权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Effects of habitat selection of wood mice on the diversity of canopy tree species in mixed forests.

木鼠生境选择对混交林冠层树种多样性的影响

基本信息

批准号：
13660143
负责人：
MIGUCHI Hideo
金额：
$ 1.6万
依托单位：
Niigata University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2003
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13660143/
关键词：
Mixed forest Wood mice Seed predation Seedling predation Seed dispersal Forest floor vegetation Canopy structure Forest regeneration process 混交林更新メカニズム

项目摘要

Aim of this study is to clarify the effects of the habitat selection of wood mice, tree seed and seedling predator, on the species diversity of canopy trees in mixed forests. Three working hypothesizes were inspected.1:In the mixed forest, because of heterogeneity of light intensity on the forest floor, which determined by the canopy structure and tree species, herbaceous vegetation coverage of under growth was changed by the openness of canopy layer and constructs the habitats of wood mice that comprise the various patches2:Wood mice(Apodemus speciosus and A. argenteus) habitat selection was changed seasonally, but selects the dense herbaceous patch both in mature beech (Fagus crenata) forests and a sugi (Cryptomeria japonica) plantation.3:As wood mice activity of the open site was low than that of the close site, wood mice seed predation presser was changed depend on the crown structure not on the seed density.Mixed forests had variety of species composition and stand structure. Wood mice species composition, population density and activity were changed by the stand structure, especially by the herbaceous structure. From the these results, it will be possible to change the forest regeneration process through the control the presser of seed and seedling predation by wood mice to intensive management for herbaceous vegetation structure. And in consequence intensive management of canopy layer may result in the bio-diversity management in forested ecosystems.

摘要本研究旨在探讨木鼠、种子和幼苗捕食者的生境选择对混交林冠层乔木物种多样性的影响。检验了三个可行的假设。(1)在混交林中，由于林下光照强度的异质性（由林冠结构和树种决定），林下草本植被覆盖度被林冠层的开放所改变，并构建了由各斑块组成的木鼠栖息地。(2)木鼠（Apodemus speciosus和A. argenteus）生境选择发生季节性变化；但在成熟山毛榉（Fagus crenata）林和杉木（Cryptomeria japonica）人工林中都选择茂密的草本斑块。3：由于开放场地的木鼠活动低于封闭场地，因此木鼠对种子的捕食压力取决于树冠结构而不是种子密度。混交林具有多种树种组成和林分结构。林分结构对木鼠种类组成、种群密度和活动有明显的影响，尤其是草本结构。从这些结果来看，通过控制木鼠对种子和幼苗的捕食压力，对草本植被结构进行集约化管理，将有可能改变森林的更新过程。因此，林冠层的集约化管理可能导致森林生态系统生物多样性的管理。