干旱区生态环境知识资源中心(Arid): Size dependency of patch departure behavior: evidence from granivorous rodents

Arid

DOI	10.1002/ecy.2800
	Size dependency of patch departure behavior: evidence from granivorous rodents
	Cozzoli, Francesco; Gjoni, Vojsava; Basset, Alberto
通讯作者	Cozzoli, Francesco
来源期刊	ECOLOGY
ISSN	0012-9658
EISSN	1939-9170
出版年	2019
卷号	100 期号:10
英文摘要	Individual size is a major determinant of mobile organisms' ecology and behavior. This study aims to explore whether allometric scaling principles can provide an underlying framework for general patterns of resource patch use. To this end, we used giving-up densities (GUDs), that is, the amount of resources remaining in a patch after a forager has quit feeding, as a comparative measure of the amount of resources exploited by a forager of any given size. We specifically tested the hypothesis that size-dependent responses to both internal (energy requirement) and external (risk management) forces may have an effect on GUDs. We addressed this topic by conducting an extensive meta-analysis of published data on granivorous rodents, including 292 GUD measurements reported in 25 papers. The data set includes data on 22 granivorous rodent species belonging to three taxonomic suborders (Castorimorpha, Myomorpha, and Sciuromorpha) and spans three habitat types (desert, grassland, and forest). The observations refer to both patches subject to predation risk and safe patches. Pooling all data, we observed positive allometric scaling of GUDs with average forager size (scaling exponent = 0.45), which explained 15% of overall variance in individual GUDs. Perceived predation risk during foraging led to an increase in GUDs independently of forager size and taxonomy and of habitat type, which explained an additional 12% of overall GUD variance. The size scaling exponent of GUDs is positive across habitat types and taxonomic suborders of rodents. Some variation was observed, however. The scaling coefficients in grassland and forest habitat types were significantly higher than in the desert habitat type. In addition, Sciuromorpha and Myomorpha exhibited a more pronounced size scaling of GUDs than Castorimorpha. This suggests that different adaptive behaviors may be used in different contexts and/or from different foragers. With body size being a fundamental ecological descriptor, research into size scaling of GUDs may help to place patch-use observations in a broader allometric framework.
英文关键词	foraging theory giving up density body size predation allometry rodents
类型	Article
语种	英语
国家	Italy
开放获取类型	Green Published, hybrid
收录类别	SCI-E
WOS记录号	WOS:000480352700001
WOS关键词	GIVING-UP DENSITIES ; BODY-SIZE ; PREDATION RISK ; FORAGING BEHAVIOR ; COMMUNITY STRUCTURE ; HABITAT SELECTION ; FOOD SELECTION ; KANGAROO RATS ; SCALING LAWS ; COEXISTENCE
WOS类目	Ecology
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215238
作者单位	Univ Salerno, Dept Biol & Environm Sci & Technol, I-73100 Lecce, Italy
推荐引用方式 GB/T 7714	Cozzoli, Francesco,Gjoni, Vojsava,Basset, Alberto. Size dependency of patch departure behavior: evidence from granivorous rodents[J],2019,100(10).
APA	Cozzoli, Francesco,Gjoni, Vojsava,&Basset, Alberto.(2019).Size dependency of patch departure behavior: evidence from granivorous rodents.ECOLOGY,100(10).
MLA	Cozzoli, Francesco,et al."Size dependency of patch departure behavior: evidence from granivorous rodents".ECOLOGY 100.10(2019).