Climate change/Global warming
Global warming is the warming of the Earth caused by the greenhouse effect. Greenhouse gases, like methane and carbon, being released into air causing the globe to gradually increase temperature. When light energy from the sun is radiated off of ice or snow on Earth, the greenhouse gases in the atmosphere trap the heat making the Earth warmer.
Because climate change is causing the ice to melt, the Arctic Fox will find fewer dead seals left around by polar bears.
Much of the ice is melting and the homes of the Polar Bears is shrinking. Ice caps serve as a resting area for polar bears when they are hunting for food. It is much harder to live without the ice caps.
The ultraviolet rays kills the algae in the sea, which is eaten by the penguin's food source, krill. If the krill don't have algae to eat, the penguins do not have krill to eat.
why this is important
If the Earth keeps warming, many animals could become extinct
One animal gone effects the ecosystem and the food chain
For example, when the algae eaten by the krill is gone, the krill will have a hard time finding food and the penguins who eat the krill will starve because the krill is gone. Animals that eat the penguins will find to hard to search for food.