See our new lab publication, just released:  Eco-Evolutionary Feedbacks Predict the Time Course of Rapid Life-History Evolution.  American Naturalist 194: 671-692.  DOI: 10.1086/705380.
    This work is part of our ongoing experimental study of the interactions between ecology and evolution in natural environments.  We extended the range of guppies over barrier waterfalls that had excluded them from headwaters and have followed their population growth with monthly mark-recapture plus monitored their impacts on the only other resident fish species and the ecosystem.  We assayed life history evolution (male age and size at maturity) with common garden experiments executed every year for the first four years after the introduction.  We observed a lag in when male traits evolved that corresponds to the onset of density regulation.

    Joshua Goldberg successfully defended his PhD yesterday - Thursday, October 10.  His thesis title is:  "Population, spatial and temporal structure in the development of a stream community".   It was a series of studies of the interaction between guppies and the killifish, Rivulus hartii as guppies invade a headwater stream where killifish were the only prior resident.  The three chapters were:  1) artificial stream experiments that detailed the nature of their interaction, 2) mark-recapture studies of killifish where guppies were introduced, in comparison with an upstream control from which guppies had been excluded by a barrrier waterfall, and 3) how these interactions "matured" over time in longer term introduction experiments (30+ years) and natural communities with both species present.
     It was a great presentation. We are all very proud of him and happy with the outcome. 
     Joshua will soon return to Bhutan to study tigers and leopards!
Congratulations Joshua!!!