
Cover image: Shown is a developing wood frog tadpole. The rapid increase in prevalence of amphibian limb deformities in recent decades is hypothesized to be the result of either chemical contaminants in the water supply or trematode parasite infection. Kiesecker presents the results of field and laboratory experiments that link increased trematode infection and limb deformities to pesticide-mediated immune suppression. See article by Kiesecker on pages 9900–9904.