Stoichiometry and population dynamics

Stoichiometry and population dynamics

Tom Andersen,* James J. Elser and Dag O. Hessen Department of Biology, University of Oslo, P.O. Box 1066, Blindern, 0316 Oslo, Norway School of Life Sciences, Arizona State University, Tempe, AZ 85287, USA *Correspondence: E-mail: [email protected] Abstract Population dynamics theory forms the quantitative core from which most ecologists have developed their intuition about how species in...

Stoichiometry and food-chain dynamics.

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...

Acetylation dynamics and stoichiometry in Saccharomyces cerevisiae

Lysine acetylation is a frequently occurring posttranslational modification; however, little is known about the origin and regulation of most sites. Here we used quantitative mass spectrometry to analyze acetylation dynamics and stoichiometry in Saccharomyces cerevisiae. We found that acetylation accumulated in growth-arrested cells in a manner that depended on acetyl-CoA generation in distinct...

Stoichiometry Of Tumor Dynamics: Models And Analysis

Stochastic functional population dynamics with jumps

In this paper we use a class of stochastic functional Kolmogorov-type model with jumps to describe the evolutions of population dynamics. By constructing a special Lyapunov function, we show that the stochastic functional differential equation associated with our model admits a unique global solution in the positive orthant, and, by the exponential martingale inequality with jumps, we dis...