学术
摘 要:
本文研究了四川盆地丘陵区绵阳官司河流域9种森林群落的物种组成、生活型、层片结构以及Shannon-Wiener多样性指数、Pielou均匀度指数和Simpson生态优势度指教表征的群落综合特征。群落内共有维管植物67科125属146种，比10年前增加了12科43属58种。群落的高度为10m～14m，可分为乔木、灌木和草本层3个层次，构成乔木层的主要树种是马尾松、柏木、栓皮栎、化香和桤木等。群落的季相变化主要是由松、柏常绿针叶树和落叶栎类决定，群落内植物的生活型、叶型特征表现为以小型叶、单叶、草质叶占优势。群落的多样性指数为0.53～3．30、均匀度指数为0.48～0．89、生态优势度0．06～0．71。[著者文摘]
文章出处:
《四川林业科技》-2006年27卷6期 -41-46页
栏目信息:
分 类 号:
文献标识码:
A
文章编号:
1003-5508（2006）06-0041-06
A Study of Characteristics of Community Structure of the Main Forests in the Guansi River Valley of Mianyang City
LUO Zong-shi, XIANG Cheng-hua ,CHEN Jun-hua ,Xie Da-jun （Sichuan Academy of Forestry, Sichuan Province,Chengdu 610081 ,China）
Abstract:
In this paper researches are made on the characteristics of community structure, such as species composition,llfe-form, layers of communities, Shannon-Wiener diversity index, Pielou evenness index and ecological dominance, of nine forests in the Guansi River valley of Mianyang City. As for vascular plants, there are 67 families, 125 genera and 146 species in the plots, with the increase of 12 families, 43 genera and 58 species in the communities as compared with 10 years ago. The height of the communities is from 9 to 12 meters,and they can be divided into tree layer,shrub layer and herb layer. Pinus rnassoniana, Cupressus funebris, Quercus variabilis, Platycarya strobilacea and Alnus cremastogyne etc. are made of dominance tree species in the tree layer of forests,by which the change of aspect is determined. Life form and foliaged characters of plant species in the communities are dominated hy microphyll, single leaf and herbaceous leaf. The Shannon-Weiner index of diversity, evenness index, ecological dominance of the communities are 0.53 - 3.30,0.48 - 0.89 and 0.06-0.71, respectively.[著者文摘]
Key words:
Guansi River Valley, Community Structure, Synthetical Characteristic, Species Diversity, Protection Forest
基金资助:
“长江上游四川盆地中低山丘陵区（阆中）水土保持型植被建议技术研究与示范（2001BA51080105）”和“四川林业重点工程效益监测及评价技术研究（研究04-13）”. 致谢：2005级硕士研究生栾军伟、罗红梅和新桥站工作人员参加了野外调查.
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