唐家河自然保护区小型兽类生物量的初步研究

Biomass of small mammals in Tangjiahe Nature Reserve.

1989年4～11月在四川省唐家河自然保护区,用去除取样法对该保护区内小型兽类群落的物种密度和生物量进行研究.共安置11 000多铗日,捕获小型兽类846只,隶属21种.采用回归方法计算出唐家河自然保护区4个不同小型兽类群落夏季物种的密度,分别为18.85、23.01、15.99和25.38只·hm-2;平均密度为19.49只·hm-2.夏季生物量分别为1 053.9、1 497.13、1 051.99和1 815.15 g·hm-2,平均生物量为1 273.04 g·hm-2.在唐家河自然保护区小型兽类群落中,主要优势种社鼠的生物量在群落C1、C2、C3分别达到91%、90%、79%,另一优势种藏鼠兔的生物量则占群落4总生物量的79%.它们决定了唐家河自然保护区小型兽类群落的主要特征.

From April to November 1989,small mammal communities were studied in Tangjiahe Nature Reserve,Sichuan Province,China.846 individuals were captured within 11 000 trap-days including 21 small mammal species recorded in the surveyed area.Based on the small mammal number captured,regression equations were established to calculate the small mammal densities and biomass of the four small mammal communities in Tangjiahe Nature Reserve.The results showed that the species densities of the four small mammal communities were 18.85,23.01,15.99,25.38 individual·hm -2 respectively in summer with the average of 19.49 individual·hm -2.The biomass of the four mammal communities in summer were 1 053.9,1 497.13,1 051.99,1 815.15 g·hm -2 respectively,with the average of 1 273.04 g·hm -2.The dominant species of Niviventer niniventer reached 91%,90%,and 79% of total biomass in community 1,2 and 3 respectively.The other dominant species Ochatena thibetana reached 79% of total biomass in community 4.These species determined the main characteristics of the small mammal communities in Tangjiahe Nature Reserve.