EVPP 108 Lecture Notes - Lecture 3: Thermodynamics, Microorganism, Coprophagia

• School: George Mason University
• Department: Environmental Science and Public Policy
• Course: EVPP 108
• Professor: Kim Largen

Document Summary

Productivity of an ecosystem is defined as the rate at which radiant energy is stored by photosynthetic and chemosynthetic activity of producer organisms in the form of organic substances that can be used as food materials . The amount of organic matter accumulated in any unit time is called productivity. The different types of productivity are: primary productivity, secondary productivity, net productivity. The different types of productivity are: primary productivity. The rate at which radiant energy is stored by photosynthetic and chemosynthetic activity of producer e. g. green plants, phytoplankton: secondary productivity. The rates of energy storage at consumer levels . It is dynamic i. e. keeps moving from one organism to another. Consumers assimilate and not produce (odum: net productivity. The rate of storage of organic matter not used by the heterotrophs (consumers) during the unit period of time . It is the rate of increase of biomass of the primary producers which has been left over by the consumers.