Scientists believe that it is not far off the time when the Arctic basin will be completely freed of ice in the summer season. The Arctic as a stability factor for the climate of the planet is also unique catalyst. The reduction of Arctic sea ice leads to an additional global warming and the greenhouse effect. World Wildlife Fund (WWF) called for acceleration of negotiations on international a new treaty to save the Earth's climate, which must be signed in Copenhagen, convened in December 2009. According to experts, the melting of glaciers in the planet's oldest means that the ice polar cap gets thinner and younger. As a consequence of these processes, such as the Canadian population dropped from gulls in 1980 to 80 percent. Due to the expansion of the water space, free of ice, shrinking population of walruses in the Chukchi Sea. Animals gather in colonies off the coast of the peninsula of the same name, they lack food, increasing the risk of infection.
Last year, the coastline length of 250 km was found over a thousand dead walrus … Scientists believe that the fires help to preserve the biodiversity of the Australian desert Scientists from Stanford University and the University of Utah in the United States as a result of their long-term studies have concluded that the fires that regularly arrange Australian Aborigines in the west of the continent, not only do not harm the ecosystem of the region, but also help to preserve the diversity of plants and animals. The results showed that the areas that are subject to regular artificial fires, there is a greater diversity of species than in areas where fires occur only on the lightning. According to scientists for a long time since the appearance of modern humans in Australia form, producing their own food with arson, the continent's ecosystems were formed, which was adapted to regular fire and support in this situation biological diversity. Wasps are able to learn and memorize each other Not long ago it was thought that social insects such as wasps, bees and ants live in colonies, and though, can not distinguish each other, now, Research by zoologists from the University of Michigan, found that it is not so.
It turns out that the wasps are able to recognize each other's 'face' and to remember about dealing with certain special even in a week. Scientists have observed the behavior of paper wasps polystyrene (Polistes fuscatus), which lives in colonies and builds the nest with combs. Scientists have found that females in polystyrene are more aggressive toward strangers than to members of his family. It was also found that the wasps remember those wasps, with whom they fought, at least a week. For the experiment, the scientists collected 50 unrelated females polystyrene, which were kept in pairs in a single container for a day, and then separated. Once in the container, wasps fought, and then installed the 'loving' relationship. A week later after the separation of these wasps again put in a container, they retain the 'peaceful' nature of the behavior, although meetings with unfamiliar individuals continued to show aggression. A new study shows that complex social behavior may have deeper roots in animals than previously thought. To view the complete version of the article and discuss its you can be found here: ECOportal.ru