Page 124 - SST Class 08
P. 124

mainly used in ship-building and houses. These          Tropical Deciduous Forests
            forests have suffered severe destruction at the         These forests are found in the regions having
            hands of man. They have been largely cleared to         below 200 cm of rainfall, but above 75 cm, such
            make way for agriculture and industry, as they
                                                                    as the Deccan Plateau and Northern Plains. The
            grow in favourable temperate climate and there is       important trees are teak, sal, shisham, neem and
            rapid expansion of population in these regions.
                                                                    mango.
            Tropical Deciduous Forests
                                                                    Thorn and Scrub Forests
            Also called tropical monsoon forests, they are          These forests are found in rain-starved regions,
            found in subtropical areas with a distinct dry          such as in north-western desert. The common
            season—southern Asia, parts of Central America,
                                                                    shrubs found in these forests include scrub,
            Brazil and northern Australia, New Zealand,             bushes, cactus, thorny grasses, date palm, babool
            southern China, Bangladesh, Myanmar, Vietnam,           etc.
            the Philippines, Thailand etc. They are less dense
            than tropical evergreen forests, and have less          Tidal Forests
            variety. The valuable trees of these forests are        These are evergreen forests and are found in river
            teak, sal, sandalwood, acacia, eucalyptus and           deltas, such as in Sundarbans. Other deltas are
            shisham. The mangrove trees are found in swamps         formed by the Mahanadi, Godavari, Krishna and
            and delta regions.                                      Kaveri rivers. Sundri tree is the main tree found in

            Temperate Deciduous Forests                             these areas.
            These forests are found in temperate coastal            Mountain Vegetation
            regions with cool climate and moderate rainfall.        The Himalayas have different types of vegetation
            These trees shed their leaves in winter to protect      depending    upon    the   altitude.  The   tropical
            themselves from cold. They are widely found in          deciduous    forests  are  found    in  the   lower
            New Zealand and southern Chile, western Europe,         mountains up to an altitude of 1800 metres,
            north-eastern China, Japan and north-eastern US.
                                                                      A F G H A N I S T A N
            The principal species of trees are redwood,
            poplar, ash, beech, cedar, birch, elm, maple, fir
            etc. These forests are exploited for industrial,
            domestic and settlement purposes.

                                                                      P A K I S T A N
                    Just Think!                                                                 N E
                                                                                                          BHUTAN
                                                                                                  P A L
            Why different types of forests are found at
            different places?


                      NATURAL VEGETATION IN INDIA

            India is blessed with a wide variety of plant life.
                                                                      A R A B I A N  S E A           B AY  O F  B E N G A L
            We can divide the natural vegetation in India
            under the following types :

            Tropical Evergreen Forests                                                              Tropical rainforests
                                                                                                    Tropical deciduous forests
                                                                                                    Thorn forests
            These forests are found in the regions having                                           Mangrove forests
                                                                                                    Mountain forests
            above 200 cm rainfall, such as the Western Ghats
            and north-eastern states. These forests have thick
                                                                                          S R I
            and tall trees, such as rosewood, bamboo, ebony,                       I N D I A N  L A N K A  O C E A N
            teak, sandalwood, rubber tree etc.                                      India : Natural vegetation
                     Contemporary Social Science-8
              124
   119   120   121   122   123   124   125   126   127   128   129