ISSN:
1573-5117
Keywords:
dissolved organic matter
;
nitrogen cycling
;
subalpine lake
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract Dissolved organic nitrogen (DON) concentrations were measured in meso-oligotrophic Castle Lake, California during the ice-free season in 1982, 1983 and 1984. No consistent relationships were found between DON and particulate-N, primary productivity rates or chlorophyll concentrations. However, increases in DON concentrations were observed in the early growing season of 1982 and 1984 when water temperature was rising and a diatom bloom was senescing. DON increased at a high rate (0.31 mg atom N m−3 day−1), and then rapidly disappeared. Sediment released appared to be the most important source of DON. Dissolved free amino acids were always less than 7.5% of the DON pool, and did not vary in the composition of specific amino acids during the growing season.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00008808
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