干旱区生态环境知识资源中心

Establishment of protected areas is one of the most important approaches for biodiversity conservation. Up to 2015, China has established 2740 sites for nature reserves with a total area of 1470300 km(2), covering 14.8% of Chinese land surface. Based on remote sensing inversion, model simulation and spatial analysis methods, we analyzed spatial and temporal variations of habitat from the vegetation fraction, net primary production, and their driving forces in different types and clime zones on the typical national nature reserves of China in the first 15 years of the 21st Century. And we then evaluated nature reserves in habitats and biodiversity protection. Results show that from 2000 to 2015, the vegetation fraction of national nature reserve increased from 36.3% to 37.1%, various types of nature reserve improved to some extent. The forest ecology national nature reserves lead annual growth of 0.11%, grassland meadow 0.84%, inland wetlands 0.21%, desert ecological 0.09%, wild animals 0.11% and wild plants 0.08%. For net primary production, grassland meadow, inland wetlands, desert ecology, wild animal had a growth of 2.06 g.m(-2).a(-1), 1.23 g.m-(2).a(-1), 0.28 g.m(-2).a(-1) and 0.4 g.m(-2).a(-1) respectively, the forest ecological and wild plants nature reserves respectively with a reduce rate of 3.45 g.m(2).a(-1) and 2.35 g.m(-2).a(-1). Nearly 15 years, national nature reserve had a weak change in human disturbance, from 5.72% to 4.83%.