长白山北坡访花食蚜蝇的种类与时空分布

Species and Seasonal and Spatial Distribution of Flower-Visiting Hoverfly in North Slope of Changbai Mountain

2004-2006年6～9月，对长白山北坡访花食蚜蝇种类与时空分布进行了系统的调查。采集到的访花食蚜蝇经鉴定共42种，隶属2亚科20属，其中23种为吉林省新记录种，隶属2亚科15属。分析了访花食蚜蝇在长白山北坡的垂直分布及季节分布规律，其中物种数的垂直分布为岳桦林带〉针阔混交林带〉人工植物花园〉针叶林带=苔原带，不随海拔升高而增加或递减；优势物种数随海拔升高先增后减，呈正态分布。季节分布表现为物种数在不同垂直带内高峰值出现的时期不同，8种优势访花食蚜蝇访问植物的种类随季节的变化大致呈正态分布。

The species and spatial and seasonal distribution of flower-visiting hoverfly were investigated in north slope of Changbai mountain from 2004 to 2006. The 42 species of flower-visiting hoverfly were classifted. They belong to 20 genera, 2 subfamihes, of which 23 species were newly recorded in Jilin province belonging to 15 genera, 2 subfamilies. Their vertical and seasonal distribution was analyzed. The vertical distribution of flower-visiting hoverfly species is Betu/a ermanii forest belt 〉 Coniferous-deeidous mixed forest belt 〉 Man-maade planting garden 〉 Coniferous forest belt = Alp tundra belt, that doesn＇ t relate with vertical height; while dominant species is normal distribution. The seasonal distributions are different between vertical belts of Changbai mountain, and high peak period is different. The plant species that eight dominant hoverfly species visited vary in different seasons.