Transcript Biotic & Abiotic Factors Levels of Organization

WARM UP
What does it mean when you put an “A” in front of a
word?
For example:
*Asymmetrical
*Abiotic
*Atypical
*Asexual
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ECOSYSTEMS:
Biotic & Abiotic Factors
Levels of Organization
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Introduction
Ecology—study of living things
Way they interact with physical
environment
Important for determining role
they play
How to best maintain for future
generations
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Biotic—living organisms, plants, animals,
bacteria, fungi
Abiotic—nonliving factors of
environment
*air
* temperature
*water
* altitude
*rocks
* light
*minerals
* soil
Ecologists study interaction of biotic
and abiotic worlds
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Niche – role an organism plays in its
environment
Resource – something needed (such as
food, water and space)
Adaptation – structure or behavior that
increases the chance of species survival
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Habitats
 Where an organism lives
 Smallest level of relationship
ecologists study
 Refers to an organism’s
specific requirements:
food water
shelter space
www.house.gov
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Habitats
(continued)
 Food/Water requirements vary greatly
 Basis of how organism derives energy
 All organisms require water to survive
 Shelter—way organism protects itself from
environment
 Protective body parts or constructing a shelter
 Space in which to live
 Small to large area depending on organism
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Levels of Organization
1 - Biosphere – realm of living things, thin
film of life on earth
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Levels of Organization
2 - Ecosystem – short word for ecological system
- Interaction of all the organisms and abiotic
factors in a given area.
*Amount of sunlight a region receives
*Amount of moisture in an area
*Temperature of the environment
*Surrounding landscape
- Aquatic and terrestrial
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Levels of Organization
3 - Community – Interaction among all
of the different populations of species in
a given area
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Levels of Organization
4 – Population – Group of the same
type of organism living in the same
geographic area at a given time.
*Group of organisms genetically resemble
each other (SPECIES)
*Can reproduce with each other
*Small – bacteria on a particle of soil
*Large – human beings in the United States
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POPULATION
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