Gammarellus angulosus (DD)

Observations of Gammarellus angulosus were collected from the Baltic Sea area for HELCOM Red List species list. The HELCOM Red List of Baltic Sea species in danger of becoming extinct (2013) is the first threat assessment for Baltic Sea species that covers all marine mammals, fish, birds, macrophytes (aquatic plants), and benthic invertebrates, and follows the Red List criteria of the International Union for Conservation of Nature (IUCN). Almost 2800 species were considered in the Red List assessment and about 1750 were evaluated according to the IUCN Red List criteria. Gammarellus angulosus has been placed to the Red List category of Data Deficient (DD) species. Dataset for download contains spatial grid of the Baltic Sea. Distribution of the species can be found in corresponding name column. Values are coded: 1 - Present before year 2000 or in 2000, 2 - Present after year 2000, 3 - Present both before and after year 2000.为协助编制赫尔辛基委员会（HELCOM）濒危物种红色名录，研究人员从波罗的海海域收集了宽角钩虾（Gammarellus angulosus）的观测记录。 《赫尔辛基委员会2013年波罗的海濒危物种红色名录》是首份覆盖波罗的海全门类物种的濒危风险评估报告，涵盖所有海洋哺乳动物、鱼类、鸟类、大型水生植物（macrophytes）以及底栖无脊椎动物，评估流程严格遵循国际自然保护联盟（International Union for Conservation of Nature, IUCN）的红色名录等级标准。 本次红色名录评估共纳入近2800个物种，其中约1750个物种依据国际自然保护联盟红色名录标准完成了正式等级评定。 宽角钩虾（Gammarellus angulosus）被归类为数据缺乏（Data Deficient, DD）物种。 可供下载的数据集包含波罗的海空间网格数据，该物种的分布信息可在对应名称列中查询，编码规则如下： 1 — 2000年及之前存在观测记录； 2 — 2000年之后存在观测记录； 3 — 2000年前后均存在观测记录。