Laboratoire de Biologie Marine, Université Libre de Bruxelles, CP 160/15, avenue F.D. Roosevelt 50, 1050 Bruxelles, Belgium.
Mar Pollut Bull. 2011 Jan;62(1):48-54. doi: 10.1016/j.marpolbul.2010.09.012. Epub 2010 Oct 14.
The effect of pH ranging from 8.0 to 6.8 (total scale - pH(T)) on fertilization, cleavage and larval development until pluteus stage was assessed in an intertidal temperate sea urchin. Gametes were obtained from adults collected in two contrasting tide pools, one showing a significant nocturnal pH decrease (lowest pH(T)=7.4) and another where pH was more stable (lowest pH(T)=7.8). The highest pH(T) at which significant effects on fertilization and cleavage were recorded was 7.6. On the contrary, larval development was only affected below pH(T) 7.4, a value equal or lower than that reported for several subtidal species. This suggests that sea urchins inhabiting stressful intertidal environments produce offspring that may better resist future ocean acidification. Moreover, at pH(T) 7.4, the fertilization rate of gametes whose progenitors came from the tide pool with higher pH decrease was significantly higher, indicating a possible acclimatization or adaptation of gametes to pH stress.
研究了从 pH8.0 到 6.8（总标度-pH（T））的 pH 值对潮间带温带海胆受精、卵裂和幼虫发育到浮游幼虫阶段的影响。从在两个具有显著昼夜 pH 值下降（最低 pH（T）=7.4）和另一个 pH 值更稳定（最低 pH（T）=7.8）的潮池收集的成体中获得配子。记录到受精和卵裂有显著影响的最高 pH（T）为 7.6。相反，只有在 pH（T）低于 7.4 时才会影响幼虫发育，这个值等于或低于几个亚潮带物种的报道值。这表明，栖息在压力较大的潮间带环境中的海胆所产生的后代可能更能抵抗未来的海洋酸化。此外，在 pH（T）为 7.4 时，来自 pH 值下降幅度较大的潮池的配子的受精率显著更高，表明配子可能对 pH 值胁迫有一定的适应或适应能力。
