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Science 16 March 2007:
Vol. 315. no. 5818, p. 1497
DOI: 10.1126/science.1138090
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Technical Comments

Response to Comment on "Global Genetic Change Tracks Global Climate Warming in Drosophila subobscura"

Joan Balanyà,1* Josep M. Oller,2 Raymond B. Huey,3 George W. Gilchrist,4 Luis Serra1

Rodríguez-Trelles and Rodríguez advocate standardizing old and new collections by climate rather than by calendar and also propose that some of our samples were biased by inappropriate timing. Their first suggestion applies to few species, and its implementation alters photoperiodic cues. Their second point is valid, but our conclusions are robust: Observed genetic changes reflect global warming, not sampling artifacts.

1 Department of Genetics, Faculty of Biology, University of Barcelona, Diagonal 645, Barcelona 08071, Spain.
2 Department of Statistics, Faculty of Biology, University of Barcelona, Diagonal 645, Barcelona 08071, Spain.
3 Department of Biology, Box 351800, University of Washington, Seattle, WA 98195–1800, USA.
4 Department of Biology, Box 8795, College of William and Mary, Williamsburg, VA 23187–8795, USA.

* To whom correspondence should be addressed. E-mail: jbalanya{at}ub.edu

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Science. ISSN 0036-8075 (print), 1095-9203 (online)