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Temperature dependence of the functional response
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- Englund, Göran, 1957- (author)
- Umeå universitet,Institutionen för ekologi, miljö och geovetenskap
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- Öhlund, Gunnar, 1977- (author)
- Umeå universitet,Institutionen för ekologi, miljö och geovetenskap
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- Hein, Catherine L, 1980- (author)
- Umeå universitet,Institutionen för ekologi, miljö och geovetenskap,Climate Impacts Research Centre (CIRC), Abisko Scientific Research Station, SE-981 07 Abisko, Sweden
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- (creator_code:org_t)
- 2011-07-14
- 2011
- English.
- In: Ecology Letters. - : Wiley. - 1461-023X .- 1461-0248. ; 14:9, s. 914-21
- Journal article (peer-reviewed)
Abstract
Subject headings
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- The Arrhenius equation has emerged as the favoured model for describing the temperature dependence of consumption in predator-prey models. To examine the relevance of this equation, we undertook a meta-analysis of published relationships between functional response parameters and temperature. We show that, when plotted in lin-log space, temperature dependence of both attack rate and maximal ingestion rate exhibits a hump-shaped relationship and not a linear one as predicted by the Arrhenius equation. The relationship remains significantly downward concave even when data from temperatures above the peak of the hump are discarded. Temperature dependence is stronger for attack rate than for maximal ingestion rate, but the thermal optima are not different. We conclude that the use of the Arrhenius equation to describe consumption in predator-prey models requires the assumption that temperatures above thermal optima are unimportant for population and community dynamics, an assumption that is untenable given the available data.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences (hsv//eng)
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
Keyword
- Arrhenius
- attack rate
- functional response
- handling time
- optimum
- parasitoid
- predator
- prey
- response curve
- temperature
- Environmental Science
- miljövetenskap
Publication and Content Type
- ref (subject category)
- art (subject category)
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