The Swire Institute of Marine Science and School of Biological Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong, China.
Department of Biological and Environmental Sciences, University of Gothenburg, The Sven Lovén Centre for Marine Infrastructure, Kristineberg, Fiskebäckskil, 45178, Sweden.
Mar Environ Res. 2018 Oct;141:66-74. doi: 10.1016/j.marenvres.2018.08.005. Epub 2018 Aug 11.
Anthropogenically-induced ocean acidification (OA) scenarios of decreased pH and altered carbonate chemistry are threatening the fitness of coastal species and hence near-shore ecosystems' biodiversity. Differential tolerances to OA between species at different trophic levels, for example, may alter species interactions and impact community stability. Here we evaluate the effect of OA on the larval stages of the rock oyster, Saccostrea cucullata, a dominant Indo-Pacific ecosystem engineer, and its key predator, the whelk, Reishia clavigera. pH as low as 7.4 had no significant effect on mortality, abnormality or growth of oyster larvae, whereas whelk larvae exposed to pH 7.4 experienced increased mortality (up to ∼30%), abnormalities (up to 60%) and ∼3 times higher metabolic rates compared to controls. Although these impacts' long-term consequences are yet to be investigated, greater vulnerability of whelk larvae to OA could impact predation rates on intertidal rocky shores, and have implications for subsequent community dynamics.
人为引起的海洋酸化（OA）导致 pH 值和碳酸盐化学变化的情景正在威胁沿海物种的适应性，从而影响近岸生态系统的生物多样性。例如，不同营养级别的物种对 OA 的不同耐受程度可能会改变物种间的相互作用并影响群落稳定性。在这里，我们评估了海洋酸化对石蚝（Saccostrea cucullata）幼虫阶段的影响，石蚝是印度洋-太平洋生态系统的主要工程物种，而其关键捕食者是笠贝（Reishia clavigera）。pH 值低至 7.4 对牡蛎幼虫的死亡率、畸形或生长没有显著影响，而暴露在 pH 值为 7.4 的笠贝幼虫死亡率（高达约 30%）、畸形率（高达 60%）和代谢率比对照组高约 3 倍。虽然这些影响的长期后果尚未得到调查，但笠贝幼虫对 OA 的更大脆弱性可能会影响潮间带岩石海岸的捕食率，并对随后的群落动态产生影响。
