Arid
DOI10.1016/j.actao.2011.03.004
Effects of rodent species, seed species, and predator cues on seed fate
Sivy, Kelly J.1; Ostoja, Steven M.2; Schupp, Eugene W.1,3; Durham, Susan3
通讯作者Sivy, Kelly J.
来源期刊ACTA OECOLOGICA-INTERNATIONAL JOURNAL OF ECOLOGY
ISSN1146-609X
EISSN1873-6238
出版年2011
卷号37期号:4页码:321-328
英文摘要

Seed selection, removal and subsequent management by granivorous animals is thought to be a complex interaction of factors including qualities of the seeds themselves (e.g., seed size, nutritional quality) and features of the local habitat (e.g. perceived predator risk). At the same time, differential seed selection and dispersal is thought to have profound effects on seed fate and potentially vegetation dynamics. In a feeding arena, we tested whether rodent species, seed species, and indirect and direct predation cues influence seed selection and handling behaviors (e.g., scatter hoarding versus larder hoarding) of two heteromyid rodents, Ord’s kangaroo rat (Dipodomys ordii) and the Great Basin pocket mouse (Perognathus parvus). The indirect cue was shrub cover, a feature of the environment. Direct cues, presented individually, were (1) control, (2) coyote (Canis latrans) vocalization, (3) coyote scent, (4) red fox (Vulpes vulpes) scent, or (5) short-eared owl (Asio flammeus) vocalization. We offered seeds of three sizes: two native grasses, Indian ricegrass (Achnatherum hymenoides) and bluebunch wheatgrass (Pseudoroegneria spicata), and the non-native cereal rye (Secale cereale), each in separate trays. Kangaroo rats preferentially harvested Indian ricegrass while pocket mice predominately harvested Indian ricegrass and cereal rye. Pocket mice were more likely to scatter hoard preferred seeds, whereas kangaroo rats mostly consumed and/or larder hoarded preferred seeds. No predator cue significantly affected seed preferences. However, both species altered seed handling behavior in response to direct predation cues by leaving more seeds available in the seed pool, though they responded to different predator cues. If these results translate to natural dynamics on the landscape, the two rodents are expected to have different impacts on seed survival and plant recruitment via their different seed selection and seed handling behaviors. (C) 2011 Elsevier Masson SAS. All rights reserved.


英文关键词Great basin desert Desert rodents Granivory Predator cues Seed fate Seed removal
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000292356700004
WOS关键词RISK ALLOCATION HYPOTHESIS ; HETEROMYID RODENTS ; FORAGING BEHAVIOR ; DESERT RODENTS ; ORYZOPSIS-HYMENOIDES ; COMMUNITY STRUCTURE ; DIPODOMYS-MERRIAMI ; OWL PREDATION ; MICROHABITAT ; COMPETITION
WOS类目Ecology
WOS研究方向Environmental Sciences & Ecology
来源机构United States Geological Survey
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/166747
作者单位1.Utah State Univ, Dept Wildland Resources, Logan, UT 84322 USA;
2.US Geol Survey, Western Ecol Res Ctr, Yosemite Field Stn, El Portal, CA 95318 USA;
3.Utah State Univ, Ctr Ecol, Logan, UT 84322 USA
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GB/T 7714
Sivy, Kelly J.,Ostoja, Steven M.,Schupp, Eugene W.,et al. Effects of rodent species, seed species, and predator cues on seed fate[J]. United States Geological Survey,2011,37(4):321-328.
APA Sivy, Kelly J.,Ostoja, Steven M.,Schupp, Eugene W.,&Durham, Susan.(2011).Effects of rodent species, seed species, and predator cues on seed fate.ACTA OECOLOGICA-INTERNATIONAL JOURNAL OF ECOLOGY,37(4),321-328.
MLA Sivy, Kelly J.,et al."Effects of rodent species, seed species, and predator cues on seed fate".ACTA OECOLOGICA-INTERNATIONAL JOURNAL OF ECOLOGY 37.4(2011):321-328.
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