1. Presented by : Fatima Youssef and Sherouk Hany
Ecology
Presented by : Fatima Youssef and Sherouk Hany

2. Objectives What is the difference between a niche and habitat ?
What are producers and consumers in an ecosystem?
Learn about the Food Chain .
Introduction to Pyramid of Energy .

3. What is an Ecosystem ?
An ecosystem consists of a community of organisms together with their physical environment.

4. Levels of Organization
Organism
Population
Community
Ecosystem
Biome
Biosphere

5. Differentiate between
Habitat
Niche
The term typically refers to the area in which the organism lives and where it can find food, shelter, protection and mates for reproduction.
A niche is the role and position a species has in its environment; how it meets its needs for food and shelter, how it survives, and how it reproduces.

6. Definition of Producer Consumer
Primary consumers cannot produce their own food, such as a giraffe. Primary consumers only eat plants.
Producers, such as a tree, make their own food and begin this cycle called photosynthesis . The producers are then eaten by primary consumers

7. Food Chain
A food chain shows how each living thing gets food, and how nutrients and energy are passed from creature to creature. Food chains begin with plant-life, and end with animal-life. Some animals eat plants, some animals eat other animals.

8. Pyramid of Energy
An energy pyramid is a graphical model of energy flow in a community. It starts from the bottom – Producers
Producers — bring energy from nonliving sources into the community
Primary consumers — eat the producers, which makes them herbivores in most communities
Secondary consumers — eat the primary consumers, which makes them carnivores
Tertiary consumers — eat the secondary consumers