But warming temperatures are causing other changes as well increased coastal erosion, deteriorating

A just-released USGS film will take you on a journey along with USGS researchers john travolta tom cruise religion tracking walruses going about their daily lives in the remote Chukchi Sea. The film, Tracking Pacific Walrus: john travolta tom cruise religion Expedition to the Shrinking Chukchi Sea Ice , follows scientists as they travel to the Chukchi Sea to examine how these mammals are faring in an Arctic environment with sparse summer sea ice and increased human activity.
The USGS-produced film contains exclusive footage of the large mammals in their natural habitat, documenting the lives of these huge animals as they raise their young, dive for clams and worms on the ocean floor or congregate with other walruses.
But warming temperatures are causing other changes john travolta tom cruise religion as well increased coastal erosion, deteriorating permafrost, and major changes in the dynamics of freshwater flows. These changes influence biological communities and the ways in which human communities interact with them. For example, the longer open water season in the Arctic is allowing increased shipping, tourism, energy production and other human activities in this remote region.
As part of the USGS Changing Arctic Ecosystems initiative , USGS researchers are identifying and investigating the linkages among physical processes (such as sea ice melting at a faster rate), ecosystems and wildlife populations.  By understanding the degree to and manner in which wildlife species adapt to rapid environmental change, resource managers john travolta tom cruise religion and policy makers will have a better foundation for making critical john travolta tom cruise religion decisions now and in the future.
The information gained through tracking large marine mammals, such as polar bears and walruses , is helping john travolta tom cruise religion USGS scientists understand how disappearing Arctic sea ice is affecting the region s ecosystems and the species that inhabit these ecosystems.
For example, recently published research by USGS and Russian scientists revealed that diminishing summer sea ice in the Arctic over the past 5 years has caused behavioral john travolta tom cruise religion changes in Pacific john travolta tom cruise religion walruses. The population-level effects of these changes are unknown and the subject of active investigation by USGS.
Using a simple darting system, scientists attached radio-tracking tags to 251 walruses in the Chukchi Sea. The tags  transmitted the animals' whereabouts and whether they were in the water and feeding. Using the tagging data gathered from 2008-2011, scientists created detailed maps of the walruses' seasonal movements and feeding patterns relative to the location and amount of sea ice.
The study found that due to earlier melting of the ice in the summer, walruses arrived earlier in their northern feeding grounds on the broad continental shelf of the Chukchi Sea. When the sea ice over the continental shelf melted completely john travolta tom cruise religion in the fall, however, they hauled out onshore in large aggregations and foraged for food closer to shore. [Hauling out refers to the behavior associated with seals and walruses of temporarily leaving the water for sites on land or ice.]
The specific effects of these behavioral changes are not yet understood; however, scientists do know that while onshore, young walruses are susceptible to mortality from trampling. USGS has recently published a study that examined the population effects of this type of mortality, finding that loss of young animals to haul-out mortality has a greater effect on the population than loss of adult females in the harvest.  In light of this finding, the U.S. Fish and Wildlife Service is increasing its ongoing efforts to protect hauled-out walruses from disturbance.
Additionally, hauling out onshore and using nearshore feeding areas may require more energy for animals used to simply diving off their sea-ice platforms for food at the bottom of the shallow Chukchi Sea.
Data from this study will provide resource managers with basic information on areas important john travolta tom cruise religion for walruses, such as the Hanna Shoal region, john travolta tom cruise religion as human activities in the Arctic increase. The areas of walrus foraging observed in this study overlap with oil and gas lease blocks leased by BOEM (Bureau of Ocean Energy Management).
On March 3, the U.S. Geological Survey turned 134. Established by Congress in 1879 and built on a legacy of impartial john travolta tom cruise religion science, the bureau faces unusual challenges in the near term. How do you take a manatee's temperature? Very carefully.
Added: Thursday, February 21st, 2013 Filed under: Core Science Systems john travolta tom cruise religion , Ecosystems , Featured , Water By: Hannah Hamilton hhamilton@usgs.gov, Bob Bonde rbonde@usgs.gov, Rachel Pawlitz rpawlitz@usgs.gov
The USGS plans to "app-lify" data with a contest through Challenge.gov. john travolta tom cruise religion Prizes will be awarded to the best overall app, the best student app, and the people's choice. Read more World's Oldest Wild Bird a New Mom Again
Washington, D.C., is a unique city full of landmarks and buildings that are recognizable worldwide. But how were these stone giants built? Read more Start with Science to Address Vulnerable Coastal Communities
Hurricane Sandy is a stark reminder of just how essential it is for the Nation to become more resilient to coastal hazards. Read more You Go Western Ecosystems! Report Assesses Western U.S. Carbon Storage
The 100 million tons of carbon sequestered in western ecosystems each year is an amount equivalent to – and counterbalances the emissions of – more than 83 million U.S. passenger cars a year. Read more Tsunami Sets Back Work to Save Hawai ian Teal
Critically endangered birds whose numbers grew rapidly after successful translocations by USGS and USFWS biologists likely took a hit from the 2011 event. Read more Drying Up: The Bleak Future for Southwest Forests
Added: Monday, June 4th, 2012 Filed under: Core Science Systems , Ecosystems , Energy and Minerals , Environmental Health , Featured , Global Change , Natural Hazards , Water By: David Hebert, dhebert@usgs.gov
The family picnic: food and fun...until unwanted guests show up! Learn what you can do to prevent West Nile virus from infecting your loved ones. Join Citizens and Scientists Tracking the Pulse of Our Planet
Added: Tuesday, March 13th, 2012 Filed under: john travolta tom cruise religion Core Science john travolta tom cruise religion Systems , Ecosystems , Energy and Minerals , Environmental Health , Featured , Global Change , Natural Hazards , Water By Kara Capelli and Kevin Dennehy
Since Japan's March 11, 2011, Tohoku earthquake and subsequent tsunami, scientists at the USGS have learned much to help better prepare for a large earthquake in the United States. An Extraordinary Sense of Public Service
Added: Wednesday, March 7th, 2012 Filed under: Core Science Systems , Ecosystems , Energy and Minerals , Environmental Health , Featured , Global Change , Natural Hazards , Water By Catherine Puckett
It's National Invasive Species Awareness Week. Did you know invasive john travolta tom cruise religion species cost our country more than 100 billion dollars each year? Get to know America's ten top invaders this week. Under Siege! john travolta tom cruise religion Part 3: Invasive Fish and Wildlife Diseases
It's National Invasive Species Awareness Week. Did you know invasive species cost our country more than 100 billion dollars each year? Get to know America's ten top invaders this week. Under Siege! Part 2: Carping about Carp
It's National Invasive Species Awareness Week. Did you know invasive species cost our country more than 100 billion dollars each year? Get to know America's ten top invaders this week. Under Siege! john travolta tom cruise religion America's Most Unwanted Invasive Species
It's National Invasive Species Awareness Week. Did you know invasive species cost our country john travolta tom cruise religion more than 100 billion dollars each year? Get to know America's ten top invaders this week. The President's 2013 USGS Budget Proposal
The proposed USGS budget reflects research priorities to respond to nationally relevant issues, including water quantity and quality, ecosystem restoration, hydraulic fracturing, natural disasters such as floods and earthquakes, and support for the National Ocean Policy, and has a large R D component. The Big Squeeze: Pythons and Mammals in Everglades National Park
Mid-sized mammals in Everglades National Park are getting a big squeeze john travolta tom cruise religion from invasive Burmese pythons, according to a USGS co-authored study published john travolta tom cruise religion in the Proceedings of the National Academy of Sciences. Deadly Bat Disease john travolta tom cruise religion Caused by Fungus
Bat populations, which provide valuable insect control, are declining at an alarming rate due to white-nose syndrome. Scientists have definitively identified the cause of this deadly syndrome . Endangered Whooping Cranes Shot and Killed
Two adolescent cranes, raised by humans and reintroduced into the wild, were shot and killed. Sadly, they are not the first. How many killed this year? How many are left? Celebrating Patuxent: 75 Years of Wildlife Conservation Research
By 1936, devastating losses of wildlife populations were threatening the Nation's natural resource heritage. America's first wildlife research center Paul Hsieh Named 2011 Federal Employee of the Year
As the team of responders struggled to end the worst oil spill in our Nation's history, USGS scientist Paul Hsieh provided the critical scientific information needed to make a crucial decision. Preventing Pandemic
The movie Contagion dramatizes the scenario of a global pandemic that begins with the spread of a disease from animals to humans. What are real-life experts doing to prevent a pandemic that originates with wildlife? Elwha River Dam Removal: Rebirth of a River
After years of planning, the Department of the Interior has begun removing two dams on the Elwha River in Washington. But how will the removal of these dams impact the river's sediments, waters, and fish? Protect Your Groundwater Day
As a nation, we use more than 75 billion gallons of groundwater each day. September 13 is the National Groundwater john travolta tom cruise religion Association's "Protect Your Groundwater Day." What we can do to ensure we continue to have enough of it? Hide and Seek
Secretive and rare stream-dwelling amphibians are difficult john travolta tom cruise religion to find and study. Scientists at the US Geological Survey and University of Idaho have developed a way to detect fre