Millennium Ecosystem Assessment: MA Ecosystems

The Millennium Ecosystem Assessment: MA Ecosystems provides data and information on the extent and classification of ecosystems circa 2000, including coastal, cultivated, forest and woodlands, inland water bodies, islands, marine, mountains (elevation), polar, and urban. The data set also includes socioeconomic reporting Units and the location of regional MA projects. The data were used in a number of different ways in the assessment, contributing to an understanding of how humans have altered ecosystems, how changes in ecosystem services have affected human well-being, and how ecosystem changes may affect people in future decades.

千年生态系统评估（MA Ecosystems）提供了关于2000年左右生态系统范围和分类的数据和信息，包括沿海、栽培、森林和林地、内陆水体、岛屿、海洋、山脉（海拔）、极地以及城市生态系统。该数据集还包括社会经济报告单位以及区域MA项目的位置。在评估中，这些数据以多种方式被使用，有助于理解人类如何改变生态系统，生态系统服务的变化如何影响人类福祉，以及生态系统变化在未来几十年可能对人们产生的影响。