Chapter 51 Notes-A5.4

Chapter 51 Notes-A5.4 - Group A5.4 Week 09/14/09-09/18/09...

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Group A5.4 Week 09/14/09-09/18/09 Chapter 52: Ecology and Biosphere Ecology is the scientific study of the interactions between organisms and the environment o determines distribution of organisms and their abundance Organisms and Environment : Affected by four variables: Dispersal and Distribution, Behavior, Biotic/Abiotic Factors, Climate Subfields of Ecology: Organismal Ecology - studies how an organism's structure, physiology and for animals, behavior meets environment Population ecology focuses on factors affecting how many individuals of a species live in an area o populatio n is a group of individuals of the same species living in an area Community ecology deals with the whole array of interacting species in a community o community is a group of populations of different species in an area Dispersal and Distribution: Dispersal is the movement of individuals away from centers of high population density or from their area of origin o demonstrated when populations move to areas they did not exist before species transplants used to determine if dispersal is factor to influence distribution of a population (explains why species are found in a specific region -successful if potential range of species s larger than its actual range - organisms do not occupy all of their potential range (limited by habitat selection behavior) Behavior and Habitat Selection: o Some organisms do not occupy all of their potential range o when individuals avoid certain habitats, distribution becomes limited Biotic Factors Limited by: Predation Competition Abiotic Factor: Limited by:
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Group A5.4 Week 09/14/09-09/18/09 Temperature Water Sunlight Wind Rocks and Soils Climate: climate patterns determined by input of solar energy and Earth's rotation around the sun affected by abiotic factors, temperature, mountains, bodies of water, changing angle of sun microclimate-very fine patterns macroclimate-patterns on global, regional, local levels Biomes: Biomes are the major ecological associations that occupy broad geographic regions of land or water Aquatic Biomes o largest part of the biosphere in terms of area and stratified with light penetration, temperature, and community structure. o The upper photic zone has sufficient light for photosynthesis while the lower aphotic zone receives little light o The organic and inorganic sediment at the bottom of all aquatic zones is called the benthic zone o The communities of organisms in the benthic zone are collectively called the
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This note was uploaded on 01/25/2011 for the course BIO 1510 taught by Professor Unknown during the Spring '07 term at Georgia Tech.

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Chapter 51 Notes-A5.4 - Group A5.4 Week 09/14/09-09/18/09...

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