How Is Climate Change Affecting Polar Bear Life?

Firstly, As the climate warm up or cool down, many of local species shift from their origin habitat into the area where suited the the most (Friedman L.S, 2012). This means that when the temperature is increasing during the summer time, polar bear do migrate to the land area or we called it ashore. According to National Geography, that since 1979 sea ice cover has declined by about 30 percent in the Arctic. As the greenhouse effect continuing to warm the Earth, polar bears forced to stay in the land for longer periods. Staying in ashore for a long period affecting the life of polar bear, not only struggle to adapting but also they may losses weight 60 pounds lighter than the amount average weight (National Geography, 2013). Polar bear life is totally depending on the ice sea. May be some people are wondering the polar bear can adapting life in the land, but scientist has proved that there is possibility they will adapted in land but its take around 50-100 years (National Geography, 2013). Thus, the number of polar bear keeps declining each year. If nothing changes, scientist predicts that by the 2050 two of third polar bear will be gone (BBC, 2014).
Secondly, scarcity of food issues.
The changing of temperature influence their reproduction cycle, growth pattern, and resulting species movement as well as animal interaction (Friedman L.S, 2012). The declining of the polar icecap because of the warm temperature may affect the availability of polar bear prey, which is seal. The decreasing number of the fish that the seal eat near the productive area in the icecap affects their nutrition status and reproduction rates (National Wildlife Federation). The condition where their prey become limited cannibalistic behavior of polar bear occur, because the polar bear are going hungry in the long period of time (Dailymail UK,
2011).