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26 results for “Thermal Fluctuations”
Data from: Thermal fluctuations affect the transcriptome through mechanisms independent of average temperature
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Data from: Fluctuating thermal environments and time-dependent effects on fruit fly egg-hatching performance
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Data from: Few genetic and environmental correlations between life history and stress resistance traits affect adaptation to fluctuating thermal regimes
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Data from: Experimental evolution under fluctuating thermal conditions does not reproduce patterns of adaptive clinal differentiation in Drosophila melanogaster
Experimental evolution can be a useful tool for testing the impact of environmental factors on adaptive changes in populations, and this approach is being increasingly used to understand the potential for evolutionary responses in populations under changing climates. However in natural populations selective factors will often be more complex than in laboratory environments and produce different patterns of adaptive differentiation. Here we test the ability for laboratory experimental evolution under different temperature cycles to reproduce well-known patterns of clinal variation in Drosophila melanogaster. Six fluctuating thermal regimes mimicking the natural temperature conditions along the east coast of Australia were initiated. Contrary to expectations based on field patterns there was no evidence for adaptation to thermal regimes as reflected by changes in cold and heat resistance following 1-3 years of laboratory natural selection. While laboratory evolution led to changes in starvation resistance, development time and body size, patterns were not consistent with those seen in natural populations. These findings highlight the complexity of factors affecting trait evolution in natural populations and indicate that caution is required when inferring likely evolutionary responses from the outcome of experimental evolution studies.
Environmental fluctuations accelerate molecular evolution of thermal tolerance in a marine diatom
<p>Data (other than molecular data, which are in the Sequence Read Archive as Bioproject PRJNA397360) for "Environmental fluctuations accelerate molecular evolution of thermal tolerance in a marine diatom" https://doi.org/10.1038/s41467-018-03906-5. </p> <p>1. "Data Figure01 natcomms Schaum et al.xlsx" contains data to analyse (and produce Figure 1A and B) for the fitness trajectories and thermal tolerance curves of growth.</p> <p>2. The raw growth rate data for the thermal tolerance curves of growth are provided in separate files: Data_thermal_tolerance_growth_t000.csv,Data_thermal_tolerance_growth_t100.csv,Data_thermal_tolerance_growth_t300.csv contain the growth rates across a temperature gradient for the ancestor (t000), the evolved samples after 100 generations (t100) and after 300 generations (t300). In these files, assayT is the assay temperature in degrees C, selected is the selection regime, and bore is the biological replicate. r is the growth rate, K is carrying capacity. quasi r2 (or 2) is a measure of the goodness of the fit that the growth rate was calculated from. pa is an identification column that gives a unique name to individual bioreplicate/ assay temperature/selection regime combinations. </p> <p>3. Photosynthesis and respiration data for Figure 2 a-e is contained in the files</p> <p>"tdep_metab_t300_32" for 32 degree C data after 300 generations</p> <p>"tdep_metab_t000" for the ancestor</p> <p>"tdep_metab_all_else" for all other metabolism data, i.e. photosynthesis and respiration data after 100 and 300 generations of evolution in all selection environments. </p> <p>As this is a large amount of data, they are saved in RDS format. they can be opened in any version of R using the command readRDS(name of file here). </p> <p>4. File "Data_cell_volume_CNratio_etc" contains pg C per cell, CN ratios, NP ratios, and CN ratios, as well as cell volume and chlorophyll to carbon ratios for all selection regimes in the ancestor and the evolved lineages. </p> <p>5. File "Data_cell_size_RNAProtein_etc.csv" contains data on size in µm, RNA and protein per cell, as well as silicate per cell. </p> <p> </p>
Data from: Experimental evolution under fluctuating thermal conditions does not reproduce patterns of adaptive clinal differentiation in Drosophila melanogaster
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