Natural vegetation : Natural vegetation Made by-Chetan Aggarwal INTRODUCTION : INTRODUCTION BY NATURAL VEGETATION OF A PLACE WE MEAN THE PLANTS THAT GROW THERE IN NATURAL CONDITIONS. THESE CONDITIONS INCLUDE THE CLIMATE AND THE SOIL. DIFFERENT REGIONS IN INDIA HAVE DIFFERENT CLIMATE CONDITIONS AND SOIL TYPES. NATURAL VEGETATIONS IN INDIA CAN BE CLASSIFIED IN FIVE MAJOR TYPES;
TROPICAL DECIDUOUS FOREST,
TIDAL FOREST TROPICAL RAINFOREST : TROPICAL RAINFOREST TROPICAL RAINFOREST OCCURS INREIONS OF VERY HEAVY RAINFALL [ MORE THAN 200CM PER YEAR ] . THESE FORESTS ARE VERY DENSE. THEY HAVE MAINLY EVERGREEN TREES, WHICH DO NOT SHED THEIR LAVES ACROSS SEASONS . HENCE THEY REMAIN GREEN THROUGHOUT THE YEAR. THE WESTERN GHATS AND THE WESTERN COAST , PARTS OF WEST BENGAL AND ORRISA , THE NORTH-EASTERN STATES AND THEANDAMAN AND NICOBAR ISLANSHANE SUCH VEGETATIONS. MAHOGANY, CINCHONA AND WILD RUBBER ARE SOME OF THE COMMERCIALLY IMPORTANT HARDWOOD TREES THAT GROW IN THESE AREAS . BAMBOO ALO GROW HERE. TROPICAL DECIDUOUS FORESTS : TROPICAL DECIDUOUS FORESTS Tropical Deciduous Forest is also known as monsoon forest. It is the most common type of forest in India. It occurs over a large part of the country where the annual rainfall varies between 100cm and 200cm. Deciduous trees shed their leaves in the beginning of summer. Forests of teak, sal, palash, peepal, rosewood, sandalwood, ebony and shisham occur in the wetter parts of the Deccan plateau and the northern plains, right upto the foothills of the Himalyas. Bamboo, too, grows in these regions. Thorn forests : Thorn forests Thorn forest, dense, scrublike vegetation characteristic of dry subtropical and warm temperate areas with a seasonal rainfall averaging 250 to 500 millimetres (about 10 to 20 inches). This vegetation covers a large part of southwestern North America and southwestern Africa and smaller areas in Africa, South America, and Australia. In South America, thorn forest is sometimes called caatinga. Thorn forest grades into savanna woodland as the rainfall increases and into desert as the climate becomes drier. MOUNTAIN FOREST : MOUNTAIN FOREST The vegetation in the mountains varies with altitude. In the Himalayas, it ranges from tropical deciduous to coniferous. Coniferous trees such as cedars, pines, and silver fir are generally found at heights between 1500m to 2500m. Coniferous trees are often conical in shape. Also, most of them bear cones and have needle-shaped leaves.
At heights of about 3,000m and above, trees give way to what is known as alpine vegetation of shrubs and grasses. TIDAL FOREST : TIDAL FOREST Tidal forests , or mangroveis found in swampy areas that are cnstantaly washed by seawater during high tides. Such vegetation is found almost all along the eastern coast, especially in the large deltas formed by river life the Ganga, Mahanadi , Godhavari , Krishna and kaveri. The most extensive tidal forest is in the Ganga –Brahmaputra delta .it is called the sundarbans after the sundari, the tree that grow more abudantly in this region. The wood of this tree s durable and is used to make boats. Mangroves are also found in the Andaman and Nicrobar islands. Slide 8: Forests carry out the role of preserving an environment suitable for our livelihood. Let's have a look at their effects. Importance of forests Protecting forests : Protecting forests Forests are the natural wealth of a country, and need to be protected.
At one time forests in india covered a large area.
But cutting down trees for wood and clearing the forests for culivation have reduced this cover.
The loss of forests is called deforestation.
India needs not only maintain its existing forest cover but also to increase it.
This can be done by planting a large number of trees. Thank you : Thank you Made by- Chetan Aggarwal