森林—草原交错带白桦林和山杨林植物多样性研究  

STUDY ON PLANT DIVERSITY OF BETULA PLATYPHYLLA AND POPULUS DAVIDIANA FORESTS IN FOREST STEPPE ECOTONE

作　　者：王庆锁[1] 刘涛[2] 冯宗炜[3] 罗菊春[4] 张希和 

机构地区：[1]中国农业科学院畜牧研究所,北京100094 [2]中国林业科学研究院林业研究所,北京100091 [3]中国科学院生态环境研究中心,北京100080 [4]北京林业大学森林资源与环境学院,北京100083 [5]河北省塞罕坝机械林场,河北068466

出　　处：《林业科学》2000年第z01期110-115,共6页Scientia Silvae Sinicae

基　　金：国家自然科学基金!项目 ( 3 93 70 5 61)资助

摘　　要：Betula platyphylla and Populus davidiana forests of the forest\|steppe ecotone in northern Hebei and eastern Inner Mongolia are abundant in plants,which are,at least,35 families,95 genera and 117 species.The plant species decrease and a diversity reduces from east to west in the ecotone because of gradually low precipitation.β diversity index reaches peak at the different limits such as those between the ecotone and the forest,and the steppe,and between the forest meadow and the meadow steppe zone in the ecotone.The plant diversity is closely related to climate,the community organization and succession.Betula platyphylla and Populus davidiana forests of the forest\|steppe ecotone in northern Hebei and eastern Inner Mongolia are abundant in plants,which are,at least,35 families,95 genera and 117 species.The plant species decrease and a diversity reduces from east to west in the ecotone because of gradually low precipitation.β diversity index reaches peak at the different limits such as those between the ecotone and the forest,and the steppe,and between the forest meadow and the meadow steppe zone in the ecotone.The plant diversity is closely related to climate,the community organization and succession.

关 键 词：植物多样性 白桦林 山杨林 森林-划原交错带 

分 类 号：S718.5[农业科学—林学] Q948.158[生物学—植物学]