Arid
DOI10.1086/660970
Within-Species Digestive Tract Flexibility in Rufous-Collared Sparrows and the Climatic Variability Hypothesis
Maldonado, Karin1,2; Bozinovic, Francisco3,4; Rojas, Jose M.3,4; Sabat, Pablo3,4,5
通讯作者Maldonado, Karin
来源期刊PHYSIOLOGICAL AND BIOCHEMICAL ZOOLOGY
ISSN1522-2152
出版年2011
卷号84期号:4页码:377-384
英文摘要

The climatic variability hypothesis (CVH) states that species are geographically more widespread at higher latitudes because individuals have a broader range of physiological tolerance or phenotypic flexibility as latitude and climatic variability increase. However, it remains unclear to what extent climatic variability or latitude, acting on the phenotype, account for any observed geographical gradient in mean range size. In this study, we analyzed the physiological flexibility within the CVH framework by using an intraspecific population experimental approach. We tested for a positive relationship between digestive-tract flexibility (i.e., morphology and enzyme activities) and latitude and climatic and natural diet variability in populations of rufous-collared sparrows (Zonotrichia capensis) captured in desert (27 degrees S), Mediterranean (33 degrees S), and cold-temperate (41 degrees S) sites in Chile. In accordance with the CVH, we observed a positive relationship between the magnitude of digestive-tract flexibility and environmental variability but not latitude. The greatest digestive flexibility was observed in birds at middle latitudes, which experience the most environmental variability (a Mediterranean climate), whereas individuals from the most stable climates (desert and cold-temperate) exhibited little or no digestive-tract flexibility in response to experimental diets. Our findings support the idea that latitudinal gradients in geographical ranges may be strongly affected by the action of regional features, which makes it difficult to find general patterns in the distribution of species.


类型Article
语种英语
国家Chile
收录类别SCI-E
WOS记录号WOS:000292925900004
WOS关键词ZONOTRICHIA-CAPENSIS ; PHENOTYPIC PLASTICITY ; STABLE ISOTOPES ; THERMAL TOLERANCE ; GLOBAL ANALYSIS ; RAPOPORTS RULE ; ANNUAL CYCLE ; DIETARY ; BIRDS ; RESPONSES
WOS类目Physiology ; Zoology
WOS研究方向Physiology ; Zoology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/169964
作者单位1.Inst Filosofia & Ciencias Complejidad, Santiago, Chile;
2.Univ La Serena, Dept Biol, Fac Ciencias, La Serena, Chile;
3.Pontificia Univ Catolica Chile, Fac Ciencias Biol, Ctr Adv Studies Ecol & Biodivers, Lab Int Cambio Global, Santiago, Chile;
4.Pontificia Univ Catolica Chile, Fac Ciencias Biol, Dept Ecol, Santiago, Chile;
5.Univ Chile, Fac Ciencias, Dept Ciencias Ecol, Santiago, Chile
推荐引用方式
GB/T 7714
Maldonado, Karin,Bozinovic, Francisco,Rojas, Jose M.,et al. Within-Species Digestive Tract Flexibility in Rufous-Collared Sparrows and the Climatic Variability Hypothesis[J],2011,84(4):377-384.
APA Maldonado, Karin,Bozinovic, Francisco,Rojas, Jose M.,&Sabat, Pablo.(2011).Within-Species Digestive Tract Flexibility in Rufous-Collared Sparrows and the Climatic Variability Hypothesis.PHYSIOLOGICAL AND BIOCHEMICAL ZOOLOGY,84(4),377-384.
MLA Maldonado, Karin,et al."Within-Species Digestive Tract Flexibility in Rufous-Collared Sparrows and the Climatic Variability Hypothesis".PHYSIOLOGICAL AND BIOCHEMICAL ZOOLOGY 84.4(2011):377-384.
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