LECTURE 11 (1) - LECTURE 11 POPULATION ECOLOGY LEARNING...

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LECTURE 11 POPULATION ECOLOGY
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LEARNING OBJECTIVES To define population. To describe the growth patterns of population and the limitation factors of population growth and how it affects the growth of population To know the effect of human population growth on economic development.
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LEARNING OUTCOMES At the end of the lecture, students will be able to: Define population by describing population growth in terms of population size, density, distribution and number of individuals in different age groups. Comprehend the patterns of population growth; exponential, zero and negative. Describe the limitation factors to population growth such as resource availability, disease and predation and how it associated with the three survivorship curves Discuss the factors regarding population growth and the problems associated with it.
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CHARACTERISTICS OF POPULATIONS   POPULATION: a group of individuals of the same species occupying a given area. Each has its own gene pool, size, density, distribution and number of individuals. DEMOGRAPHICS: Characteristics of population in terms of size, density, distribution and age structure and ranges in heritable traits. vital statistics of a population. POPULATION SIZE: number of individuals that contribute to a population’s gene pool.
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POPULATIONS……. AGE STRUCTURE: The number of individuals in each of the several age categories Pre-reproductive, reproductive and post- reproductive Pre-reproductive and reproductive make up the reproductive base
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POPULATIONS…. POPULATION DENSITY: number of individuals in some specified area/volume of a habitat. Habitat? POPULATION DISTRIBUTION: general pattern in which a population’s individuals are dispersed in a specified area. Species occupying the same area – compete; help to shape population’s density and dispersion in a habitat. Different number of individuals in different environment.
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POPULATION DISTRIBUTION   3 distribution patterns: RANDOM CLUMPED UNIFORM.
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Uniform: individuals evenly spaced. (e.g. fruit trees in an orchard); relatively rare in nature Random: habitat conditions are nearly uniform, resource availability is fairly steady; extremely rare in nature. Clumped:
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This note was uploaded on 06/21/2009 for the course BIO 150 taught by Professor Kore during the Spring '08 term at Abraham Baldwin Agricultural College.

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LECTURE 11 (1) - LECTURE 11 POPULATION ECOLOGY LEARNING...

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