North Temperate Lakes LTER: Pelagic Macroinvertebrate Summary 1983 - current (Reformatted to the ecocomDP Design Pattern)

This data package is formatted as an ecocomDP (Ecological Community Data Pattern). For more information on ecocomDP see https://github.com/EDIorg/ecocomDP. This Level 1 data package was derived from the Level 0 data package found here: https://pasta.lternet.edu/package/metadata/eml/knb-lter-ntl/14/32. The abstract below was extracted from the Level 0 data package and is included for context: This is a summary of dataset NTL 13. Derived data include the mean and standard deviation of the number of each species captured as well as the mean and standard deviation of the density of individuals on both an areal and volumetric basis. Five vertical tows are done at the deepest point of each of the seven primary lakes in the Trout Lake area (Allequash, Big Muskellunge, Crystal, Sparkling, and Trout lakes and bog lakes 27-02 [Crystal Bog], and 12-15 [Trout Bog]) using a 1-mm mesh net with a 1-m wide mouth. On Trout Lake four additional sites are sampled, where depths are approximately at 10 m, 15 m, 20 m, and 25 m respectively, with three tows done at each site. Trout Lake was the only lake sampled in 2020. All samples are taken in darkness. Samples are preserved and counted, yielding numbers caught. These night tows target the large invertebrate planktivore component of the pelagic zooplankton community. Sampling Frequency: annually Number of sites: 11

本数据包采用ecocomDP（生态群落数据模式，Ecological Community Data Pattern）格式。有关ecocomDP的详细信息，请访问https://github.com/EDIorg/ecocomDP。本一级数据包源自如下链接所指向的零级数据包：https://pasta.lternet.edu/package/metadata/eml/knb-lter-ntl/14/32。以下摘要是从该零级数据包中提取的背景信息：本内容为数据集NTL 13的汇总结果。衍生数据涵盖各捕获物种的个体数量均值与标准差，以及基于面积和体积的种群密度均值与标准差。研究人员使用网口宽度1米、网孔孔径1毫米的采样网，在鳟湖（Trout Lake）区域的7个核心湖泊——即Allequash湖、Big Muskellunge湖、Crystal湖、Sparkling湖、Trout湖，以及沼泽湖27-02[克里斯特尔沼泽（Crystal Bog）]与12-15[鳟鱼沼泽（Trout Bog）]——的最深点位各开展5次垂直拖网采样。在Trout湖额外设置4个采样点，水深分别约为10米、15米、20米及25米，每个点位进行3次拖网采样。2020年仅对Trout湖实施了采样。所有采样均于夜间完成。样本经固定处理后进行计数，统计得到捕获个体数量。本次夜间拖网采样的目标对象为远洋浮游动物群落中的大型无脊椎浮游食生物类群。采样基本信息如下：采样频率为每年1次，总采样点位数量为11个。