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1997年 10月～ 12月 ,对地处横断山怒山山脉南段的南延地区具代表性的 7种主要生态环境的蚤类进行了垂直分布调查和研究。共采获蚤类 5科 13属 2 8种 1557只。参考以往的有关资料 ,已知当地蚤类共有 17属 36种。在垂直分布调查研究所获 2 8种蚤类中 ,经分析认为古北种有 9种 ( 32 .14 % ) ,东洋种有 17种 ( 60 .71% )和广布 2种 ( 7.14 % )。通过对各主要生态环境内蚤类群落的结构、物种丰富度、物种多样性、均匀度和生态优势度测定和比较后 ,认为当地蚤类群落的稳定性是针阔叶混交林 >季风湿性常绿阔叶林 >常绿阔叶林 >苍山冷杉林 >亚高山灌丛草甸 >城市居民区及山坡耕作地。此外 ,对蚤类群落进行了系统聚类分析以及区系特点等问题的分析和讨论。根据调查结果与相关资料比较分析后 ,认为水湿条件是导致横断山区不同山系各地段或不同坡向古北与东洋区系分界线高度不同的重要因素 ,各山体地理位置 ,海拔高度的不同是形成两区系成分构成比例不同的原因之一。
From October to December 1997, the vertical distribution of fleas in seven representative ecological environments in the southern extension of the Wenshan Mountains in the Hengduan Mountains was investigated. A total of 1557 fleas were collected, belonging to 13 genera, 28 species, 5 families. Reference to the relevant information in the past, known to fleas a total of 17 genera and 36 species. Of the 28 species of fleas found in the vertical distribution survey, nine species (32.14%) were found in the ancient North Species, 17 species (60.71%) in the Oriental Ocean, and two species (7.14% . After the structure, species richness, species diversity, evenness and ecological dominance of fleas communities in all major ecological environment were measured and compared, the stability of fleas community was considered to be coniferous and broad-leaved mixed forest> monsoon wetness Green broadleaved forest> evergreen broadleaved forest> Abies> Cunninghamia lanceolata forest> subalpine shrub meadow> urban residential area and hillside farming area. In addition, the cluster analysis of fleas community and the characteristics of flora and other issues analysis and discussion. According to the survey results and comparative analysis of relevant data, it is considered that wet conditions are the important factors that lead to different heights of the demarcation line between the Gubei and the Toyo fauna of different mountains in the Hengduan Mountains, or in different slopes. The difference of the geographical position and altitude of the mountains is Formation of the composition of the two factions constitute a different proportion of one of the reasons.