南岳衡山春夏季叶蜂多样性研究

2004年3～8月,在南岳沿海拔梯度设置3块样地,进行叶蜂取样调查。共采获叶蜂2 125头,隶属3科36属66种。研究表明:(1)春季黑腹近脉叶蜂、台湾钩瓣叶蜂为2种为优势种;夏季台湾钩瓣叶蜂、列斑黄腹三节叶蜂、日本黄腹三节叶蜂、白尾暗腹三节叶蜂和杜鹃黑毛三节叶蜂等5种为优势种。(2)低海拔红头钩瓣叶蜂为优势种,中海拔台湾钩瓣叶蜂为优势种,高海拔红环元叶蜂和黑腹近脉叶蜂为优势种。(3)各月份间叶蜂群落个体数量的排序为:4月>5月>3月>6月=7月>8月;Shannon-Wiener指数变化趋势为3月>6月>7月>5月>4月>8月。(4)各海拔间叶蜂群落个体数量和Shannon-Wiener指数排序均为:高海拔>中海拔>低海拔。

Tenthredinoidea Diversity in the Spring and Summer in the Mountain Hengshan, Hunan

To investigate the sawfly diversity on Mountain.Hengshan of Hunan from March 2004 to August 2004,three sampling sites along the elevational gradient,i.e.Yubanqiao,Banshanting and Cangjingdian were selected.A total of 2 125 sawfly individuals,66 species belonging to 36 genera of 3 families were collected.The results were as follows:(1) Dominant species were Phymatoceropsis melanogaster and Macrophya formosana in the Spring,and were P.melanogaster,Arge xanthogaster,A.nipponesis,A.albocaudalica and A.similes in the Summer.(2) Dominant species at low elevation was M.erythrocephalica,at middle elevation M.formosana,and at high elevation Taxonus annulicornis and P.melanogaster.(3) Individuals of sawfly community in different months ranked in the following order: April>May>March>June=July>August.The Shannon-Wiener indices arranged as follows: March>June>July>May>April>August.(4) Individuals,margalef indices and Shannon-Wiener indices of sawfly commu-nity at different elevations ranked as follows: high altitude>middle altitude>low altitude.