On the Brink of Extinction

INTRODUCTION Biodiversity is the vast diversity of all life on Earth and the interrelationship that supports these forms of life. This amazing diversity supports human survival by providing valuable resources such as food, fuel and medicine. Many of these resources can not be duplicated by humans. For these reasons, it is clear that the environment and biodiversity it supports are harmful to human survival. The biggest problem everyday is the huge amount of biodiversity and service and a decrease in profits.

Since the end of the nineteenth century when humans are endangered the European Atlantic blue whale (Eubalaena glacialis), the prospects for this kind of long-term survival are disappointing. However, this year's situation is clearly getting worse. After 17 people died, the birth season for 4 months ended at the end of March, and the birth has not been recorded. Thousands of blue whales are roaming in the north Atlantic before uncontrolled whaling. Whaling started by 1530 and intensified to an unsustainable level along the east coast of the United States in the middle of the 17th century. For the next 2 nd half century, it will at least occasionally continue through the North Atlantic.

In the 1920's, whales looked for whale oil which is in danger of extinction. From 1900 to the mid-1960s, about 360,000 blue whales were slaughtered. They eventually were protected by the International Whaling Commission in 1966, but since then they only made a small recovery.

One generation of over-fished and unmanaged fishery removes most large fish from the ocean and places many whale species in danger of extinction. These are the most visible effects on marine biodiversity, but scientists began to understand the complex dynamics contained in this vast waters in greater detail. For example, if an area loses a carnivore such as a shark or bluefin tuna, or an important species like sea otter, it brings a chain effect across the ecosystem and affects all the animals and plants in that area. Scientists have known for a long time that this process is called "nutrition cascade", but current research shows that this effect is far deeper than they think.