Class Notes (838,076)
Canada (510,662)
Biology (1,910)
BIOL 2060 (125)
c (20)


2 Pages
Unlock Document

BIOL 2060

Chapter 56: Ecosystem and Global Ecology 56.2 How Does Energy Flow Through the Global Ecosystem? Solar energy drives ecosystem processes • Solar energy enters ecosystems by way of plants and other photosynthetic organisms. • Only about 5 percent of the solar energy that arrives on Earth is captured by photosynthesis; remaining energy is either radiated back into the atmosphere as heat or taken up by the evaporation of water. • Gross primary productivity (GDP) is the rate at which energy is incorporated into the bodies of photosynthetic organisms. • The accumulated energy is called gross primary production. • Primary producer use some of this accumulated energy for their own metabolism; the rest is stored in their bodies or used for their growth and reproduction. • The energy available to organisms that eat primary producer, called net primary production (NPP), is gross primary production minus the energy expended by the primary producers during their metabolism. • Only the energy of an organism’s net production is available to other organisms that consume it. • The geographic distribution of the energy assimilated by primary producers reflects the distribution of land masses, temperature, and moisture on Earth. • Production in aquatic ecosystems in limited by light, which decreases rapidly with depth; by nutrients, which sink and must be replaced by upwelling of water; and by temperature. Human activities modify flows of energy • Some human activities decrease net global primary productivity (e.g. conversion of forests). 56.4 What Service
More Less

Related notes for BIOL 2060

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.