Energy Flow Through an Ecosystem - BIOLOGY FOR LIFE
Energy Flow Through an Ecosystem
Food Chains, Food Webs, and Ecological Pyramids
What is Ecology?
ECOLOGY is a branch of biology that studies ecosystems.
Ecological Terminology
? Environment ? Ecology ? Biotic vs. Abiotic ? Population ? Community ? Ecosystem ? Biosphere
? Environment ? surroundings of an organism including the plants, animals and microbes with which it interacts.
? Ecology ? study of how living organisms interact with the physical and biological environments.
? Abiotic - non-living chemical and physical factors of the environment (e.g. temperature, light, water, soil, nutrients).
? Biotic ? living organisms that are part of the environment.
? Population ? a group of individuals of the same species living in the same geographic area.
? Community ? all interacting populations living in the same geographic area.
? Ecosystem ? all interacting communities of organisms and abiotic factors of the environment within a defined area.
? Biosphere ? the global ecosystem, including all the earth's regions that can support life (land, air, water).
The 3-Step ENERGY Pathway of Ecosystems
ENERGY in the ecosystem
ENERGY !
BEGINS WITH SUNLIGHT
LIGHT
1.
CHEMICAL ENERGY 2.
HEAT 3.
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