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首页> 外文期刊>Limnologica >Response of gastropod grazers to food conditions, current velocity, and substratum roughness
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Response of gastropod grazers to food conditions, current velocity, and substratum roughness

机译：腹足类动物放牧者对食物条件，当前速度和基质粗糙度的响应

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摘要

Freshwater snails are widely distributed in running water systems. Most of them are feeding on biofilms attached to substrata. We used gastropods with different morphology and potentially different traits to analyse the effect of water currents and substratum roughness on the interactions between grazers and biofilms. The gastropods were exposed to naturally grown biofilms from the River Rhine that differed in age and in their artificial substratum roughness (mimicked by abrasive paper). The experiments were conducted in endless channels with paddle wheels where the current velocity could be set steplessly. The freshwater pulmonates Ancylus fluviatilis and Physella acuta as well as the freshwater prosobranchs Bithynia tentaculata and Potamopyrgus antipodarum were used as model organisms in this investigation. The time the snails remained on the test area related to the substratum roughness, and current velocity was used to compare the performance of the four snail species on different aged biofilms. In one experiment, the locomotive activity of snails was traced.
机译：淡水蜗牛广泛分布在自来水系统中。他们中的大多数以附着在基质上的生物膜为食。我们使用了具有不同形态和潜在不同性状的腹足动物来分析水流和底层粗糙度对放牧者与生物膜之间相互作用的影响。腹足动物暴露于莱茵河自然生长的生物膜，这些生物膜的年龄和人工基质粗糙度（用砂纸模仿）不同。实验是在带桨轮的无尽通道中进行的，在此处可以无级设置当前速度。在本研究中，使用了淡水肺藻Ancylus fluviatilis和Physella acuta以及淡水前支鱼Bithynia tentaculata和Potamopyrgus antipodarum作为模型生物。蜗牛停留在与基底粗糙度相关的测试区域上的时间，并使用电流速度比较这四种蜗牛在不同老化生物膜上的性能。在一个实验中，追踪了蜗牛的机车活动。

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