Kentucky School for the Deaf
Levels of Organization within an Ecosystem
From tiny organisms to entire biomes, young scientists examine the interdependent relationships tying all living and non-living things together with this collection of ecology resources.
Encyclopedia of Earth
Encyclopedia of Earth: Ecology: Abiotic Factor
Explains what an abiotic factor is, and discusses each of six types and their roles in ecosystems and habitats. (Published: July 31, 2010)
Oswego City School District
Regents Exam Prep Center: Biotic vs. Abiotic
This NY Regents prep site provides a nice overview of what abiotic and biotic factors of an ecosystem are, as well as a brief description of carrying capacity.
Sophia Learning
Sophia: Ecosystems
Gives basic information about the community that forms between living and non-living factors that function together in an ecosystem. [47 secs]
BiologyWise
Biology Wise: Facts About Autotrophs and Heterotrophs
Explains what autotrophs and heterotrophs are, the several types of each, their roles in an ecosystem's food chains, and the differences between them.
Khan Academy
Khan Academy: What Is Ecology?
A webpage giving an overview of ecology. Learn about the biotic and abiotic factors that make up an ecosystem as well as the different levels of ecology.
CK-12 Foundation
Ck 12: Earth Science: Biological Communities Study Guide
Review the relationship between populations and ecosystems.