Textbook Notes (368,774)
Canada (162,158)
Biology (600)
BIO120H1 (305)
Chapter 19

Chapter 19 - Lecture 4 - Week 2.docx

6 Pages
Unlock Document

Michelle Hilscher

Week 2 BIOB50 Lecture 4Chapter 19ProductionHydrothermal vent communities at bottom of the deep blue sea no photosynthesis how did they obtain their foodIntroductionRaymond Lindeman grouped the energy flow in the ecosystem in terms of how they obtain their energyEcosystem termed by AG Tansley all of the component of an ecological system biotic and abiotic that influence the flow of energy and elements nutrients pollutantsPrimary ProductionPrimary production chemical energy generated by autotrophy by the fixation of carbon during photosynthesis and chemosynthesis Conversion of light energy to chemical energy used by autotrophs and gained by heterotrophsThe energy is stored as carbon compounds in tissues of plants carbon is used to measure primary productionThe rate of primary production is called primary productivityGross primary production is total ecosystem photosynthesisGross primary production the amount of carbon fixed by the autotrophs in an ecosystemThe GPP of an ecosystem is controlled by the rate of photosynthesis which is affected by the climate and leaf area index LAI which is the leaf area of the plants per unit of ground areaLAI in tundra 01 and tropical and boreal forests12Plant respiration rates increase with temperature so respiratory carbon losses are higher in tropical forest and in temperate and boreal forestsNet primary production is the energy remaining after respiratory lossesNPP GPPrespirationNPP is the amount of energy captured by autotrophs that results in increased living plant matter biomass
More Less

Related notes for BIO120H1

Log In


Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.