Hoarding behavior of rodents includes larder and scatter-hoarding.The latter which caches a lot of seeds under ground in a wide area may has an effect on seed dispersal.Rodents usually cache seeds between the seed res...Hoarding behavior of rodents includes larder and scatter-hoarding.The latter which caches a lot of seeds under ground in a wide area may has an effect on seed dispersal.Rodents usually cache seeds between the seed resource and home range.Seeds are transported only several tens of meters,with one or several seeds in one cache.Although rodents cache a lot of seeds,the post-dispersal predation rate is high and only a few of them remained.Micro-habitat of caches are often adapted to the germination of seeds.Trees with large seeds such as nuts and pine nuts are mainly dependent on the caching dispersal.Caching dispersal may help the seeds to escape heavy predation under mother tree,to colonize new place,and to arrive the habitat where they can germinate.展开更多
肾综合征出血热(Hemorrhagic fever with renal syndrome,HFRS)是一种全球性分布、由分节段的单股负链RNA病毒引起、主要由啮齿动物传播、临床上具有典型特征的传染病。上世纪70~80年代是我国HFRS流行最严重时期,通过采取以灭鼠防鼠为...肾综合征出血热(Hemorrhagic fever with renal syndrome,HFRS)是一种全球性分布、由分节段的单股负链RNA病毒引起、主要由啮齿动物传播、临床上具有典型特征的传染病。上世纪70~80年代是我国HFRS流行最严重时期,通过采取以灭鼠防鼠为主的综合防治措施,并且从20世纪90年代开始,采用自主研制生产的疫苗接种免疫,使我国HFRS疫情得到了控制。虽然近年来我国经济发展、城乡环境也发生巨大变化,但该病仍时有发生。鉴于HFRS危害性较大,本文简要描述本病的各方面特点,旨在预防本病发生。展开更多
文摘Hoarding behavior of rodents includes larder and scatter-hoarding.The latter which caches a lot of seeds under ground in a wide area may has an effect on seed dispersal.Rodents usually cache seeds between the seed resource and home range.Seeds are transported only several tens of meters,with one or several seeds in one cache.Although rodents cache a lot of seeds,the post-dispersal predation rate is high and only a few of them remained.Micro-habitat of caches are often adapted to the germination of seeds.Trees with large seeds such as nuts and pine nuts are mainly dependent on the caching dispersal.Caching dispersal may help the seeds to escape heavy predation under mother tree,to colonize new place,and to arrive the habitat where they can germinate.
文摘肾综合征出血热(Hemorrhagic fever with renal syndrome,HFRS)是一种全球性分布、由分节段的单股负链RNA病毒引起、主要由啮齿动物传播、临床上具有典型特征的传染病。上世纪70~80年代是我国HFRS流行最严重时期,通过采取以灭鼠防鼠为主的综合防治措施,并且从20世纪90年代开始,采用自主研制生产的疫苗接种免疫,使我国HFRS疫情得到了控制。虽然近年来我国经济发展、城乡环境也发生巨大变化,但该病仍时有发生。鉴于HFRS危害性较大,本文简要描述本病的各方面特点,旨在预防本病发生。
