Underestimated species diversity and hidden habitat preference in Moina (Crustacea, Cladocera) revealed by integrative taxonomy
Underestimated species diversity and hidden habitat preference in Moina (Crustacea, Cladocera) revealed by integrative taxonomy
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DOI：
10.1007/s10750-019-04147-3
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发表时间：
2020-02-01
期刊：
影响因子：
2.6
通讯作者：
Usio，Nisikawa
中科院分区：
文献类型：
--
作者：
Makino，Wataru;Machida，Ryuji J.;Usio，Nisikawa
在日本，农场池塘全年蓄水，而稻田被持续淹没不超过2个月，通常是从春天到初夏。虽然人工水体中的浮游动物区系预计会因淹没期的不同而有所不同，但这种关系在很大程度上缺乏科学证实。由于其普遍存在，枝角类Moinais一个合适的目标，研究栖息地相关的差异，在南极动物群，但其分类仍然没有解决，使形态鉴定可能不确定。因此，我们应用综合分类学与形态学和遗传学的评估，可靠的物种界定Moinasamples主要收集在日本（与较小的收集来自台湾）。这种方法增加了alpha多样性ofMoinaspecies在日本从3（在以前的研究）到7。它还揭示了不同的栖息地偏好-Moinaspecies，较小的物种主要分布在农场池塘（其次是天然湖泊），较大的物种主要分布在稻田。我们认为，物候匹配/不匹配的稻田淹没期是一个主要因素，这种强烈的空间物种周转的趋势，不同程度的鱼类捕食压力的栖息地类型之间的另一个因素。
In Japan, farm ponds retain water throughout the year while rice fields are continuously inundated for no more than 2 months, usually from spring to early summer. Although the zooplankton fauna in artificial water bodies would be expected to vary according to differences in inundation periods, scientific confirmation of this relation is largely lacking. Due to its ubiquity, the cladoceranMoinais a suitable target for studying habitat-related differences in the planktonic fauna, but its taxonomy remains unresolved, making morphological identifications potentially uncertain. We thus applied integrative taxonomy with both morphological and genetic evaluations for reliable species delimitation toMoinasamples collected primarily in Japan (with smaller collections from Taiwan). This approach increased the alpha diversity ofMoinaspecies in Japan from three (in previous studies) to seven. It also revealed different habitat preferences amongMoinaspecies, with the smaller species being distributed mostly in farm ponds (followed by natural lakes), and the larger species mostly in rice fields. We argue that the phenological match/mismatch with inundation period of rice fields was a major factor for this strong trend of spatial species turnover, with differing degrees of fish predation pressure among the habitat types being another factor.