# Dynamic energy and mass budgets in biological systems

## S.A.L.M. Kooijman (Author of Dynamic Energy and Mass Budgets in Biological Systems)

## Ecotoxicology, population dynamics and stoichiometry within dynamic energy budget theory

## Dynamic energy and mass budgets in biological systems

Journal of Mathematical Biology. We formulate and analyze two dynamic energy budget models, a net assimilation model with constant allocation strategy and a net production model with a 2-stage allocation strategy, with the objective of determining strategies that maximize the expected lifetime reproductive energy. In the analysis of the net production model, the size at maturity is calculated along with the probability of reaching that size. We show that a small probability of survival to maturity is incompatible with the simple assumption of an exponential survival probability. We demonstrate that when the hazard rate is significantly greater for small individuals than large ones, it is possible for the optimum strategy to be for an individual to grow to a large size in spite of an arbitrarily small probability of survival to maturity. Numerical simulations indicate how the optimal allocation strategies depend on the parameter values.

We present a Dynamic Energy Budget DEB model for the quintessential keystone predator, the rocky-intertidal sea star Pisaster ochraceus. Based on first principles, DEB theory is used to illuminate underlying physiological processes maintenance, growth, development, and reproduction , thus providing a framework to predict individual-level responses to environmental change. We parameterized the model for P. We further validated the model using an independent growth data set. Using standard statistics to compare model outputs with real data e. Interestingly, the model revealed that P.

Cambridge Core - Ecology and Conservation - Dynamic Energy and Mass Budgets in Biological Systems - by S. A. L. M. Kooijman.

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From the reviews of the first edition: 'The Dynamic Energy Budget approach is refreshing, solidly grounded in biological data, supplemented with dramatic, well motivated theoretical concepts. This book is an excellent scientific product that informs and forces contemplation of issues relating to population and community ecology., The system can't perform the operation now.

The dynamic energy budget DEB theory is a formal metabolic theory which provides a single quantitative framework to dynamically describe the aspects of metabolism energy and mass budgets of all living organisms at the individual level, based on assumptions about energy uptake, storage, and utilization of various substances. The theory is contributing to the theoretical underpinning of the emerging field of metabolic ecology. The explicitness of the assumptions and the resulting predictions enable testing against a wide variety of experimental results at the various levels of biological organization. The theory presents simple mechanistic rules that describe the uptake and allocation of energy and nutrients and the consequences for physiological organization throughout an organism's life cycle, including the relationships of energetics with aging and effects of toxicants. The theory specifies that an organism is made up two main compartments: energy reserve and structure.

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is broadened to encompass the fluxes of both energy and mass. (Dynamic Energy Budgets in Biological Systems - Theory and Applications in Ecotoxicol-.