摘要
河北北部、内蒙古东部森林-草原交错带富于高的生物多样性。在森林-草原交错带森林草甸区森林斑块的数量最多，其次为森林带，再次为森林-草原交错带草甸草原区，草原带没有森林斑块。植物群落的α多样性在森林群落和草原群落表现不同，森林群落从森林带到草原带依次减低；草原群落则表现出在森林-草原交错带植物多样性高，特别是在森林草甸区最明显。在森林-草原交错带β多样性指数较高，表现在产多样性指数在森林-草原交错带与森林带和草原带之间以及森林-草原交错带内森林草甸区和草甸草原区之间的边界不同程度地出现峰值。
The forest-steppe ecotone in northern Hebei and eastern Inner Mongolia is characterized by high biodiversity. The number of forest patches in forest-meadow regions is greater than that in the forest zone and in meadowsteppe regions. Diversity of forests decreased from the forest zone in the east to the steppe zone in the west via an ecotone. Steppe diversity, however, is characterized by higher plant diversity in the ecotone, especially in the forest-meadow region. β diversity indices of plant communities reached peak values at the boundaries between the ecotoneand the forest zone or the steppe zone, and between the forest-meadow region and the meadow-steppe region withinthe ecotone.
出处
《植物生态学报》
CAS
CSCD
北大核心
2000年第2期141-146,共6页
Chinese Journal of Plant Ecology
基金
国家自然科学基金!39370561
