Download Symbiotic Relationships in Ecosystems

Symbiotic Relationships in Ecosystems/
Ecological Succession
What is Symbiosis?
-bosis= living together
3 Types of Symbiosis:
1. Mutualism
2. Commensalism
3. Parasitism
Symbiosis – “living together”
Relationship Type
Species A
Species B
Commensalism
+
0
Mutualism
+
+
Parasitism
+
-
Symbiosis
Whale and Barnacles
Commensalism- when one organism is helped and the other organism
is not harmed.
Who is the freeloader?
The whale or the barnacles
Army Ants and Silverfish
Mutualism– when BOTH organisms benefit from the relationship.
•
•
What type of
symbiotic
relationship is this?
Tapeworm and Human
• Parasitic—when one
organism benefits and
the other is harmed.
•
Some bacteria, fungus, protists, and other worms can also be
parasitic.
Ecological Succession
Ecological succession- a series of predictable physical changes that
occurs in an Environment. The change is slow.
Limiting Factors
1.
2.
3.
4.
5.
Population size
Predation
Parasitism
Natural disasters
Human disturbances
Population Growth Curves
What is a Watershed?
• A watershed is the area of land where all
of the water that is under it or drains off of
it goes into the same place.
Your task
• How does the shape of the land affect how
water travels through it?
• Directions: work in groups
• Materials: blue spray, cotton balls, gloves
• Create a watershed—10 minutes
• Exit question-how is this model like a real
world landscape?