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Additionally, here is the link to a well written synopsis of how the introduction of opossum shrimp (Mysis diluviana) led to a trophic cascade in the Flathead Lake ecosystem. IMHO, a case of good initiative, bad judgement:http://mtprof.msun.edu/Fall2012/ellis.html
Great article!The TL;DR version for those that don't want to read it is...Lake trout were present for 80 years present to the mysis, in low numbers. Shrimp show up providing an abundant food source. Macs multiply, eat more salmon. Salmon go away.