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首页> 外文期刊>Environmental toxicology and chemistry >Understanding the Captivity Effect on Invertebrate Communities Transplanted into an Experimental Stream Laboratory
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Understanding the Captivity Effect on Invertebrate Communities Transplanted into an Experimental Stream Laboratory

机译：了解圈养对无脊椎动物社区移植到实验溪流实验室的影响

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Little is known about how design and testing methodologies affect the macroinvertebrate communities that are held captive in mesocosms. To address this knowledge gap, we conducted a 32-d test to determine how seeded invertebrate communities changed once removed from the natural stream and introduced to the laboratory. We evaluated larvae survival and adult emergence in controls from 4 subsequent studies, as well as corresponding within-river community changes. The experimental streams maintained about 80% of the invertebrates that originally colonized the introduced substrates. Many macroinvertebrate populations experienced changes in numbers through time, suggesting that these taxa are unlikely to maintain static populations throughout studies. For example, some taxa (Tanytarsini, Simuliidae, Cinygmula sp.) increased in number, grew (Simuliidae), and possibly recruited new individuals (Baetidae) as larvae, while several also completed other life history events (pupation and emergence) during the 30- to 32-d studies. Midges and mayflies dominated emergence, further supporting the idea that conditions are conducive for many taxa to complete their life cycles while held captive in the experimental streams. However, plecopterans were sensitive to temperature changes 2 degrees C between river and laboratory. Thus, this experimental stream testing approach can support diverse larval macroinvertebrate communities for durations consistent with some chronic criterion development and life cycle assessments (i.e., 30d). The changes in communities held captive in the experimental streams were mostly consistent with the parallel changes observed from in situ river samples, indicating that mesocosm results are reasonably representative of real river insect communities. Environ Toxicol Chem 2018;37:2820-2834. Published 2018 Wiley Periodicals Inc. on behalf of SETAC. This article is a US government work and, as such, is in the public domain in the United States of America.
机译：对于设计和测试方法学如何影响圈养在中观世界中的大型无脊椎动物群落，人们知之甚少。为了解决这一知识鸿沟，我们进行了32天测试，以确定从自然流中移出并引入实验室的无脊椎动物种子群落的变化。我们评估了4项后续研究的对照组中幼虫的存活率和成年出现率，以及相应的河内群落变化。实验流保持了最初定居在引入的底物上的无脊椎动物的约80％。许多大型无脊椎动物种群的数量会随着时间而变化，这表明这些类群在整个研究中不太可能保持静态种群。例如，一些分类单元（Tanytarsini，Simuliidae，Cinygmula sp。）数量增加，生长（Simuliidae），并可能招募了新的个体（Baetidae）作为幼虫，而另一些还完成了30年代的其他生活史事件（化脓和出苗） -进行32天研究。 ges类和may类动物占主导地位，进一步支持了这样的观点，即条件有利于许多分类单元完成其生命周期，同时又被实验流所束缚。但是，鳞翅类对河流和实验室之间的温度变化> 2°C敏感。因此，这种实验性水流测试方法可以在与某些慢性标准制定和生命周期评估（即30天）一致的持续时间内支持各种幼体大型无脊椎动物群落。实验溪流中被束缚的群落的变化与从原位河水样品中观察到的平行变化基本一致，这表明中观研究结果可以合理地代表真实的河流昆虫群落。 Environ Toxicol Chem 2018; 37：2820-2834。代表SETAC发布了2018年Wiley Periodicals Inc ..本文是美国政府的工作，因此，它属于美国的公共领域。

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