Two chloroplast proteins ferredoxin–thioredoxin reductase and thioredoxin regulate five pivotal enzymes within minutes of the

light–dark transition:

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#Unit 10. Ecological Principles

Growth rate of the prey in the presence of predators

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#Unit 10. Ecological Principles

Growth rate of the predators

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#Unit 10. Ecological Principles

Functional response The relationship between the density of prey and an individual predator’s rate of food consumption

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#Unit 10. Ecological Principles

A type I functional response, occurs when a predator’s rate of prey consumption increases linearly with an increase in prey density until the predator is satiated.

The type II functional response, occurs when the number of prey consumed slows as prey population density increases. 

In a type III functional response, prey consumption is low when prey population density is low, consumption is rapid when prey population density is moderate, and prey consumption slows when prey population density is high. 

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#Unit 10. Ecological Principles

The number of prey, N, increase at low predator densities, P, and decrease at high predator densities.

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#Unit 10. Ecological Principles

The prey zero isocline 

A specific number of predators will keep the prey population at zero growth.

P=r/s