Seawater carbonate chemistry and resource allocation and extracellular acid-base status in the sea urchin Strongylocentrotus droebachiensis during experiments, 2012

Anthropogenic CO2 emission will lead to an increase in seawater pCO2 of up to 80-100 Pa (800-1000 µatm) within this century and to an acidification of the oceans. Green sea urchins (Strongylocentrotus droebachiensis) occurring in Kattegat experience seasonal hypercapnic and hypoxic conditions already today. Thus, anthropogenic CO2 emissions will add up to existing values and will lead to even higher pCO2 values >200 Pa (>2000 µatm). To estimate the green sea urchins' potential to acclimate to acidified seawater, we calculated an energy budget and determined the extracellular acid base status of adult S. droebachiensis exposed to moderately (102 to 145 Pa, 1007 to 1431 µatm) and highly (284 to 385 Pa, 2800 to 3800 µatm) elevated seawater pCO2 for 10 and 45 days. […]

人为二氧化碳排放将使得本世纪内海水二氧化碳分压（seawater pCO2）升高至80~100 Pa（800~1000 µatm），并引发海洋酸化。目前栖息于卡特加特海峡的绿海胆（Strongylocentrotus droebachiensis）已面临季节性的高碳酸与低氧环境。因此，人为二氧化碳排放将叠加于现有环境水平，使得海水pCO2进一步升高至200 Pa以上（2000 µatm以上）。为评估绿海胆对酸化海水的驯化适应潜力，本研究计算了其能量收支，并测定了暴露于中等程度（102~145 Pa，1007~1431 µatm）与高度（284~385 Pa，2800~3800 µatm）升高的海水pCO2环境中10天与45天的成年S. droebachiensis的细胞外酸碱平衡状态。[…]