Download or read book Ecosystem Effects of Rainbow Smelt (Osmerus Mordax) Invasions in Inland Lakes written by Rebekah C. Rooney and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Rainbow smelt (Osmerus mordax) have invaded many North American inland lakes, and their distribution continues to expand. Their broad dietary and habitat tolerances permit smelt to interact with numerous trophic levels, including zooplankton, planktivores, benthivores, and piscivores. Major concerns include the potential for rainbow smelt to extirpate native planktivores through a combination of competition and predation, their potential to weaken sport and commercial fisheries through competition and predation on juvenile game fish, and their potential to produce a trophic cascade that accelerates eutrophication. Enhancing adult piscivore populations has proven effective at reducing smelt populations; however, preventing smelt invasion is the preferred management strategy. Accidental and deliberate introduction by humans has been the primary mode of smelt range expansion, thus programs should be aimed at increasing public awareness of the risks of smelt invasion. Future research should examine multiple scales and should include both pelagic and benthic components because smelt have the potential to impact ecosystems at all levels. Recently developed models that forecast smelt distribution should be combined with current distributional data to help managers prioritize lakes at a greater risk of invasion. Investigation into the interaction between smelt invasion, climate change, and expanding human settlements is also necessary.