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About the Cover


The parasitic ciliate Lambornella clarki, flanked by free-living protozoa and surrounded by larvae and pupae of its mosquito host, Aedes sierrensis. The impact of fatal L. clarki infections on host populations in treeholes varies with food availability and can result in greater host abundance and fecundity when resources are scarce. See page 185. [Illustration by Jan O. Washburn; color tinting by Julie Cherry]


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