Written critique is due in laboratory. You should be prepared to contribute to a discussion of the paper(s) during laboratory. Instructions for writing critique and preparing for discussion.  Printable instructions.

For week of 20 April. Singer, M.S., K.C. Mace, and E.A. Bernays. 2009. Self-medication as adaptive plasticity: Increased ingestion of plant toxins by parasitized caterpillars. Public Library of Science ONE 4: e4796.  Link to paper via Dartmouth network.  Commentary.  Home pages of Mike Singer, Elizabeth Bernays.  Note Cramer Seminar by Mike Singer, Friday 29 April 2011, Gilman 101, 4:00.

For week of 18 May. Willis, C. G., B. Ruhfel, R. B. Primack, A. J. Miller-Rushing, and C. C. Davis. 2008. Phylogenetic patterns of species loss in Thoreau's woods are driven by climate change. Proceedings of the National Academy of Sciences of the United States of America 105:17029-17033.  Link to paper via Dartmouth network.  Home pages of Charles Willis, Charles Davis, Richard Primack, Brad Ruhfel.

Related references. 
Primack, R. B., A. J. Miller-Rushing, and K. Dharaneeswaran. 2009. Changes in the flora of Thoreau's Concord. Biological Conservation 142:500-508.  Link.
Willis, C. G., B. R. Ruhfel, R. B. Primack, A. J. Miller-Rushing, J. B. Losos, and C. C. Davis. 2010. Favorable climate change response explains non-native species' success in Thoreau's woods. Plos One 5: e8878    Link.

For week of 25 May.  Clark, D. A., Piper, S. C., Keeling, C. D. and Clark, D. B. 2003. Tropical rain forest tree growth and atmospheric carbon dynamics linked to interannual temperature variation during 1984-2000.  Proc. Natl. Acad. Sci. USA 100: 5852-5857. Link via Dartmouth network.  Related papers and resources.