. Effects of acid deposition on the emergence of blackflies (Diptera: Simuliidae) over 50 years from Algonquin Park streams . cs <D GL (0 0) 10 1 f- + -D- CCI O CC2 * * ' ' ' ' â ' I ......... I ... I o100000 ^ 10000 SI I 1000 c 100 10 11- 1940 1950 1960 1970 1980 MUD CREEK o o ^r â¢\ w

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