The Daily Barometer, Thursday, December 3, 2015

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VOL. CXVIII, No. 56

DailyBarometer.com

Thursday, December 3, 2015 Oregon State University

Dead zones threaten oceans

Contributed by SE Alaska Scientific Party

Alaska glaciers on the move; Hubbard Glacier is pictured here durring a calving event. Calving is when chunks of ice break off at the terminus, or end, of a glacier.

Low oxygen zones linked to ocean warming, stunt organism growth By Lauren Sluss News Contributor

Low oxygen dead zones are threatening ocean life off coasts in the Pacific Northwest according to researchers at OSU. Dead zones are areas of hypoxic, or non-oxygenated, areas of water within the ocean, that stunt the growth of organism. These dead zones have been speculated to be caused by ocean warming, however evidence backing that claim has proved to be limited. “We started seeing ‘dead zones’ of hypoxic water offshore Oregon in the summer starting in 2002,” said research assistant in the College of Earth, Ocean

and Atmospheric Sciences Maureen Walczak. “They kill almost all marine life that can’t get out of the way fast enough, and as time goes on they’re getting bigger and worse.” According to principle investigator of the study Alan Mix, a few dead zones have appeared off the coast of Oregon, which prompted the research team to investigate their causes. “There has been some speculation that these dead zones have been related to climate change, but it’s really hard to prove what are random events and what has direct cause,” Mix said. However, this study established a clear connection between two prehis-

toric instances of sudden ocean warming and an increase of marine plankton sinking to the ocean floor, ultimately leading to dead zones, according to associate professor of integrative biology Francis Chan. “In this case, the researchers found that once oxygen starts to decline in the layer of the ocean that is poorest in oxygen, it appears to have triggered the release of nutrients that further amplified the decline in oxygen,” Chan said. According to Mix, the first step in this research was determining the extent of previous ocean warming through the use of paleoclimatology and paleoceanography, both of which use past occur-

rences to explain present issues, using sediments in the ocean floor. “You can think of the sediments as tree rings—each layer accumulates over time and marks what was happening at that time period. It tells time, just like reading a book,” Mix said. Mix and his research team developed chemical tracers to determine the temperature, oxygen levels and organism life during these prehistoric instances of sudden ocean warming. “What we came up with is a record of how temperature has changed through time, which is done through some fairly exotic chemistry using chemical trac-

See Zone, Page 2

Getting to know your student leaders ISOSU co-directors Tina Kieu, Sakura Hamada serve OSU By Chloe Stewart News Contributor

This year, the International Students of Oregon State University is led by co-directors Tina Kieu and Sakura Hamada. Both took on their positions as co-directors of ISOSU this year. Kieu is a fifth-year senior majoring in biology and Hamada is a senior studying human development and family science. According to the duo, their responsibilities as co-directors are broken down into two jurisdictions: Kieu works with domestic students working in ISOSU affiliate | Brian nguyen THE DAILY BAROMETER programs. Hamada works to highCo-directors of ISOSU, Sakura Hamada, senior in human development and family sciences and Tina light and connect international Kieu, senior in Biology pre-medicine, in the ISOSU office located in the Student Experience center. students.

IN THIS ISSUE >>>

This year, with new spaces at their disposal and new goals in mind, Kieu and Hamada said that they are working to rebuild and update the ISOSU programs. This rebuilding, according to Kieu and Hamada, involves building more intent behind their work and respecting the student fees that fund their work. They hope that ISOSU can help students make connections and learn more about the communities around them. “We are trying to accommodate the changing and transforming international community,” Kieu said. “The students are starting to change, people are starting to become more globally minded, international students are trying to reach out to maybe more traditional and domestic students, and as we’re transforming, we need to

See Leaders, Page 6

Microsoft gains board members, NEWS, PAGE 3 Wresting heads to Vegas, SPORTS, PAGE 4 Best picture of 2015, A&E, PAGE 7


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