تتحدث هذه المقالة باللغة الانجليزية حول الأنواع المهددة بالانقراض والتي يأتي على رأسها الدب القطبي الذي يعد من أكثر الحيوانات سرعة في الاختفاء من العالم وذلك لعدة اسباب أهمها الاحتباس الحراري. وقد وصل الأمر أخيرا بالجمعيات المهمتمة في هذا الصدد لاضافة الدب القطبي في ربيع العام 2008 كأحد أكثر الكائنات الحية المهددة بالانقراض.
Polar Bear endangered:
In Spring 2008, the polar bear was placed on the endangered species list. According to the Endangered Species Act, an endangered species is an animal that is likely to face extinction in its natural habitat. Polar bears have been categorized as a “threatened” species. The ESA defines a threatened species as one that is likely to become “endangered” in the foreseeable future.
The polar bear is the first animal that has been classified as endangered due primarily to global warming. Global warming is caused by carbon dioxide and other greenhouse gases that become trapped in the atmosphere. Heating homes, driving cars, and burning garbage all require fossil fuels that lead to global warming.
he polar bear’s habitat is more vulnerable to global warming than many other species. Polar bears live mainly on the sea ice in the Arctic. This is where they hunt for fish and build up fat reserves. When the ice melts many polar bears move to land and live off their stored fat. In the Arctic, global warming is causing the ice to melt slightly earlier and form slightly later. This results in a shorter feeding season for the polar bear. Some risk their lives to find ice. If they have to swim too far they will drown from exhaustion and hunger. The World Wildlife Fund estimates that 25% of the Arctic sea ice has disappeared in the past 30 years.
It is important that animals such as the polar bear make it onto the endangered species list. Once they are on the list there are laws that protect these animals from being hunted for food or sport. Agencies also receive money and tools to protect the habitat and recover the species. The goal of removing the animal from the list is often achievable. Since the Endangered Species Act was introduced in the US in 1973, many species have been taken off the list due to increased populations. In fact, it is rare for a species to go extinct after they make the list. Sadly many species do go extinct while waiting for consideration
ليست هناك تعليقات:
إرسال تعليق