Polar Bears Going Extinct <ul><li>By: Morgan Bush </li></ul>
<ul><li>Rising temperatures cause sea ice to melt, especially in the summer months when the polar bears are the most active. Polar bears depend on sea ice as habitat for hunting and den’s. </li></ul><ul><li>The problem, sea ice loss also impacts polar bears main food source, seals. Polar bears need our help and protection to ensure a long, healthy future for the species. </li></ul><ul><li>The best way you can help polar bears is by reducing your carbon emission. </li></ul>Dying Out
Gone <ul><li>As climate change melts sea ice, the U.S. Geological Survey projects that two thirds of polar bears will disappear by 2050. This dramatic decline in the polar bear is occurring in our lifetime, which is but a miniscule fraction of the time polar bears have roamed the vast Arctic seas. </li></ul><ul><li>Experts say this not only means a loss of habitat to species like polar bears and loss of livelihood for indigenous peoples but also could speed up global warming as water absorbs heat rather than reflecting the sun's rays back into space. </li></ul>
<ul><li>Dr Martin Sommerkorn, senior climate change advisor at WWF International's Arctic Programme, said: "We are expecting confirmation of 2008 being either the lowest or the second-lowest year in terms of summer ice coverage. </li></ul><ul><li>"This means two years in a row of record lows since we started recording Arctic sea ice coverage. </li></ul>
<ul><li>The trend of melting Arctic sea ice is alarming for the rest of the world. The Arctic is a key factor in stabilizing the global climate so this is a global problem that demands an immediate and global response." </li></ul><ul><li>The area of ice that is at least five years old has dramatically fallen by more than half since 1985. It comes, as the Northwest Passage, over the top of North America and the Northeast Passage, in Russia, are both free of ice for the first time . </li></ul>
Integral Link <ul><li>Melting </li></ul><ul><li>Sea ice is an integral link to the polar bear habitat in relation to hunting, feeding, breeding and traveling. Arctic ice is a massive chunk of frozen seawater that floats on the surface of the ocean. In some areas, it melts with the polar seasons. </li></ul><ul><li>Fast </li></ul><ul><li>Sea ice becomes more stable with distances farther from shore and can reach thicknesses of eight feet or more. Polar bears use sea ice as a stage for obtaining food, with the most abundant area for food being in the shallower regions. Deep areas of the sea provide a stable platform of sea ice </li></ul>
For hunting but do not provide a prolific food supply. A polar bear's primary food source is seals; however, a polar bear will feed on walrus and whales. They typically sit and wait on the ice beside breathing holes to catch seals when they come up for air. Over the last several decades, the Polar Regions have experienced an accelerated change in global warming, which results in sea ice melting at a faster rate. Natural factors play a role, however, it is suggested that the increased rate of melting is primarily due to man-made emissions and greenhouse gases.
Affecting more than just Polar Bears The decline in sea ice is beginning to affect human activity as well as animals that rely on the sea ice for biological habitat. This decline not only affects animal activities: Recent studies indicate the polar bear population has declined as well. American bears eat through the summer so they can hibernate through the winter. Polar bears eat through the winter to store an ample supply of fat to get them through the summer season. Spring is typically when polar bears do most of their eating. With warmer temperatures, the spring season does not last as long and with the melting of sea ice; polar bears are forced to move inland where there is an insufficient food supply. Although polar bears do eat some vegetation, their primary food for fuel storage is the fatty tissue of seals and whales. When they are forced to stay on the shores longer, they do not have opportunities to store enough fat for energy fuel to keep them going until the sea ice refreezes and they can feed on seal once again