Digest: Parasite adaptation to light alters transmission and fecundity†.

Natural variation as well as human impacts can alter the light environment in lakes in ways that affect aquatic host-parasite interactions. In laboratory infection assays, Rogalski and Duffy (2020) determine that the bacterial parasite Pasteuria ramosa adapts to solar radiation by increasing its transmission potential to its zooplankton host, Daphnia dentifera. Local adaptation to light can allow P.