Indicative distribution map for Ecosystem Functional Group MT2.2 Large seabird and pinniped colonies

This archive contains indicative distribution maps and profiles for MT2.2 Large seabird and pinniped colonies, a ecosystem functional group (EFG, level 3) of the IUCN Global Ecosystem Typology (v2.1). Please refer to Keith et al. (2020) and Keith et al. (2022) for details. The descriptive profiles provide brief summaries of key ecological traits and processes, maps are indicative of global distribution patterns, and are not intended to represent fine-scale patterns. The maps show areas of the world containing major (value of 1, coloured red) or minor occurrences (value of 2, coloured yellow) of each ecosystem functional group. Minor occurrences are areas where an ecosystem functional group is scattered in patches within matrices of other ecosystem functional groups or where they occur in substantial areas, but only within a segment of a larger region. Given bounds of resolution and accuracy of source data, the maps should be used to query which EFG are likely to occur within areas, rather than which occur at particular point locations. Detailed methods and references for the maps are included in the profile (xml format).本归档文件包含MT2.2 大型海鸟与鳍足类集群的示意性分布地图与概况文档，该类集群属于世界自然保护联盟（International Union for Conservation of Nature, IUCN）全球生态系统分类体系（v2.1）下的三级生态系统功能群（Ecosystem Functional Group, EFG）。详细信息请参阅Keith等人（2020）与Keith等人（2022）的相关研究。 本数据集附带的描述性概况文件会对关键生态特征与生态过程进行简要概述；分布地图仅用于展示全球尺度的分布格局，而非精细尺度的具体分布情况。该类地图标注了全球范围内各生态系统功能群的主要分布区（赋值为1，以红色标注）与零星分布区（赋值为2，以黄色标注）。其中，零星分布区指的是某一生态系统功能群以斑块状零散分布于其他生态系统功能群的基质中，或是仅在大区域的局部片段内形成大面积分布的区域。鉴于源数据的分辨率与精度存在局限，此类地图仅应用于查询某一区域内可能存在的生态系统功能群，而非特定点位的实际分布情况。该类地图的详细制作方法与参考文献均收录于该概况文件（xml格式）中。