Latitudinally structured variation in the temperature dependence of damselfly growth rates
2013 (English)In: Ecology Letters, ISSN 1461-023X, E-ISSN 1461-0248, Vol. 16, no 1, 64-71 p.Article in journal (Refereed) Published
The Metabolic Theory of Ecology predicts that the slope of the rate–temperature relationship, E, remains consistent across traits and organisms, acting as a major determinant of large-scale ecological patterns. Although E has recently been shown to vary systematically, we have a poor understanding of its ecological significance. To address this question, we conducted a common-garden experiment involving six damselfly species differing in distribution, estimating E at the level of full-sib families. Each species was sampled throughout its latitudinal range, allowing us to characterise variation in E along a latitudinal gradient spanning 3600 km. We show that E differs among populations and increases with latitude. E was right-skewness across species, but this was largely an artefact of the latitudinal trend. Increased seasonality towards higher latitude may contribute to the latitudinal trend in E. We conclude that E should be seen as a trait involved in local adaptation.
Place, publisher, year, edition, pages
2013. Vol. 16, no 1, 64-71 p.
Environmental variation; growth rate; metabolic theory of ecology; thermal dependence; universal temperature dependence
IdentifiersURN: urn:nbn:se:umu:diva-62267DOI: 10.1111/ele.12013OAI: oai:DiVA.org:umu-62267DiVA: diva2:576927