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1. Introduction to Ecology

2. What isEcology
• The study of how
organisms interact
with their
environment
• All organisms must
interact with both
living and nonliving
things that surround
them

3. Levels of Organization
• To add to our list of the levels of
organization:
–Cells  Tissues Organs  Organ Systems
 Organisms  Population Community
 Ecosystem  Biosphere

4. The environment
• Made up of all the
living and nonliving
things that surround
an organism.
• Vocabulary:
– Abiotic Factors
– Biotic Factors

5. Environment vsHabitat
• Many species can
survive in more than
one environment.
• But each species
has its “home” or
habitat.
–Fish may beable to
live in fish tanks,but
would rather live in
the wild

6. Basic Concept ofEcology
• The fundamental idea behind the
study of ecology is that all organisms
are interdependent.
• They interact with oneanother and
the physical environment.

7. What do organisms need to
survive?
• Basic requirements
for survival include:
– Food
– Water
– Shelter

8. Competition
• An important
aspect of the
struggle for survival
involves
competition for
limited resources
– Food
– Water
– Shelter
– Sunlight

9. Limiting Factors
• Limiting factors are
factors that affect
the population size
of a species in a
specific
environment.
• They can be abiotic
or biotic.

10. Recycling
• Who isultimately responsible forthe
recycling of nutrients?
– Decomposers
• What gets recycled?
– Minerals
– Nutrients

11. Recycling
• What else getsrecycled?
– Carbon Dioxide
– Water
– Carbon
• The energy from the Sun keepsthe
cycle going

12. Carbon Cycle

13. Water Cycle

14. Nitrogen Cycle

15. Vocabulary
alternative energy: energy derived from sources that do
not use up natural resources or harm the environment.
Bioclimatic: of or concerned with the relations of climate
and living organisms.
Biodegradable: capable of being decomposed.
Biodiversity: the diversity of plant and animal life in a
habitat.
Ecosystem: organisms interacting with their physical
environment