1. SPECIES INTERACTIONS

2. Community Interactions  Competition – occurs when organisms of the same or different species attempt to use an ecological resource in the same place at the same time. Resources: water, food, light, space.

3. Community Interactions  Predation – when an organism feeds on another organism (predator  prey)  Symbiosis – Any relationship in which two species live closely. Mutualism Commensalism Parasitism

4. Mutualism (++)  When both species benefit from the relationship  Example: Many flowers depend on insects to pollinate them. Bugs help flowers reproduce and flowers provide bugs with nectar, pollen, etc.

5. Commensalism (+0)  One member benefits and the other is neither helped nor harmed.  Example: barnacles attach to a whale’s skin. Barnacles are able to filter feed from water rushing past them but they do nothing, good or bad, for the whale.

6. Parasitism (+-)  One organism lives on or in another organism and harms it.  Examples: fleas, ticks, tapeworms, zombie snails….

7. Zombie Snail Video  http://www.youtube.com/watch?v=EWB_COSUXM w&safety_mode=true&persist_safety_mode=1 http://www.youtube.com/watch?v=EWB_COSUXM w&safety_mode=true&persist_safety_mode=1