Elevated pCO2 does not impair performance in autotomised individuals of the intertidal predatory starfish Asterias rubens (Linnaeus, 1758).

Elevated pCO2 does not impair performance in autotomised individuals of the intertidal predatory starfish Asterias rubens (Linnaeus, 1758).
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pCO2 升高不会损害潮间带掠食性海星 Asterias rubens 的自体解剖个体的性能(Linnaeus,1758)。

DOI:
10.1016/j.marenvres.2019.104841
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发表时间:
2020
影响因子:
3.3
通讯作者:
McCarthy ID
McCarthy ID
中科院分区:
环境科学与生态学2区
文献类型:
--
作者:
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与其他棘皮动物相比,海星对海洋酸化的影响的研究仍然较少。这项研究考察了二氧化碳浓度升高和手臂再生对潮间带掠食性海星(hasterias rubens)性能的综合影响,因为这两种影响都是有代价的。使用双向因子实验(~400 μatm vs ~1000 μatm;自动化个体vs非自动化个体)来检查完整和再生手臂的生长速度、脂质含量(幽门caeca和性腺)和钙含量(体壁),以及随后对手臂再生速度、恢复时间(行为)和120天死亡率的影响。自动化个体往往表现出较低(不显著)的生存和成长。升高的二氧化碳浓度对死亡率、体生长、手臂再生、翻正时间和手臂钙含量没有影响。无论自动化程度如何,由于pco2升高,幽门caeca的脂质含量较高,而性腺的脂质含量则不高。研究结果表明,成年人。尽管还需要进行更长期的实验,因为结果表明长期暴露于升高的pco2可能会损害存活、生长和钙化,但在120天内,rubbens仍不受pco2升高和/或手臂自切的影响。
The impacts of ocean acidification remain less well-studied in starfish compared to other echinoderm groups. This study examined the combined effects of elevatedpCO2and arm regeneration on the performance of the intertidal predatory starfishAsterias rubens, as both are predicted to come at a cost to the individual. A two-way factorial experiment (~400 μatm vs ~1000 μatm; autotomised vs non-automised individuals) was used to examine growth rates, lipid content (pyloric caeca and gonads), and calcium content (body wall) in both intact and regenerating arms, as well as subsequent effects on rate of arm regeneration, righting time (behaviour) and mortality over 120 days. Autotomised individuals tended to show lower (not significant), survival and growth. ElevatedpCO2had no effect on mortality, body growth, arm regeneration, righting time or arm calcium content. Lipid content was higher in the pyloric caeca, but not in the gonads, in response to elevatedpCO2irrespective of autotomisation. The results of the study suggest that adultA. rubensremain unaffected by increasedpCO2and/or arm autotomy for 120 days, although longer term experiments are necessary as the results indicated that survival, growth and calcification may be impaired with longer-term exposure to elevatedpCO2.
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