Drought-Escape Behaviors Of Aquatic Insects May Be Adaptations To Highly Variable Flow Regimes Characteristic Of Desert Rivers

Drought-Escape Behaviors Of Aquatic Insects May Be Adaptations To Highly Variable Flow Regimes Characteristic Of Desert Rivers
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水生昆虫的逃旱行为可能是对沙漠河流多变水流特征的适应

DOI：
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发表时间：
2008
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影响因子：
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通讯作者：
Laura E. McMullen
Laura E. McMullen
中科院分区：
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文献类型：
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作者：
D. Lytle;J. Olden;Laura E. McMullen

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摘要我们记录了两种沙漠水生昆虫如何利用正流变来躲避沙漠河流中的干旱。在亚利桑那州的圣玛丽亚河、拉巴斯和莫哈哈县，我们观察到大约3600只长趾水甲成虫Postelichus IMMSI(鞘翅目：鳞甲科)在上游爬行，同时伴随着上游地表水的后退。同时，我们还观察到北方灰沙龙幼虫在上游高密度(690尾/m2)的洞穴和游动。这两个分类群都以足够的速度移动，在被干旱覆盖之前到达了河流的常年河段。
Abstract We document how two species of desert aquatic insects use positive rheotaxis to escape drought in desert rivers. We observed ca. 3,600 adults of the long-toed water beetle Postelichus immsi (Coleoptera: Dryopidae) crawling upstream concurrent with upstream recession of surface water in the Santa Maria River, La Paz and Mohave counties, Arizona. At the same time, we observed larvae of the gray sanddragon Progomphus borealis (Odonata: Gomphidae) burrowing and swimming upstream in large densities (690 larvae/m2). Both taxa moved with sufficient speed to arrive at perennial reaches of the river before being overtaken by drought.