BIO 100 Lecture Notes - Lecture 2: Primary Succession, Keystone Species, Primary Producers

• School: University of Maine
• Department: Biology
• Course: BIO 100
• Professor: Farahad Dastoor

Document Summary

Community: group of individuals interacting with each other. These interactions can be harmful, helpful, and neutral in other words: competition, predation, herbivory, symbiosis. Species compete for a resource in short supply. Strong competition can lead to competitive exclusion. All resources to self and other species become extinct due to limited resources. Concept of ecological niche: function and space occupied by individual, fundamental vs. realized. Realized: only a part of that entire area. Defense mechanism (physical defense) (not get eaten all the time) Cryptic coloration: blending in background; not being observed. Aposematic coloration: not blending in background; very physical (warning), stand out in bright colors. Batesian mimicry: a harmless species mimics a harmful one: mimic and look alike (thinking somethings dangerous when it"s not) Example: hawkmoth larva and green parrot snake. Mullerian mimicry: two nasty species mimic each other: all are equally toxic (all different, but look the same)