西双版纳聚果榕榕果小蜂种间联结性研究

应用方差比率法、2× 2列联表的 χ2 检验、联结系数、点相关系数、共同出现百分率、Pearson相关系数和秩相关系数等多指数比较的方法研究了西双版纳聚果榕榕果小蜂的种间联结性。研究表明 ,西双版纳聚果榕榕果小蜂种间总体联结性表现为极显著。 2× 2列联表的 χ2检验不能反映所研究昆虫种间联结性的真实情况。 6个聚果榕榕果小蜂种间共同出现率普遍较高。小蜂种间的联结程度多属极显著 (对于联结系数 15个种对中有 10个 ,对于秩相关系数15个种对中有 12个 )。传粉者Ceratosolenfusciceps同其它小蜂间的联结显著性最高 ,其中与Platyneuratestacea和P .mayri呈极显著负联结 ,与P .agraensis呈极显著正联结 ,但与Apoc rypta属 2小蜂的关系尚不十分明晰。Platyneura属 3种小蜂彼此之间呈极显著或显著的负联结关系 ,而Apocrypta属内 2个种之间呈极显著正联结。文章对该 6种榕果小蜂种间连接关系形成的原因及进化生态学后果作了较详尽的讨论。

Species associations of fig wasps associated with Ficus racemosa in Xishuangbanna

Comparisons among different calculation methods were conducted in order to analyze the species associations of fig wasps associated with Ficus racemosa in Xishuangbanna,SW China.The results indicated that interspecific associations were highly significant( P <0.01).Pollinator( Ceratosolen fusciceps )had the highest significant associations with other species, negatively with Platyneura testacea and P.mayri ,while positive with P.agraensis .There were highly significant negative associations among 3 species within genus Platyneura ,whereas,a highly significant positive association occurred between the 2 species of genus Apocrypta .The interspecific association relationship was not clear yet for pollinator and Apocrypta species.Semi matrices diagrams and constellation diagrams were applied to show species associations of fig wasps.The causes and evolutionary effects of species association status of 6 fig wasp species were also discussed.