米槁群落主要物种资源利用特征分析

开展米槁群落物种生态位研究,可了解米槁群落物种对资源的利用特征,为米槁的保护与管理提供科学依据。基于贵州省米槁天然林群落的实际调查数据,通过生态位宽度、生态位重叠指数,分析该群落主要物种的资源利用特征。群落中米槁(Cinnamomum migao)、杜茎山(Maesa japonica)、菝葜(Smilax china)的生态位宽度最大,在群落中处于明显优势地位,具有较强竞争力和资源利用能力;生态位宽度越大的物种间生态位重叠越大,但在相同或相似环境条件下,生态位宽度值小的种对也会拥有较高的生态位重叠;米槁群落主要物种间的生态位重叠指数偏低,说明物种间对资源利用的相似性较低,物种的生态位分化明显,竞争不激烈,群落结构较为稳定,物种间能够较好地相互共存。

Resource Utilization Characteristics of Dominant Species in Cinnamomum migao Community

To illuminate the niche of Cinnamomum migao community,to understand the utilizationcharacteristics of the community for protecting and managing C.migao,the resource utilization characteristics ofthe main species in the community were analyzed,with the survey data of C.migao natural forest community inGuizhou Province. C.migao,Maesa japonica and Smilax china,with the largest niche breadths,dominated thecommunity with strong competitiveness and resource utilization ability;the greater the niche breadth was,thegreater the niche overlap was. Yet under the same or similar environmental conditions,the species pairs withsmaller niche breadth value could also have relatively high niche overlap. The low niche overlap index of mainspecies in C.migao community indicated that the similarity of resource utilization among species was low,theniche of species was clearly differentiated without fierce competition,the community structure was relativelystable,and the species could coexist well.