Indicative distribution map for Ecosystem Functional Group T6.2 Polar/alpine cliffs, screes, outcrops and lava flows

This archive contains indicative distribution maps and profiles for <strong>T6.2 Polar/alpine cliffs, screes, outcrops and lava flows</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).本档案包含**T6.2 极地/高山悬崖、碎石坡、裸露岩基与熔岩流**的示意性分布图与概况文档，该类群属于国际自然保护联盟（International Union for Conservation of Nature, IUCN）全球生态系统分类法（v2.0）中的生态系统功能群（Ecosystem Functional Group, EFG，三级）。详细信息请参阅Keith等人（2020）的研究成果。 概况文档简要总结了该类群的关键生态特征与生态过程；分布图仅用于示意全球分布格局，而非精细尺度的分布情况。本分布图标注了全球范围内该生态系统功能群的主要分布区（数值为1，以红色标注）与次要分布区（数值为2，以黄色标注）。其中，次要分布区指该生态系统功能群以斑块状散布于其他生态系统功能群的基质中，或仅在大区域的局部片段内呈大面积分布的区域。鉴于源数据的分辨率与精度存在限制，本分布图仅应用于查询某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。分布图的详细制作方法与参考文献已收录于概况文档（XML格式）中。