The highest increases in the number of reserves in 1980s and in the area in 1990s show that the con struction of larger reser ves to protect broad ecosystems has been considered in management practice.

• 保护区数量在80年代增幅最大，面积在90年代增幅最大，这种不同步性在一定程度上反映出保护区经营管理更加注重建立较多的大保护区，保护较大的生态系统。