North Temperate Lakes LTER: Pelagic Macroinvertebrate Summary 1983 - current

This is a summary of dataset knb.lter.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 collected after dark 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-m diameter, 1-mm mesh net. On Trout Lake four additional sites are sampled, where depths are approximately at 10 m, 15 m, 20 m, and 25 m, with three tows taken at each site. Samples are preserved, and later counted in their entirety for Chaoborus spp., Leptodora kindtii, Mysis relicta, and Bythotrephes longimanus. Sampling Frequency: annually. Number of sites: 7本数据集为knb.lter.ntl.13的概要说明。其衍生数据包含各捕获物种的数量均值与标准差，以及基于面积基准和体积基准的个体密度均值与标准差。研究团队使用直径1 m、网目尺寸1 mm的拖网，在特劳特湖（Trout Lake）区域内7个主要湖泊的最深处开展夜间垂直拖网采样，每个湖泊布设5次拖网；7个主要湖泊分别为阿勒夸什湖（Allequash）、大麝香湖（Big Muskellunge）、水晶湖（Crystal）、闪光湖（Sparkling）、特劳特湖（Trout Lake），以及泥炭湖27-02[水晶泥炭湖（Crystal Bog）]和12-15[特劳特泥炭湖（Trout Bog）]。此外，在特劳特湖额外设置4个采样点位，水深分别约为10 m、15 m、20 m与25 m，每个点位开展3次拖网采样。所有样本经固定保存后，对幽蚊属（Chaoborus spp.）、透明薄皮溞（Leptodora kindtii）、孟氏糠虾（Mysis relicta）以及长镖水蚤（Bythotrephes longimanus）进行全量计数。本数据集采样频率为每年1次，基础采样点位数量为7个。