Karabanov Dmitry P, Bekker Eugeniya I, Shiel Russell J, Kotov Alexey A
A. N. Severtsov Institute of Ecology and Evolution, Leninsky Prospect 33, Moscow 119071, Russia Papanin Institute of the Biology of Inland Waters, Russian Academy of Sciences, Borok 152742, Yaroslavl Area, Russia.
Zootaxa. 2018 Mar 27;4402(1):136-148. doi: 10.11646/zootaxa.4402.1.6.
We found a Holarctic microcrustacean Daphnia galeata Sars, 1863 (Cladocera: Daphniidae) in the Lower Lakes of South Australia. This taxon was never detected in continental Australia before. Its identity was confirmed by the sequences of mitochondrial COI, 12S and 16S and nuclear 18S and 28S genes. A maximum likelihood tree from a dataset from combining 12S + 16S mitochondrial sequence and a split network of the COI haplotypes are provided, but resolution of both genes is not sufficient to reveal the exact region of the Holarctic from where D. galeata was introduced to Australia; the vector of its invasion also is unknown. We hypothesize that appearance of D. galeata in the Lower Lakes of the Murray River is related to a recent anthropogenic eutrophication of water bodies in this region, keeping in mind that examples of successful invasion of some European lakes by D. galeata after their eutrophication are well-known. We also hypothesize that establishment of this non-indigenous taxon populations in Australia might have a strong negative impact on native lake biota.
我们在南澳大利亚的低地湖泊中发现了一种全北区的微型甲壳动物——1863年命名的盔形溞（枝角目：溞科）。此前在澳大利亚大陆从未检测到过这个分类单元。通过线粒体细胞色素氧化酶亚基I（COI）、12S和16S以及核18S和28S基因序列确认了它的身份。本文提供了一个结合12S + 16S线粒体序列数据集构建的最大似然树以及COI单倍型的分裂网络，但这两个基因的分辨率都不足以揭示盔形溞被引入澳大利亚的确切全北区来源地；其入侵途径也未知。我们推测盔形溞在墨累河低地湖泊中的出现与该地区近期水体的人为富营养化有关，同时要注意到一些欧洲湖泊在富营养化后被盔形溞成功入侵的例子是广为人知的。我们还推测这种非本土分类单元在澳大利亚的种群建立可能会对当地湖泊生物群产生强烈的负面影响。
