Roles of crayfish: Consequences of predation and bioturbation for stream invertebrates

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Niche differentiation among invasive crayfish and their impacts on ecosystem structure and functioning (2014, background): “There was also variation in the impact of invasive crayfish species on Dipteran larvae; abundance was reduced in the presence of signal and virile crayfish only, suggesting direct consumption had a larger effect than the positive effect of sediment sorting by crayfish (Usio and Townsend, 2004).”
Short-term effects of a prolonged blackwater event on aquatic fauna in the Murray River, Australia: considerations for future events (2012, background): “The sudden and potentially large loss of small crustaceans that function as detrivores and/or shredders and are an important prey source for many large-bodied fish, may have cascading effects into the wider ecosystem (e.g. Carpenter and Kitchell 1993; Usio and Townsend 2004).”
Effects of common carp on nutrient dynamics and littoral community composition: roles of excretion and bioturbation (2007, background): “In addition, many aquatic animals such as fish and invertebrates physically disturb sediments through feeding, walking and/or burrowing activities, a process known as bioturbation (Fukuhara & Sakamoto 1987, Pringle & Blake 1994, Flecker 1996, Moore et al. 2004, Usio & Townsend 2004).”