| As one part of Hunan Nanshan National Park,Jintongshan National Nature Reserve in Hunan Chengbu has significant values for ecology,humanism and the nature.By analysing and evaluating the landscape pattern changes,making quantitative analysis on the spatial distribution characteristics of landscape components,and evaluating the forest landscapes combining the quality and quantity,we can get a clear picture of natural resourse distribution of the reserve.Based of Landsat remote sensing image data in 2005 and 2015,basically analysing the landscape pattern and the landscape ecological quality of the study area,the analyse and evaluation of Mount.Jintong area is mainly unfolded from two levels,including reserve level and landscape type level through AHP and PCA.The research conclusions are as follows:Extract the landscape types of the two multi-spectral images by means of RS and GIS techniques.The conclusion shows the landscape can be divided into 8 types,which includes evergreen broad-leaf fore,broadleaved deciduous forest,evergreen deciduous forest,coniferous forests,bamboo grove,brushland,cultivated land,grassland.This article analysed the landscape pattern of Mount.Jintong area from three aspects,including topography factors,landscape index and ecological quality evaluation.When analysing from the topography factors,the result shows that there is a strong correlation between the landscape distribution and topography factors,and different landscape types prefer different topographic positions.According to the analysis of landscape index factors,more than 88%of the study area was forest landscape,in which deciduous broad-leaved forest replaced evergreen broad-leaved forest as the new landscape matrix in 2015 with other landscape types embedded in it.Deciduous broad-leaved forest and evergreen broad-leaved forest constituted the dominant landscape.In the past decade,the overall fragmentation of the study area increased,the landscape aggregation decreased,and the landscape diversity showed an increasing trend,and the distribution of various landscape types become more even.From the ecological quality evaluation result of overall level and landscape type level,we can get the following conclusions:judging from the overall level,the forest landscape ecological quality index is 0.87,grade ?,and the ecological quality is good.In eyes of landscape type level,the landscape pattern quality of the reserve has been improved in the past decade,and the ecological quality of deciduous broad-leaved forest,evergreen broad-leaved forest,deciduous broad-leaved forest and shrub forest is better than other landscape types.This paper evalutated the landscape pattern from landscape type level by means of PCA and comprehensive evaluation index method.The evaluation result shows that the overall quality of the landscape pattern is improved.From the perspective of landscape type pattern,the overall landscape types of the study area presented an optimization trend in the past decade.In 2005,the landscape type which had the best landscape pattern quality is the evergreen broad-leaved forest,which turned to be deciduous broad-leaved forest in 2015.The landscape types whose landscape pattern quality were improved are deciduous broad-leaved forest,bamboo forest,shrub forest and pasture,and the evergreen broad-leaved forest had a declining landscape pattern quality,and the grades of evergreen,deciduous broad-leaved forest and cultivated land remained the same.Based on the analyse and evalutaion result,we put forward the following proposals:(1)Strenthen the management of artificial afforestation and balance between cultivated land with forestland.(2)Adjust stand structure and improve biodiversity.(3)Reinforce the management to ecotourism in the reserve.(4)Guide the landscape planning and construction from the perspective of landscape pattern,reinforce the monitering and management to each landscape type. |
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