Temperature acclimation and competitive fitness: anexperimental test of the beneficial acclimation assumption.

Leroi, Armand M.; Bennett, Albert A.; Lenski, Richard E.

doi:10.1073/pnas.91.5.1917

Cited by 289 publications

(324 citation statements)

References 20 publications

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“…If anything, 18°C flies are less fecund. Secondly, it contradicts a 'beneficial acclimation hypothesis' (Leroi et al, 1994;Zamudio et a!., 1994), which predicts that flies raised at 25°C should be more fecund (relative to flies raised at 18°C) if laying at 25°C, which was the case, but less fecund if laying at 18°C, which was not.…”

Section: Discussionmentioning

confidence: 47%

Within- and between-generation effects of temperature on early fecundity of Drosophila melanogaster

et al. 1995

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We used a repeated-measures, four-factor experimental design to determine how the fecundity of Drosophila melanogaster during the first 5 days of adult life was influenced by paternal, maternal, developmental and laying temperature, with two different temperature levels (18°C vs. 25°C) per factor. Laying temperature had by far the largest effect on fecundity and accounted for 79 per cent of the variance in overall fecundity: flies laying at 25°C began laying eggs about a day earlier and had much higher daily fecundities than did those laying at 18°C. Developmental temperature had no significant effect either on overall fecundity or on the pattern of daily egg production. Dam temperature had a slight effect on the pattern of daily egg production, but not on overall fecundity. In contrast, sire temperature slightly influenced both overall fecundity and the pattern of daily egg production. Our results demonstrate that early fecundity is extraordinarily sensitive to laying temperature (360 per cent increase if laying at 25°C vs. at 18°C), but is relatively well buffered against developmental and cross-generational effects (maximum effect only 7 per cent, for sire temperature).

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Section: Discussionmentioning

confidence: 47%

Within- and between-generation effects of temperature on early fecundity of Drosophila melanogaster

et al. 1995

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“…It has been repeatedly argued that temporally variable environments should select for increased phenotypic flexibility (19,41,42,56). This hypothesis that evolution in a temporally varying environment would increase phenotypic flexibility was not supported when tested in variable thermal environments in experimental lineages of E. coli (7,39,40). However, there was significant support for this hypothesis when we tested our Table 3).…”

Section: Experimental Evolutionary Adaptation To Environmental Phcontrasting

confidence: 35%

Microbial experimental evolution

Bennett¹,

Hughes²

2009

American Journal of Physiology-Regulatory, Integrative and Comp

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Microbes have been widely used in experimental evolutionary studies because they possess a variety of valuable traits that facilitate large-scale experimentation. Many replicated populations can be cultured in the laboratory simultaneously along with appropriate controls. Short generation times and large population sizes make microbes ideal experimental subjects, ensuring that many spontaneous mutations occur every generation and that adaptive variants can spread rapidly through a population. Another highly useful experimental feature is the ability to preserve and store ancestral and evolutionarily derived clones. These can be revived in parallel to allow the direct measurement of the competitive fitness of a descendant compared with its ancestor. The extent of adaptation can thereby be measured quantitatively and compared statistically by direct competition among derived groups and with the ancestor. Thus, fitness and adaptation need not be matters of qualitative speculation, but are quantitatively measurable variables in these systems. Replication allows the quantification of heterogeneity in responses to imposed selection and thereby statistical distinction between changes that are systematic responses to the selective regimen and those that are specific to individual populations.

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“…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). Furthermore, RMR winter responses were partially in line with beneficial acclimation (Leroi et al 1994; for alternative acclimation hypotheses, see ClusellaTrullas et al 2010) because RMR was minimized at the temperature that most closely matched the acclimation temperature (but not at the intermediate test temperature of 207C; fig. 1).…”

Section: Discussionmentioning

confidence: 83%

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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Temperature acclimation and competitive fitness: anexperimental test of the beneficial acclimation assumption.

Cited by 289 publications

References 20 publications

Within- and between-generation effects of temperature on early fecundity of Drosophila melanogaster

Within- and between-generation effects of temperature on early fecundity of Drosophila melanogaster

Microbial experimental evolution

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

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