BIO 122 - BIO 122 TEST 3 LECTURE 14 Understand the...

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BIO 122 – TEST 3 LECTURE 14 Understand the multi-disciplinary nature of ecology Central role of evolution Natural selection, gene flow, gene drift Genetics, behavior and physiology Geology, hydrology, climatology, chemistry, physics, geography, mathematics What are the objectives of ecology To understand how natural ecosystems work To understand how human activities are altering ecological systems Restoration of degraded ecosystems To provide sound science that can be used by resources managers & policy makers to develop and implement ecologically sound practices How is ecology defined? Know different definitions – meaning of environment, meaning of distribution and abundance Ecology Greek origins Oikos = house, logos = wisdom/study “house study of organisms” Charles Krebs Ecology is the scientific study of the interactions that determine the distribution and abundance of organisms
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Ernst Haeckel Ecology is the study of interactions between organisms and their environment Gene Likens Ecology is the scientific study of the processes influencing the distribution and abundance of organisms, the interactions among organisms, and the interactions between organisms and the transformation and flux of energy and materials Environment All factors/phenomena outside organisms that influence it Abiotic environment: physical and chemical processes Non living components: light, temperature, water and nutrients Biotic environment: other organisms Living components: plants, animals Distribution and Abundance How organisms are distributed across landscape/waterscape How common a species is where it occurs Factors that influence the processes of birth, death and dispersal What is meant by levels of biological organization Scientific understanding (smallest to largest [bold pertains to ecology]) Molecules Organelles Cells Tissues
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Organs Organ Systems Individuals Populations Communities Ecosystems Landscapes, Seascapes, Waterscapes Define Biosphere A portion of earth that is inhabited by life Understand Climatographs and what they reveal Climatograph A plot of the temperature and precipitation in a particular region What they reveal Reveal mean temperature, mean precipitation, and reveal that other roles than those two determine where biomes exist due to overlapping of biomes on the graph How does climate influence species distributions Species tend to create populations near more abundant water sources What is the difference between weather and climate Weather State of atmosphere Temperature, precipitation, cloud cover and wind Climate
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Average weather conditions experienced in a particular region over a long period of time Generally 70+ years Describe why latitudinal variation in climate occurs Latitudinal variation
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This note was uploaded on 04/23/2008 for the course BIO 122 taught by Professor Girman during the Spring '08 term at Sonoma.

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BIO 122 - BIO 122 TEST 3 LECTURE 14 Understand the...

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