THE PRESENT CONDITIONS OF ECOLOGY AND BIO-DIVERSITY PROTECTION AT UPSTREAMS OF MINJIANG
岷江上游生态学现状及生物多样性保护

Administratively,the upstreams of Minjiang consists of 5 counties of Wenchuan,Maowen,Lixian,Heishui and Songpan where concentrate Qiang,Tibetan and Hui nationalities.The luxuriant forests in the region should have provided natural barrier of the upstreams of Minjiang,however,these woodlands are mostly distributed on the slopes of high mountains and deep gorges.The long term overcutting has greatly reduced the water storage and conservation capacity of these forests,damage of bio diversity,frequent occurrence of natural disasters,increase of debris flows and landslides,and constant expansion of desertified area.The rich forest,grassland,waterpower,mineral and tourist resources possess great potential economic strength which provided excellent conditions for the rehabilitation of ecology of the region after felling trees was forbidden in 1998.The campaign of developing the western regions provides opportunities for the ecological rehabilitation,protection and sustainable utilization of biodiversity in the region,but it still faces long arduous task.