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Lessons of Ecology Handout 2

by: Caitlyn Mackenzie

Lessons of Ecology Handout 2 FANR 1100

Marketplace > University of Georgia > FANR 1100 > Lessons of Ecology Handout 2
Caitlyn Mackenzie
GPA 3.8

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About this Document

This is the second handout of the third weeks lecture section, Lessons from Ecology. The prior handout, this handout, and future handouts are directly related to the test
Forestry and Natural Resources Conservation
Class Notes
Science, Ecology, forestryandnaturalresources, conservation
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This 2 page Class Notes was uploaded by Caitlyn Mackenzie on Tuesday August 23, 2016. The Class Notes belongs to FANR 1100 at University of Georgia taught by Wilde in Fall 2016. Since its upload, it has received 3 views.


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Date Created: 08/23/16
Principles of Ecology: Part 2 FANR/MARS 1100 Relevant Scientific Principles: Matter  Matter = something that occupies space and can be perceived o Organic = living, composed of C, H, O o Inorganic = non­living, mineral­based  Law of Conservation of Matter: matter can be Changed from one form to another but cannot  be created or destroyed by ordinary chemical means Relevant Scientific Principles: Energy  Energy = the ability to do work o potential Energy = energy in an object at rest o kinetic Energy = energy of motion  First Law of Energy: energy cannot be created or destroyed but can be converted from one  form to another  Second Law of Energy: conversions result in energy lost as heat Relevant Scientific Principles: Entropy  Entropy = the tendency for all matter and energy in the universe to evolve toward a state of  inert uniformity (or disorder) Flow of Energy Through Ecosystems  Solar Energy: virtually all energy in the biosphere comes from the sun  Photosynthesis major life­sustaining process o Solar energy + 6CO  + 6H O > C H O  + 6O 2 2 6 12 6 2  Respiration: breakdown of sugars by plants and animals to produce energy o C H76 12 66  > 62O  + 6H 2 + en2rgy  Primary production organic matter produced by plants  1. Gross Primary Production (GPP): total biomass produced by plants 2. Net Primary Production (NPP): biomass that remains after plants use a share  Producers (autotrophs): green plants; convert chemical energy  Comsumers (heterotrophs): organisms; consume stored energy Ecosystem Structure: Food Weds and Food Chains  There are more primary producers than top comsumers  Primary producers  Herbivores  carnivores Ecosystem Structure: Detrital Food Chains  Detritus feeder: organisms that obtain their energy and nutrients form waste material and  dead bodies  Detritus food web: any food web that has its base in the dead remains of plants and animals Ecosystem Structure: Trophic Levels  Trophic level definition: a group of organisms that occupy the same position in a food  chain/web 


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