Outer organic layer and internal repair mechanism protects pteropod Limacina helicina from ocean acidification
Outer organic layer and internal repair mechanism protects pteropod Limacina helicina from ocean acidification
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DOI：
10.1016/j.dsr2.2015.12.005
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发表时间：
2016-05-01
影响因子：
3
通讯作者：
Tynan, Eithne
中科院分区：
文献类型：
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作者：
Peck, Victoria L.;Tarling, Geraint A.;Tynan, Eithne
2012年6月在格陵兰海收集到的极地翼足类动物Limacina helicina的伤痕累累的外壳揭示了其早期生命阶段的伤害史，很可能是捕食失败。在亚北极和更远的地方发现的标本中，通常可以观察到壳断裂和随后重新生长的证据。然而，在格陵兰冰架上的一个地点，已经受到机械损伤的贝壳也被发现有相当大的溶解。很明显，外壳的溶解是局部的，在动物生命的早期阶段，覆盖外壳的有机膜被破坏了。在骨膜保持完整的地方，外壳看起来是原始的，没有溶解的迹象。标本在收集后似乎是原始的，孵育四天。在收集过程中受到膜周损伤的贝壳疤痕，只有在文石和ω (Ar)不饱和的水中孵育的标本中才会变得明显。
Scarred shells of polar pteropod Limacina helicina collected from the Greenland Sea in June 2012 reveal a history of damage, most likely failed predation, in earlier life stages. Evidence of shell fracture and subsequent re-growth is commonly observed in specimens recovered from the sub-Arctic and further afield. However, at one site within sea-ice on the Greenland shelf, shells that had been subject to mechanical damage were also found to exhibit considerable dissolution. It was evident that shell dissolution was localised to areas where the organic, periostracal sheet that covers the outer shell had been damaged at some earlier stage during the animal's life. Where the periostracum remained intact, the shell appeared pristine with no sign of dissolution. Specimens which appeared to be pristine following collection were incubated for four days. Scarring of shells that received periostracal damage during collection only became evident in specimens that were incubated in waters undersaturated with respect to aragonite, Omega(Ar)