四川盆地丘陵区主要森林群落结构特征研究

Research on Characteristics of Community Structure of the Main Forests in Hilly Regions of the Sichuan Basin

本文对四川盆地丘陵区主要森林群落———人工柏木纯林、次生栎柏混交林和桤柏混交林的群落结构特征进行了研究。结果表明:在群落的物种组成、生活型、层片结构以及Shannon-Wiener多样性指数、Pielou均匀度指数和Simpson生态优势度指数表征的群落综合特征上,次生混交林与人工林具有很大差异。人工柏木纯林物种数量少,乔、灌、草层的物种多样性和均匀度较低,生态优势度较高;次生栎柏混交林和桤柏混交林物种数量较多,乔、灌、草层有较高的物种多样性和均匀度,较低的生态优势度。

Characterisitics of community structure of Cupressus funebris plantation, secondary mixed Quercus-Cupressus forest, and secondary mixed Alnus-Cupressus forest in hilly regions of the Sichuan basin were studied in this paper. The results showed that secondary mixed forests and plantation were distinctively differenet in species composition, life form and layers of communities, Shannon-Wiener diversity index, Pielou Evenness index and Ecological dominance. There were fewer plant species, lower species diversity, lower evenness index and higher ecological dominance in Cupressus funebris plantation, but there were more plant species, higher species diversity, higher evenness index and lower ecological dominance in secondary mixed Quercus-Cupressus forest and secondary mixed AlnusCupressus forest.