CAS BI 107 Lecture Notes - Lecture 19: Aposematism, Niche Differentiation, Herbivore
14 Jan 2017
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Document Summary
Homotopy being disguised as something else that is not appetizing; defense against predation (caterpillar looks like bird droppings) Aposematic coloration vibrant, warning color of potentially poisonous prey. M llerian mimicry two or more unpalatable species resemble each other. Fundamental niche is defined by the physiological capabilities. Realized niche is defined by interactions with other species. Character traits of two closely related species differ more where they are sympatric (divided by something other than a physical barrier; resource partitioning) than where they are allopatric (divided by a physical barrier) Amensalism one species is harmed and the other is not affected (cows trample grass>>soil compaction) Three principles of conservation biology: evolution is the process that unties all of biology, the ecological world is dynamic, humans are part of ecosystems. Factors that threaten species survival: habitat destruction. Habitat fragmentation (harder for species to survive on edges: invasive species, overexploitation, climate change.
