<p> Freshwater Ecosystems Test Review 2015 Completed review on separate paper will be worth 5 points on your test 1. Define the following terms: limnology, lentic, lotic, plankton, zooplankton, phytoplankton, nekton, benthos, submergents, and emergents.</p><p>2. What is overturn? Why is it important? </p><p>3. What are the three temperature based layers in a lake? How are they different and where are they found? In what layer are most fish found? Draw a cross section of a lake and label the temperature layers and the thermocline.</p><p>4. What is a thermocline? In which temperature layer does the thermocline exist? During what season do you find the largest thermocline in a lake? Why does the thermocline form? Describe how the thermocline is related to fall overturn.</p><p>5. How does dissolved oxygen enter the water of a lake?</p><p>6. How is the amount of oxygen that water can hold affected by temperature? By pressure?</p><p>7. How does respiration affect the amount of oxygen in a lake? </p><p>8. How does decomposition affect the amount of oxygen in a lake? In which layer/zone is the change most evident (i.e. where does most decomposition occur)? What organisms are considered to be decomposers?</p><p>9. In a midsummer lentic ecosystem, oxygen levels become stratified. Describe why.</p><p>10.What is turbidity? How can turbidity change the depth of the trophogenic zone?</p><p>11.How do lakes form?</p><p>12.What and where is the littoral zone? What type of producers live in the littoral zone?</p><p>13.What and where is the limnetic zone? What type of producers live in the limnetic zone? </p><p>14.What are plankton? What are the types of plankton?</p><p>15.What’s the difference between a eutrophic and oligotrophic lake?</p><p>16.Define the following terms associated with Lotic Ecosystems:</p><p> a. Mouth b. Delta c. Headwaters d. Estuary</p><p> e. Riffle f. Pool g. Meander h. floodplain</p><p>17.Describe differences between a scraper, collector, shredder, parasite and piercer.</p><p>18.What is CPOM and FPOM and where are they found in a lotic ecosystem?</p><p>19.Explain why there are different types of organisms in different parts of a river. Use to complete review and study:</p><p>Lentic and Lotic notes</p><p>Interpreting Diagrams: Lentic Ecosystems</p><p>Lentic Ecosystem Drawing</p><p>Benthic Macroinvertebrate Booklet</p><p>Freshwater Crossword Freshwater Ecosystems Test Review 2015 Completed review on separate paper will be worth 5 points on your test 1. Define the following terms: limnology, lentic, lotic, plankton, zooplankton, phytoplankton, nekton, benthos, submergents, and emergents.</p><p>2. What is overturn? Why is it important? </p><p>3. What are the three temperature based layers in a lake? How are they different and where are they found? In what layer are most fish found? Draw a cross section of a lake and label the temperature layers and the thermocline.</p><p>4. What is a thermocline? In which temperature layer does the thermocline exist? During what season do you find the largest thermocline in a lake? Why does the thermocline form? Describe how the thermocline is related to fall overturn.</p><p>5. How does dissolved oxygen enter the water of a lake?</p><p>6. How is the amount of oxygen that water can hold affected by temperature? By pressure?</p><p>7. How does respiration affect the amount of oxygen in a lake? </p><p>8. How does decomposition affect the amount of oxygen in a lake? In which layer/zone is the change most evident (i.e. where does most decomposition occur)? What organisms are considered to be decomposers?</p><p>9. In a midsummer lentic ecosystem, oxygen levels become stratified. Describe why.</p><p>10.What is turbidity? How can turbidity change the depth of the trophogenic zone?</p><p>11.How do lakes form?</p><p>12.What and where is the littoral zone? What type of producers live in the littoral zone?</p><p>13.What and where is the limnetic zone? What type of producers live in the limnetic zone? </p><p>14.What are plankton? What are the types of plankton?</p><p>15.What’s the difference between a eutrophic and oligotrophic lake?</p><p>16.Define the following terms associated with Lotic Ecosystems:</p><p> a. Mouth b. Delta c. Headwaters d. Estuary</p><p> e. Riffle f. Pool g. Meander h. floodplain</p><p>17.Describe differences between a scraper, collector, shredder, parasite and piercer.</p><p>18.What is CPOM and FPOM and where are they found in a lotic ecosystem?</p><p>19.Explain why there are different types of organisms in different parts of a river. Use to complete review and study:</p><p>Lentic and Lotic notes</p><p>Interpreting Diagrams: Lentic Ecosystems</p><p>Lentic Ecosystem Drawing</p><p>Benthic Macroinvertebrate Booklet</p><p>Freshwater Crossword</p>