Variation in Elevation and Sward Height Facilitate Coexistence of Goose Species through Allometric Responses in Wetlands

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	Variation in Elevation and Sward Height Facilitate Coexistence of Goose Species through Allometric Responses in Wetlands
	Zhang, Yong; Prins, Herbert H. T.; Cao, Lei; Zhao, Meijuan; de Boer, Willem F.
刊名	WATERBIRDS
	2016-03
卷号	39 期号:1 页码:34-44
关键词	Anser albifrons Anser fabalis Bean Goose body size forage quality forage quantity grassland Greater White-fronted Goose habitat selection heterogeneity
英文摘要	Allometric scaling law predicts that herbivores respond differently to the availability of resources, mediated by body size. However, studies of allometric responses have often focused on animals with a relatively large difference in body size. Here, using a correlative field study, habitat use by two herbivorous species, the Bean Goose (Anser fabalis) and the Greater White-fronted Goose (A. albifrons), with a relatively small difference in body size was investigated during the wintering period. Both a generalized linear mixed model and a mixed logistic regression model showed that both species selected lower lying areas that were recently exposed, and, as expected, the smaller Greater White-fronted Goose showed a stronger selection of foraging habitat than the larger Bean Goose. Sward height also influenced habitat selection by both species, and the smaller species selected shorter swards than the larger species. In terms of forage quality, both models failed to detect a significant effect of nitrogen content on goose habitat selection. A logistic regression model showed that structural heterogeneity of the sward negatively correlated with the patch selection of the smaller species, but for the larger species such a correlation was not found. In agreement with our hypotheses, our results provide some preliminary indication that coexistence of the two goose species studied here might be mediated by an allometric response even if the difference in body size is relatively small.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/35694]
专题	生态环境研究中心_城市与区域生态国家重点实验室
推荐引用方式 GB/T 7714	Zhang, Yong,Prins, Herbert H. T.,Cao, Lei,et al. Variation in Elevation and Sward Height Facilitate Coexistence of Goose Species through Allometric Responses in Wetlands[J]. WATERBIRDS,2016,39(1):34-44.
APA	Zhang, Yong,Prins, Herbert H. T.,Cao, Lei,Zhao, Meijuan,&de Boer, Willem F..(2016).Variation in Elevation and Sward Height Facilitate Coexistence of Goose Species through Allometric Responses in Wetlands.WATERBIRDS,39(1),34-44.
MLA	Zhang, Yong,et al."Variation in Elevation and Sward Height Facilitate Coexistence of Goose Species through Allometric Responses in Wetlands".WATERBIRDS 39.1(2016):34-44.