Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1002/ecs2.1596/full |
Caching rodents disproportionately disperse seed beneath invasive grass | |
Sommers, Pacifica1,2; Chesson, Peter1 | |
通讯作者 | Sommers, Pacifica |
来源期刊 | ECOSPHERE
![]() |
ISSN | 2150-8925 |
出版年 | 2016 |
卷号 | 7期号:12 |
英文摘要 | Seed dispersal by caching rodents is a context-dependent mutualism in many systems. Plants benefit when seed remaining in shallow caches germinates before being eaten, often gaining protection from beetles and a favorable microsite in the process. Caching in highly unfavorable microsites, conversely, could undermine the dispersal benefit for the plant. Plant invasions could disrupt dispersal benefits of seed caching by attracting rodents to the protection of a dense invasive canopy which inhibits the establishment of native seedlings beneath it. To determine whether rodents disproportionately cache seed under the dense canopy of an invasive grass in southeastern Arizona, we used nontoxic fluorescent powder and ultraviolet light to locate caches of seed offered to rodents in the field. We fitted a general habitat-use model, which showed that disproportionate use of plant cover by caching rodents (principally Chaetodipus spp.) increased with moonlight. Across all moon phases, when rodents cached under plants, they cached under the invasive grass disproportionately to its relative cover. A greenhouse experiment showed that proximity to the invasive grass reduced the growth and survival of seedlings of a common native tree (Parkinsonia microphylla) whose seeds are dispersed by caching rodents. Biased dispersal of native seed to the base of an invasive grass could magnify the competitive effect of this grass on native plants, further reducing their recruitment and magnifying the effect of the invasion. |
英文关键词 | cache Chaetodipus baileyi Chaetodipus intermedius Heteromyidae invasion mutualism disruption Neotoma albigula Parkinsonia microphylla Pennisetum ciliare predator avoidance seed dispersal Sonoran Desert |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000390136700025 |
WOS关键词 | HOARDING BEHAVIOR ; KANGAROO RATS ; PREDATION ; COMPETITION ; PREFERENCE ; ABUNDANCE ; SELECTION ; SAVANNA ; CLIMATE ; IMPACT |
WOS类目 | Ecology |
WOS研究方向 | Environmental Sciences & Ecology |
来源机构 | University of Arizona |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/192509 |
作者单位 | 1.Univ Arizona, Ecol & Evolutionary Biol, Tucson, AZ 85721 USA; 2.Univ Colorado, Ecol & Evolutionary Biol, Boulder, CO 80309 USA |
推荐引用方式 GB/T 7714 | Sommers, Pacifica,Chesson, Peter. Caching rodents disproportionately disperse seed beneath invasive grass[J]. University of Arizona,2016,7(12). |
APA | Sommers, Pacifica,&Chesson, Peter.(2016).Caching rodents disproportionately disperse seed beneath invasive grass.ECOSPHERE,7(12). |
MLA | Sommers, Pacifica,et al."Caching rodents disproportionately disperse seed beneath invasive grass".ECOSPHERE 7.12(2016). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。