Question 12

What are the interactions between photosynthesis and cellular respiration? [Chapter 54]

Primary Production in Ecosystems (read pages 1200-105)

1. An ecosystems energy budget depends upon primary production (=photosynthesis).

2. In aquatic ecosystems light and nutrients limit primary production.

3. In terrestrial ecosystems temperature, moisture, and nutrients limit primary production.

Secondary Production in Ecosystems (read pages 1206-1214)

1. The efficiency of energy transfer between trophic levels is usually less than 20%.

2. Herbivores consume a small percentage of vegetation: the green world hypothesis.

John C. Murphy	Science
Phone:  (815) 436-3200, ext. 2120
jmurphy@learningcommunity202.org

	Plainfield High School Home Page
Link to District 202 Home Page	Science Home Page

© 2001 Plainfield Community Consolidated School District 202.