Dynamics of dissolved organic nitrogen in subalpine Castle Lake, California

J. P. Zehr; S. G. Paulsen; R. P. Axler; C. R. Goldman

doi:10.1007/BF00008808

Dynamics of dissolved organic nitrogen in subalpine Castle Lake, California

J. P. Zehr, S. G. Paulsen, R. P. Axler, C. R. Goldman

Natural Resources Research Institute

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17 Scopus citations

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.

Original language	English (US)
Pages (from-to)	33-45
Number of pages	13
Journal	Hydrobiologia
Volume	157
Issue number	1
DOIs	https://doi.org/10.1007/BF00008808
State	Published - Jan 1988

Keywords

dissolved organic matter
nitrogen cycling
subalpine lake

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10.1007/BF00008808

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title = "Dynamics of dissolved organic nitrogen in subalpine Castle Lake, California",

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.",

keywords = "dissolved organic matter, nitrogen cycling, subalpine lake",

author = "Zehr, {J. P.} and Paulsen, {S. G.} and Axler, {R. P.} and Goldman, {C. R.}",

year = "1988",

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language = "English (US)",

volume = "157",

pages = "33--45",

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TY - JOUR

T1 - Dynamics of dissolved organic nitrogen in subalpine Castle Lake, California

AU - Zehr, J. P.

AU - Paulsen, S. G.

AU - Axler, R. P.

AU - Goldman, C. R.

PY - 1988/1

Y1 - 1988/1

N2 - 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.

AB - 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.

KW - dissolved organic matter

KW - nitrogen cycling

KW - subalpine lake

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JO - Hydrobiologia

JF - Hydrobiologia

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ER -

Dynamics of dissolved organic nitrogen in subalpine Castle Lake, California

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