| Landscape pattern analysis was an important part of the study on ecosystem structure and function, the calculation of biomass and carbon storage of vegetation provided a numerical basis for the study of carbon cycle in ecosystem.Using ZY-3 image, under the support of ENVI4.3, ArcGIS and Fragstats, the landscape was classified in Jieshi groove watershed,Taiyue mountain, Shanxi Province. The landscape pattern characteristics, landscape heterogeneity, diversity and fragmentation degree were also analyzed. Meanwhile, according to the sample data, laboratory data and forest resources inventory data, the biomass and carbon storage of various vegetation types in the area were calcluted,the the carbon spatial distribution pattern were also analyzed.The aim was to provide reference for landscape planning management and ecological benefit evaluation by analyzing the regional landscape stability from the perspective of landscape structure and function.The results showed that:(1) It included 11 landscape types in the region. Forest was the matrix, the road was the corridor of the region.other landscape types, such as Shrub forest land, grassland, cultivated land, bare rock, residential land were embedded in the whole region.The characteristics of Jieshi groove were rich of landscape diversity, high level of heterogeneity and rich landscape types.(2) Among the landscape elements, the mature Larix principis-rupprechtii as the controlling landscape element accounted for 32.3% of the total area. There were large area patches with better connectivity. The average biomass and carbon storage of mature Larix principis-rupprechtii were 244.01t·hm-2,122.49t·hm-2, which was the largest vegetation carbon pool in the area, mainly distributed at the altitude 1800-2300 m range.The interior of the landscape element tended to be stable with a low level of heterogeneity and strong anti-interferenc ability.The near mature and middle age of Larix principis-rupprechtii were mainly distributed in the range above 2200m altitude which had simple patch shape,low level of heterogeneity and great carbon storage potential. The mixed forest and sparse forest land were scattered at the altitude 1800-2300 m range, which had complex patch shape, high degree of fragmentation, high level of heterogeneity and less carbon storage.Therefore,the two landscape elements were potentially unstable factors in the area with a poor anti-interference ability.The distribution area of grassland and shrub forest was small, which accounted for 4% and 2.97% of the total area,and the average carbon storage was 8.10 and 6.30 t·hm-2. The residential land and cultivated land were mainly distributed in the area below 1800m that was relatively flat.(3) Among each altitude range, the vegetation carbon storage in the 1900-2200m range was relatively large, and the landscape diversity and the level of heterogeneity were in the middle level. At an altitude of above 2400m, the landscape diversity was poor, the level of heterogeneity and the degree of fragmentation were low. The landscape diversity was good, the level of heterogeneity and the degree of fragmentation were higher at the altitude of 2200-2400m and below 1800m ranges. The carbon storage of arbor was influened by different hydrothermal conditions with different altitude, the carbon storage of Larix principis-rupprechtii reached the maximum at the altitude of 2200m. |
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