National Geographic
National Geographic: Symbiotic Relationships in Marine Ecosystems
For this lesson young scholars analyze videos to make observations about species, populations, and communities of organisms and discuss their symbiotic relationships. Then they create a hypothetical marine ecosystem and describe the...
Other
Hub Pages: Abiotic Factors: A Component of Ecosystem
In the environment, there are external factors that really affect organisms living within it. One of these factors is the set of abiotic factors, or nonliving variables, such as wind, ocean, day length, rainfall, temperature, and ocean...
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Grasslands Conservation Council of British Columbia
An overview of the ecosystems in British Columbia.