Transcript Ecology

Stem Words
ECO – House/Home
LOGY – “The science of…” OR “the study
Eco + logy = The study of home - where
things live.
The study of the
relationships living
things have with
each other and to
their environment.
Biotic Factors
Biotic Factors - all of the
LIVING things in an ecosystem
(living now or once was living)
Stem word: BIO =
life or living
Abiotic Factors
Abiotic Factors – all the NON-LIVING
parts of an ecosystem
1. Water
2. Sunlight
3. Soil
4. Air, Oxygen
5. Temperature
How Living and Non-Living things
are Organized on Earth:
From Largest to Smallest
1. Biome  2.Ecosystems 
3.Communities  4.Populations
5.Individual Organism
Biome – a group of ecosystems with
similar climates and organisms
Examples of Biomes:
1. Tropical Rain Forests
2. Tundra
3. Grassland
4. Desert
5. Ocean (marine)
6. Deciduous Forest
The Tundra Biome is a cold dry place
where no trees live.
Ocean Biome
Coniferous Forest (Tiaga)
Ecosystems Contains ALL the
living AND nonliving things that
interact in a
particular area.
Communities ALL the different populations of
organisms within an area.
ALL the members of one species in a
particular area.
It’s a NUMBER count. Does not matter how
big or small the area is.
World Population
South Carolina Pop.
Greenwood Pop.
EMS Population
- Organisms that are physically similar
- Can mate to produce FERTILE
- Fertile means their babies can have
- Similar DNA (genetics)
Examples of a Species:
Dogs - Different dog breeds can mate to
give mixed breed that look like both parents
AND the mixed puppies can have babies
Examples of Non-Species:
Horse + Donkey = Mule (Sterile)
Lion + Tiger = Liger (Sterile)
Zebra + Horse = Zorse (Sterile)
Sterile – cannot have babies
Horse + Donkey = A Mule (AKA: Honkey)
(A animal that is STERILE = cannot breed
Lion + Tiger = A Liger
(A sterile animal – cannot breed)
Horse + Zebra = Zorse
(A sterile animal – cannot breed)
Habitats – The place where an organism
lives and can find the things it needs
to survive.
Needs for Survival:
1. Food
2. Water
3. Shelter
4. Space
How big does an organisms
habitat need to be?
Depends on size of animal.
Squirrel – backyard
Whale – ocean
Fish – pond
Single ecosystem contains 1000’s of
A single ecosystem can contain
many habitats.
Changes in Population Size
(Positive and Negative)
1. Births and Deaths
2. Immigration and Emmigration
Immigration – moving into a population
Emmigration - moving out of a
3. Limiting Factors
Limiting Factors
An environmental factor that causes a
population to DECREASE or stop growing.
1. Food/water =
2. Disease/accidents
3. Shelter/Weather
5. Space
Competition over space
Birth/Death Rates
What happens to Moose population as Wolf
population increases?
Carrying Capacity
Carrying Capacity – the largest population
an environment can support.