Flies evolved small bodies and cells at high or fluctuating temperatures

Adrian, Gregory J.; Czarnołęski, Marcin; Angilletta, Michael J.

doi:10.1002/ece3.2534

Cited by 30 publications

(23 citation statements)

References 39 publications

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“…Increasing temperature tends to be associated with smaller cell sizes in a variety of organisms (reviewed in [61,62]; also see [63][64][65][66][67][68]). Small cells (and organisms containing them) tend to have higher mass-specific metabolic rates than large cells (and organisms containing them) [26,[69][70][71][72][73][74][75][76][77].…”

Section: Implications Of Results For Theorymentioning

confidence: 99%

Effects of Contingency versus Constraints on the Body-Mass Scaling of Metabolic Rate

Glazier

2018

Challenges

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I illustrate the effects of both contingency and constraints on the body-mass scaling of metabolic rate by analyzing the significantly different influences of ambient temperature (T a ) on metabolic scaling in ectothermic versus endothermic animals. Interspecific comparisons show that increasing T a results in decreasing metabolic scaling slopes in ectotherms, but increasing slopes in endotherms, a pattern uniquely predicted by the metabolic-level boundaries hypothesis, as amended to include effects of the scaling of thermal conductance in endotherms outside their thermoneutral zone. No other published theoretical model explicitly predicts this striking variation in metabolic scaling, which I explain in terms of contingent effects of T a and thermoregulatory strategy in the context of physical and geometric constraints related to the scaling of surface area, volume, and heat flow across surfaces. My analysis shows that theoretical models focused on an ideal 3/4-power law, as explained by a single universally applicable mechanism, are clearly inadequate for explaining the diversity and environmental sensitivity of metabolic scaling. An important challenge is to develop a theory of metabolic scaling that recognizes the contingent effects of multiple mechanisms that are modulated by several extrinsic and intrinsic factors within specified constraints.

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Section: Implications Of Results For Theorymentioning

confidence: 99%

Effects of Contingency versus Constraints on the Body-Mass Scaling of Metabolic Rate

Glazier

2018

Challenges

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“…Indeed, other studies on these lines have revealed divergence in other traits including body size, cell size, and metabolism across treatments (Adrian et al. ; Alton et al. ).…”

Section: Discussionmentioning

confidence: 97%

“…It may be that the evolved changes in recombination rate among selection regimes are indirect consequences of natural selection on other phenotypes that are relevant for the experimental evolution treatments. Indeed, other studies on these lines have revealed divergence in other traits including body size, cell size, and metabolism across treatments (Adrian et al 2016;Alton et al 2016).…”

Section: Genetic Variation In Recombinationmentioning

confidence: 99%

Experimental evolution across different thermal regimes yields genetic divergence in recombination fraction but no divergence in temperature associated plastic recombination

Kohl

Singh

2018

Evolution

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Phenotypic plasticity is pervasive in nature. One mechanism underlying the evolution and maintenance of such plasticity is environmental heterogeneity. Indeed, theory indicates that both spatial and temporal variation in the environment should favor the evolution of phenotypic plasticity under a variety of conditions. Cyclical environmental conditions have also been shown to yield evolved increases in recombination frequency. Here, we use a panel of replicated experimental evolution populations of D. melanogaster to test whether variable environments favor enhanced plasticity in recombination rate and/or increased recombination rate in response to temperature. In contrast to expectation, we find no evidence for either enhanced plasticity in recombination or increased rates of recombination in the variable environment lines. Our data confirm a role of temperature in mediating recombination fraction in D. melanogaster, and indicate that recombination is genetically and plastically depressed under lower temperatures. Our data further suggest that the genetic architectures underlying plastic recombination and population-level variation in recombination rate are likely to be distinct.

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“…Smaller cells speed metabolism during periods of warming but require more energy to maintain and repair. At a low temperature, when metabolism proceeds slowly, large cells should provide a sufficient surface to transport the metabolites required to sustain life (Adrian et al 2016). Birds are in relative metabolic rest in winter.…”

Section: Discussionmentioning

confidence: 99%

Age, sex and seasonal variation in the shape and size of erythrocytes of the alpine accentor,Prunella collaris(Passeriformes: Prunellidae)

Janiga

Haas

Kufelová

2017

The European Zoological Journal

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To cite this article: M. Janiga, M. Haas & M. Kufelová (2017) Age, sex and seasonal variation in the shape and size of erythrocytes of the alpine accentor, Prunellacollaris AbstractThe aim of our study was to analyse red blood cells from the high-altitude avian species alpine accentor (Prunella collaris). We caught 79 alpine accentors in the High Tatra Mountains (the West Carpathians, Slovakia) from 2001 to 2008. Blood samples were collected from the vena ulnaris cutanea. The cells and nuclei of juveniles tend to be wider and larger while adults, especially males, tend to have elongated (narrow) cells. The largest erythrocytes were found in winter and the smallest in summer, in June. Red blood cells with larger, elongated nuclei but overall smaller in size occurred at the beginning and the end of the breeding season, while larger, rounded cells with smaller nuclei were found in the middle of the breeding season. This kind of reshaping of erythrocytes of alpine accentors in summer is probably a response to hypoxia and elevated summer temperature in high mountains. As regards the length/width ratio, in August and September, erythrocytes were more elongated (both cell and nucleus) than in the other months. This study is probably the first assessment of seasonal effects on size and shape of red blood cells of bird species permanently living and breeding at high altitudes of the Palearctic mountains.

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Flies evolved small bodies and cells at high or fluctuating temperatures

Cited by 30 publications

References 39 publications

Effects of Contingency versus Constraints on the Body-Mass Scaling of Metabolic Rate

Effects of Contingency versus Constraints on the Body-Mass Scaling of Metabolic Rate

Experimental evolution across different thermal regimes yields genetic divergence in recombination fraction but no divergence in temperature associated plastic recombination

Age, sex and seasonal variation in the shape and size of erythrocytes of the alpine accentor,Prunella collaris(Passeriformes: Prunellidae)

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