1. Ecosystems at Risk

3. What is an ecosystem?

4. Definition of an Ecosystem
A biological community of interacting organisms and their physical environment. Ecosystems consist of plants, animals and microorganisms working together as a functional unit.

5. Ecology is the science that examines the interactions between organisms and their living (biotic) and non-living (abiotic) environment.
They interact and exchange matter and engergy

6. Living (biotic) Non-Living (abiotic)
Water
Soil
Air
Minerals
Light
Plants
Fungus
Bacteria
Animals
YOUTUBE: Biotic & Abiotic Factors
YOUTUBE: Why Biodiversity Matters

7. Food Chains
Ecosystems and their functioning - Variations in Ecosystems - Classifying ecosystems - The Ecosphere