云南临沧地区蚤类群落生态学与区系研究

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。

FAUNA AND COMMUNITY ECOLOGY OF FLEAS IN LINCANG REGION,YUNNAN PROVINCE

Lincang Region is situated in the southern edge of Henduan Mountains of Yunnan.An investigation on the fauna and community ecology of fleas in the region was carried out from October to December,1997,and 1557 specimens including 28 species were collected.Until now,36 species fleas belonged to 17 genera,5 families,had been found in the region together with those recorded previously.The vertical distribution of 28 species of fleas was investigated on Lincang region.Among them 9 species (32 14%) belong to Palaearctic region,17 species (60 71%) belong to Oriental region,and 2 species (7 14%) are wide spread species.The community structure,species diversity,evenness and ecological dominance indices of fleas communities in 7 main ecological environments were measured and compared.According to the investigation,the stability of fleas communities were coniferous and broadleaf mixed forest>wet evergreen broadleaf forest>evergreen broadleaf forest>fir forest>subalpine bush and grasslands>city proper>suburbs and cultivated area.In addition,the characteristics of flea fauna and clustered of fleas communities were also analysed and discussed. The authors consider that the heights of boundary lines between Palaearctic and Oriental region in different mountains and sope are not the same,which might be due to the different amount of rainfall in the mountains and slope,according to the results of our investigation and some related data.The different geographical position and altitudes in different mountains are considered to be the factors concerned with the different constituent ratios of the two faunae.