Forgotten for decades: Lake Lanao and the genetic assessment of its mollusc diversity
Forgotten for decades: Lake Lanao and the genetic assessment of its mollusc diversity
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被遗忘数十年：拉瑙湖及其软体动物多样性的遗传评估
DOI：
10.1007/s10750-018-3666-0
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发表时间：
2019
期刊：
影响因子：
2.6
通讯作者：
Clewing
中科院分区：
文献类型：
--
作者：
Stelbrink;von Rintelen;Albrecht;Clewing
棉兰老岛上的拉瑙湖是菲律宾最大的淡水湖，可能是东南亚少数几个古老的湖泊之一。这个湖的动物群以其特有的鲤科鱼类而闻名，由于各种人为活动，鲤科鱼类几乎灭绝。相比之下，人们对拉瑙湖的无脊椎动物群及其在东南亚相关分类群中的位置知之甚少。我们将重点研究淡水软体动物的多样性，特别是形态多样化的胎生腹足动物，并首次对这一群体进行遗传学研究，以检验所观察到的形态变异是否也反映在相应的遗传变异上。线粒体序列数据表明，这些胎生动物形成了一个单系群，包括形态不同和部分遗传不同的物种（形态）。鲤科鱼类和生腹足类的高度多样性，以及棉兰老岛的地质和构造演化表明，拉瑙湖可能起源于10万多年前，因此确实是一个古老的湖泊。然而，其动物群受到外来物种的持续威胁，迫切需要制定和实施可持续的保护策略。
Lake Lanao on Mindanao island is the largest freshwater lake in the Philippines and may represent one of the few ancient lakes in Southeast Asia. This lake’s fauna is best known for its endemic cyprinid fishes that have been nearly driven to extinction through various anthropogenic actions. In contrast, only little is known about Lake Lanao’s invertebrate fauna and its placement within related Southeast Asian taxa. We here focus on the diversity in freshwater molluscs, particularly the morphologically diverse viviparid gastropods, and provide first genetic insights into this group in order to test whether the morphological variability observed is also reflected by corresponding genetic variation. Mitochondrial sequence data indicate that these viviparids form a monophyletic group comprising morphologically distinct and partly genetically different (morpho)species. Both the high diversity found in cyprinid fishes and viviparid gastropods together with the geological and tectonic evolution of Mindanao suggest that Lake Lanao may have originated more than 100,000 years ago and is thus indeed an ancient lake. However, its fauna is under continuous threat not least from the introduction of non-native species, and the development and implementation of sustainable conservation strategies is direly needed.
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