| With the effects of reducing flood peak,soil and water conservation,water purification,woodland is significant for maintaining the ecological balance of the earth and Human survival&development.As an important water conservation forest reserve,the woodland in Fujian Province is the important ecological barrier in Fujian.Therefore,it is of great significance to grasp the rules of woodland landscape structure and spatial variation in Fujian Province,and the scale effect of spatial heterogeneity,as well as the prediction on the possible development trend of forest resources to further maintain and keep the ecological stability of Southeast China.The main contents and achievements are summarized as follows:(1)Classification of woodland landscape types in Fujian.According to the purpose of the study,combined with the ability to recognize the image and reference to the relevant provisions and existing research,the woodland landscape types of Fujian Province can be divided into 6 types:coniferous forest,broad-leaved forest,mingled forest,shrub land,open forest land,other forest.(2)Study on the law of influence of topographic factors to woodland landscape pattern.Based on the analysis of woodland landscape classification map of Fujian and superposition of three topographic factors,it is concluded:the elevation,waviness and harshness are related to the distribution of forest landscape types in Fujian Province.According to the analysis of woodland landscape pattern based on elevation,each woodland landscape in 1990,2000,and 2010 was concentrated in the 380-1058m elevation region.The analysis on woodland landscape based on waviness concludes that,each woodland landscape in 1990,2000,and 2010 was concentrated in the 50-200m waviness region.And the analysis on woodland landscape based on roughness concludes that,in 1990,2000,each woodland landscape in 1990,2000,and 2010 was concentrated in the 1.06-1.55 roughness region.(3)Landscape index analysis of woodland landscape pattern in Fujian.According to the meaning of landscape pattern index,a total of 14 indicators presenting landscape patch type level and landscape level are selected,the results show:from 1990 to 2010,the fragmentation degree of coniferous forest,mixed forest,and sparse forest land in patch level decreased,while the fragmentation degree increased in broad-leaved forest,shrub land and other forest land.In the landscape level index,the degree of fragmentation of forest landscapes in Fujian Province has been deepened year by year,and the degree of fragmentation and diversity have also increased.(4)Multi scale analysis of woodland landscape pattern in Fujian.Analysis on the landscape pattern of Fujian Province in different periods and different resolutions is carried out,and by using Moran's I index and semivariogram,the spatial scale effect of woodland landscape pattern is analyzed as well.The study shows that there is a significant positive spatial autocorrelation in woodland landscape pattern in Fujian Province;at the 210m granularity level,it is a sensitive point of landscape spatial autocorrelation to scale response.The fitting results of semivariogram model show that,for SHDI(Shannon's diversity index)and NP(Number of patches),it is an appropriate scale for 2km to study the spatial variation of f woodland landscape pattern in Fujian Province.(5)Simulation and prediction of woodland landscape in Fujian.Woodland landscape pattern of Fujian Province in 2010 is simulated and predicted by constructing CA-Markov model,and the actual forest landscape classification map of Fujian Province in 2010 is used for verification,the Kappa coefficient is thereby gained as 0.6283,indicating that there is a high consistency between the simulation map of woodland landscape pattern of Fujian in 2010 and the classification map of woodland landscape in Fujian Province in 2010,with high precision and good effect. |
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