220_Lecture_Population_Ecology_ I...

220_Lecture_Population_Ecology_ I... - Population Ecology...

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Population Ecology: Population Dynamics LAND/SOCR 220
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I. Population ecology pul ti n up f indi idu ls Population = group of individuals of the same species living in the same place at the same time • What factors affect the number of individuals in one species in one place? – age distribution ? – rates of birth and death ? opulation growth ? – population growth ?
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What is population structure? •P o pulation: individuals of a species within a given area • Populations are dynamic. Patterns give us sight into birth death movement etc insight into birth, death, movement, etc. • “Structure” is a non-random pattern in the population. Can provide info about how the population works • Three types of population structure: patial spatial –tempo ra
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patial population structure Spatial population structure • Habitats are a mosaic of patches that vary in quality • Populations are divided into sub-populations • By definition, organisms are not likely to leave their sub-population • Collections of sub-populations called “meta-populations” tudies of spatial distribution of populations Studies of spatial distribution of populations is also called “Landscape Ecology” • Three types of dispersion of individuals in space
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Evenly spaced distribution: ompetition for water competition for water
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Clumped distribution: egetative reproduction of aspen vegetative reproduction of aspen
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patial dispersion patterns Spatial dispersion patterns
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Individual perception drives spatial dispersion patterns cy frequen c Distance to nearest neighbor f
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This note was uploaded on 02/26/2008 for the course SOCR 220 taught by Professor Kelly,martin during the Fall '07 term at Colorado State.

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220_Lecture_Population_Ecology_ I... - Population Ecology...

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