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Diurnal changes in dissolved organic and inorganic carbon and nitrogen in a hardwater stream
Author(s) -
MANNY B. A.,
WETZEL R. G.
Publication year - 1973
Publication title -
freshwater biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.297
H-Index - 156
eISSN - 1365-2427
pISSN - 0046-5070
DOI - 10.1111/j.1365-2427.1973.tb00060.x
Subject(s) - dissolved organic carbon , environmental science , residence time (fluid dynamics) , nitrogen , environmental chemistry , total organic carbon , carbon fibers , hydrology (agriculture) , organic matter , streams , water quality , total dissolved solids , chemistry , ecology , environmental engineering , biology , geology , computer network , materials science , geotechnical engineering , organic chemistry , composite number , computer science , composite material
Summary Organic and inorganic carbon and nitrogen parameters were sampled simultaneously at 6 h intervals over a diurnal period at seven stations in a small hardwater stream in southern Michigan. Concentrations and budget values (kg/day) varied up to 10‐fold at individual stations and between stations. The most constant parameters were total dissolved organic carbon and nitrogen. The most variable parameter was particulate organic carbon. Significant changes were noted in all parameters as the stream passed through different stream‐side habitats. Budget values facilitated interpretation of these changes over time between stations. High variability in the concentration values was introduced by large allochthonous inputs of dissolved organic matter (DOM) and water alternately adding to or diluting parameters. Distance from upstream terrestrial DOM sources, DOM residence time, the pulsed nature of DOM inputs and biological utilization of DOM have important effects on the quality and quantity of DOM that enters recipient lakes and rivers. The importance of ground‐water flux and DOM content is stressed. The DOM input and turnover within hardwater streams appears t o be in rapid, dynamic equilibrium.