BISC 204 Lecture Notes - Lecture 12: Anopheles, Amphiprioninae, Cleaner Shrimp
13 Nov 2017
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Other types of interactions: positive indirect effects, trophic cascade: benefits alternate between tropic levels. Killer whale, sea otter example (estes et al. 1998: commensalism (+/0): species interactions where one species benefits, the other is unaffected, not well studied, assumption about neutral effects not always correct. Barnacles grow on whales, they benefit from [] of food from ex. barnacles on whales around the whale. Eat when ded, wolves don"t care bc they already dead ex. scavengers following predators: mutualism (+/+): positive species interactions where both species benefit. Cleaner shrimp eating parasites off of eels. *very common, and sometimes species pairs are highly specialized (co- evolved symbiosis: trophic: complementary acquisition of resources (ways organisms obtain energy and nutrients) Examples: mychorrhizae and plants: defensive: one species provides a protective function in return for energy/nutrients. Acacia plants have these spikes with small openings that are ant acacia houses for the ants, army for defense.
