Dynamic Energy Budgets in Biological Systems

Dynamic energy budget theory provides simple, mechanistic rules for the uptake ans use of energy by those animals, fungi and micro-organisms that require organic food substances in the diet. The implications of these rules for physiological organisations and population dynamics are considered.

Predictions of the theory are tested against a wide variety of experimental results. The theory explains body-size scaling relationships such as the links between food intake and life span. In a concluding chapter, the theory is applied to problems in ecotoxocology, to demonstrate the ability of the model to extrapolate from laboratory to field.

Each topic is given a general introduction, followed by formulation of the theory in elementary mathematical terms. Methodology aspects of mathematical modelling are discussed in detail. Biologists and mathematicans with a broad interest in fundamental and applied problems in biology will find this book of great interest.

Summary of Contents

1) Energetics and Models

The position of energetics in the biological sciences; historical setting; the methology of modelling and the philosophical status of biological theories

2) Individuals

A systems theory view of individuals; the significance of isomorphism and homeostasis in the light of surface area vs volume relationships; critical evaluation of measures for size, storage and energy; effects of temperature

3) Energy acquisition and use

A step by step discussion of mechanisms of energy uptake and use by individuals with relevance to the DEB model

4) Analysis of the DEB modeL

Summary of the model; Evaluation of its consequences for the behaviour of individuals under a variety of circumstances

5) Living together

Evaluation of the consequences of the DEB model for populations and communities; a discussion of additional processes operating at the population level

6) Comparison of Species

Body size scaling relationships; strategies of parameter selection; evolutionary implications

7) Suborganismal Organization

Relationships between the DEB model and models for digestion, allometric growth of parts, protein synthesis and RNA turnover

8) Ecotoxicity

Uptake kinetics and the relationship with effects; the relationship between effects on individuals and on populations

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