【摘要】 对陕西佛坪自然保护区植被优势植物的区系地理特征、主要植被类型及其时空动态特征进行了讨论。本区属中国 日本森林植物区系的一部分 ,温带分布属占较大比例 ,热带分布属也占相当比重。低中山森林植被优势植物以华中、华北及华东成分为主 ,亚高山灌丛及草甸则主要由唐古特成分及中国 喜马拉雅成分构成 ,本区可被视为我国温带植物区系的典型地区。本区植被可分为 3个垂直自然带 :( 1 )落叶阔叶栎林带 ( 2 0 0 0 m以下 ) ;( 2 )落叶阔叶桦林带 ( 2 0 0 0～ 2 5 0 0 m) ;( 3)针叶林带 ( 2 5 0 0 m以上 )。本区较广泛出现的油松 ( Pinus tabulae formis)和华山松 ( P.armandii)仅能在裸岩陡坡上发展为稳定群落 ,故不能作为植被垂直带划分的标志。更多还原

【Abstract】 Foping Nature Conservation (FNC) is the northernmost and easternmost distribution area of giant panda in China.The geographical elements of FNC vegetation are very complex because this region is a convergent and transitional zone of many floristic compositions.The genera of seed plant of tempe rate distribution patterns take a predominated position, and the tropical elements are also comparatively rich.The vegetation of FNC could be divided into three vertical zones:(1) deciduous broad leaved oak forest zone (below 2000 m),mainly including Quercus variabilis forest, Q.aliena var. acuteserrata forest and Q.serrata var. brevipetiolata forest;(2) deciduous broad leaved birch forest zone (2000～2500 m),in which Betula albo sinensis forest and B.albo sinensis var. septentrionalis forest are the symbol;(3) subalpine coniferous forest zone (above 2500 m),where almost all the space are occupied by Abies fargesii forest.There are also many communities in or among these vertical zones.Pine forest can not be recognized as the typical symbol of vegetation vertical zone in this area since they are in the risk of replacement by oak forest.更多还原