高寒草甸生态系统艾虎种群能量动态的研究

动物种群能流的研究具有重要的意义。为阐明食肉动物与食草动物能量的相互关系,我们于1982年4—10月在青海省门源县海北高寒草甸生态系统定位站地区,测定了艾虎对食物的消化率和同化率,同时统计其密度,初步估计通过其种群的能量流。 艾虎全年平均摄入干物质为0.125克/克体重/日;摄入总能为0.709大卡/克体重/日,同化能、粪便和尿的排出能分别占其80.18％、14.58％和5.25％。全年摄入能为1.157×10~5大卡/公顷,通过种群能流为0.917×10~5大卡/公顷/年。 上述结果表明,通过艾虎种群的能量流是比较少的。因此,保护艾虎,增加其数量,是高寒草甸生态系统改造的任务之一。

ENERGY DYNAMICS OF THE POPULATION OF POLECAT IN THE ALPINE MEADOW ECOSYSTEM

This work was carried out at Haibei Research Station of Alpine Meadow Ecosystem, Menyuan County, Qinghai from April to October in 1982. The materials for study Were collected in three phenological periods of vegetation: green up, exuberance and withering. The results for polecat (Mustela eversmanni) are as follows:1. The daily food consumption (fresh wt) for polecat averages 0.404 g/g body wt. in the whole green up period, but 0.351 g/g body wt. in all three phenological periods. The daily food consumption ...