North Temperate Lakes LTER: Benthic Macroinvertebrates 1981 - current (Reformatted to a Darwin Core Archive)

This data package is formatted as a Darwin Core Archive (DwC-A, event core). For more information on Darwin Core see https://www.tdwg.org/standards/dwc/. This Level 2 data package was derived from the Level 1 data package found here: https://pasta.lternet.edu/package/metadata/eml/edi/290/2, which was derived from the Level 0 data package found here: https://pasta.lternet.edu/package/metadata/eml/knb-lter-ntl/11/35. The abstract below was extracted from the Level 0 data package and is included for context: Macroinvertebrates are collected from selected shoreline and deep water locations in the seven primary lakes (Allequash, Big Muskellunge, Crystal, Sparkling, and Trout lakes, and unnamed lakes 27-02 [Crystal Bog], and 12-15 [Trout Bog]) in the Trout Lake area using modified Hester-Dendy samplers. Samplers are placed at fyke net and gill net locations in August and retrieved 3-4 weeks later. Macroinvertebrates are preserved in ethanol. This dataset contains counts of various groups of macroinvertebrates identified from specific samples. The majority of the identifications are at the genus level. The data table "Benthic Macroinvertebrate Codes" identifies the taxonomic group represented by each group code. Taxonomic references: Ecology and Classification of North American Freshwater Invertebrates, Edited by James H Thorp and Alan P Covich, Academic Press, Inc, 1991; Aquatic Insects of Wisconsin, William L Hilsenhoff, Natural History Museums Council, University of Wisconsin-Madison (1995). Sampling Frequency: annually Number of sites: 7本数据包采用达尔文核心归档（Darwin Core Archive, DwC-A）事件核心格式。如需了解达尔文核心（Darwin Core）标准的更多详情，请访问：https://www.tdwg.org/standards/dwc/。本二级数据包源自此处发布的一级数据包：https://pasta.lternet.edu/package/metadata/eml/edi/290/2，而该一级数据包又源自下述零级数据包：https://pasta.lternet.edu/package/metadata/eml/knb-lter-ntl/11/35。 以下摘要提取自该零级数据包，用于提供研究背景：研究团队在特劳特湖（Trout Lake）区域的7个核心湖泊——阿勒夸什湖（Allequash）、大北美狗鱼湖（Big Muskellunge）、水晶湖（Crystal）、斯帕克林湖（Sparkling）、特劳特湖（Trout），以及编号为27-02的无名湖〔水晶沼湖（Crystal Bog）〕和编号为12-15的无名湖〔特劳特沼湖（Trout Bog）〕——的选定岸线与深水采样点位，采用改良型赫斯特-登迪采样器（modified Hester-Dendy sampler）采集大型底栖无脊椎动物（macroinvertebrates）。采样器于8月部署在渔笼（fyke net）与刺网（gill net）布设点位，3至4周后完成回收。采集得到的大型底栖无脊椎动物样品以乙醇进行固定保存。 本数据集包含从各专属采样样品中鉴定得到的多类大型底栖无脊椎动物的计数数据，绝大多数鉴定工作精准到属级分类单元。名为“底栖大型无脊椎动物编码表”（Benthic Macroinvertebrate Codes）的数据表明确了每一组编码所对应的分类类群。 分类学参考资料如下：《北美淡水无脊椎动物生态学与分类》（Ecology and Classification of North American Freshwater Invertebrates），James H Thorp与Alan P Covich主编，学术出版社（Academic Press, Inc），1991年；《威斯康星州水生昆虫》（Aquatic Insects of Wisconsin），William L Hilsenhoff著，威斯康星大学麦迪逊分校自然历史博物馆理事会（Natural History Museums Council, University of Wisconsin-Madison），1995年。 采样频率：每年1次 采样点位总数：7个