Department of Biology and Chemistry, City University of Hong Kong, Hong Kong, China.
Department of Biology and Chemistry, City University of Hong Kong, Hong Kong, China; State Key Laboratory in Marine Pollution, City University of Hong Kong, Hong Kong, China.
Mar Pollut Bull. 2014 Feb 15;79(1-2):39-46. doi: 10.1016/j.marpolbul.2014.01.008. Epub 2014 Jan 20.
The tolerance and physiological responses of the larvae of two congeneric gastropods, the intertidal Nassarius festivus and subtidal Nassarius conoidalis, to the combined effects of ocean acidification (pCO2 at 380, 950, 1250 ppm), temperature (15, 30°C) and salinity (10, 30 psu) were compared. Results of three-way ANOVA on cumulative mortality after 72-h exposure showed significant interactive effects in which mortality increased with pCO2 and temperature, but reduced at higher salinity for both species, with higher mortality being obtained for N. conoidalis. Similarly, respiration rate of the larvae increased with temperature and pCO2 level for both species, with a larger percentage increase for N. conoidalis. Larval swimming speed increased with temperature and salinity for both species whereas higher pCO2 reduced swimming speed in N. conoidalis but not N. festivus. The present findings indicated that subtidal congeneric species are more sensitive than their intertidal counterparts to the combined effects of these stressors.
研究了两种同源腹足纲动物——潮间带的 Nassarius festivus 和亚潮带的 Nassarius conoidalis 的幼虫对海洋酸化（pCO2 为 380、950 和 1250 ppm）、温度（15 和 30°C）和盐度（10 和 30 psu）综合影响的耐受性和生理反应。72 小时暴露后，对累积死亡率进行三因素方差分析的结果表明，死亡率随着 pCO2 和温度的升高而升高，但在高盐度下降低，两种物种的死亡率均升高，Nassarius conoidalis 的死亡率更高。同样，两种物种的幼虫呼吸率均随温度和 pCO2 水平的升高而升高，Nassarius conoidalis 的升高幅度更大。两种物种的幼虫游泳速度均随温度和盐度的升高而升高，而较高的 pCO2 降低了 Nassarius conoidalis 的游泳速度，但对 Nassarius festivus 没有影响。本研究结果表明，与潮间带同类物种相比，亚潮带同类物种对这些胁迫因素的综合影响更为敏感。
