North American Fruit Explorers mailing list at ibiblio

["Thomas Olenio" <tolenio@sentex.net>]

http://www.epa.gov/airmarkets/acidrain/effects/surfacewater.html

"Some types of plants and animals are able to tolerate acidic waters.  
Others, however, are acid-sensitive and will be lost as the pH declines.  
Generally, the young of most species are more sensitive to environmental  
conditions than adults. At pH 5, most fish eggs cannot hatch. At lower pH  
levels, some adult fish die. Some acid lakes have no fish. The chart below  
shows that not all fish, shellfish, or the insects that they eat can  
tolerate the same amount of acid; for example, frogs can tolerate water  
that is more acidic (has lower pH) than trout"

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