LS1_LECTURE_21

LS1_LECTURE_21 - final 170 pts ecology 90 pts EVERYTHAAANG...

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Areas of Ecological Study ! Ecology is the study of how organisms interact with their environment. ! The central goal of ecology is to understand the distribution and abundance of organisms. ! Among the most synthetic fields in the biological sciences. ! Opportunity to apply what you have learned during the course!! ! In ecology, researchers work at four main levels: 1) Organisms 2) Populations 3) Communities 4) Ecosystems
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Genes Landscape/ Ecosystem Community Organism / Individual Community Population Individual Individual Community Community Population/ Species Population/ Species Population/ Species Smaller Scale Larger Scale Hierarchy in Nature
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Organismal Ecology ! Organismal ecologists explore the morphological, physiological, and behavioral adaptations that allow individual organisms to live successfully in a particular area.
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Population Ecology ! A population is a group of individuals of the same species that lives in the same area at the same time. ! Population ecologists focus on how the numbers of individuals in a population change over time.
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Community Ecology ! A biological community consists of the species that interact with one another within a particular area. ! Community ecologists study the nature and consequences of the interactions between species (e.g. predation, parasitism, and competition) and the consequences of those interactions (e.g. exploring how groups of species respond to disturbances such as fires & floods).
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Ecosystem Ecology ! An ecosystem consists of all the organisms in a particular region, along with nonliving, or abiotic , components. ! Ecosystem ecologists study how nutrients and energy move among and between organisms and the surrounding atmosphere and soil or water. ! Because humans are affecting energy flows and climate, this work has direct public policy implications.
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Types of Terrestrial Ecosystems ! Biomes are major groupings of plant and animal communities defined by a dominant vegetation type. ! Each biome is associated with a distinctive set of abiotic conditions. ! The type of biome present in a terrestrial region depends on climate —the prevailing, long-term weather conditions found in an area. ! Weather consists of specific short-term atmospheric conditions. ! Climate and weather consist of temperature , moisture , sunlight , and wind .
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Types of Terrestrial Ecosystems ! The nature of the biome that develops in a particular region is governed by: ! The average annual temperature and precipitation. ! The annual variation in temperature and precipitation.
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LS1_LECTURE_21 - final 170 pts ecology 90 pts EVERYTHAAANG...

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