Ecology is the study of how living things interact with each other and their environment. There are different levels of ecological organization from organisms to populations to communities to ecosystems and finally the biosphere. Ecosystems are composed of biotic factors like living things and abiotic non-living factors like climate and sunlight. Major ecosystems include forests, grasslands, deserts, marine, and freshwater ecosystems.

1. ECOLOGY

2. ECOLOGY
•branch in biology that studies
how living things interact with
each other and their
environment.
•all living things differ, but they
are interdependent
•“ecos” + “logos”

3. ECOLOGICAL LEVELS
OF ORGANIZATION
•1. Organism – the basic unit of
ecological system.
•2. Population – the group of the
same organisms living together
in an area with the ability to
interact and interbreed

4. ECOLOGICAL LEVELS
OF ORGANIZATION
•3. Community – group of
different populations of different
organisms
•4. Ecosystem – composed of
communities interacting with the
physical environment

5. ECOLOGICAL LEVELS
OF ORGANIZATION
•5. Biosphere – the largest
ecological level of organization
where all ecosystems interact

7. COMPONENTS OF
ECOSYSTEM
• Biotic Factors
• Abiotic Factors

8. KINDS OF
ECOSYSTEM
• 1. Forests – abundant
plants, animals, fungi
and microorganisms,
have high density and
diversity

10. KINDS OF
ECOSYSTEM
• 2. Grasslands –
ecosystems that are
dominated by grasses
with few trees and
shrubs

12. KINDS OF
ECOSYSTEM
•3. Desert – found in
regions that have very
minimal amount of
rainfall

13. v

14. KINDS OF
ECOSYSTEM
•4. Marine Ecosystem –
largest ecosystem, high
amount of dissolved
salts

16. KINDS OF
ECOSYSTEM
•5. Freshwater
Ecosystem – ponds,
rivers, springs, other
wetlands.

18. KINDS OF
ECOSYSTEM
NICHE – the role of an
organism in a specific
ecosystem