Some biological invasions can result in algae blooms in the nearshore of clear lakes. We studied if an invasive crayfish ( Pacifastacus leniusculus ) modified the biomass and community composition of benthic macroinvertebrates and therefore led to a trophic cascade resulting in increased periphyton biomass, elevated littoral primary productivity, and benthic algae bloom in a lake with remarkable transparency [Crater Lake, Oreg...