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Arthur Weis

Professor, Department of Ecology and Evolutionary Biology

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Climate warming is changing the growing season in many parts of the world. In temperate areas frosts stop sooner in spring and start later in fall. In some arid areas, growing season contract with drought. These changes in the seasonal rhythms will alter the selective regimes acting on the genes that control when, and for how long, plants come into flower. When the shift from vegetative growth to reproduction occurs too early, plants have few resources to make progeny. When the shift is too late they do not have enough time to mature their progeny. My lab is using a quantitative genetic approach to investigate this trade-off in annual and short lived plants and to determine its impact on natural plant communities.