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Cold truths: how winter drives responses of terrestrial organisms to climate change
TLDR
This work synthesises organismal responses to winter climate change, and uses this synthesis to build a framework to predict exposure and sensitivity to negative impacts, which can be used to estimate the vulnerability of species to winterClimate change. Expand
Reestablishment of ion homeostasis during chill-coma recovery in the cricket Gryllus pennsylvanicus
TLDR
Evidence is provided that physiological mechanisms of hemolymph ion content and volume regulation, such as ion-motive ATPase activity, are instrumental in chill-coma recovery and may underlie natural variation in insect cold tolerance. Expand
Thermal Variability Increases the Impact of Autumnal Warming and Drives Metabolic Depression in an Overwintering Butterfly
TLDR
It is concluded that thermal variability drives the expression of metabolic suppression in this species; that phenological shifts will have a greater impact on ectotherms in variable thermal environments; and that E. propertius will be more sensitive to shifts in phenology in autumn than in spring. Expand
Rapid changes in desiccation resistance in Drosophila melanogaster are facilitated by changes in cuticular permeability.
TLDR
Female, but not male adult D. melanogaster increased their resistance to desiccation after 1h of recovery from a 3 to 4.5h pre-treatment that depletes them of 10% of their water content, and further investigation indicated that a change in cuticular water loss rate accounted for this decrease. Expand
Real-time measurement of metabolic rate during freezing and thawing of the wood frog, Rana sylvatica: implications for overwinter energy use
TLDR
Overwinter carbohydrate consumption appears to be driven by the frequency of freeze–thaw events, and changes in overwinter climate that affect the frequencyof freeze-thaw will influence carbohydrate consumption, but changes that affect mean temperatures and thefrequency of winter warm spells will modify lipid consumption. Expand
Lipotoxicity in steatohepatitis occurs despite an increase in tricarboxylic acid cycle activity.
TLDR
Sustained induction of mitochondrial TCA cycle failed to prevent accretion of "lipotoxic" metabolites in the liver and could hasten inflammation and the metabolic transition to NASH. Expand
Intra-individual variation allows an explicit test of the hygric hypothesis for discontinuous gas exchange in insects
TLDR
DGCs reduce RWL in E. propertius, which is consistent with the suggestion that water loss reduction could account for the evolutionary origin and/or maintenance of DGCs in insects. Expand
Lepidopteran species differ in susceptibility to winter warming
TLDR
The observed overwinter mass loss by E. propertius and P. troilus was predominantly due to water loss; thus it is concluded that mass loss is not an appropriate measurement of energy drain in insects, rather body composition should be measured directly. Expand
Variation in Thermal Performance among Insect Populations*
TLDR
It is highlighted that while there is substantial evidence for among-population variation that is generally correlated with local climate regimes, neither the underlying mechanisms nor the implications for whole-animal fitness in the field are well understood. Expand
Cold adaptation shapes the robustness of metabolic networks in Drosophila melanogaster
TLDR
The metabolites of cold‐hardy flies were less cold responsive and their metabolic networks during cold exposure were more robust, supporting the hypotheses that hardy flies maintain metabolic homeostasis better duringcold exposure and recovery, and that their metabolic Networks are more robust to cold‐induced perturbations. Expand
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