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Climate Change & Freshwater Fish

+ Info

+ Info

Meet the Fishes

Variables

brought to you by the National Great Rivers Research & Education Center

Stream Sites

Pond Sites

Electrofishing

The questions

Experiment Time!

What is the Urban Heat Island Effect?

Watch the video to learn more!

Heat Islands Infographic

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+ Info

Temperature

Meet the Researchers

How are cities cooling themselves down?

The link between poverty & Climate Change Impacts

How is Electrofishing Done? Watch this short video to see how Megan and her team collected her fish from the different sites.

Climate Change & Freshwater Fish

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+ Info

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What is the Urban Heat Island Effect?

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Infographic

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- Albedo is the amount of energy from the sun that is reflected off of an object. - Think about it. Do you feel hotter if you wear a black or a white shirt on a hot day?- The albedo effect is a positive feedback loop. A positive feedback loop is when the impact of the starting signal is amplified over time. - Take a look at the diagram on the left. How is the albedo effect a positive feedback loop? - What role do you think that albedo plays in heating and cooling our cities?

What is albedo & how does it affect our planet's temperature?

  • What were you interested in when you were in high school?
  • What made you decide to become a scientist?
  • As a Master's Student at Saint Louis University I was interested in environmental change & the ability of freshwater fish to be able to handle changes in water temperature.
  • I want to help restore wetlands like the great rivers around St. Louis and am now studying how energy flows between different organisms in food webs in the San Francisco Bay and Delta in California.

PhD Candidate, UC Berkeley

Dr. Jason Knouft

Scientist, National Great Rivers Research and Education Center

Megan Pagliaro

  • What were you interested in when you were in high school?
  • What made you decide to become a scientist?
  • In my research lab we create computer models to take what we currently know about how humans have impacted wetland ecosystems and then predict how they will change in the future. Our goal is to create strategies that will improve these wetland ecosystems in a way that will require little human input. This is the essence of sustainability.

Interested in learning more about their research? Click on the YouTube icon.

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  • Maximum Water Temperature (MWT): the maximum water temperature that each site reached between July 11th and August 10th, 2018;
  • Critical Thermal Maximum (CTMax): the critical thermal maximum is a measurement of each fish species' tolerance to extreme temperatures;
  • Percent Urbanized: percent urbanized is a measurement of how much of the land surrounding each site has been developed into a town or city.

What did Megan measure in her experiment?

Central stonerollers are a type of minnow that are often used as bait. Mostly active during the daytime, central stonerollers are typically found in large groups known as schools.

Meet the Fishes!

Central Stoneroller (Campostoma anomalum)

Bluegill (Lepomis macrochirus)

Bluegill are a type of sunfish and are typically found in ponds. These fish are common in Missouri and Illinois and are a species that is frequently stocked at fisheries for anglers.

to furnish with stock, as a farm with horses, cattle, etc.

Learn more about me here!

Learn more about me here!

  • What were you interested in when you were in high school?
  • What made you decide to become a scientist?
  • As a Master's Student at Saint Louis University I was interested in environmental change & the ability of freshwater fish to be able to handle changes in water temperature.
  • I want to help restore wetlands like the great rivers around St. Louis and am now studying how energy flows between different organisms in food webs in the San Francisco Bay and Delta in California.

PhD Candidate, UC Berkeley

Dr. Jason Knouft

Scientist, National Great Rivers Research and Education Center

Megan Pagliaro

  • What were you interested in when you were in high school?
  • What made you decide to become a scientist?
  • In my research lab we create computer models to take what we currently know about how humans have impacted wetland ecosystems and then predict

Data has already been collected from several sites, but Ms. Pagliaro needs your help gathering it from a few more. Make sure to be careful with your data collection and write the information down clearly.

Stream Sites

Click on the stream under each site number to gather the following information in the table on your sheet:

  • Maximum water temperature (°C)
  • CTMax (°C)
  • Percent urbanized

Site 4

Site 3

Site 5

Site 6

Site 1

Stream Site 1: Clear Creek Maximum water temperature (°C): 30.02 CTMax (°C): 36.5 Percent urbanized: 10.63

Site 2

Stream Site 2: Flat River Maximum water temperature (°C): 28.37 CTMax (°C): 35.5 Percent urbanized: 14.00

Stream Site 3: Grand Glaize Maximum water temperature (°C): 32.34 CTMax (°C): 36.9 Percent urbanized: 98.77

Stream Site 4: Huzzah Creek Maximum water temperature (°C): 27.26 CTMax (°C): 36.5 Percent urbanized: 4.09

Stream Site 5: Sebago Maximum water temperature (°C): 33.14 CTMax (°C): 36.7 Percent urbanized: 100.00

Stream Site 6: Spring Creek Maximum water temperature (°C): 19.96 CTMax (°C): 36.2 Percent urbanized: 12.47

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Data has already been collected from several sites, but Ms. Pagliaro needs your help gathering it from a few more. Make sure to be careful with your data collection and write the information down clearly.

Pond Sites

Click on the pond under each site number to gather the following information in the table on your sheet:

  • Maximum water temperature (°C)
  • CTMax (°C)
  • Percent urbanized

Site 6

Site 5

Site 3

Site 4

Site 1

Pond Site 1: Whiteside Maximum water temperature (°C): 31.17 CTMax (°C): 36.6 Percent urbanized: 4.82

Pond Site 2: Tilles Maximum water temperature (°C): 33.01 CTMax (°C): 36.6 Percent urbanized: 100

Pond Site 3: Fire Lake Maximum water temperature (°C): 31.98 CTMax (°C): 36.2 Percent urbanized: 33.18

Pond Site 4: Blackjack Maximum water temperature (°C): 32.70 CTMax (°C): 37.1 Percent urbanized: 84.12

Pond Site 5: Busch Lake 30 Maximum water temperature (°C): 32.50 CTMax (°C): 36.7 Percent urbanized: 28.14

Pond Site 6: Lincoln Maximum water temperature (°C): 32.70 CTMax (°C): 36.3 Percent urbanized: 5.96

Site 2

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Megan and Jason monitored each fish to note the exact time and temperature at which they were no longer able to stay upright in the water (CTMax).

Gathering Data

Special hot water baths were setup and the temperature was slowly raised in the mixing reservoir before being added to the tanks with the fish.

The Questions

Megan wanted to know whether variation in the ability for different fish species to be able to handle increasing temperatures in streams and ponds could be related to increases in water temperature as you travel from the countryside to urban environments. 1. Is there a positive correlation between increased water temperature in streams and ponds and percent urban landcover? 2. Are the two fish species studied responding to increased water temperatures associated with the urban heat island effect??