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Minnesota is known to many people by its state slogan, Land of 10,000 Lakes. Determined to maintain its reputation as a recreational haven and an unspoiled home for wildlife, the state pays due diligence in keeping its waters pure. Gallaudet biology majors Carolina Kohn and Scott Symes recently contributed to the effort through an internship where they monitored water quality in five major lakes.
All around the world, pristine lakes that once teemed with fish have slowly choked and died after becoming polluted by industrial chemicals, fertilizers, even unwanted prescriptions that people thoughtlessly flush down their toilets and eventually find their way into bodies of water. Not only can swimming in a contaminated lake make people sick, pollution leads to massive fish kills, infects aquatic life with toxins that makes it dangerous for people or animals to eat them, and causes bizarre genetic mutations, such as fish being born with two heads or sharing male and female reproductive organs.
Understanding that the best way to keep lakes healthy is by prevention rather than treatment, Minnesota has an aggressive plan to monitor the quality of its lakes. Maintaining a lake’s water quality can be challenging, however, because once a pollutant enters, it can quickly disperse through the water.
“Rain runoff can carry chemicals into the lake, causing algal blooms, like when fertilizers seep into the lake,” said Symes, a junior from St. Paul, Minn. He explained that too many nutrients create algal blooms that are harmful to aquatic life, pets, and people. Swimmers and boaters who are exposed to these toxins can get skin rashes, digestive problems-or worse.
Compounding the health of a lake are boat landings, which allow boats to be transported from one lake to another, and therefore introduce pollutants from a contaminated lake to a clean one.
Kohn and Symes were joined in their lake studies by Gallaudet chemistry professor Daniel Lundberg. They collected chemical and biological data from the lakes and sent water samples to a lab for analysis. “We also measured dissolved oxygen and water temperature,” said Kohn, a senior from Turin, Italy, and determined water clarity. The results of these factors combined indicate a lake’s Trophic Status Index (TSI): the lower the index, the clearer the lake water.
The interns also devised a net to capture zooplankton, one of the smallest microorganisms that live in water, and viewed them under a microscope. Zooplankton are a crucial food source for fish, and they are sensitive to changes in lake health, such as pH levels, pollution, and algae. Zooplankton also eat algae, so they are beneficial to the lake by keeping the algal population at bay.
Collecting water samples is a painstaking task, and since the lakes are so large, a time-consuming one. The issue was solved by A.W. Research Laboratories (AWRL), which has a plane with cameras that measure TSI values for an entire lake. The interns and Lundberg were grateful for the opportunity to work on their project with AWRL.
Kohn and Symes shared their findings with adjoining lake property owners, and, thankfully, all of the lakes sampled had the desired TSI.
Both internships were supported by the Gordon Brown fund, managed by Gallaudet’s Career Center. Juniors or seniors who are chemistry and biology majors are preferred for an internship, but anyone who has an interest in the environmental sciences is eligible.
Symes said his goal is to work a year in the ecology field before entering graduate school, and Kohn plans to specialize in education and environmental science.
Roberto E. Wirth, E-’74 & H-’09, passed away on June 5 in Rome, Italy. Mr. Wirth was owner and managing director of the Hotel Hassler in Rome, one of the most prestigious family-owned hotels in the world, and owned several other hotels and resorts throughout Italy. He was a strong advocate for deaf people in...
Alumnus Timel Benton has signed a contract with the Bay Area Panthers of the Indoor Football League (IFL). Benton, who graduated last month, is the first Gallaudet Bison to sign a professional football contract since Tony Tatum signed on with the Utah Blaze in the now-disbanded Arena Football League (AFL) in May 2013. Benton was...
James Caverly, ’11, who plays Theo Dimas in Hulu’s Only Murders in the Building, will play Professor Harold Hill in the Olney Theatre Center’s summer production of Meredith Willson’s Tony-winning musical The Music Man, which opens tonight and runs through July 23. The show’s official opening is on Thursday, June 23. Sandra Mae Frank, ’13,...
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