Daphnia diversity on the Tibetan Plateau measured by DNA taxonomy

文献类型： 外文期刊

第一作者： Xu, Lei

作者： Xu, Lei;Xu, Lei;Lin, Qiuqi;Xu, Shaolin;Gu, Yangliang;Dumont, Henri J.;Han, Bo-Ping;Hou, Juzhi;Liu, Yongqin;Xu, Lei;Xu, Lei

作者机构：

关键词： COI; Daphnia; DNA taxonomy; Tibetan Plateau

期刊名称：ECOLOGY AND EVOLUTION （ 影响因子：2.912； 五年影响因子：3.271 ）

ISSN： 2045-7758

年卷期： 2018 年 8 卷 10 期

页码：

收录情况： SCI

摘要： Daphnia on the Tibetan Plateau has been little studied, and information on species diversity and biogeography is lacking. Here, we conducted a 4-year survey using the barcoding fragment of the mitochondrial COI gene to determine the distribution and diversity of Daphnia species found across the Plateau. Our results show that species richness is higher than previously thought, with total described and provisional species number doubling from 5 to 10. Six of the taxonomic units recovered by DNA taxonomy agreed well with morphology, but DNA barcoding distinguished three clades each for the D.longispina (D.galeata, D.dentifera, and D.longispina) and D.pulex (D.pulex, D. cf. tenebrosa, and D.pulicaria) complexes. The sequence divergence between congeneric species varied within a large range, from 9.25% to 30.71%. The endemic D.tibetana was the most common and widespread species, occurring in 12 hyposaline to mesosaline lakes. The lineage of D.longispina is the first confirmed occurrence in west Tibet.

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