Evolutional characteristics of forest landscape structure and its internal driving mechanisms in Jinzhai County

Eastren Anhui Province from 1985 to 2011 were studied by taking TM images of 1986

1996 and 2011 as data sources and using landscape indices analysis based on GIS and RS technology. Results showed that Jinzhai's woodland area continued to grow

arable land continued to decrease

and other landscape types increased or decreased by different amplitudes in the past 25 years. From 1986 to 1996

patch density

fractal dimension and Shannon evenness index changed negatively

the speed of landscape heterogeneity accelerated

and landscape pattern was in the severe situation of complex and fragmentation. From 1996 to 2011

after the "Grain for Green" project

the indicators changed positively

the situation of landscape fragmentation was effectively curbed

and landscape pattern turned to equalization and regularization. As a result

landscape structure has been optimized obviously. Natural geographical environment and the implementation of the "Grain for Green" project are the main driving forces for the formation of the evolutional characteristics of forest landscape pattern.