山西云顶山亚高山草甸优势种群和群落的格局分析

应用DCA排序与双项轨迹方差法相结合的方法,对云顶山亚高山草甸优势种群和群落的分布格局进行了分析.结果表明,群落格局与其优势种的格局关系密切,披针苔草 车前群系、披针苔草 蒲公英群系和嵩草 车前群系的格局差异明显,种群和群落的分布格局不仅受种的生物学特性影响,还受环境因子制约.图4表1参19

Pattern Analysis of Dominant Species and Communities of Subalpine Meadow in the Yunding Mountain, Shanxi

Pattern analysis of population and community is important to reveal community structure and becomes a key topic in modern plant ecology. Subalpine meadow in the Yunding Mountain of Shanxi, one of the most typical mountain meadows in Northeast China, is located in an area with an elevation between 2 620~2 720 m. Based on the field investigation of community transect, the detrended correspondence analysis (DCA) ordination technique combining two-term local quadrat variance (TTLQV) method was used for pattern analyses of dominant species and communities of the subalpine meadow in the Yunding Mountain. The results showed that the combining application of the two methods could successfully reveal community structure and the pattern of communities was closely correlated with that of dominant species. The patterns of Form. Carex lanceolata Plantago asiatica, Form. Carex lanceolata Taraxacum mongolicum and Form. Kobresia bellardii Plantago asiatica were significantly different from each other. Also, the scale of each pattern was gradually increasing with the rising of elevation. Besides, the patterns of dominant species and communities of the subalpine meadow were not only related to the biological characteristics of species, but also affected by the environmental factors. The small patches scale of dominant species varied from 40 cm to 150 cm, while the big one usually varied from 470 cm to 640 cm. The results well revealed the characteristics of species distribution and community structure of the subalpine meadow in the Yunding Mountain. Fig 4, Tab 1, Ref 19