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Which curve shows that a population
reached its carrying capacity?
Niche and invasive species
What is a niche?
A species ecological role
“Way of life”
Role: job that species does
Habitat: species address
Example of a specific niche
Habitat
Type of food it can eat
Water quality (pH,
salinity, temperature)
Niche and competition
Only one species can occupy a specific
niche
2 outcomes of niche overlap
1.Competitive exclusion
2.Resource partitioning
Competitive Exclusion
Resource Partitioning
Fundamental niche vs. realized niche
Invasive Species
Invasive species
An animal or plant that is non-native to
an ecosystem
Humans are the primary means of
species introduction
Invasive species video: 2 questions
1. What is meant by: “Invasive not because of
what it is, but where it is”?
2. Describe how limiting factors within a native
ecosystem keep the balance of a species?
Invasive species video
http://ed.ted.com/lessons/the-threat-of-invasivespecies-jennifer-klos
Invasive Species Investigation
1. What is it?
2. What is its ecological impact as an invasive
species?
3. What is the management plan?
Energy Pyramid within a food web
10% transfer of energy up each trophic level
Concept Check
In the deer and wolf
population investigated
yesterday, why was the
deer population larger
than the wolf population?
Concept check:
Zebra mussels are filter
feeders that consume
almost all algae within a
lake, what impact does
this have on the energy
pyramid?
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