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15 Cards in this Set

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Ecology
Ecology – “the scientific study of the interactions among organisms and between organisms and their environment or surroundings”
Eco = house
Levels of organization
Species Population Community
Community
– Several different populations living together and interacting in an area
Population
Members of the same species living in close proximity to each other
Species
– A group of organisms that are closely related. They can interbreed and produce fertile offspring
organism
All of life is interdependent. None of us lives separately from the rest of the biosphere.
Levels of organization
Ecosystem Biome Biosphere
Ecosystem
– 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
Biome
– A group of similar ecosystems with a similar climate and similar dominant communities
Biosphere
– 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
Energy Flow
Every organism needs energy in order to live
The main source of energy for life on Earth is the Sun.
autotrophs (“self” “feeder”)
Organisms that capture energy from sunlight or chemical reactions and use that energy to produce food
2 types of autotrophs
photosynthesis chemosynthesis
photosynthesis
. Most plants, most algae, and some bacteria
chemosynthesis
There are some groups of bacteria that are chemoautotrophs – they obtain energy from chemical bonds of inorganic photosynthesis chemosynthesis