Effects of acidity on fish communities in southwestern Québec (Canada)

摘要: Surveys of fish populations were conducted on 74 lakes the Outaouais hydrographic region during summers 1985 and 1986 to assess potential impact acidity ichtyologic fauna. Results show that species diversity declined with increasing acidity. The color water does not seem mitigate adverse effects On contrary, number decreased similarly in both brown lakess (>30 Hazen) clear (≤30 increase tolerance threshold levels 72% are no longer captured when pH reaches 5.0, compared 32% at ≤5.5. range 5.0 5.5 can possibly be regarded as break point for occurrence most this area. Analysis size frequency distributions recruitment failures have occurred acidic waters walleye lake trout. We estimated anthropogenic acidification is responsible loss more than 10000