The Gully Ecological Community Dynamics And Competition In The Recovery Process

1.Studying on the community dynamics during ecological restoration of the wind- damage slash in Jinyun mountain. The seeding dynamic, community structure and species diversities of the wind-damaged slash after 11-year restoration were studied. The results were as followings: 1) Pinus massoniana and Gordonia acuminata seeding were dominated in the first and second years. After 8-year restoration Castanopsis carlessii var. spinulosia, Symplocos satchuenesis and others evergreen broadleaf trees seeding increased, Pinus massoniana and Gordonia acuminata seeding decreased, after 11 years, Castanopsis carlessiivar spinulosia , Symplocos satchuenesis and others evergreen broadleaf trees seeding dominated. There was no Pinus massoniana seeding and Gordonia acuminata seeding was very few. 2)The vertical structure of community tended to be complex, while the horizontal one increased by a wide range.3)The species diversity and evenness of trees layer increased, the ecological dominance decreased. The community becomes more complicated and multiple-layered evergreen broadleaf forest. 2.Compered the structure of the wind-damaged slash in Mt. before wind-damaged with that after 11 years of restoration. The results were as followings: 1) The vertical structure of community before wind-damaged slash was outstanding while not after 11-year restoration.2) The biological spectrum were similarity, both are everygreen phanerophytes. The made of the species of community are almost same, Lauraceae, Fagaceae, Theaceae and Pinaceae were the most. There are needle-broad forest before wind-damaged, it edificatory was Pinus massoniana. But 11-year restoration was everygreen broadleaf forest, it edificatory is Castanopsis carlessii var. spinulosia. 3. Studying on the competition in the course of ecological reconstruction of wind-damaged slash in Mt. Jinyun Using Hegyi?single tree competitive index modle, We quantitatively analysed the intraspecific and interspecific competitive intensity of Pmassoniana G.acuminata C.carlessii var spinulosa S.setchunensis.The dominant species ecological reconstruction of the wind-damaged slash. The results are: 1 )The intraspecific of objective species in wind-damaged slash were more intensive than their interspcific competition with other accompanying species. 2).The competitive intensity seemed to be powerful function of DBH. of the objective trees. 3). Growth of the objective tree was negatively correlated to the competitive indices. 4.This paper studied on the dynamics of dominant population during ecological restoration and forecasted the dynamics of the domination species of wind-damaged slash in Jinyun mountain. The study showed that the succession of community is toward the climax community of the evergreen broadleaf, and that the Castanopsis carlessii var.spinulosa will be the edificatory of the climax community.