BIOLOGY 3SS3 Lecture Notes - Commensalism, Genetic Drift
17 Apr 2014
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Commensalism: interaction is good for one species, and close to neutral for the species other helps neutral hurts helps mutualism commensal neutral neutral hurts exploitation competition. What aspsects of a species life history could be affected by competition: survival growth, producing offspring, species may be very similar, or very different, oaks and maples competing for light, ants and deer competing for leaves, mussels and algae competing for space in the intertidal zone. If k1>k2, then species 1 can always increase when species 2 can; and sometimes when it can"t d n 1 dt d n2 dt. Reminder: d n 1 dt d n2 dt. Why might individuals have relatively weaker competitive interactions with members of the other species: they may compete for mating sites, example: birds with different nesting preferences, organisms may use resources in different ways, trees may produces leaves at different times, prefer different sized prey.
