Why does metabolism scale with temperature?

Clarke, Andrew; Fraser, Keiron P. P.

doi:10.1111/j.0269-8463.2004.00841.x

Cited by 550 publications

(447 citation statements)

References 53 publications

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“…Although the thermal quality of the habitat is low in winter, warm days are scattered throughout the season, and these recurring opportunities, albeit unpredictable, may form part of the information acquired by these organisms. Increased metabolism (perhaps regulated via thyroid hormone; Little et al 2013) may enable rapid cellular responses to enhance performance in changing environmental conditions (Clarke and Fraser 2004). Indeed, metabolic cold compensation has been reported for other temperate species that remain active in winter (Roberts 1968;Dutton and Fitzpatrick 1974;Davies et al 1981;Tsuji 1988b).…”

Section: Discussionmentioning

confidence: 99%

The Behavior-Physiology Nexus: Behavioral and Physiological Compensation Are Relied on to Different Extents between Seasons

Basson

Clusella‐Trullas

2015

Physiological and Biochemical Zoology

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Environmental variability occurring at different timescales can significantly reduce performance, resulting in evolutionary fitness costs. Shifts in thermoregulatory behavior, metabolism, and water loss via phenotypic plasticity can compensate for thermal variation, but the relative contribution of each mechanism and how they may influence each other are largely unknown. Here, we take an ecologically relevant experimental approach to dissect these potential responses at two temporal scales: weather transients and seasons. Using acclimation to cold, average, or warm conditions in summer and winter, we measure the direction and magnitude of plasticity of resting metabolic rate (RMR), water loss rate (WLR), and preferred body temperature (T pref ) in the lizard Cordylus oelofseni within and between seasons. In summer, lizards selected lower T pref when acclimated to warm versus cold but had no plasticity of either RMR or WLR. By contrast, winter lizards showed partial compensation of RMR but no behavioral compensation. Between seasons, both behavioral and physiological shifts took place. By integrating ecological reality into laboratory assays, we demonstrate that behavioral and physiological responses of C. oelofseni can be contrasting, depending on the timescale investigated. Incorporating ecologically relevant scenarios and the plasticity of multiple traits is thus essential when attempting to forecast extinction risk to climate change.

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Section: Discussionmentioning

confidence: 99%

The Behavior-Physiology Nexus: Behavioral and Physiological Compensation Are Relied on to Different Extents between Seasons

Basson

Clusella‐Trullas

2015

Physiological and Biochemical Zoology

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“…Metabolic rate is a physiological measure of the rate at which organisms burn calories from assimilated food resources to produce energy for organismal functioning, and understanding metabolic rate variation is critical for investigating ecological processes at multiple levels of organization (Brown et al 2004;Sibly et al 2012). The majority of metabolic rate variation in animals coincides with variation in body mass and temperature (Peters 1983;Gillooly et al 2001;Brown et al 2004;Clarke and Fraser 2004;Cano and Nicieza 2006). Nonetheless, massand temperature-adjusted metabolic rates can vary substantially even among closely related taxa (McNab 1986;Clarke and Johnston 1999;Nagy et al 1999;Lovegrove 2000;Schaefer and Walters 2010).…”

Section: Introductionmentioning

confidence: 99%

Reduction of Energetic Demands through Modification of Body Size and Routine Metabolic Rates in Extremophile Fish

Passow¹,

Greenway²,

Arias‐Rodríguez³

et al. 2015

Physiological and Biochemical Zoology

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Variation in energy availability or maintenance costs in extreme environments can exert selection for efficient energy use, and reductions in organismal energy demand can be achieved in two ways: reducing body mass or metabolic suppression. Whether long-term exposure to extreme environmental conditions drives adaptive shifts in body mass or metabolic rates remains an open question. We studied body size variation and variation in routine metabolic rates in locally adapted populations of extremophile fish (Poecilia mexicana) living in toxic, hydrogen sulfide-rich springs and caves. We quantified size distributions and routine metabolic rates in wild-caught individuals from four habitat types. Compared with ancestral populations in nonsulfidic surface habitats, extremophile populations were characterized by significant reductions in body size. Despite elevated metabolic rates in cave fish, the body size reduction precipitated in significantly reduced energy demands in all extremophile populations. Laboratory experiments on common garden-raised fish indicated that elevated routine metabolic rates in cave fish likely have a genetic basis. The results of this study indicate that adaptation to extreme environments directly impacts energy metabolism, with fish living in cave and sulfide spring environments expending less energy overall during routine metabolism.

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“…Higher temperatures intensify metabolic demands (Robinson et al, 1983;Clarke and Fraser, 2004), and hyperbolic massspecific OCR curves accordingly reach elevated asymptotic levels (i.e., 1/K2). Observed increases in K1/K2 with temperature (Bridges and Brand, 1980) further imply a reduction of oxyregulating capacity at warmer temperatures under declining DO concentrations (Chen et al, 2001).…”

Section: Metabolic Scaling Hypothesismentioning

confidence: 99%

“…Physiologically, an antagonistic relationship exists between temperature and dissolved oxygen (Pörtner et al, 2005), because elevated reaction kinetics in response to temperature drive metabolic rates in concert with aerobic demands (Morgan Ernest et al, 2003;Packard and Gómez, 2008). Through effects on cellular metabolism, temperature also modulates physiological responses (Morgan Ernest et al, 2003;Clarke and Fraser, 2004) affecting the aerobic metabolic capacity (Claireaux and Chabot, 2016). As specified by the ecophysiological paradigm for aquatic ectotherms, temperature primarily controls metabolic demands for oxygen, while the supply of oxygen primarily limits metabolic capacity (Fry, 1971;Farrell and Richards, 2009).…”

Section: Introductionmentioning

confidence: 99%

Temperature-Modulated Expression of Allometric Respiration Strategies Supports a Metabolic Scaling Rule

Rakocinski

Gillam

2017

Front. Mar. Sci.

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A model based on the mass-specific oxygen consumption rate of the tolerant polychaete, Capitella telata, related meaningfully to a novel metabolic scaling rule as applied to the infaunal size spectrum. Depending on temperature, C. telata expressed divergent oxyregulating or oxyconforming strategies relative to oxygen availability. A non-linear response surface fitted to the allometric exponents of a family of V O2 curves for 12 treatment combinations of DO saturation and temperature was used to project oxygen consumption rates across the infaunal size spectrum. Plasticity in respiration strategies was evident, based on four simulated dynamic 32 d oxygen-temperature exposure scenarios and on simulated static oxygen-temperature exposures. The oxyconforming strategy of C. telata expressed under hypoxia near the upper thermal limit agreed with a hypothesized allometric scaling rule based on metabolic ecology. Conversely, an oxyregulating respiration strategy was expressed at cooler temperatures under low oxygen concentration, except organisms hyper-regulated relative to normoxic conditions. At warm temperatures, small organisms exhibited relatively greater metabolic depression than large organisms; whereas at cool temperatures, small organisms hyper-regulated relatively more than large organisms. Dichotomous shifts in respiration strategies likely reflect a breakdown in the functioning of special adaptations, and reliance on alternative coping mechanisms. Divergent temperature-dependent respiration strategies illustrate how responses to multiple stressors can be synergistic. Moreover, results imply that population responses to hypoxia may differ, depending on prevailing temperature regimes.

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Why does metabolism scale with temperature?

Cited by 550 publications

References 53 publications

The Behavior-Physiology Nexus: Behavioral and Physiological Compensation Are Relied on to Different Extents between Seasons

The Behavior-Physiology Nexus: Behavioral and Physiological Compensation Are Relied on to Different Extents between Seasons

Reduction of Energetic Demands through Modification of Body Size and Routine Metabolic Rates in Extremophile Fish

Temperature-Modulated Expression of Allometric Respiration Strategies Supports a Metabolic Scaling Rule

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