PPT 3: Lake Eutrophication, NPP, GPP Sep 2, 2010 Dispatch Explain this diagram GPP and NPP • Gross primary production (GPP) is the rate at which an ecosystem's producers capture and store a given amount of chemical energy as biomass in a given length of time. • Net primary production is the rate at which all the plants in an ecosystem produce net useful chemical energy. Some net primary production goes toward growth and reproduction of primary producers, while some is consumed by herbivores. NPP = GPP - respiration [by plants] Activity: Get a Mat • Take out the leaf and the mitochondria. • What factors go in and out of a leaf’s chloroplast for photosynthesis? • What factors go in and out of a leaf’smitochondria for cellular respiration? Primary Productivity of a plant Primary productivity is ___________ It can be measured in three ways: _______________________________ 1. The amount of ____________used carbon dioxide glucose 2. The rate of _________formation oxygen 3. The rate of _______ production How does Nitrogen get to the Atmosphere? Phosphorous Cycle Eutropication • http://www.montereyinstitute.org/courses/AP %20Environmental%20Science/course%20files /multimedia/lesson78/lessonp.html?showTopi c=1 Dissolved Oxygen Lab 1) What do the result mean? 2) What are 3 sources of error? Exit Quiz Sticker Celebration Put your sticker if you have an 8 or higher on exit quiz 1 Lab Folder Sticker • Download AP Bio Lab Folder • Print questions for the lab and attach them to the lab report.