请写作达人帮忙看看,论文摘要中有没有语法错误?

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请写作达人帮忙看看,论文摘要中有没有语法错误?
是否地道?哪些需要修改?
Abstract:Slope aspect has a significant effect on the
development and distribution of montane forest,especially in arid and semiarid
regions.This paper,using SPOT5 images and 1:50000 DEM,extracts and analyzes
detailed spatial information of montane coniferous forest (mainly Qinghai
spruce),and thereby explores how the upper and lower limits and altitudinal
range of the coniferous forest vary along all the aspects and how annual
insolation affects the area of coniferous forest in the Helan Mountains located
in the transitional zone of arid and semiarid areas of China.It concludes that:
1) in the eastern flank of the Helan Mts.,the lower limit of coniferous forest
is between 1600~2000m asl.,and the upper limit between 2800~3000m asl; in the
western flank,the lower limit of coniferous forest is between 2000~2300m asl.,
and the upper limit between 2800~3100m asl.2) The area of coniferous forest
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