Nutrient cycling in a microflagellate food chain: I. Nitrogen dynamics
نویسندگان
چکیده
منابع مشابه
Nitrogen cycling and dynamics in a macrophyte-rich stream
1. A N-NH4 tracer release study was conducted in a macrophyte-rich stream, the River Lilleaa in Denmark. The objectives of the study were to compare uptake rates per unit area of NH4 by primary producers and consumers in macrophyte and non-macrophyte habitats, estimate wholestream uptake rates of NH4 and compare this to other stream types, and identify the pathways and estimate the rate at whic...
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Goal To determine the relative importance of different mechanisms that influence carbon loss from soil under variable soil-moisture conditions. The soil contains more carbon than the atmosphere and plants combined (Scurlock and Hall 1998). This carbon is important for maintaining soil fertility, controlling erosion, and the long-term storage of carbon that could be released into the atmosphere....
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Traditional models of chemostat systems looking at interactions between predator, prey and nutrients have used only a single currency, such as energy or nitrogen. In reality, growth of autotrophs and heterotrophs may be limited by various elements, e.g. carbon, nitrogen, phosphorous or iron. In this study we develop a dynamic energy budget model chemostat which has both carbon and nitrogen as c...
متن کاملModeling nutrient flows in the food chain of China.
Increasing nitrogen (N) and phosphorus (P) inputs have greatly contributed to the increasing food production in China during the last decades, but have also increased N and P losses to the environment. The pathways and magnitude of these losses are not well quantified. Here, we report on N and P use efficiencies and losses at a national scale in 2005, using the model NUFER (NUtrient flows in Fo...
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The asymptotic behavior of a tri-trophic food chain model in the chemostat is studied. The Monod-Herbert growth model is used for all trophic levels. The analysis is carried out numerically, by finding both local and global bifurcations of equilibria and of limit cycles with respect to two chemostat control parameters: the dilution rate of the chemostat and the concentration of input substrate....
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ژورنال
عنوان ژورنال: Marine Ecology Progress Series
سال: 1985
ISSN: 0171-8630,1616-1599
DOI: 10.3354/meps024231