Презентация на английском языке на тему: «Озеро Байкал/Lake Baikal»

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Презентация о озере Байкал — Чтобы распечатать эту презентацию ее можно скачать бесплатно. Скачать презентацию

Lake Baikal​
Lake Baikal is located in Russia, the southern part of Eastern Siberia.​
It is the deepest lake in the world.​
The largest natural reservoir of fresh water.
Baikal is located on the border of the Irkutsk region and the Republic of Buryatia.​
The lake stretches from north to south-west by 636 km. Width of the lake ranges from 25 to 80 km.
Into Baikal 336 permanent rivers and streams.​
The greatest volume of water entering the lake from the Selenga River. A consequence of Baikal only river Angara.
Baikal area 31470kv.km. The maximum depth is 1637m​
To represent the vast water body of Lake Baikal, we note that the Angara need 387 years of continuous operation to drain its water bowl, provided that during this time into the lake or get any liters of water.
The volume of water in Lake Baikal 23,000 cubic meters. km
This represents 20% of the world and 90% of Russian reserves of fresh water. Water in the lake is more than in all 5 Great Lakes (Superior, Michigan, Huron, Erie and Ontario).
From January to April, the lake is usually covered with ice.
Baikal water is unusually transparent, pure and saturated with oxygen. Spring water clarity is 40m.
The lake has 52 species of fish, of which 27 are endemic. Most popular: Siberian sturgeon, cisco, whitefish, perch, dace, catfish, carp, burbot, golomyanka.
Golomyanka
Golomyanka-transparent fish without scales and swim bladder,​
35% consists of fat​
Found only in Lake Baikal and belongs to a class of viviparous.​
Golomyanka capable of producing up to 2,000 small fish.
The name of the fish comes from the word «golomen», which means «high seas» .Golomyanka «flies» through the pectoral fins with a wide-open mouth.
Baikal cisco
Latin name Baikal cisco translated as «wandering» sig.Nazvanie sluchayno.Uchnye not believe that cisco penetrated into Baikal in the interglacial period of the seas of the Arctic Ocean.
Baikal cisco is endemic, ie. not found anywhere except Lake Baikal.​
Baikal cisco divided into several populations. Most popular-Selenga and Barguzin.
Baikal Seal
One of the three freshwater seal species in the world. Endemic to Lake Baikal. The average length of an adult seal -165 cm. Weight: 50 to 130 kg. Speed in a tranquil setting of 7-8 km / h. The maximum speed of 20-25 km / h (develops when away from danger). On a solid surface moves slowly, turning fins and tail.
Cubs are born in mid-March. Usually a baby seal born weighing up to 4kg. Skin cub silver. About 4-6 weeks the baby spends inside the lair, eating his mother’s milk.
Scientists believe that the seal has penetrated into Baikal from the Arctic Ocean to the Yenisei and Angara in the Ice Age.
Nerpa winters on ice lairs under the snow. She can breathe through the vents, the air holes. Seal makes them raking claws ice forelimbs.
From coastal animals are most common: bear, deer, elk, moose.
Roe deer, musk deer, hare, wolf, fox
On Baikal live many birds: loon, Dalmatian pelican, cormorant, egret,
Black stork, partridge, grouse, eagle
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