Arid
DOI10.1111/jeb.13223
Macroecological patterns of sexual size dimorphism in turtles of the world
Agha, M.1; Ennen, J. R.2; Nowakowski, A. J.1; Lovich, J. E.3; Sweat, S. C.2; Todd, B. D.1
通讯作者Agha, M.
来源期刊JOURNAL OF EVOLUTIONARY BIOLOGY
ISSN1010-061X
EISSN1420-9101
出版年2018
卷号31期号:3页码:336-345
英文摘要

Sexual size dimorphism (SSD) is a well-documented phenomenon in both plants and animals; however, the ecological and evolutionary mechanisms that drive and maintain SSD patterns across geographic space at regional and global scales are understudied, especially for reptiles. Our goal was to examine geographic variation of turtle SSD and to explore ecological and environmental correlates using phylogenetic comparative methods. We use published body size data on 135 species from nine turtle families to examine how geographic patterns and the evolution of SSD are influenced by habitat specialization, climate (annual mean temperature and annual precipitation) and climate variability, latitude, or a combination of these predictor variables. We found that geographic variation, magnitude and direction of turtle SSD are best explained by habitat association, annual temperature variance and annual precipitation. Use of semi-aquatic and terrestrial habitats was associated with male-biased SSD, whereas use of aquatic habitat was associated with female-biased SSD. Our results also suggest that greater temperature variability is associated with female-biased SSD. In contrast, wetter climates are associated with male-biased SSD compared with arid climates that are associated with female-biased SSD. We also show support for a global latitudinal trend in SSD, with females being larger than males towards the poles, especially in the families Emydidae and Geoemydidae. Estimates of phylogenetic signal for both SSD and habitat type indicate that closely related species occupy similar habitats and exhibit similar direction and magnitude of SSD. These global patterns of SSD may arise from sex-specific reproductive behaviour, fecundity and sex-specific responses to environmental factors that differ among habitats and vary systematically across latitude. Thus, this study adds to our current understanding that while SSD can vary dramatically across and within turtle species under phylogenetic constraints, it may be driven, maintained and exaggerated by habitat type, climate and geographic location.


英文关键词body size evolution differential selection ecological divergence interspecific growth morphological variation
类型Article
语种英语
国家USA
收录类别SCI-E ; SSCI
WOS记录号WOS:000426731400001
WOS关键词GEOGRAPHIC-VARIATION ; BODY-SIZE ; ACTINEMYS-MARMORATA ; RENSCHS RULE ; MAP TURTLES ; POND TURTLE ; HABITAT USE ; GROWTH ; EVOLUTION ; HYPOTHESES
WOS类目Ecology ; Evolutionary Biology ; Genetics & Heredity
WOS研究方向Environmental Sciences & Ecology ; Evolutionary Biology ; Genetics & Heredity
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/210877
作者单位1.Univ Calif Davis, Dept Wildlife Fish & Conservat Biol, One Shields Ave, Davis, CA 95616 USA;
2.Tennessee Aquarium Conservat Inst, Chattanooga, TN USA;
3.US Geol Survey, Southwest Biol Sci Ctr, Flagstaff, AZ 86001 USA
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GB/T 7714
Agha, M.,Ennen, J. R.,Nowakowski, A. J.,et al. Macroecological patterns of sexual size dimorphism in turtles of the world[J],2018,31(3):336-345.
APA Agha, M.,Ennen, J. R.,Nowakowski, A. J.,Lovich, J. E.,Sweat, S. C.,&Todd, B. D..(2018).Macroecological patterns of sexual size dimorphism in turtles of the world.JOURNAL OF EVOLUTIONARY BIOLOGY,31(3),336-345.
MLA Agha, M.,et al."Macroecological patterns of sexual size dimorphism in turtles of the world".JOURNAL OF EVOLUTIONARY BIOLOGY 31.3(2018):336-345.
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