%0 Journal Article
%T PLANT DIVERSITY IN QIANYANZHOU AFTER 20 YEARS OF SMALL WATERSHED TREATMENT<br>小流域治理20年后的千烟洲植物多样性
%A LIU Qi-Jing
%A HU Li-Le
%A LI Xuan-Ran
%A <br>刘琪璟
%A 胡理乐
%A 李轩然
%J 植物生态学报
%D 2005
%I Editorial Office of Chinese Journal of Plant Ecology
%X The species diversity of a small watershed was investigated following 20 years treatments. Our results showed that the species dominance index of the upper forest canopy layer was higher than other layers and was higher in the artificial forests than that in secondary forests and Liquidambar formosana stands. As a whole, the dominance index for the shrub layer of the 12 communities investigated was small, averaging 0.17. For the herb layer, the dominance index was high in the Ass. Imperata cylindrica var. major community (0.53) and the Ass. Loropetalum chinense-Bromus remotiflorus community (0.51). The species diversity index was high in the canopy layer of the L. formosana forest and natural Pinus massoniana forest but was low in other communities and, in particular, was lowest in the artificial forests. For the canopy layer, the species diversity index was the highest in the L. formosana forest (2.61). A similar trend was found in the subcanopy layers with the highest value found in the P. massoniana + P. elliottii forest. Also, the species diversity index was higher in the artificial forests than that in the secondary forests except for the P. massoniana + Litsea cubeba and Castanea mollissima + L. formosana forests. The richness index was the highest in the shrub layer for all communities and was similarly high in both the canopy and herb layers as the shrub layer in the L. formosana forests. The richness index was higher in secondary forests than that in artificial forests. The evenness index or uniformity index in the herb layer was higher than that in the shrub layer except for the Ass. Ldoropetalum chinense-Bromus remotiflorus and Ass. I. cylindrica var. major stands. For the canopy layer, evenness was as high as 0.76 in the Ass. C. mollissima + L. formosana and Ass. P. massoniana + L. cubeba stands whereas other artificial forests had lower values than that in secondary forests and L. formosana stands. In the shrub layer, evenness was the highest in the artificial forests except for the Castanea + Liquidambar forest. The diversity indices showed large differences between the shrub layer and other communities, and the L. formosana forest showed properties that can be considered atransitionaltype between artificial and secondary forests.
%K Plant diversity
%K Small watershed treatment
%K Forest community types
%K Plantation<br>植物多样性
%K 小流域治理
%K 植物群落类型
%K 人工林
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=2F2173CCFF292BF447DC2681EA33BBAE&aid=1B089173379AFB77&yid=2DD7160C83D0ACED&vid=771469D9D58C34FF&iid=94C357A881DFC066&sid=34A7AB0452E6AF23&eid=786A9BAE5CF9B9EE&journal_id=1005-264X&journal_name=植物生态学报&referenced_num=16&reference_num=30