摘要
采用样方法对不同资源位群落进行调查,利用生态位宽度、生态位相似性比例和生态位重叠公式研究了璧山县水土保持修复工程项目区内11个优势种群的生态位的变化.结果表明:漆树、白栎、马尾松、杉木的生态位宽度(Ba)较大,其生态位宽度(Ba)分别为0.574,0.464,0.439,0.306;而黄杞、川杨桐和小叶栲的生态位宽度较小,其Ba分别为0.027,0.104,0.111.生态位宽度大的树种间一般具有较高的生态位相似性比例,如漆树和白栎、漆树和马尾松、白栎和毛叶木姜子;目前,该区处于次生林退化过程中,生态位宽度较大(或者较小)的物种,它们构成的种对间的重叠值并不一致,可见生态位宽度与重叠程度并不完全是相关的,也表明植物对环境资源存在竞争和空间异质性.
Niche breadth,similarity and overlap of 11 dominant arbor populations in the area of the soil and water conservation and restoration project in Bishan County were studied with the quadrat sampling method.The results showed that Rhus verniciflua,Quercus fabr,Pinus massoniana and Cunninghamia lanceolata had large niche of breadth,with a breath value（Ba） of 0.574,0.464,0.439 and 0.306,respectively;and Adinandra bockiana,Engelhardia roxburghiana and Symplocos satchuenesiss had a small niche of breadth,their Ba being only 0.027,0.104 and 0.111 respectively.The niche similarity between species with broad niche breadth was generally greater,as was shown between R.verniciflua and Q.fabric,between R.verniciflua and P.massoniana,or between Q.fabric and L.mollis.At the present stage of degradation in secondary forests,there was no relationship between niche breadth and niche overlap of dominant species,which showed that there was competition among plants and spatial heterogeneity of environmental resources.
出处
《西南大学学报（自然科学版）》
CAS
CSCD
北大核心
2011年第7期103-108,共6页
Journal of Southwest University(Natural Science Edition)
基金
国家自然科学基金资助项目(40971166)
重庆市科技攻关重点资助项目(CSTC2009AB1115)
关键词
水土保持林
生态位宽度
生态位重叠
生态恢复
soil and water conservation forest
niche breadth
niche overlap
ecological restoration
