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Population Models for Carbonate Workbench

Population Models for Carbonate Workbench. Static Environmental context – productivity Dynamic Population context – community linkages Basic / inefficient Optimized. Scoping. Volterra-Lotke. Simplest: Intrinsic rates of increase of prey:a, density related

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Population Models for Carbonate Workbench

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  1. Population Models for Carbonate Workbench • Static Environmental context – productivity • Dynamic Population context – community linkages • Basic / inefficient • Optimized Scoping

  2. Volterra-Lotke • Simplest: • Intrinsic rates of increase of prey:a, density related • Predation rates:b, conversion:c to prey offspring, density- related • Mortalities:m • & Environmental homogeneity (hiding places) • & Competition H, herbivore population C, Consumer population • Practical: • Numerical solutions • Limits to complexity H C

  3. Ecopath • Production = catch + predation + net migration + biomass accumulation + other mortality • Consumption = production + respiration + unassimilated food Parameters needed (raw or estimated): biomass, production/biomass ratio (or total mortality), consumption/biomass ratio, and ecotrophic efficiency for each of the functional groups in a model

  4. Path Model Trophic energy flows => population and growth rates Lots of information from ecologists, reef studies, carbon biogeochemists We can use guilds (as zoologists do) for palaeo-communities • For example: • Trophic web • Sessile / vagrant • Soft / Skeletonized • Hetero- / Autotroph • R/K strategies • Feeding scales • Grazing/Filter/Predator • Framework / Encrusting / Interstitial

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