Lake Washington’s recent history; W.T. Edmondson.
The objective of this homework is to get you thinking about the dynamics of eutrophication and Lake Washington by reading the work of W.T. Edmondson. Dr. Edmondson was a professor at the University of Washington, and his science inspired the management of Lake Washington.
Answer the following questions:
- List 3 anthropogenic alterations and their dates which have profoundly influenced the biology of Lake Washington (between 1900 and 1994), according to W.T. Edmondson.
- Daphnia have appeared and disappeared in the last century in Lake Washington. They are a center piece of the lake’s food web.
- a) Describe Daphnia’s role in the food chain (i.e. what eats them and what do they eat)?
- b) What factors did Edmonson propose that regulate Daphnia in Lake Washington?
- c) What data are not shown in figure 2 (Edmondson 1994, p.78) that may help further convince you of Edmondson’s explanation of Daphnia population changes?
- What characteristics of Lake Washington may have contributed to its rapid recovery from eutrophication?
- Locate 3 journal articles on Lake Washington eutrophication or ecology and summarize each one in a single paragraph – you may paraphrase the abstract – not direct copy (3 paragraphs in total)