种产卵季节（4 月至 7 月）的开始和结束时最高，这可能是由于跨代可塑性和母体供应的综合影响。我们的分析表明，连续实验是一种强大但未被充分利用的工具，可用于可靠地估计鱼类早期生活阶段中微小但真实的 CO 影响。
