Indicative distribution map for Ecosystem Functional Group S2.1 Anthropogenic subterranean voids

This archive contains indicative distribution maps and profiles for <strong>S2.1 Anthropogenic subterranean voids</strong>, a ecosystem functional group (EFG, level 3) of the IUCN Global Ecosystem Typology (v2.0). Please refer to Keith <em>et al.</em> (2020) 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).本档案包包含**S2.1 人为地下洞穴（Anthropogenic subterranean voids）**的指示性分布地图与描述性概况文档，该类群属于国际自然保护联盟（International Union for Conservation of Nature, IUCN）全球生态系统分类体系（v2.0）中的生态功能群（Ecosystem Functional Group, EFG，等级3）。相关细节可参考Keith等（2020）的研究成果。 本描述性概况文档简要总结了该生态功能群的关键生态特征与生态过程；分布地图仅用于展示全球尺度的分布格局，并非用于呈现精细尺度的分布特征。地图将各生态功能群的分布区域划分为主要分布区（取值为1，以红色标注）与零星分布区（取值为2，以黄色标注）：零星分布区指该生态功能群以斑块状散布于其他生态功能群的基质中，或仅在更大区域的局部范围内形成连片分布。鉴于源数据的分辨率与精度限制，本地图仅可用于查询某区域内可能存在的生态功能群类型，而非特定点位的实际分布情况。该地图的详细编制方法与参考文献已收录于xml格式的概况文档中。