BOTANY 160         PLANT ECOLOGY                            FALL 1995

                          QUIZ I



CHOOSE 5 of 8 (5 points each; Total 25 points)


1. One of the premier scientific journals of ecology goes by the name 
   Oikos. What is the literal  translation of this name and how does it 
   relate to ecology?



2. What paradigm or perspective did the aquatic biologists of the late 
   19th and early 20th  centuries contribute to the field of ecology?



3. Ecosystems are said to exhibit properties of cybernetic control. What 
   is meant by this  statement? Give one example.



4. Trophic dynamics start with the primary producers. What are primary 
   producers and how do  you distinguish gross primary production from net 
   primary production?



5. What information is conveyed by stating the trophic status of a lake?





6. Write out the chemical reactions of CO2 with H2O. Why are these reactions
   important for aquatic plants?





7. Draw the vertical temperature profile of a temperate zone lake in summer 
   and early spring. Of what importance is this to the phytoplankton 
   community?



8. Draw a typical seasonal  succession  graph of the major types of 
   phytoplankton in a temperate zone lake. Pick one group and give one 
   reason for it s dominance at that time of the year.