The effects of temperature and pCO2 on the size, thermal tolerance and metabolic rate of the red sea urchin (Mesocentrotus franciscanus) during early development
The effects of temperature and pCO2 on the size, thermal tolerance and metabolic rate of the red sea urchin (Mesocentrotus franciscanus) during early development
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DOI：
10.1007/s00227-019-3633-y
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发表时间：
2020-02
期刊：
影响因子：
2.4
通讯作者：
Juliet M. Wong;G. Hofmann
中科院分区：
文献类型：
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作者：
Juliet M. Wong;G. Hofmann
红海胆Mesocentrotus franciscanus支持着北美西海岸沿着的一种非常有价值的野生渔业，但是尽管它在海带森林生态学中的重要性，并且作为一种收获的物种，人们对M. Franciscanus在其早期发展过程中对与海洋变暖和酸化有关的非生物压力作出反应。这里，M. Franciscanus在两种温度（13 °C和17 °C）和两种CO2水平（475 μatm和1050 μatm）的组合下饲养，代表了当前和未来的沿海环境。pCO2水平升高导致原肠胚期胚胎的体型减小，而温度没有影响。在棱柱阶段，温度和pCO2都影响身体大小。较高的温度增加了棱柱期胚胎的体型，抵消了pCO2升高对生长的抑制作用。热耐受性，这是通过暴露棱镜阶段胚胎的温度范围和估计的存活率估计，被认为是在温暖的温度下提出的略高。发育温度和pCO2的条件下，胚胎提出没有影响代谢率测定的耗氧率在棱柱阶段。这项研究提供了重要的见解，一个物种的高生态和经济价值。总体而言，在pCO2升高条件下的早期发育可能会对M产生不利影响。而适度的变暖可能会改善生长和耐热性。了解渔业物种如何应对非生物压力，将有助于我们预测气候变化将如何影响未来种群的能力，这与可持续性和粮食安全等问题有关。
The red sea urchinMesocentrotus franciscanussupports a highly valuable wild fishery along the West Coast of North America, but despite its importance in the ecology of kelp forests and as a harvested species, little is known about howM. franciscanusresponds to abiotic stressors associated with ocean warming and acidification during its early development. Here, embryos ofM. franciscanuswere raised under combinations of two temperatures (13 °C and 17 °C) and twopCO2levels (475 μatm and 1050 μatm) that represent current and future coastal environments. ElevatedpCO2levels led to a decrease in body size of gastrula stage embryos while temperature had no effect. At the prism stage, both temperature andpCO2affected body size. The warmer temperature increased the body size of prism stage embryos, offsetting the stunting effect of elevatedpCO2on growth. Thermal tolerance, which was estimated by exposing prism stage embryos to a range of temperatures and estimating the survivorship, was found to be slightly higher in those raised under warmer temperatures. The developmental temperature andpCO2conditions under which embryos were raised did not have an effect on the metabolic rate as measured by oxygen consumption rate at the prism stage. This study provides important insights into a species of high ecological and economic value. Overall, early development under elevatedpCO2conditions may adversely impactM. franciscanuswhile moderate warming may improve growth and thermal tolerance. Understanding how fishery species respond to abiotic stressors will facilitate our predictive capacity of how climate change will impact future populations, which links to issues such as sustainability and food security.