韩国森林中枯死木及地被物对小型鼠类丰富度的影响(英文)

在南韩东北部,1997-1998年间,自4月至12月对人工林和无枯死木生境及采伐后保留地被物的落叶次生林中的小型鼠类种群特征进行了调查。在两块林地中各选择1 hm2(100m100m)样地作为控制区和处理区。两块研究地的中上层林冠结构基本相似,但倒木及地被物的数量及比例却显示控制区大于处理区。两区域中共捕到两种小型鼠类,其中棕背 (Eothenomys regulus)211只,占总数的55.5%,大林姬鼠(Apodemus peninsulae)169只,占44.5%。这两种鼠类的丰富度及种群稳定性在控制区明显优于处理区。两地小型鼠类的不同捕获量主要来自两地鼠类繁殖率和居留率的不同。显然,森林地被结构对小型鼠类的生存具有重要意义。因此,采伐迹地中保留枯死木及地被物是维持小型鼠类种群所必须的。

The effect of dead wood and understory coverage on small rodent abundance in Korean forest

This study was conducted to investigate the population characteristics of small rodents in different habitats with the artificial presence and absence of dead wood, and understory vegetation after forest cutting at natural deciduous forest in north-eastern South Korea from April to December in 1997 and 1998. Two forests, one hectare each (100 100 m), were se-lected and designated as the control and the treatment area. Forest structure of mid and high canopy layers in both study areas was similar. But number and volume of fallen trees, and coverage of understory vegetation were higher in the control area than in the treatment area. Total captures of small rodents in two areas combined comprised Eothenomys regulus (55.5%, n = 211) and Apodemus peninsulae (44.5%, n = 169). Total abundance of E. regulus and A. peninsulae, and population stability were sig-nificantly greater in the control area than in the treatment area. The difference in the captured number of two small rodents be-tween the two sites was caused by the difference in reproduction and residency. The structure of forest floor appears to be im-portant to small rodents. The presence of dead wood and understory vegetation after the forest cutting would be necessary for the maintenance of small rodent population in the forest cutting areas.