Morphological traits and vertical distribution of hyporheic chironomid larvae in Atlantic Forest streams

Pub Date : 2019-07-03 DOI:10.1080/03946975.2019.1639034

R. Mugnai, A. Serpa-Filho, J. Nessimian, A. Kury, S. V. Milesi

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引用次数: 4

Abstract

Hyporheic zone is an active ecotone constituted by the interstitial spaces between the particles of the riverbed. The use of morphological traits can be useful to detect organisms distribution patterns in these areas. Information concerning hyporheic communities are scarce as well on chironomid vertical distribution. Fauna samples from the hyporheic zone were collected at three depths and in four microhabitats. Eighteen genera were recorded and 13 morphological traits were identified. The results indicate that the distribution patterns of hyporheic chironomid taxa vary according to depth and microhabitat. Spatial preferences for riffles habitats are evident, and the vertical distribution is correlated with morphological traits like body size, pseudopods and mentum. Faunal abundance and richness decreased with depth and the vertical distribution influenced the chironomid morphological traits. We conclude that the use of morphological trait can introduce new useful information about the distribution of hyporheic fauna. http://zoobank.org/urn:lsid:zoobank.org:pub:E1DDF958-AA8C-40FD-A0D5-F281AA4AEA04

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大西洋森林溪流中低风性摇蚊幼虫的形态特征及垂直分布

下潜带是由河床颗粒间的间隙构成的活动过渡带。利用形态特征可以有效地检测这些地区的生物分布模式。关于拟隐群落的垂直分布资料也很少。在三个深度和四个微生境中采集了潜流带的动物群样本。记录了18个属，鉴定了13个形态特征。结果表明，潜潜摇尾鱼类群的分布格局因深度和微生境的不同而不同。其空间分布与体型、拟足、动量等形态特征相关。动物丰度和丰富度随深度的增加而降低，垂直分布影响摇尾鱼的形态特征。我们认为，利用形态特征可以提供关于潜潜区系分布的新的有用信息。http://zoobank.org/urn:lsid:zoobank.org:pub:E1DDF958-AA8C-40FD-A0D5-F281AA4AEA04

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