干旱区生态环境知识资源中心(Arid): Ontogenetic variation in the diet of the anuran community from a semi-arid environment in the southeastern Chihuahuan Desert

Arid

DOI	10.7717/peerj.7908
	Ontogenetic variation in the diet of the anuran community from a semi-arid environment in the southeastern Chihuahuan Desert
	Luria-Manzano, Ricardo; Ramirez-Bautista, Aurelio
通讯作者	Ramirez-Bautista, Aurelio
来源期刊	PEERJ
ISSN	2167-8359
出版年	2019
卷号	7
英文摘要	Although ontogeny influences dietary composition and trophic niche breadth in many anurans, its effects on diet have been little analyzed in sympatric species. In this study, we analyzed interspecific and ontogenetic variation in dietary composition and trophic niche width in an anuran community from a semi-arid environment. We found a more profound effect of species identity than body size on dietary composition, with the diet of four species dominated by formicids, that of two others by coleopterans and formicids, and that of the remaining species not dominated by specific prey types. We found ontogenetic changes in dietary composition in three of four species analyzed, in which consumption of some small insects decreased as predator size increased, regardless of species. Additionally, we did not find ontogenetic change in prey number consumed in any of the four species, but prey size increased with increasing predator size in all of them. Most species exhibited a narrow trophic niche, which was even narrower in adults in three of the four species analyzed. Costello's modified plots revealed a high variation among individuals in termite consumption in Anaxyrus punctatus, and in more prey types in Spea multiplicata. Our results suggest that this community is not size-structured, and that ontogenetic diet shifts are mainly caused by passive sampling toward prey of different sizes. Finally, comparisons with previous data revealed an interpopulation pattern, in which trophic niche width contracts as aridity increases, possibly because of an increase in interspecific competition for trophic resources.
英文关键词	Dietary composition Formicidae Diptera Intraspecific variation Trophic niche width
类型	Article
语种	英语
国家	Mexico
开放获取类型	gold, Green Published
收录类别	SCI-E
WOS记录号	WOS:000490976600007
WOS关键词	POSTMETAMORPHIC LITTER ANURANS ; FEEDING STRATEGY ; SIZE ; NICHE ; FROGS ; BUFONIDAE ; ECOLOGY ; AMPHIBIANS ; DIVERSITY
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
EI主题词	2019-10-18
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310313
作者单位	Univ Autonoma Estado Hidalgo, Lab Ecol Poblac, Ctr Invest Biol, Inst Ciencias Basicas & Ingn, Pachuca, Hidalgo, Mexico
推荐引用方式 GB/T 7714	Luria-Manzano, Ricardo,Ramirez-Bautista, Aurelio. Ontogenetic variation in the diet of the anuran community from a semi-arid environment in the southeastern Chihuahuan Desert[J],2019,7.
APA	Luria-Manzano, Ricardo,&Ramirez-Bautista, Aurelio.(2019).Ontogenetic variation in the diet of the anuran community from a semi-arid environment in the southeastern Chihuahuan Desert.PEERJ,7.
MLA	Luria-Manzano, Ricardo,et al."Ontogenetic variation in the diet of the anuran community from a semi-arid environment in the southeastern Chihuahuan Desert".PEERJ 7(2019).