Crassula aquatica (NT)

Observations of Crassula aquatica 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. Crassula aquatica has been placed to the Red List category of Near Threatened (NT) 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: 0 = no observations 1 = present before year 1995 or in 1995 2 = present after year 1995 3 = present before and after year 1995为编制波罗的海海洋环境保护委员会（HELCOM）濒危物种红色名录，研究人员于波罗的海海域收集了水生景天（Crassula aquatica）的观测记录。 2013年发布的《波罗的海濒危物种红色名录》由HELCOM制定，是首个覆盖波罗的海所有海洋哺乳动物、鱼类、鸟类、大型水生植物（aquatic plants）以及底栖无脊椎动物的波罗的海物种濒危程度评估体系，其评估标准遵循国际自然保护联盟（IUCN）红色名录准则。 本次红色名录评估共涉及近2800个物种，其中约1750个物种依据IUCN红色名录准则完成了评估。 水生景天（Crassula aquatica）被列入近危（Near Threatened，NT）物种红色名录等级。 可供下载的数据集包含波罗的海海域空间网格数据。该物种的分布信息可在对应名称列中查询，其编码规则如下： 0 代表无观测记录；1 代表1995年及之前存在观测记录；2 代表1995年之后存在观测记录；3 代表1995年前后均存在观测记录。