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Polar Bear Response to Sea Ice Loss

Update

Meet the Team

Teacher - Cristina Galvan

Cristina Galvan's picture
Impact Academy of Arts and Technology
Menlo Park , California
United States

From an early age, Cristina Galvan has loved nature. She grew up camping every summer in Yosemite with her family. Ms. Galvan received her bachelor’s degree in integrative biology from the University of California at Berkeley, and continued her graduate studies through the Stanford University Teacher Education Program. She recently joined the staff at Impact Academy of Arts and Technology in Hayward, California. She has taught Integrated Science, Biology and Physics. She works hard to provide a rigorous but supportive curriculum for her students, many of whom will be the first in their families to attend college. In her spare time, Ms. Galvan enjoys cooking, yoga, hiking, reading, traveling, and, at times, playing video games. She is excited to be part of PolarTREC and looks forward to sharing her experiences with her class and other teachers.

Researcher - Merav Ben-David

Merav Ben-David's picture
University of Wyoming
Laramie , Wyoming
United States

Merav Ben-David is an associate professor in the Department of Zoology and Physiology and the Ecology program at the University of Wyoming. After receiving both her bachelor’s and master’s degrees at the Tel-Aviv University in Israel, she received her PhD at the University of Alaska in Fairbanks in 1996. Dr. Merav Ben-David primarily studies carnivores and her research interest revolves around the interaction between animal behavioral ecology, population dynamics, and ecosystem function.

Researcher - Henry Harlow

Henry Harlow's picture
University of Wyoming
Laramie , Wyoming
United States

Henry "Hank" Harlow is a zoology and physiology professor at the University of Wyoming. Dr. Harlow’s research emphasis is on the physiological adaptations of animals living in stressful environments and the health of animals experiencing various states of hypothermia. These research interests have included studies on Komodo dragons in Indonesia, hibernating black bears in the near arctic and now, polar bears that may be expressing a form of “walking hibernation” during summer ice free months in the Arctic.

Researcher - John Stone

John Stone's picture
University of Washington
Seattle , Washington
United States

Dr. John Stone is a geologist with a particular interest in cosmic-ray-produced nuclides, or very small particles which come to earth from outer space. Working with students and collaborators, he is involved in several projects in Antarctica aimed at dating and understanding the history and changes in the glacial landscape. Other projects Dr. Stone is involved in strive to understand ancient landscapes in Australian, South America, the U.S. Pacific northwest, and Britain. To learn more about Dr. Stone's scientific interests, please visit his faculty biography page (http://depts.washington.edu/cosmolab/people.html).

Journals

November 1-2, 2009

Sunrise: depends on where I was...Sunset: depends on where I was... The last two days have been bitter sweet - while I am very excited to be on my way home, I am also very sad that my adventure is coming to end. The final morning on board the Polar Sea was spent packing the final pieces of gear...

October 31, 2009

Location: Lat: 73 40.564 N Long:  161 02.401 W Sunrise: 12:08 pm Sunset: 4:42 pm Today was the final day of the trip on the Polar Sea before we disembark tomorrow. We spent the last day and night traveling over 200 miles to reach the final location where there were three bears clustered together...

October 29, 2009

Location: Lat: 71 16.503 N Long:  144 18.779 W Sunrise: 10:19 am Sunset: 4:25 pm Over the past week, several members of the science crew on board have been invited to have dinner with the captain. It is quite a honor to be invited to join the captain for dinner. Last week the media crew and...

October 28, 2009

Location: Lat: 71 55.927 N Long:  143 40.160 W Sunrise: 10:18 am Sunset: 4:40 pm I spent the afternoon working with the ice team to help with the coring process. As usual we got all of gear on, including our survival suits. The suits are one complete water tight suit that goes on top of your...

October 24, 2009

Location: Lat: 72 04.433 N Long: 146 45.330 W Sunrise: 9:52 am Sunset: 5:01 pm The winds were relentless again today. Not quite as bad as yesterday, but still much too strong to fly. The forecast for tomorrow is that the winds will die down. However, I used the time today to finally capture one...

Project Information

Adaptive long-term fasting in land- and ice-bound polar bears: coping with ice loss in the Arctic?
Coast Guard Ship, Beaufort Sea
23 September 2009
1 November 2009

Where are They?

The polar bear research team, as well as other marine biologists and oceanographers, will live and work from the USCGC Polar Sea in the Beaufort Sea, tens to hundreds of kilometers north of Alaska. The team will travel via helicopter to and from the ship to approach and conduct sampling on ice-bound populations of polar bears living on thick multiyear sea ice.

What are they Doing?

Polar bears, Ursus maritimus, spend most of their time on the sea ice-where they travel, hunt, and sometimes even give birth. However, during the summer the ice retreats northward and leaves some polar bears on shore for several months. These bears may not be able hunt and may face warmer temperatures than they do on the ice. The research team will investigate how the bears cope with these difficult conditions on shore, and try to determine if they possess adaptations similar to bears that hibernate in the winter.

A research team made up of scientists from the University of Wyoming, United States Geological Survey (USGS), and the United States Fish and Wildlife Service (USFWS) will use the U.S. Coast Guard icebreaker Polar Sea and on-board helicopters to approach polar bears on the sea ice and collect measurements and samples to determine the overall physical condition of the animals. The research team intends to recapture bears that were originally tested in May, to compare data from before and after the summer of 2009. Measurements include weight and length of the bear as well as overall appearance. In addition the researchers will measure body fat, muscle condition, and take blood samples.

Knowing how polar bears adjust when living on shore, and why they may not be able to adjust will provide important information to indigenous people, U.S. and international management agencies, conservation groups, and policy maker's for addressing the polar bear's needs in the future.

Vocabulary

Icebreaker

An icebreaker is a special purpose ship or boat designed to move and navigate through ice-covered waters.

Indigenous People

A term used to describe any ethnic group of people who inhabit a geographic region with which they have the earliest known historical connection.

Sea ice

There are terms for different types of ice. Shorefast ice forms along coasts and is attached to land. Pack ice is ice floating in open water. Multiyear ice is ice that has survived at least 1 summer. First year ice is ice that has not yet survived a melting season.