Thousands of fish populations and perhaps millions of invertebrate populations from CanadaâEUR(TM)s boreal region alone have been lost as a result of acid precipitation (Schindler, 1998). ###>Dans la seule rÃ©gion borÃ©ale du Canada, des milliers de populations de poissons et probablement des millions de populations dâEUR(TM)invertÃ©brÃ©s sont disparues (Schindler, 1998).