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首页> 外文期刊>Hydrobiologia >Evidence of niche conservatism and host fidelity in the polar shrimp Lebbeus kiae n. sp (Decapoda: Caridea: Thoridae) from the Ross Sea, Antarctica
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Evidence of niche conservatism and host fidelity in the polar shrimp Lebbeus kiae n. sp (Decapoda: Caridea: Thoridae) from the Ross Sea, Antarctica

机译：极地虾Lebbeus kiae n。生态位保守性和寄主保真度的证据。 sp（Decapoda：Caridea：Thoridae）来自南极洲罗斯海

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摘要

We report a remarkable case of 'bipolarism', where two different polar species, namely Lebbeus polaris in the northern hemisphere and Lebbeus kiae n. sp., here described from the Southern Ocean, have been found to share similar ecologies. Despite the great geographical distance between the two species, both show high host fidelity in associations with two congeneric sea anemones: Bolocera tuediae and Bolocera kerguelensis, respectively. A close molecular phylogenetic relationship between the two Lebbeus species is indicated by COI data, which clearly show them as sister clades with respect to other congeners as well as a plurality of other Antarctic species. This is the first reported case of a defensive association in the Southern Ocean involving shrimps and sea anemones. The distribution of the new species, limited to seamount systems off the Ross Sea, may be the result of a specific colonisation/speciation event in the past, although more molecular data are needed to unravel the phylogenetic relationships within the genus Lebbeus. Despite this uncertainty, the persistence of ecological traits, i.e., the defensive association with sea anemones, indicates the presence of niche conservatism in this clade of shrimps.
机译：我们报告了“双极主义”的一个非凡案例，其中有两个不同的极性物种，即北半球的北极熊和北极熊。在南大洋地区，这里描述的海豚藻（S.sp.）具有相似的生态。尽管两个物种之间的地理距离很大，但它们都与两个同类海葵（分别为Bolocera tuediae和Bolocera kerguelensis）相关联显示出较高的寄主保真度。 COI数据表明了两种Lebbeus物种之间的紧密的分子系统发育关系，这些数据清楚地表明它们是与其他同类动物以及许多其他南极物种相对的姐妹进化枝。这是在南大洋首次发生的涉及虾和海葵的防御性协会案例。新物种的分布仅限于罗斯海以外的海山系统，可能是过去特定殖民化/物种形成事件的结果，尽管需要更多的分子数据来揭示列比氏菌属内的系统发育关系。尽管存在这种不确定性，但生态特征的持续存在，即与海葵的防御性联系，表明在这对虾中存在利基保守性。

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