Steelhead trout, otherwise known as rainbow trout, have seen a population decline in the Western United States over the last several decades. There are a wide variety of conditions that are threatening the population, including pollution, climate change, and invasive species. This activity will look at the effects of varying two specific abiotic factors on a controlled population of trout. Graph the range of tolerance data below for steelhead trout. Each graph should be completed separately. Water temperature and dissolved oxygen are independent variables, and should be graphed on the x- axis. The number of fish, a dependent variable, should be on the y-axis. Number of Fish Counted Water Temp. (°C) 1 1 2 3 4 10 15 21 7 8 24 9. 20 10 17 11 14 12 12 13 10 14 8 15 16 3 17 18 19 20 1. The optimal range is the amount of an abiotic factor that produces the highest possible population. For water temperature, this would be about 6-10°C. Label this area on the graph. 2. The zone of physiologic stress occurs when an abiotic factor exists at levels that are too high or low to support normal biotic potential. This would be 3-6°C and 10-16°C. 3. The zone of intolerance occurs when a population is absent (or in this case, nearly absent). This occurs at either extreme of our water temperature graph, below 3°C and above 16°C. 110
Steelhead trout, otherwise known as rainbow trout, have seen a population decline in the Western United States over the last several decades. There are a wide variety of conditions that are threatening the population, including pollution, climate change, and invasive species. This activity will look at the effects of varying two specific abiotic factors on a controlled population of trout. Graph the range of tolerance data below for steelhead trout. Each graph should be completed separately. Water temperature and dissolved oxygen are independent variables, and should be graphed on the x- axis. The number of fish, a dependent variable, should be on the y-axis. Number of Fish Counted Water Temp. (°C) 1 1 2 3 4 10 15 21 7 8 24 9. 20 10 17 11 14 12 12 13 10 14 8 15 16 3 17 18 19 20 1. The optimal range is the amount of an abiotic factor that produces the highest possible population. For water temperature, this would be about 6-10°C. Label this area on the graph. 2. The zone of physiologic stress occurs when an abiotic factor exists at levels that are too high or low to support normal biotic potential. This would be 3-6°C and 10-16°C. 3. The zone of intolerance occurs when a population is absent (or in this case, nearly absent). This occurs at either extreme of our water temperature graph, below 3°C and above 16°C. 110
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Transcribed Image Text:Steelhead trout, otherwise known as rainbow trout, have seen a population decline in the Westem United
States over the last several decades. There are a wide variety of conditions that are threatening the
population, including pollution, climate change, and invasive species. This activity will look at the
effects of varying two specific abiotic factors on a controlled population of trout.
Graph the range of tolerance data below for steelhead trout. Each graph should be completed separately.
Water temperature and dissolved oxygen are independent variables, and should be graphed on the x-
axis. The number of fish, a dependent variable, should be on the y-axis.
Water
Number of Fish
Counted
Temp.
(°C)
1
2
3
4
10
15
7
21
8
24
9
20
10
17
11
14
12
12
13
10
14
8
15
5
16
3
17
18
1
19
1
20
1. The optimal range is the amount of an abiotic factor that produces the highest possible
population. For water temperature, this would be about 6-10°C. Label this area on the graph.
2. The zone of physiologic stress occurs when an abiotic factor exists at levels that are too high or
low to support normal biotic potential. This would be 3-6°C and 10-16°C.
3. The zone of intolerance occurs when a population is absent (or in this case,
occurs at either extreme of our water temperature graph, below 3°C and above 16°C.
bsent
This
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