Description
Most organisms show substantial changes in size or morphology after they become independent of their parents and have to find their own food. Furthermore, the rate at which these changes occur generally depends on the amount of food they ingest. In this book, André de Roos and Lennart Persson advance a synthetic and individual-based theory of the effects of this plastic ontogenetic development on the dynamics of populations and communities.
De Roos and Persson show how the effects of ontogenetic development on ecological dynamics critically depend on the efficiency with which differently sized individuals convert food into new biomass. Differences in this efficiency--or ontogenetic asymmetry--lead to bottlenecks in and thus population regulation by either maturation or reproduction. De Roos and Persson investigate the community consequences of these bottlenecks for trophic configurations that vary in the number and type of interacting species and in the degree of ontogenetic niche shifts exhibited by their individuals. They also demonstrate how insights into the effects of maturation and reproduction limitation on community equilibrium carry over to the dynamics of size-structured populations and give rise to different types of cohort-driven cycles.
Featuring numerous examples and tests of modeling predictions, this book provides a pioneering and extensive theoretical and empirical treatment of the ecology of ontogenetic growth and d
Chapter
Asymmetry and Life History Effects
More Complicated Life Histories
Ontogenetic Symmetry and Biomass Overcompensation
4. Emergent Allee Effects through Biomass Overcompensation
Emergent Allee Effects in Stage-Structured Biomass Models
Emergent Allee Effects in the Kooijman-Metz Model
Size-Structured Predators Foraging on Size-Structured Prey
Empirical Evidence for Emergent Allee Effects
5. Emergent Facilitation among Predators on Size-Structured Prey
Generalists Facilitating Specialist Predators
Facilitation between Specialist Predators
Multiple Predators and a Single Prey
6. Ontogenetic Niche Shifts
Consumer-Resource Systems
Consequences for Higher Trophic Levels
Ontogenetic Niche Shifts in Predator Life History
Niche Overlap between Stage-Structured Prey and Predators
Niche Overlap between Size-Structured Prey and Predators
8. Ontogenetic Niche Shifts, Predators, and Coexistence among Consumer Species
Ontogenetic Niche Shifts and Interspecific Competition
Ontogenetic Niche Shifts in Both Consumers
Effects of Predators on Coexistence of Consumers
PART III: ONTOGENETIC DEVELOPMENT AND COMMUNITY DYNAMICS
9. Dynamics of Consumer-Resource Systems
A Size-Structured Population Model
Other Size-Dependent Consumer-Resource Dynamics
Daphnia-Algae as a Model System for the Study of Stage-Structured Dynamics
10. Dynamics of Consumer-Resource Systems with Discrete Reproduction: Multiple Resources and Confronting Model Predictions with Empirical Data
Overall Model Characteristics
Derivation of Individual-Level Model
The Model at the Population Level
Critical Resource Density and Cohort Dynamics
Multiple Resources and Ontogenetic Niche Shifts
Model Predictions and Empirical Data
11. Cannibalism in Size-Structured Systems
A Discrete-Continuous Model for Cannibalism
Effects of Harvesting Cannibalistic Populations
Giant Individuals: Theory and Observation
PART IV: EXTENSIONS AND PERSPECTIVES
12. Demand-Driven Systems, Model Hierarchies, and Ontogenetic Asymmetry
Model Hierarchies, Model Simplifications, and Model Testing
Development versus Reproduction Control: Ontogenetic Asymmetry
1 Basic Size-Structured Population Model
2 Derivation of the Yodzis and Innes Model
3 Derivation of the Stage-Structured Biomass Model
4 Equilibrium Computations for Physiologically Structured Models
5 Computing Parameter Bounds to Overcompensation in the Stage-Structured Bioenergetics Model
6 Ontogenetic Symmetry and Asymmetry in Energetics
7 Mechanisms Leading to Biomass Overcompensation
8 Discrete-Continuous Consumer-Resource Models
9 A Demand-Driven Energy Budget Model