Lake snow removal experiment zooplankton community data, under ice, 2019-2021

Although it is a historically understudied season, winter is now recognized as a time of biological activity and relevant to the annual cycle of north-temperate lakes. Emerging research points to a future of reduced ice cover duration and changing snow conditions that will impact aquatic ecosystems. The aim of the study was to explore how altered snow and ice conditions, and subsequent changes to under-ice light environment, might impact ecosystem dynamics in a north, temperate bog lake in northern Wisconsin, USA. This dataset resulted from a snow removal experiment that spanned the periods of ice cover on South Sparkling Bog during the winters of 2019, 2020, and 2021. During the winters 2020 and 2021, snow was removed from the surface of South Sparkling Bog using an ARGO ATV with a snow plow attached. The 2019 season served as a reference year, and snow was not removed from the lake. This dataset represents under ice zooplankton community samples (integrated tows at depths of 7 m) and some shoulder-season (open water) zooplankton community samples. Zooplankton samples were preserved in 90% ethanol and later processed to determine taxonomic classification at the species-level, density (individuals / L), and average length (mm).

尽管冬季长期以来在相关研究中未得到足够关注，但如今学界已确认其为生物活动活跃时段，且与北温带湖泊的年度生命周期紧密相关。新兴研究表明，未来冰盖覆盖时长将缩短、积雪状况亦将发生改变，这将对水生生态系统产生影响。本研究旨在探究积雪与冰况的改变，以及由此引发的冰下光照环境变化，会如何影响美国威斯康星州北部一处北温带沼泽湖的生态系统动态。本数据集源自一项积雪移除实验，实验覆盖了2019、2020及2021年冬季南光沼泽（South Sparkling Bog）的冰盖期。2020与2021年冬季，研究团队使用搭载除雪犁的ARGO全地形车（ATV）清除了南光沼泽的湖面积雪。2019年冬季作为对照年份，未对该湖开展积雪移除作业。本数据集包含冰下浮游动物群落样本（7米深度的整合拖网样品）以及部分过渡季（开放水体期）的浮游动物群落样本。浮游动物样本经90%乙醇固定保存，后续通过实验分析确定其物种水平的分类学归属、密度（单位：个/升）及平均体长（单位：毫米）。