山西灵空山国家级自然保护区天然油松林灌草物种多样性研究

Research on Shrub-grass Species Diversity of Pinus Tabuliformis Natural Forest in the Shanxi Lingkong Mountain National Nature Reserve

对山西灵空山国家级自然保护区天然油松林下灌木和草本植物组成及特征进行调查,分析其物种多样性指数,并进行等级评价。结果表明,天然油松林下灌木植物有23种,草本植物有28种,不同坡向的优势灌草物种明显不同。林下灌草植物总体多样性在阴坡最好,在半阳坡最差。各坡向林下物种多样性等级均达到了较好及以上水平,但阳坡灌木物种和半阳坡林下总体物种多样性阈值均接近较好水平的下限,需适当进行人为干预,促进其物种多样性的提高。

Species composition and characteristic of shrub and grass in Pinus tabuliformis natural forest in the Shanxi Lingkong Mountain National Nature Reserve were investigated,the species diversity were analyzed and their grades were evaluated.The results showed that there existed 23 shrub species and 28 grass species in Pinus tabuliformis natural forest.Dominant species of shrub and grass were significantly different among different slopes.The understory shrub-grass species diversity on shade slope was the best,while that on semi-sunny slope was the worst.The diversity of each understory species on different slope reached well grade or above.The threshold values of shrub species diversity on sunny slope and that of understory species diversity on semi-sunny slope approached the lower limit value which appropriate human intervention was needed to promote the improvement of their species diversity.