SPECIES RESPONSES TO DIFFERENT TYPES OF HUMAN-CAUSEDHABITAT DEGRADATION Dynamical simulation of alien invasion under sustained habitat change and its impact on native species The influence of habitat destruction on the ecological effect of metapopulation The evolution characters of the best competitor of metapopulation The driving forces of species extinction in fragmented habitat Theoretical framework of metapopulation and progress in application Metapopulation dynamics response to the spatial heterogeneity of habitat destruction The mechanism of species extinction under habitat destruction at different rates