1. Relationships in an Ecosystem

2. Symbiosis
A relationship between two organisms where one organism depends on the other for a necessary resource

3. 3 types of Symbiosis
Parasitism – one organism called the parasite- lives on another, called the host. The parasite is helped, the host is harmed. (tick on a dog)

4. Mutualism- both organisms benefit crocodile and bird

5. Commensalism- one organism benefits, the other is not helped or harmed (shark and remora)

6. Predator/Prey Interaction
Predator – eats
Prey- gets eaten
Survival techniques
Camouflage
Chemical warfare
Warning coloration
Mimicry
Behavioral strategies

7. Predator-Prey Relationships
Figure 5-6 These prey species have developed specialized ways to avoid their predators: (a, b) camouflage, (c, d, e) chemical warfare,
(d, e, f) warning coloration, (f) mimicry, (g) deceptive looks, and (h) deceptive behavior.
Fig. 5-6, p. 106