J
Johannes Overgaard
Researcher at Aarhus University
Publications - 150
Citations - 8058
Johannes Overgaard is an academic researcher from Aarhus University. The author has contributed to research in topics: Cold acclimation & Ectotherm. The author has an hindex of 44, co-authored 142 publications receiving 6754 citations. Previous affiliations of Johannes Overgaard include University of Melbourne & Odense University.
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Journal ArticleDOI
Upper thermal limits of Drosophila are linked to species distributions and strongly constrained phylogenetically
Vanessa Kellermann,Johannes Overgaard,Ary A. Hoffmann,Camilla Fløjgaard,Jens-Christian Svenning,Volker Loeschcke +5 more
TL;DR: It is suggested that this group of insects is unlikely to buffer global change effects through marked evolutionary changes, highlighting the importance of facilitating range shifts for maintaining biodiversity.
Journal ArticleDOI
The Integrative Physiology of Insect Chill Tolerance
TL;DR: A physiological model is outlined that integrates several of the adaptation and acclimation responses that allow some insects to tolerate low temperatures and discusses how they collectively help to preserve cellular, organ, and organismal homeostasis at low temperature.
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Phylogenetic constraints in key functional traits behind species' climate niches: patterns of desiccation and cold resistance across 95 Drosophila species.
Vanessa Kellermann,Volker Loeschcke,Ary A. Hoffmann,Torsten Nygaard Kristensen,Camilla Fløjgaard,Jean R. David,Jens-Christian Svenning,Johannes Overgaard +7 more
TL;DR: In this paper, the authors used an array of phylogenetic analyses to determine two key climatic niche traits (desiccation and cold resistance) for 92-95 Drosophila species and assessed their importance for geographic distributions, while controlling for acclimation, phylogeny, and spatial autocorrelation.
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Changes in membrane lipid composition following rapid cold hardening in Drosophila melanogaster
Johannes Overgaard,Jesper Givskov Sørensen,Søren O. Petersen,Volker Loeschcke,Martin Holmstrup +4 more
TL;DR: Cold selection resulted in PLFA changes, which may improve the ability to harden during RCH, which is consistent with the membrane response typically found during cold acclimation in ectothermic animals and likely adaptive to maintain membrane function during cold.
Journal ArticleDOI
Does oxygen limit thermal tolerance in arthropods? A critical review of current evidence.
Wilco C. E. P. Verberk,Johannes Overgaard,Rasmus Ern,Mark Bayley,Tobias Wang,Leigh Boardman,John S. Terblanche +6 more
TL;DR: Whether taxa show oxygen limitation at thermal extremes may be contingent on their capacity to regulate oxygen uptake, which in turn is linked to their respiratory medium (air vs. water).