太行山阜平县龙泉关人工刺槐林群落与次生灌草丛群落的比较

研究了人工刺槐林群落与灌草丛群落的种类组成、生活型谱、垂直结构、生态优势度和均匀度指数.人工刺槐林群落垂直结构复杂 ,物种数目增加 ,生活型谱更接近典型的暖温带落叶阔叶林群落类型 ,灌木层的物种多样性指数、均匀度指数较灌草丛群落的灌木层低 ,生态优势度较高 ;林下草本层与灌木层相比其生物多样性指数、均匀度指数和生态优势度指数均较高.这表明人工刺槐林群落对灌草丛群落有明显的改造作用.

Comparison between Artificial Robinia pseudoacacia Community and Secondary Herbal Shrub Community at Longquanguan, Fuping County in Taihang Mountain

The author comparatively analyzed flora composition, life form spectrum, vertical stratification, species diversity index,ecological dominance index and evenness index between am artificial Robinia pseudoacacia cormmunity and a herbal shrub community distributing typically at a disturbed slope near residential area in Longquanguan,Fuping County in Tathang Mountain. The results were as followsThe stratification of the artificial Robinia pseudoacacia community with larger number of species was more complicated than that of the herbal shrub community with a few species. The life form spectrum of the artificial Robinia pseudoacacia community was close to that of the typical warm temperate deciduous broad - leaved forest. Species diversity index amd evenness index in the shrub layer of the artificial Robinia pseudoacacia community were lower than that of the herbal shrub community, but the ecological dominance index being larger. Species diversity index, evenness index and ecological dominance index in the henhal layer of the artificial Robinia pseudoacacia community were all larger than these of the herbal shrub community. This proved that afforestation or man - made forest cam modified greatly the herbal shrub community type amd ecological environment.