饲养场的鼠类群落结构、多样性及种群生态位

通过对广东省境内饲养场鼠类的调查，结果表明，饲养场的鼠种组成为５种，其群落结构为褐家鼠＞黄胸鼠＞小家鼠＞施氏屋顶鼠＞黄毛鼠。褐家鼠为优势种，黄毛鼠为稀有种。群落的多样性和均匀度受畜禽舍结构的空间异质性的影响，畜禽舍为金字砖瓦结构的群落多样性和均匀度显著高于其它结构的。种群生态位宽度以褐家鼠的最大，为０．９９１４，而以黄毛鼠和施氏屋顶鼠的最小，分别为０．０５５２和０。种群生态位重叠值以褐家鼠与黄胸鼠、褐家鼠与小家鼠、黄胸鼠与小家鼠之间的较高，其它的则较低。

Community Structure,Diversity and Population Niche of Rodents on Chicken and Pig Farms Qi Gunxian

This paper analyses the investigations of the rodents on the chicken and pig farms in Guangdong Province.The results showed that the rodents on the farms consisted of 5 species and the community structures were Rattus norvegicus>R.flavipectus>Mus musculas>R.rattus>R.ratttoides.R.norvegicuswas the dorminant species R.rattoideswas the rare species on the farms.The community diversity and evenness were influanced by the spatial heterogeneity of the farm house structures The community diversity and eveeness in the brick and tile structure of farm huses in a triangle shape were remarkedly higher than those in other structures.The width of population hiche ofR.norvegicus was the largest(i.e.0 991 4),but those of R.flavipectus and R.rattus were the smallest(i.e.0 055 2 and 0,respectively).The overlap valuse of population niche were higher between R.norvegicus and R.flavipectus,between R.norvegicus and M.musculas,and between R.flavipectus and M.musculas,but the others were lower.