摘要
对不同防治对策下施用氯敌鼠作为杀鼠剂对农田小哺乳动物群落结构的影响进行了研究．结果表明，杀鼠剂对群落组成有很大影响，灭鼠时机、灭鼠次数不同，群落的反应也不同．秋季灭鼠，小哺乳动物数量逐年下降，３ 年后可达到较低密度．群落多样性也逐年下跌，且回升极弱．春季灭鼠，数量可持续在低水平，群落多样性较其它处理高，对化学灭鼠破坏的生物多样性有较强的恢复力．灭鼠频次的增加对小哺乳动物总体数量降低有强化作用．可以认为，化学灭鼠明显地降低了群落中小哺乳动物的密度，也降低了群落的多样性．促使小哺乳动物群落向着优势种突出、种类单调、群落稳定性差的方向演替．
The result shows that rodenticide significantly affected the structure of the mammal community, and the effect differed with rat killing time and frequency.When rat killing in autumn,the small mammal density declined year by year,and reached a low level after three years, with a decrease of community diversity and a weak recovery. When rat killing in spring,the density could be kept at a low level,however,the diversity was higher than other treatments,with a strongcapacity of restoring the biodiversity. Increasing the frequency of rodenticide application intensified the effect on decreasing the density of small mammals. Therefore, chemical rat controlling obviously decreased the density of small mammals and the diversity of the community, and promoted the community succession with more prominent dominant species, monotonous community composition and unstable structure direction.
出处
《应用生态学报》
CAS
CSCD
1999年第6期717-720,共4页
Chinese Journal of Applied Ecology
基金
国家"九五"科技攻关项目
四川省教委重点赞助项目
关键词
杀鼠剂
氯敌鼠
农田小哺乳动物
群落
多样性
演替
Rodenticide, Chlorophacinone, Small mammal in farmland, Community, Diversity, Succession.
