Relationships in an Ecosystem

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

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)

Mutualism- both organisms benefit crocodile and bird

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

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

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