- Title
- The functional significance of facultative hyperthermia varies with body size and phylogeny in birds
- Creator
- Gerson, Alexander R, McKechnie, Andrew, Smit, Ben, Whitfield, Maxine C, Smith, Eric K, Talbot, William A, McWhorter, Todd J, Wolf, Blair O
- Subject
- To be catalogued
- Date
- 2019
- Type
- text
- Type
- article
- Identifier
- http://hdl.handle.net/10962/441609
- Identifier
- vital:73901
- Identifier
- https://doi.org/10.1111/1365-2435.13274
- Description
- Facultative hyperthermia, the elevation of body temperature above normothermic levels, during heat exposure, importantly affects the wa-ter economy and heat balance of terrestrial endotherms. We currently lack a mechanistic understanding of the benefits hyperthermia provides for avian taxa. Facultative hyperthermia has been proposed to minimize rates of water loss via three distinct mechanisms: M1) by maintaining body temperature (Tb) above environmental temperatures (Te), heat can be lost non‐evaporatively, saving water; M2) by minimizing the thermal gradient when Te > Tb, environmental heat gain and evaporative water loss rates are reduced; and M3) by storing heat via increases in Tb which reduces evaporative heat loss demands and conserves wa-ter. Although individuals may benefit from all three mechanisms during heat exposure, the relative importance of each mechanism has not been quantified among species that differ in their body size, heat toler-ance and mechanisms of evaporative heat dissipation. We measured resting metabolism, evaporative water loss and real‐time Tb from 33 species of birds representing nine orders ranging in mass from 8 to 300 g and estimated the water savings associated with each proposed mechanism. We show that facultative hyperthermia varies in its benefits among species.
- Format
- 11 pages, pdf
- Language
- English
- Relation
- Functional Ecology, Gerson, A.R., McKechnie, A.E., Smit, B., Whitfield, M.C., Smith, E.K., Talbot, W.A., McWhorter, T.J. and Wolf, B.O., 2019. The functional significance of facultative hyperthermia varies with body size and phylogeny in birds. Functional Ecology, 33(4), pp.597-607, Functional Ecology volume 33 number 4 597 607 2019 1365-2435
- Rights
- Publisher
- Rights
- Use of this resource is governed by the terms and conditions of the Wiley Library Online Terms of Use Statement (https://onlinelibrary.wiley.com/terms-and-conditions)
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Smit, Ben (Dr)
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RU Department of Zoology and Entomology
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| Thumbnail | File | Description | Size | Format | |||
|---|---|---|---|---|---|---|---|
| View Details | SOURCE1 | The functional significance of facultative hyperthermia varies with body size and phylogeny in birds.pdf | 669 KB | Adobe Acrobat PDF | View Details |