Gene expression dynamics in randomly varying environments

Growth and extinction of populations in randomly varying environments

ESS germination strategies in randomly varying environments. II. Reciprocal Yield-Law models.

The study of ESS germination fractions in S. Ellner (1985, Theor. Pop. Biol. 27, 000-000) is applied and extended in the case of annuals obeying the Reciprocal Yield Law. The effects of parameter changes on the value of the ESS germination fraction are determined in some limiting cases by analyses of approximations. Numerical solutions of the ESS criterion are used to check the robustness of th...

ESS germination strategies in randomly varying environments. I. Logistic-type models.

ESS germination strategies are studied in a model of annual plant population dynamics in a randomly varying environment. The possible strategies are different values of the annual germination fraction G, either constant over time or varying in response to a "cue" correlated with upcoming environmental conditions. The model generalizes D. Cohen's model (1966, J. Theor. Biol. 12, 119-129; 1968, J...

A generalized tracking analysis of adaptive filtering algorithms in cyclicly and randomly varying environments

This paper derives new tracking results for adaptive filtering algorithms operating in the presence of two sources of nonstationarities: a carrier frequency offset and random variat.ions. Both impairments are common in digital communications due t,o variations in channel characteristics and to mismatches between transmitter and receiver carrier generators.

Robustness of Optimal Metabolic Performance by Optimal Gene Expression in Varying Environments

To understand the principles of the remarkable adaptivity of metabolic networks in dynamic environments, their underlying gene regulatory networks need to be characterised. Typically, little is known about the kinetics and topology of those gene networks in contrast to the metabolic networks that they regulate. Here, we present a theoretical approach based on metabolic control analysis to eluci...