太宽河自然保护区板栗群落数量分类与排序

生态学杂志

太宽河自然保护区板栗群落数量分类与排序

廉凯敏¹,吴应建¹,张丽²,赵璐璐³,张峰^4**

（¹山西省中条山国有林管理局, 山西侯马 043000； ²山西省环境科学研究院, 太原 030027； ^3山西省生态环境研究中心, 太原 030009； ^4山西大学黄土高原研究所, 太原 030006)

出版日期:2015-01-10 发布日期:2015-01-10

Numerical classification and ordination of wild Castanea mollissima communities in Taikuan River Nature Reserve, Shanxi.

LIAN Kai-min¹, WU Ying-jian¹, ZHANG Li², ZHAO Lu-lu³, ZHANG Feng^4**

(¹Zhongtiaoshan Stateowned Forest Administration of Shanxi, Houma 043000, Shanxi, China; ^2Shanxi Academy of Environmental Research, Taiyuan 030027, China; ³Research Center for EcoEnvironmental Science in Shanxi, Taiyuan 030009, China; ^4Institute of Loess Plateau, Shanxi University, Taiyuan 030006, China)

Online:2015-01-10 Published:2015-01-10

摘要/Abstract

摘要：

根据野外调查数据，对太宽河自然保护区野生板栗群落进行TWINSPAN等级分类和DCA排序。结果表明：TWINSPAN将群落42个样方划分为11个群丛，分类结果很好地反映了群落类型与环境梯度的关系；DCA排序揭示了群落在该区的分布格局与环境梯度的关系；DCA样方排序图第一轴反映了群落生境中坡度与坡向的变化，从左至右坡度逐渐增大，而坡向由阴坡逐渐向半阴坡、半阳坡、阳坡转变；第一轴同时反映了群落受人为干扰情况；第二轴反映的群落与环境关系不太明显，但对角线较好地反映了植物群落与死地被层厚度的变化情况；37个优势种的DCA物种排序图第一轴从左至右,坡度逐渐增大，坡向由阴坡、半阴坡向半阳坡、阳坡转变，排序图从左下方到右上方反映出群落死地被层盖度逐渐减小。

关键词: 随机森林, 季风气候, 生物完整性指数(IBI), 自然梯度

Abstract: Based on the data from the field investigation of 42 quadrats with 37 dominant species, the structure, species composition and distribution of wild Castanea mollissima communities in Taikuan River Nature Reserve, Shanxi and the relationship of community and environment were investigated by TWINSPAN and DCA. The results showed that C. mollissima communities were divided into 11 associations by TWINSPAN, and the distribution of the communities could comprehensively reflect the influences of disturbance, slope direction and soil organic matter on the communities. The results by DCA ordination indicated that the important factors impacting the community distribution were slope direction, terrain and soil type. The first axis of DCA ordination mainly represented the influence of the slope and slope direction on the communities. The relationship between the community and the environment, mainly reflected by the second axis, was not obvious; however, the diagonal of DCA ordination reflected the variations of the communities and the thickness of forest floor. Moreover, the DCA ordination analysis showed that the 37 dominant species had similar patterns. To some extent, community type was dependant on the distribution pattern of dominant species.

Key words: natural gradients, random forest, integrity of biotic index (IBI), monsoonal climate

廉凯敏1,吴应建1,张丽2,赵璐璐3,张峰4**. 太宽河自然保护区板栗群落数量分类与排序[J]. 生态学杂志.

LIAN Kai-min1, WU Ying-jian1, ZHANG Li2, ZHAO Lu-lu3, ZHANG Feng4**. Numerical classification and ordination of wild Castanea mollissima communities in Taikuan River Nature Reserve, Shanxi.[J]. cje.

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