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BIOA02H3 (153)
Chapter 54

Chapter 54: Population Ecology -- KEY TERMS & DEFINITIONS

3 Pages
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Department
Biological Sciences
Course Code
BIOA02H3
Professor
Kamini Persaud

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Key TermsChapter 54: Population Ecology
54.1-How do ecologists study populations?
-population: consists of individuals of a species within a given area
-population structure: the age distribution of individuals in a population and the
way those individuals are spread over the environment
-population density: the number of individuals of a population per unit of area (or
volume)
-demographic events: births, deaths , immigration, and emigration
-most field studies of animal populations require tagging or marking individuals in
some one
omicrochips
omolecular markersused to determine movement of individuals over long
distances
ostatistical methods (capture-mark-recapture method)
-cohort: group of individuals born at the same time
-survivorship: the number of individuals still alive at a later date (of a cohort)
-life tables are used to predict future trends in populations
54.2-How do ecological conditions affect life histories?
-Life history: describes how organisms allocate their time and energy among the
various activities that occupy its life.
-Ecologists study life histories because they influence how populations grow and are
distributed
-Ecological interactions influence the evolution of life histories
54.3-What factors influence population densities?
-Exponential growth: continuous upward growth
-Intrinsic rate of increase: the rate at which the population would grow under
optimal conditions
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Description
Key TermsChapter 54: Population Ecology 54.1-How do ecologists study populations? - population: consists of individuals of a species within a given area - population structure: the age distribution of individuals in a population and the way those individuals are spread over the environment - population density: the number of individuals of a population per unit of area (or volume) - demographic events: births, deaths , immigration, and emigration - most field studies of animal populations require tagging or marking individuals in some one o microchips o molecular markersused to determine movement of individuals over long distances o statistical methods (capture-mark-recapture method) - cohort: group of individua
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