Southern-Summer School on Mathematical Biology

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2017:courses:deross:start

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2017:courses:deross:start [2017/01/16 12:26] – created prado2017:courses:deross:start [2024/01/09 18:45] (current) – external edit 127.0.0.1
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 Subsequently, I will discuss how physiologically structured population models have been used to develop novel and counterintuitive ecological theory about the population and community effects of ontogenetic development. Growth in body size is by far the most prominent aspect of the ontogenetic development that every individual goes through during its life history. Necessarily, development depends on the availability of food and thus indirectly on the feedback from population foraging. I will show that population models accounting for food-dependent growth in body size of individuals make predictions that are in line with the classical unstructured theory about population and community dynamics, only in case of ontogenetic symmetry in energetics, meaning that development and reproduction are limited to the same extent by food availability. In contrast, in case of ontogenetic asymmetry in energetics, when either development or reproduction is more food-limited than the other process, models that account for food-dependent development make different and counter-intuitive predictions, as it may, for example, result in positive relationships between population biomass and individual mortality. The body size effects on community structure are even more substantial when species have a complex life cycle and growth in body size hence leads to a change in resource use or habitat during ontogeny. I will provide an overview of possible consequences of ontogenetic development for community structure and show how they come about because the population size distribution changes with changes in the environmental conditions, like productivity or mortality. Subsequently, I will discuss how physiologically structured population models have been used to develop novel and counterintuitive ecological theory about the population and community effects of ontogenetic development. Growth in body size is by far the most prominent aspect of the ontogenetic development that every individual goes through during its life history. Necessarily, development depends on the availability of food and thus indirectly on the feedback from population foraging. I will show that population models accounting for food-dependent growth in body size of individuals make predictions that are in line with the classical unstructured theory about population and community dynamics, only in case of ontogenetic symmetry in energetics, meaning that development and reproduction are limited to the same extent by food availability. In contrast, in case of ontogenetic asymmetry in energetics, when either development or reproduction is more food-limited than the other process, models that account for food-dependent development make different and counter-intuitive predictions, as it may, for example, result in positive relationships between population biomass and individual mortality. The body size effects on community structure are even more substantial when species have a complex life cycle and growth in body size hence leads to a change in resource use or habitat during ontogeny. I will provide an overview of possible consequences of ontogenetic development for community structure and show how they come about because the population size distribution changes with changes in the environmental conditions, like productivity or mortality.
  
 +===== Handouts =====
  
 +  * {{:2017:courses:deross:amdr-lecture1.pdf|Lecture 1}}
 +  * {{:2017:courses:deross:amdr-lecture2.pdf|Lecture 2}}
 +  * {{:2017:courses:deross:amdr-lecture3.pdf|Lecture 3}}
 +  * {{:2017:courses:deross:amdr-lecture4.pdf|Lecture 4}}
2017/courses/deross/start.1484569566.txt.gz · Last modified: 2024/01/09 18:45 (external edit)