关帝山森林植被优势种群生态位  

Niche characteristics of dominant species in forest vegetation in Guandi Mountain,Shanxi of China

作　　者：毛空 张殷波[1] 张峰[1,2] 

机构地区：[1]山西大学黄土高原研究所,太原030006 [2]山西大学生命科学学院,太原030006

出　　处：《生态学杂志》2013年第11期2920-2925,共6页Chinese Journal of Ecology

基　　金：山西省回国留学人员科研项目(20100012);山西省自然科学基金项目(2011011031-1;2013011037-1);科技部科技基础性工作专项(2011FY110300)资助

摘　　要：在野外调查的基础上,应用Shannon生态位宽度指数和Pianka生态位重叠指数,对关帝山庞泉沟国家级自然保护区森林植被中26个主要优势种(包括6种乔木、6种灌木和14种草本植物)的生态位特征进行定量分析。结果表明:(1)乔木层白桦具有最大的生态位宽度,灌木层土庄绣线菊生态位最宽,草本层披针叶苔草在所有26个优势种中生态位宽度最大,说明它具有较好的环境适应性,在竞争中占有优势地位;(2)物种生态位宽度与其在样方中的频数呈极显著正相关(P<0.01);(3)26个优势种的生态位普遍产生重叠,但重叠程度均较小,表明种间竞争并不激烈;(4)生态位重叠与生态位宽度之间的关系并不是绝对的正相关(P>0.05)。Based on the field survey, and by using Shannon index and Pianka index, a quantita tive analysis was made on the niche characteristics of 26 dominant species, including 6 tree spe cies, 6 shrub species, and 14 herb species, in the forest vegetation in Pangquangou National Nature Reserve in the middle of Ltiliang Mountains, west of Shanxi. In the tree layer, Betula platyphylla had the widest niche breadth; in the shrub layer, the niche breadth of Spiraea pu- bescens was the widest. Among the 26 dominant species, Carex lanceolata in herb layer had the widest niche breadth, suggesting its strong adaptability to environment factors and the advantages in competition with the other species. There was a significant positive correlation between the species niche breadth and the species frequency （ P〈0.01 ）. The niche overlapping among the 26 dominant species occurred generally, but the overlapping degree was lower, suggesting the less strong competition between species. The correlation between the niche overlapping and niche breadth was not positively significant （P〉0.05）.

关 键 词：关帝山 森林植被 优势种 生态位宽度 生态位重叠 

分 类 号：Q948.1[生物学—植物学]