Random: The rarest dispersion pattern is random because resources in nature are rarely randomly spaced.

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#Unit 10. Ecological Principles

Type of iteroparity

Seasonal iteroparity - have distinct breeding seasons 

Continuous iteroparity- reproduce at any time of the year. 

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#Unit 10. Ecological Principles

If the environment is stable - Selection favors a single act of reproduction.

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#Unit 10. Ecological Principles

r-selected species

High rate of per capita population growth

poor  competitive ability

Grows quickly 

age early, 

devoting much energy to producing  large number of progeny 

Small in size, and individuals do not live long. 

Random matting

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#Unit 10. Ecological Principles

Grime’s triangle

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#Unit 10. Ecological Principles

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#Id: 8438

#Unit 10. Ecological Principles

Where conditions for plant growth are less stressful, plants can evolve life history traits that fall along a continuum from competitors to ruderals.