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首页> 外文期刊>Proceedings of the Royal Society. Biological sciences >Impacts of ocean acidification on sea urchin growth across the juvenile to mature adult life-stage transition is mitigated by warming
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Impacts of ocean acidification on sea urchin growth across the juvenile to mature adult life-stage transition is mitigated by warming

机译：通过变暖减轻了海胆对海胆生长的影响，通过变暖减轻了成熟成年生命阶段转换

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摘要

Understanding how growth trajectories of calcifying invertebrates are affected by changing climate requires acclimation experiments that follow development across life-history transitions. In a long-term acclimation study, the effects of increased acidification and temperature on survival and growth of the tropical sea urchin Tripneustes gratilla from the early juvenile (5 mm test diameter-TD) through the developmental transition to the mature adult (60 mm TD) were investigated. Juveniles were reared in a combination of three temperature and three pH/pCO(2) treatments, including treatments commensurate with global change projections. Elevated temperature and pCO(2)/pH both affected growth, but there was no interaction between these factors. The urchins grew more slowly at pH 7.6, but not at pH 7.8. Slow growth may be influenced by the inability to compensate coelomic fluid acid-base balance at pH 7.6. Growth was faster at +3 and +6 degrees C compared to that in ambient temperature. Acidification and warming had strong and interactive effects on reproductive potential. Warming increased the gonad index, but acidification decreased it. At pH 7.6 there were virtually no gonads in any urchins regardless of temperature. The T. gratilla were larger at maturity under combined near-future warming and acidification scenarios (+3 degrees C/pH 7.8). Although the juveniles grew and survived in near-future warming and acidification conditions, chronic exposure to these stressors from an early stage altered allocation to somatic and gonad growth. In the absence of phenotypic adjustment, the interactive effects of warming and acidification on the benthic life phases of sea urchins may compromise reproductive fitness and population maintenance as global climatic change unfolds.
机译：了解钙化无脊椎动物的生长轨迹如何受到不断变化的气候需要适应实验的适应实验，这些实验遵循终身历史过渡的发展。在长期的适应性研究中，酸化和温度提高对热带海胆的生存和生长的影响，通过发育过渡到成熟成人的早期幼年（5 mm试验直径-TD）的热带海胆（5 mm试验直径-TD）（60 mm Td ）被调查了。幼羽以三个温度和三个pH / PCO（2）个处理的组合饲养，包括与全球变化预测相称的治疗方法。升高的温度和PCO（2）/ pH都会影响生长，但这些因素之间没有相互作用。核苷酸在pH 7.6时慢慢增长，但不是在pH 7.8时。缓慢的生长可能受到无法补偿pH7.6的细胞液酸碱平衡的影响。与环境温度相比，+ 3和+ 6摄氏度的增长更快。酸化和变暖对生殖潜力具有很强的互动影响。加热增加了Gonad指数，但酸化降低了它。在pH7.6，无论温度如何，任何血管内几乎没有Gonads。在近期未来的近期变暖和酸化方案中，T.Gratilla在成熟度下较大（+ 3℃/ pH 7.8）。虽然少年在接近未来的变暖和酸化条件下幸存下来，但从早期阶段改变分配给躯体和性能的慢性暴露于这些压力源。在没有表型调整的情况下，随着全球气候变化展开，海胆的底栖寿命阶段对终生寿命的互动和酸化的互动效应可能会损害生殖健康和人口维护。

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