Abstract: A spatially explicit landscape model LANDIS was applied to simulate the forest landscape changes under four management alternatives (no cutting, clear cutting, selective cutting Ⅰ and Ⅱ) in Youhao Forestry Bureau located in Small Xing’an Mountain from 2000 to 2200. The outcomes from LANDIS were combined with a landscapelevel habitat suitability index (HSI) model in a GIS environment to assess Sciurus vulgaris habitat quality. The results showed that the increase of suitable habitat area and the decrease of marginally suitable area were the fastest under no cutting scenario, and the slowest under clear cutting scenario. Suitable habitat area increased faster while marginally suitable area decreased more slowly under selective cutting Ⅰ scenario than under selective cutting Ⅱ. Overall, the optimal management alternative of S. vulgaris habitat was in the sequence of no cutting, selective cutting Ⅰ, selective cutting Ⅱ, and clear cutting.

Key words: UV-B radiation, chlorophyll, spectrum, red edge, inverted Gaussian model, Myrica rubra.