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Lec09 Study questions

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Department
Environmental Science
Course Code
EESA11H3
Professor
George Archontitsis

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Lecture (7-9)-Questions
1. What is the Great Lakes Water Quality Agreement (Motivation, objectives and
accomplishments)?
2. What causes the hypoxia problems in Lake Erie?
3. What do you know about the water quality in Lake Michigan, Lake Superior and Lake Huron?
4. Describe the trends of the nutrient (phosphorus, nitrate) loadings and concentrations in Lake
Ontario during the last 30 years.
5. Which were the major phytoplankton community structural shifts caused by the process of
oligotrophication?
6. What is the “microbial loop”?
7. What is the impact of alewife (Alosa pseudoharengus) on the zooplankton species composition
in Lake Ontario? What is the main cause for the decrease of the zooplankton productivity in
Lake Ontario?
8. What is an “invasive species” and how are they introduced in the Great Lakes?
9. How can we prevent the ballast-mediated introductions of invasive species?
10. Provide a brief description of the “biotic resistance” model.
11. Provide a brief description of the “invasional meltdown” model.
12. What was the main cause for the decrease in the abundance of the amphipod Diporeia? What
does this change imply for the lake’s food web dynamics?
13. Which are the community, food web, and ecosystem-level effects of the Dreissena spp. mussel
invasions? What is their hypothesized role on the recent cyanobacteria dominance in Lake Erie?
14. What is the damage done by the sea lampreys in the Lake Ontario food web dynamics? How can
we control its population?
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Description
Lecture (7-9)-Questions 1. What is the Great Lakes Water Quality Agreement (Motivation, objectives and accomplishments)? 2. What causes the hypoxia problems in Lake Erie? 3. What do you know about the water quality in Lake Michigan, Lake Superior and Lake Huron? 4. Describe the trends of the nutrient (phosphorus, nitrate) loadings and concentrations in Lake Ontario during the last 30 years. 5. Which were the major phytoplankton community structural shifts caused by the process of oligotrophication? 6. What is the microbial loop? 7. What is the impact of alewife (Alosa pseudoharengus) on the zooplankton species composition in Lake Ontario? What is the main cause for the decrease of the zooplankton productivity in Lake Ontario? 8. What is an invasive species
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