1. Symbiotic Relationships (Species Interactions)
Living Environment

2. 1. Predation One organism kills and eats another Predator – the eater
Prey – the eaten
+/-
Ex: lions feed on zebra

3. 2. Competition
Occurs when more than one species used the same limited resource
-/-
Ex: lions and hyenas eat the same prey or a maple tree and grass competing for nutrients

4. 3. Parasitism One organism lives on another causing harm
Host – organism being lived on
Parasite – organism causing the harm
+/-
Ex: ticks, fleas, tapeworms

5. 4. Mutualism Both organisms benefit from the relationship +/+
Ex: intestinal bacteria in humans, oxpeckers on zebras

6. 5. Commensalism One organisms benefits and the other is not affected
+/0
Ex: remora fish and shark

7. CFU
Name and describe one symbiotic relationship and give an example not discussed in class.