【摘要】 采用常规野外调查法对金佛山国家级自然保护区南、北、西3坡向不同海拔梯度的植物群落优势种和植物多样性进行调查研究。结果表明:①海拔1 840 m处,乔木层的优势种都是常绿阔叶树种,其他海拔区域乔木层的优势种未呈现规律性;西坡不同海拔高度乔木层的优势种都属于常绿阔叶树种,而其他坡向未呈现规律性;北坡840 m和西坡840 m处的灌木层优势种都为乔木幼树,分别是四川大头茶(Gordonia acuminate)幼树和油茶(Camellia oleifera)幼树;海拔1 840 m处,各坡向草本层以阴生的植物为优势种。②西坡1 340 m和北坡1 840 m处植物群落物种多样性最高,受到严重干扰的山顶和南坡1 840 m处物种多样性最低而北坡1 340 m和南坡1 340 m处在受到干扰的情况下仍表现出较高的物种多样性。③植物群落内各层的物种丰富度的大小顺序依次为草本层>乔木层>灌木层,而群落多样性指数的大小顺序依次为乔木层>草本层>灌木层。更多还原

【Abstract】 Dominant plant species and plant community diversity were investigated at different altitudes in the Jinfo Mountain Nature Reserve.The results showed that: 1) The dominant plant species of arbor layer at altitude of 1 840 m of each slope belonged to the same type which was evergreen broad-leaved forest.However,the dominant plant species of arbor layer at other altitude were of different vegetation types.The dominant plant species at each altitude of west slope were species of evergreen broad-leaved forest,the dominant plant species of arbor layer of other slopes were of different vegetation types.The dominant plant species of shrub layer at 840 m of north and west slope were saplings of Gordonia acuminata & Camellia oleifera.At altitude of 1840m of each slope,the dominant plant species of herb layer were shade plants.2) The biodiversity at 1 340 m of west slope and 1 840 m of north slope of Jinfo Mountain Nature Reserve were the highest.The biodiversity of the peak and the plot at 1 840 m of south slope was the lowest,while the two plots were suffered from high level disturbance.3) Generally the species richness order was that the herb layer>arbor layer>shrub layer,the diversity index order was that the arbor layer>herb layer>shrub layer.更多还原