Publication with datasets Hoffmann et al. 2002, Opposing clines for high and low temperature resistance in Drosophila melanogaster, Ecology Letters

Keywords
Cold shock, Geographical variation, Heat shock and Thermoresistance

Summary

ABSTRACT: In insects, species comparisons suggest a weak association between upper thermal limits and latitude in contrast to a stronger association for lower limits. To compare this to latitudinal patterns of thermal responses within species, we considered latitudinal variation in heat and cold resistance in Drosophila melanogaster. We found opposing clines in resistance to these temperature extremes in comparisons of 17-24 populations from coastal eastern Australia. Knockdown time following heat shock increased towards the tropics, whereas recovery time following cold shock decreased towards temperate latitudes. Mortality following cold shock also showed a clinal pattern. Clinal associations with latitude were linear and related to minimum temperatures in the coldest month (for cold resistance) and maximum temperatures in the warmest month (for heat resistance). This suggests that within species both high and low temperature responses can vary with latitude as a consequence of direct or indirect effects of selection.

Datasets

  • 12 Hoffmann et al. 2002, Cold recovery time

    This data contains cold recovery time for female Drosophila melanogaster from 83 isofemale lines and originating from 18 populations collected in 1999-2000 (Fig. 1b). Note longitudes in data are approximate.

  • 13 Hoffmann et al. 2002, Cold resistance survival

    This data file contains survival (out of 20) after exposure to -2°C for 2 hours for female Drosophila melanogaster originating from eight populations collected in 1999-2000 (Fig. 1c). Note longitudes in data are approximate.

  • 14 Hoffmann et al. 2002, Heat knockdown time

    This data contains raw heat knockdown time (minutes) for female Drosophila melanogaster from 176 isofemale lines and originating from 24 populations collected in 1999-2000 (Fig. 1a). Note longitudes in data are approximate.

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