“Boom of invasive crayfish threaten species in Oregon’s Crater Lake,” broadcast on the Public Broadcasting System’s (PBS) “NewsHour” on January 2, 2016, explores the impacts of the invasive Signal Crayfish (Pacifastacus leniusculus) on the aquatic ecosystem in Crater Lake in Oregon, particularly the effects on the rare Mazama Newt (Taricha granulosa mazamae), an amphibian found only in Crater Lake. The story provides an informative case study of how invasive aquatic species get introduced and become established and problematic in new water bodies. The 5 minute/30 second video report is available online at http://www.pbs.org/newshour/bb/boom-of-invasive-crayfish-threaten-species-in-oregons-crater-lake/.
More information on the Mazama Newt is available from the National Park Service online at http://www.nps.gov/crla/learn/nature/craterlakenewt.htm.
More information on the Signal Crayfish is available from the U.S. Fish and Wildlife Service online (as PDF) at http://www.fws.gov/fisheries/ANS/erss/highrisk/Pacifastacus-leniusculus-ERSS-revision-June2015.pdf.