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Coevolution + Mutualism

by: carr34 Notetaker

Coevolution + Mutualism BIO 301-01

carr34 Notetaker

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About this Document

These notes cover "Coevolution + Mutualism "
Principles of Ecology
Robert H. Stavn
Class Notes
Introduction, Ecology
25 ?




Popular in Principles of Ecology

Popular in Biology

This 2 page Class Notes was uploaded by carr34 Notetaker on Sunday October 16, 2016. The Class Notes belongs to BIO 301-01 at University of North Carolina - Greensboro taught by Robert H. Stavn in Fall 2016. Since its upload, it has received 6 views. For similar materials see Principles of Ecology in Biology at University of North Carolina - Greensboro.


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Date Created: 10/16/16
Coevolution + Mutualism  Increase species diversity [divert + share resources] Coevolution ­ compound existing species diversity Mutualism ­ coevolution  Bees as pollinators [plants torn bees into resource] Attractant ­ nectar (dividing calories) Optimalize Desert willow ­ [flower] nectar pool; bees drain the nectar pool of flowers until no more in the  morning; bees comes back in afternoon to go for nectar groove which holds nector Reproduction ­ pollen and seeds Pollination ­ signal and reward  Flavoriod + terpenes ­ insects [ flowers pollinated by insects] No odor ­ birds (red) [flowers pollinated by birds] Coadaptation ­ other plants [divide up reproductive season] Phenology ­ study of seasonal changes of reproduction in plants and animals [time  resource] Seed disparson ­ fruits ­ flowers ­ seeds [taxazallaloid] Optimization  [optimate return] No community totally optimal [have to be trade offs] Invasions possible [species not in community]        [not coevolution] Pheromones ­ diversity + fragrance  Alleoenemices Social cues Competition ­ allelopathy [ defensive chemicals] Secondary compounds [no direct chemical (use) to plants] Tomatoes and Walnut Tree  Cannot grow tomatoes under walnut tree because of the chemical it produces that  makes it impossible for a plant to grow underneath the tree. Qualitative chemical defense [autotoxic] Low concentration ; toxic alkaloids Quantitative chemical defense [bad taste] Tannius; phytolith (silica); lignin Optimal Defense Theory [secondary compound] Less defended organisms­ higher fitness [less energy to fight off compound; more energy to produce offspring] Clover ­ non toxic ­ reproduction higher rate Allocation to high risk tissues Tannius - leaves → seeds Reduce defense ­ enemies absent Forestry  Ant Guard Symbiosis [africa ­ 20kg colony] Driver ants goes on rampage [costa rica] Driver ants once a year Attack same building and remove verman in building Behavior simple Follow triail; recognize own species [Acacia] (tropics) House + feed ants


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