Comment on ?A protocol for determining lake acidification?

EdwardC. Krug; WalterL. Warnick

doi:10.1007/bf00284793

Early Biotic Responses to Advancing Lake Acidification (Volume 6 of the Acid Precipitation Series)

Journal of Environmental Quality ◽

10.2134/jeq1985.00472425001400030032x ◽

1985 ◽

Vol 14 (3) ◽

pp. 457-457

Author(s):

Murray G. Johnson

Keyword(s):

Acid Precipitation ◽

Lake Acidification ◽

Precipitation Series

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Lake acidification and the distribution of males and females of a planktonic copepod

SIL Proceedings 1922-2010 ◽

10.1080/03680770.2001.11901866 ◽

2002 ◽

Vol 28 (2) ◽

pp. 992-995

Author(s):

Jan-Erik Svensson ◽

Ragnar Lagergren ◽

Jan A. E. Stenson

Keyword(s):

Lake Acidification ◽

Planktonic Copepod ◽

Males And Females

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Teratogenesis in Lake Trout (Salvelinus namaycush) in an Experimentally Acidified Lake

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/f80-282 ◽

1980 ◽

Vol 37 (12) ◽

pp. 2355-2358 ◽

Cited By ~ 22

Author(s):

L. A. Kennedy

Keyword(s):

Lake Trout ◽

Indigenous Population ◽

Dry Weight ◽

Salvelinus Namaycush ◽

Embryonic Mortality ◽

Lake Acidification ◽

Mortality And Morbidity ◽

Acid Lake ◽

Untreated Water

Embryonic mortality and morbidity were seen in an indigenous population of lake trout (Salvelinus namaycush) inhabiting a lake experimentally acidified over a period of 3 yr to a mean summer epilimnion pH of 5.84. The pH of the hypolimnetic zone where trout spend the summer and undergo gametogenesis was 6.2. Although fertilization appeared to be successful, 59% of eggs incubated in the acidified lake had died or failed to gastrulate by 15 d, and 60% of the surviving embryos displayed gross anatomical malformations. Prior to hatching only 6% of the eggs contained embryos and all were anomalous. In a control lake, 92.9% of eggs contained normal embryos prior to hatching. Both the volume and dry weight of eggs of fish inhabiting the acidified lake were significantly less than eggs from the control lake. When gametogenesis and fertilization occurred in the acid lake but embryogenesis occurred in untreated water in the laboratory, there was a 50% reduction in the viability of eggs of one fish by day 31, compared to controls.Key words: lake acidification, teratogenesis, lake trout

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