Lessons of Ecology Handout 2
Lessons of Ecology Handout 2 FANR 1100
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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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