Abstract Diel vertical migration (DVM) is common in aquatic organisms. The trade‐off between reduced predation risk in deeper, darker waters during the day and increased foraging opportunities closer to the surface at night is a leading hypothesis for DVM behaviour. Diel vertical migration behaviour has dominated research and assessment frameworks for Mysis, an omnivorous mid‐trophic level macroinvertebrate that exhibits strong DVM between benthic and pelagic habitats and plays key roles in many deep lake ecosystems. However, some historical literature and more recent evidence indicate that mysids also remain on the bottom at night, counter to expectations of DVM. We surveyed the freshwater Mysis literature using Web of Science (WoS; 1945–2019) to quantify the frequency of studies on demographics, diets, and feeding experiments that considered, assessed, or included Mysis that did not migrate vertically but remained in benthic habitats. We supplemented our WoS survey with literature searches for relevant papers published prior to 1945, journal articles and theses not listed in WoS, and additional references known to the authors but missing from WoS (e.g. only 47% of the papers used to evaluate in situ diets were identified by WoS). Results from the survey suggest that relatively little attention has been paid to the benthic components of Mysis ecology. Moreover, the literature suggests that reliance on Mysis sampling protocols using pelagic gear at night provides an incomplete picture of Mysis populations and their role in ecosystem structure and function. We summarise current knowledge of Mysis DVM and provide an expanded framework that more fully considers the role of benthic habitat. Acknowledging benthic habitat as an integral part of Mysis ecology will enable research to better understand the role of Mysis in food web processes.

中文翻译：

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底栖栖息地是淡水糠虾生态的一个组成部分


摘要 昼夜垂直迁移（DVM）在水生生物中很常见。 DVM 行为的主要假设是白天在更深、更暗的水域中减少捕食风险和增加夜间靠近水面的觅食机会之间的权衡。昼夜垂直迁移行为主导了糠虾的研究和评估框架，糠虾是一种杂食性中营养级大型无脊椎动物，在底栖和中上层生境之间表现出强烈的 DVM，并在许多深湖生态系统中发挥着关键作用。然而，一些历史文献和最近的证据表明，糠虾也会在夜间停留在海底，这与 DVM 的预期相反。我们使用 Web of Science（WoS；1945-2019）调查了淡水糠虾文献，以量化有关人口统计、饮食和喂养实验的研究频率，这些研究考虑、评估或包括不垂直迁移但仍留在底栖栖息地的糠虾。我们对 WoS 调查进行了文献检索，以补充 1945 年之前发表的相关论文、WoS 中未列出的期刊文章和论文，以及作者已知但 WoS 中缺失的其他参考文献（例如，只有 47% 的论文用于评估原位饮食）由 WoS 识别）。调查结果表明，糠虾生态的底栖成分受到的关注相对较少。此外，文献表明，依靠夜间使用中上层装备进行糠虾采样方案无法全面了解糠虾种群及其在生态系统结构和功能中的作用。我们总结了 Mysis DVM 的当前知识，并提供了一个扩展框架，更充分地考虑了底栖栖息地的作用。 承认底栖栖息地是糠虾生态学的一个组成部分将使研究能够更好地了解糠虾在食物网过程中的作用。