Interactions of dissolved and particulate nitrogen in lake metabolism
- 1 January 1971
- report
- Published by Office of Scientific and Technical Information (OSTI)
Abstract
The first objective of this work was to relate changes in inorganic nitrogen concentrations and standing stocks of sestonic organic nitrogen to understand how these two parameters relate to production of organic nitrogen. Two lakes representing extremes of hardwater productivity were sampled weekly for over one year to compare rates of allochthonous nitrogen entry, rates of nitrogen regeneration and organic nitrogen production in each lake. Nitrogen content of net- and nannoseston size fractions (Hutchinson, 1967:235) were determined to see whether nannoplankton was responsible for more organic nitrogen production than the netplankton. Lastly, analytical techniques were developed to quantify changes in dissolved organic nitrogen (DON) in natural waters (Manny, Miller and Wetzel, 1971) because cyclic changes in dissolved organic matter (DOM) are intimately related to mechanisms regulating rates of energy and materials transfer in lake metabolism and eutrophication (Wetzel, 1965, 1966, 1967, 1969, 1970; Wetzel and Allen, 1971).Keywords
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