Community Diversity And Different Relationship Between Landscape Pattern Analysis In Southwestern Montane Evergreen Broad-leaved Forest

Forest ecosystem is a natural complex formed under the action of a certain structure, function and regulation of forest community and the environment function flow, which is the largest area in terrestrial ecosystem and the most important natural ecological system. The analysis of forest landscape patterns can be started from macroscopic forest structure, composition and ecological process, which can provide scientific evidence for sustainable forest management. Evergreen broad-leaved in mountainous areas is the main component of forest community. The study of the relationship between community diversity and landscape patterns can provide fundamental materials for the research of forest system, The results are as follows.(1) The result shows that 5714 arbor tree species of 114 kinds are included in 84 samples from the survey, while 1138 shrub species of 62 kinds and 1693 herbs of 29 kinds are included in 34 selected samples. Communities are divided into 6 types and they are mangrove forests (Castanopsis fargesii), mangrove (Castanopsis fargesii)+Suzuki Lin (Eurya japonica), nanmu forests (Phoebe zhennan), Quercus serrata forest (Quercus serrata), the chinese photinia (Photinia beauverdiana), mountain aoki Lin (Meliosma kirkii). The order of six community diversity is as follows, mangrove forest> The chinese photinia> mangrove+Suzuki forest> Quercus serrata forest> namu forests> mountain aok. As it has a low altitude gradient, the structure complexity of forest community and the index of community diversity become higher as the altitude rises.(2) Mangrove forest in the whole community types accounted for a large advantage, Shan timber has an important position, and Quercus serrata forests, mangrove+Eurya lumber and China accounted for the entire community types Shinan Lin relatively centered, Phoebe forest types throughout the community accounted forlt is relatively small, but six community types are more serious fragmentation; the overall stability of the forest landscape of the study area as a whole is good, the chinese photinia as plantation landscape structure is more stable.Mountain aok, Phoebe forests both landscape disruption strong, relatively poor stability.(3) In general, diversity index and landscape shape index showed a significant negative correlation, the complexity of the shape of the landscape has a more significant impact on the diversity of the entire region.1250m scales scale for the best research article, correlation can be seen, with a more complex landscape and a low degree of landscape fragmentation in general have a high biological diversity, and the spread of the entire diversity plays a major the influence.