BioEd Online
Bio Ed Online: Ecosystems
Ecosystems are composed of all interacting organisms (biota) along with their physical and chemical environments. Physical aspects of an ecosystem, called abiotic components, include variables related to temperature, sunlight, soil, and...
Minute Earth
Minute Earth: Why Poor Places Are More Diverse
This video provides a brief explanation of why different ecosystems vary in species variety. [3:32]