AB.J3L7 (NT)

Summary Estimated observations of the biotope AB.J2K7 were collected from the Baltic Sea area by expert judgements for HELCOM Red List of biotopes, habitats and biotope complexes. Description Baltic aphotic sand dominated by striped venus (Chamelea gallina)The HELCOM Red List of Baltic Sea underwater biotopes, habitats and biotope complexes (2013) is an updated and improved version of the Red List assessment of marine and coastal biotopes and biotope complexes published in 1998. The classification of the report follows the proposed International Union for Conservation of Nature (IUCN) criteria and assessment principals but with some modifications for the Baltic Sea.Altogether, the HELCOM Underwater Biotope and habitat classification (HELCOM HUB) includes 209 biotopes of which 59 were red-listed. Many of the red-listed biotopes are located in deep areas of the Baltic Sea due to oxygen-free nature as well as in the southwestern Baltic Sea due to the salinity restricted distribution of species in certain biotope. The HELCOM assessment relies heavily on expert judgment and inference, and the questionnaire data represents the estimated presence-absence data not in-situ measured data. This must be taken in account when observing the map presentation. The biotopes are shown on the map using the EEA 100 km grid. This dataset displays estimated presence of AB.J2K7 according to HELCOM RED LIST assessment experts:The biotope is known to occur in the northern Kattegat in Swedish and Danish waters. The distribution map indicates the area in the 100 x 100 km grid where biotope is known to occur.(Data (expert judgements) collected in HELCOM RED LIST project, released in May 2013)摘要 针对生物群落AB.J2K7的估算观测数据，由赫尔辛基委员会（HELCOM）生物群落、生境及生物群落复合体红色名录项目的专家，在波罗的海海域通过专家研判方式采集获取。 数据集说明 以条纹维纳斯蛤（Chamelea gallina）为优势种的波罗的海无光砂质生境 《波罗的海水下生物群落、生境及生物群落复合体红色名录（2013）》是对1998年发布的海洋与海岸生物群落及生物群落复合体红色名录评估的更新完善版本。该报告的分类体系遵循国际自然保护联盟（International Union for Conservation of Nature, IUCN）提出的评估标准与原则，但针对波罗的海海域进行了部分适配调整。 赫尔辛基委员会水下生物群落与生境分类体系（HELCOM HUB）共计涵盖209种生物群落，其中59种被纳入红色名录。诸多红色名录收录的生物群落分布于波罗的海深水区（该区域存在无氧环境）以及波罗的海西南部海域（部分生物群落的物种分布受盐度限制）。赫尔辛基委员会的评估高度依赖专家研判与推论，问卷数据所呈现的为估算的物种存在-缺失数据，而非原位实测数据，在查看该数据集的地图展示时需注意这一点。 本数据集采用欧洲环境署（European Environment Agency, EEA）的100公里网格在地图上标注生物群落的分布。本数据集展示了依据赫尔辛基委员会红色名录评估专家估算得到的AB.J2K7生物群落的潜在分布：该生物群落已知分布于瑞典与丹麦海域的卡特加特海峡北部区域。该分布地图以100×100公里的网格标注了该生物群落的已知分布范围。 （数据由赫尔辛基委员会红色名录项目通过专家研判方式采集，于2013年5月发布）