Phenotypic Flexibility in a Novel Thermal Environment: Phylogenetic Inertia in Thermogenic Capacity and Evolutionary Adaptation in Organ Size

2004 ◽  
Vol 77 (5) ◽  
pp. 805-815 ◽  
Author(s):  
Leonardo D. Bacigalupe ◽  
Roberto F. Nespolo ◽  
Juan C. Opazo ◽  
Francisco Bozinovic
Keyword(s):  
Thermal Environment ◽  
Organ Size ◽  
Phenotypic Flexibility ◽  
Evolutionary Adaptation ◽  
Phylogenetic Inertia ◽  
Thermogenic Capacity

Altitudinal implications in organ size in the Andrew’s toad (Bufo andrewsi)

2019 ◽  
Vol 69 (3) ◽  
pp. 365-376 ◽  
Author(s):  
Li Zhao ◽  
Chun Lan Mai ◽  
Guo Hou Liu ◽  
Wen Bo Liao
Keyword(s):  
Environmental Gradient ◽  
Oxygen Supply ◽  
Environmental Gradients ◽  
Relative Size ◽  
Organ Size ◽  
Phenotypic Flexibility ◽  
Energy Demands ◽  
Morphological And Physiological Traits ◽  
Bufo Andrewsi ◽  
Toad Bufo

Abstract Phenotypic flexibility of morphological and physiological traits within species is a common phenomenon across animal taxa. Hesse’s rule predicts that the size of an organ should exhibit an increase with increasing altitude along environmental gradients due to changes in oxygen supply and energy demands. Here, we test the prediction of Hesse’s rule by investigating geographical variation in the relative size of organs (i.e., heart, lungs, liver, and kidneys) across ten populations of Bufo andrewsi along an environmental gradient. We found that the relative size of these four specific organs did not increase with altitude or latitude across all populations. We also did not find that the relative size of the organs increased with increasing altitude among six populations located at a similar latitude and longitude, which is inconsistent with Hesse’s rule. Our findings suggest that oxygen supply and energy demands do not necessarily affect variation in organ size among populations.

scholarly journals Temperature heterogeneity correlates with intraspecific variation in physiological flexibility in a small endotherm

2020 ◽  
Author(s):  
Maria Stager ◽  
Nathan R. Senner ◽  
David L. Swanson ◽  
Matthew D. Carling ◽  
Douglas K. Eddy ◽  
...  
Keyword(s):  
Population Genetic ◽  
Environmental Heterogeneity ◽  
Thermal Environment ◽  
Phenotypic Flexibility ◽  
Junco Hyemalis ◽  
Nucleotide Polymorphisms ◽  
Single Nucleotide ◽  
Specific Variation ◽  
Physiological Flexibility

ABSTRACTPhenotypic flexibility allows individuals to reversibly modify trait values and theory predicts an individual’s relative degree of flexibility positively correlates with the environmental heterogeneity it experiences. We tested this prediction by integrating surveys of population genetic and physiological variation with thermal acclimation experiments and indices of environmental heterogeneity in the Dark-eyed Junco (Junco hyemalis) and its congeners. We combined measures of thermogenic capacity for ~300 individuals, >21,000 single nucleotide polymorphisms genotyped in 192 individuals, and laboratory acclimations replicated on five populations. We found that Junco populations: (1) differ in their thermal performance responses to temperature variation in situ; (2) exhibit intra-specific variation in their thermogenic flexibility in the laboratory that correlates with heterogeneity in their native thermal environment; and (3) harbor genetic variation that also correlates with temperature heterogeneity. These results provide comprehensive support that phenotypic flexibility corresponds with environmental heterogeneity and highlight its importance for coping with environmental change.

scholarly journals Temperature heterogeneity correlates with intraspecific variation in physiological flexibility in a small endotherm

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Maria Stager ◽  
Nathan R. Senner ◽  
David L. Swanson ◽  
Matthew D. Carling ◽  
Douglas K. Eddy ◽  
...  
Keyword(s):  
Population Genetic ◽  
Environmental Heterogeneity ◽  
Thermal Environment ◽  
Allelic Variation ◽  
Phenotypic Flexibility ◽  
Junco Hyemalis ◽  
Nucleotide Polymorphisms ◽  
Single Nucleotide ◽  
Specific Variation ◽  
Physiological Flexibility

AbstractPhenotypic flexibility allows individuals to reversibly modify trait values and theory predicts an individual’s relative degree of flexibility positively correlates with the environmental heterogeneity it experiences. We test this prediction by integrating surveys of population genetic and physiological variation with thermal acclimation experiments and indices of environmental heterogeneity in the Dark-eyed Junco (Junco hyemalis) and its congeners. We combine field measures of thermogenic capacity for 335 individuals, 22,006 single nucleotide polymorphisms genotyped in 181 individuals, and laboratory acclimations replicated on five populations. We show that Junco populations: (1) differ in their thermogenic responses to temperature variation in the field; (2) harbor allelic variation that also correlates with temperature heterogeneity; and (3) exhibit intra-specific variation in thermogenic flexibility in the laboratory that correlates with the heterogeneity of their native thermal environment. These results provide comprehensive support that phenotypic flexibility corresponds with environmental heterogeneity and highlight its importance for coping with environmental change.

Evolutionary Adaptation to Temperature. I. Fitness Responses of Escherichia coli to Changes in its Thermal Environment

Evolution ◽  
1992 ◽  
Vol 46 (1) ◽  
pp. 16 ◽  
Author(s):  
Albert F. Bennett ◽  
Richard E. Lenski ◽  
John E. Mittler
Keyword(s):  
Escherichia Coli ◽  
Thermal Environment ◽  
Evolutionary Adaptation
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