Climatic changes threaten the sources of drinking water. Many fresh water
resources are "polluted" by the water flowing from the sea. The changes
in hydrosphere affect not only the man but they also concern the plants. The
water plants that absorb carbon dioxide may suffer a lot as the ability of water
to dissolve this chemical substance decreases if the temperature rises. High
temperatures are also killing to coral reefs. Moreover, the flood of the coastal
areas may have a negative effect on some species of animals such as turtles
which lay their eggs on the beaches. Turtles are only one of many species threatened
by global warming. Still growing temperatures are dangerous to 1/3 ecosystems
on the Earth. We can already observe a disconcerting phenomenon e.g. the migration
of some species to the North or to the higher parts of the mountains or the
decline in population which leads to a complete extinction.
Climatic changes may also disorganize the life cycle of other cohabitating species (e.g. a butterfly living in the North Mexico and South California became extinct because the flowers faded and left its larva without food).
The most endangered species are left with no "way out". Seals and polar bears that live in the getting warmer arctic areas have nowhere to go as everywhere else the climate can only be warmer.
Global warming destroys the balance of many ecosystems. The scientists assume that in the nearest half of the century even one million of species of plants and animals living on the Earth can become extinct. Amongst the most endangered we can see: polar bears and tigers of Bengal.
It is the north that should be examined closer to learn more about the species which can be fatally affected by the climatic changes. The following species should be mentioned.
- POLAR BEAR
It lives on the Arctic area and it uses the iceberg floating in the sea to hunt on it. The glaciers of Arctic melt extremely quickly which is dangerous to the natural environment of the bear and its whole population. The scientists assume that the ice in the North Pole many possibly disappear during 50-100 years. Then, we will have a chance to see a polar bear in the ZOO only.
- THE TURTLE
It lays the eggs on the Brazilian beaches. Many of them may be soon covered by the still rising waters of the ocean. Another danger for the turtles are growing temperatures which cause that more females than males hatch from the eggs.
It is the only Asian ape living in Indonesia. Unfortunately, it looses its natural environment because of fires of the forest and intensive deforestation..
-THE AFRICAN ELEPHANT
Similarl to the orangutan it has less and less space to live. Long and not rare periods of drought are also a menace to it. Besides, climatic changes may have a negative influence on the breeding of the elephants as the lack and excess of food destroys the hierarchy in the herd and decides which animals can breed in the future.
-THE BIG PANDA
Its population is less than 1000 specimen. It lives in the mountainís forest in the central China and eats mainly bamboos. That is why the Big Panda is threatened to loose main source of food.
THE CORAL REEF
They disappear mainly due to the growing temperature of water. The omen for the reef's death is its fading which affected huge fragments of the Great Barrier Reef at the coasts of Australia.
It is necessary to add one more danger to those listed above. Namely, the fact of dislodging one species by another living on the territory for ages e.g. at the coast of an arctic island Bisoe the penguins Adel whose population reaches 1000 nesting pairs, are now being replaced by the Papua penguins which come from the areas with mild climate. Another example are the foxes from Canada which migrate at the distance of hundreds of thousands kilometers. They also move to the places inhabited by polar foxes