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15 Cards in this Set
- Front
- Back
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Ecology
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Ecology – “the scientific study of the interactions among organisms and between organisms and their environment or surroundings”
Eco = house |
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Levels of organization
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Species Population Community
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Community
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– Several different populations living together and interacting in an area
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Population
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Members of the same species living in close proximity to each other
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Species
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– A group of organisms that are closely related. They can interbreed and produce fertile offspring
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organism
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All of life is interdependent. None of us lives separately from the rest of the biosphere.
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Levels of organization
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Ecosystem Biome Biosphere
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Ecosystem
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– A collection of the organisms that live in a specific area together and interacting with the nonliving environment in which they live. This is typically the level studied by ecologists
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Biome
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– A group of similar ecosystems with a similar climate and similar dominant communities
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Biosphere
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– The portions of the planet where all life exists – land, air, water up to 5 miles above the Earth’s surface to seven miles deep in the ocean
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Energy Flow
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Every organism needs energy in order to live
The main source of energy for life on Earth is the Sun. |
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autotrophs (“self” “feeder”)
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Organisms that capture energy from sunlight or chemical reactions and use that energy to produce food
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2 types of autotrophs
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photosynthesis chemosynthesis
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photosynthesis
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. Most plants, most algae, and some bacteria
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chemosynthesis
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There are some groups of bacteria that are chemoautotrophs – they obtain energy from chemical bonds of inorganic photosynthesis chemosynthesis
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