Study On The Community Ecology Of Fagus Lucida Deciduous Broad-leaved Forest

In this study, we do some research on the Community Ecology of Fagus lucida deciduous broad-leaved forest in Taining Emeifeng Nature Reserve, Fujian province. Fagus lucida deciduous broad-leaved forest was investigated by adopting the typical sampling method. The results can be analyzed from tne following aspects:flora, species diversity, community dominance, population structure, niche and interspecific association. The main conclusions are as follows:(1) In the Fagus lucida community, the statistics will be investigated according to the areal types of plants from the genera level. They are cosmopolitan, pan-tropical distribution, tropical Asia and tropical Oceania, the north temperate zone and the south temperate disjuncted, East Asia&North America disjuncted, as well as distribution of East Asia. According to the ingredients analysis, we can know that the proportion of pan-tropical geographical elements and north temperate are larger. The quadrat will gradually transition from subtropical to warm temperate.(2) There are rich species diversity indexes in Fagus lucida community, The Shannon-Wiener index of shrub layer is3.34; the Shannon-Wiener index values of the tree layer and herb layer are3.04and2.95; the Pielou index value of shrub layer is0.88, The Pielou index value of the tree layer and herb layer are0.83and0.81. Each index shows that the index of shrub layer is lager than tree layer and herb layer.(3) Starting from the elevation of1480m, with increasing elevation, the diameter size class of Fagus lucida population sizes range from6to2. The larger diameter at an altitude of1480-1499m is absent. With the increase of elevation, population structure transition from growth population to recession.(4) With increasing elevation, The diameter class range of Fagus lucida population are reduced and population structure will be shifted from growth population to recession-type.(5) The niche width of the top3are Rhododendron latoucheae, Camellia chekiangoleosa and Fagus lucida. Their values are1.81,1.309and1.251. The niche overlap value between Fagus lucida and Malus huphensis is0.395, The niche overlap value between Fagus lucida and Syplocos phyllocalyx is0.403. According to the results above, we can conclude that species may have a greater niche overlap value if they have a greater niche breadth value.(6) The species of tree layer and undergrowth layer are both less significant positive correlation, so Fagus lucida communities are to the stable stage of development.