摘要
新疆河狸优先选择水深137 cm、岸高101 cm左右及沿岸河谷林丰盛的河段掘洞栖居;河谷林密度、水源及地形条件是决定其栖息地适度的主要因子。新疆河狸的家域平均为1.2km(沿河岸长),每个家域平均拥有洞巢22个,洞巢沿河岸呈集团分布,且主要集中于越冬洞(巢)附近。河狸家族的领域即为越冬洞(巢)周围的洞巢密集区,平均长480m。新疆河狸种群通过其领域性及繁殖力的抑制与否来调节种群密度,其最大环境容纳量约为每公里河段1个家族。河谷林密度是新疆河狸的种群限制因子。
Studies in the Burgen River Beaver Researve in 1989 stated that the beavers always selected places with depth of around 137cm of the water and height of around 101 cm of the bank with abundant trees to dig burrows and build lodges. Stand density, water and topographic conditions were the primary factors determining the fitness of a habitat. The average home range of a beaver colony was 1.2km along the river, containing 22 burrows and lodges which showed clumped distribution pattern and concentrated near the overwintering burrow (or lodge). It's concluded that the clumped trees is the main reason resulting in the clumped burrows and lodges. The area concentrated with burrows and lodges near the overwintering burrow is the territory of a beaver colony averaging 480 m along the river. The beaver's carrying capacity is about one colony per kilometer along the river. Stand density is the limiting factor of the beavers.
出处
《林业科学研究》
CSCD
北大核心
1992年第5期565-569,共5页
Forest Research
关键词
河狸
栖居
家域
洞巢
beaver (Castor fiber) habitat conditions home range burrow and lodge distribution pattern
