浙江省红楠生境地群落数量分类和环境解析

为探讨群落结构与环境因子对红楠Machilus thunbergii在浙江省分布及发展的影响,采用双向指示种分类(TWINSPAN)、典范对应分析(CCA)并结合种间联结分析,对浙江省172个红楠生境地群落进行数量分类排序与环境解析。结果表明:(1)TWINSPAN将172个样地群落分成8个群落类型,红楠在群落中为优势种或主要伴生种。群落类型的不同是影响红楠生长及更新的重要原因。(2)海拔高度及坡度是决定红楠分布及发展的主导环境因子。红楠作为优势种的生境地主要特征为海拔900m以下、坡度35°以下。(3)甜槠(Castanopsis eyrei)、青冈(Cyclobalanopsis glauca)、木荷(Schima superba)为群落中的稳定优势种,种间联结结果显示与红楠均为显著正关联。

Community quantitative classification and environmental analysis of the Machilus thunbergii habitat in Zhejiang Province

In order to explore the influence of community structure and environmental factors on the distribution and development of Machilus thunbergii in Zhejiang Province, 172 Machilus thunbergii communities were classified and ranked quantitatively and their environment was analyzed by using TWINSPAN, Canonical Correspondence Analysis (CCA), and interspecific association analysis. The results showed that: (1) 172 sample plots were divided into 8 community types based on the TWINSPAN. Machilus thunbergii was the dominant species or the main companion species in the community. The difference of community types was an important reason affecting the growing and regeneration of Machilus thunbergii. (2) Altitude and slope were the dominant environmental factors that determined the distribution and development of Machilus thunbergii. As a dominant species, Machilus thunbergii was mainly characterized by altitude below 900 m and slope below 35°. (3) Castanopsis eyrei, Cyclobalanopsis glauca and Schima superba were the stable dominant species in the community, and the interspecific association results showed significant positive correlation with Machilus thunbergii.