干旱区生态环境知识资源中心(Arid): Caching propensities and effectiveness of five coexisting heteromyid rodent species as dispersers of Indian ricegrass (Achnatherum hymenoides) seeds

Arid

DOI	10.3398/064.079.0406
	Caching propensities and effectiveness of five coexisting heteromyid rodent species as dispersers of Indian ricegrass (Achnatherum hymenoides) seeds
	Longland, William S.1; Vander Wall, Stephen B.2
通讯作者	Longland, William S.
来源期刊	WESTERN NORTH AMERICAN NATURALIST
ISSN	1527-0904
EISSN	1944-8341
出版年	2020
卷号	79 期号:4 页码:523-533
英文摘要	Recruitment of Indian ricegrass (Achnatherum hymenoides) seedlings occurs primarily from surface seed caches made by scatter-hoarding desert rodents of the family Heteromyidae. We used radiolabeled Indian ricegrass seeds in field seed-caching experiments with 5 coexisting heteromyid species (Dipodomys deserri, D. merriami, D. microps, Microdipodops pallidus, and Perognathus longimembris) to compare their potential effectiveness as dispersers. Dipodomys microps individuals deposited seeds almost exclusively in larders rather than in scatter hoards, implying that this species is unlikely to be an important seed disperser. Among the other species, individual caches made by larger species had more seeds than those made by smaller species, but smaller species made more caches. At the level of individual animals, M. pallidus was the most effective disperser in a quantitative sense; they made more caches than other species tested and placed fewer excess seeds in caches relative to optimal cache sizes for Indian ricegrass seedling establishment. However, because D. merriami individuals were considerably more abundant at the study site than other species and were also avid scatter hoarders, D. merriarni is likely to be the most quantitatively effective disperser of Indian ricegrass seeds at the species level. Ranking species according to qualitative effectiveness (e.g., by considering effects such as the caching microsite on seedling establishment) was more ambiguous. For example, P longimembris made relatively shallow caches that most closely match optimal planting depths for Indian ricegrass seedling emergence, but such shallow caches are probably more likely than deeper caches to be discovered by foraging rodents before they can germinate. With the possible exception of D. microns, any of the species we tested may be effective dispersers of Indian ricegrass seeds.
类型	Article
语种	英语
国家	USA
收录类别	SCI-E
WOS记录号	WOS:000508134300006
WOS关键词	ORYZOPSIS-HYMENOIDES ; DESERT RODENTS ; KANGAROO RATS ; SURVIVAL
WOS类目	Biodiversity Conservation ; Ecology
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
EI主题词	2020-01-01
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/312148
作者单位	1.ARS, USDA, Great Basin Rangelands Res Unit, Reno, NV 89512 USA; 2.Univ Nevada, Dept Biol, Reno, NV 89557 USA
推荐引用方式 GB/T 7714	Longland, William S.,Vander Wall, Stephen B.. Caching propensities and effectiveness of five coexisting heteromyid rodent species as dispersers of Indian ricegrass (Achnatherum hymenoides) seeds[J],2020,79(4):523-533.
APA	Longland, William S.,&Vander Wall, Stephen B..(2020).Caching propensities and effectiveness of five coexisting heteromyid rodent species as dispersers of Indian ricegrass (Achnatherum hymenoides) seeds.WESTERN NORTH AMERICAN NATURALIST,79(4),523-533.
MLA	Longland, William S.,et al."Caching propensities and effectiveness of five coexisting heteromyid rodent species as dispersers of Indian ricegrass (Achnatherum hymenoides) seeds".WESTERN NORTH AMERICAN NATURALIST 79.4(2020):523-533.