金城山植物群落优势种群的种间关系  

Interspecific Relations of the Dominant Plant Populations at Mt. Jincheng, Sichuan, China

作　　者：孙澜[1,2] 苏智先[3] 严贤春[1] 张素兰[3] 

机构地区：[1]西华师范大学四川省环境科学与生物多样性保护重点实验室 [2]绵阳师范学院四川省生态学与环境保护技术重点实验室四川绵阳621000 [3]绵阳师范学院四川省生态学与环境保护技术重点实验室

出　　处：《应用与环境生物学报》2008年第3期314-318,共5页Chinese Journal of Applied and Environmental Biology

基　　金：国家自然科学基金资助项目(No.30670209);四川省教育厅资助项目(2006A113);四川省科技厅资助项目(05JY029-107);四川省重点学科建设资助项目(SZD0420)~~

摘　　要：采用2×2列联表的χ2检验、Ochiai关联度指数、Pearson相关系数和Spearman秩相关系数检验,研究了南充金城山植被24个优势种群共276个种对的种间关联(或相关).结果表明:1)χ2检验有15个种对呈正相关,3个种对呈负相关,正负关联比为5.0,其余258种对联结程度不显著;Pearson相关系数检验23个种对正相关,1个种对呈负相关,正负关联比为23.0,其余252种对联结程度不显著;Spearman秩相关系数检验24个种对呈正相关,5个种对呈负相关,正负关联比为4.8,其余247种对联结程度不显著;2)χ2检验只能反映出种对间联结性显著与否,经χ2检验不显著的种对并不意味着其间没有联结性,故只有与Ochiai关联度指数结合,结论才比较合理;3)与Pearson相关系数检验相比,Spearman相关系数检验具有较高的灵敏度;4)按照对环境的适应方式和主导生态因素,24个优势种可划分为4个生态种组,同一生态种组内,各种间具有较强的正联结,表明其资源利用方式和生态要求相似,而不同组间联结较为松散,主要是由于它们具有不同的生物学特性,对生境具有不同的生态适应性和相互分离的生态位所致.桤木、千筋树、插田泡、乌蔹莓和小叶菝葜等呈独立分布.Methods ofx2-test for 2 × 2 contingency table, Pearson correlation coefficient test and Spearman rank correlation co- efficient test were used to study the interspecific correlations among 276 species pairs of 24 dominant plant populations at Mt. Jincheng. The result showed that 15, 23 and 24 species pairs were positively correlated, while 3, 1 and 5 species pairs had negative correlations, and the ratios of positive and negative correlations were 5.0, 23.0 and 4.8. The proper conclusion of this study depended upon the proper combination of the x2-test with Ochiai association index. Compared with Pearson correlation coefficient test, Spearman rank correlation coefficient test was more sensitive. According to the adaptability to the environ- ment and the relationships between plants and environment, 24 species were divided into four ecological species groups and the different species in the same ecological species groups showed a positive association and correlation, which indicated that they had similar resource-utilizing ways and ecological requirements, while the negative association and correlation occurred among the species had different biological features, e. g. , different adaptabilities to habits or segregated niches in some degree. Those species including Alnus cremastogyne , Carpinus funebris , Rubrs coreanus , Caytatia japonica and Smilax mucrophylla were found independently distributing.

关 键 词：金城山 植物群落 优势种群 种间关联 

分 类 号：Q948[生物学—植物学]