上游充通大￥ 6.1环境变化 SHANGHAI JIAO TONG UNIVERSITY Figure 5.13 Proportion of each terrestrial ecoregion covered by protected areas,2011 alearctic Nearctic Protected area coverage ☐Less than10% ☐10-30% ☐30-50% `☐More than50% Indo-Malay Oceania Afrotropic Neotropic Australasia Antarctic Source:IUCN and UNEP-WCMC 20116.1 环境变化