Evergreen forest Flashcards
Where are evergreen forests found ?
In regions of high rainfall and hot temperature
Climatic requirements for tropical evergreen forest.
They require about more than 70 percentage of relative humidity the temperature ranges between 24°C to 27°C the rainfall required is of a more than 200 cm per annum
What are the characteristics features of the evergreen forest?
Evergreen forest are found in hot and wet conditions
The evergreen forest are green throughout the year because there is no fixed season for the trees shed their leaves different trees shed leaves at different times of the era allowing the vegetation to look green entire year
The trees are tall with broad leaves and hard wood.
They display layered vegetation as trees having large crowns of different heights compete for sunlight along with climbers and epiphyte
Name the layered vegetation . Why is it called so.
Evergreen forest have layered vegetation ther calls so because she’s having varying heights and large crowns compete with each other t get sunlight along with climbers and epiphytes
Name the layered vegetation . Why is it called so.
Evergreen forest have layered vegetation ther calls so because trees having varying heights and large crowns compete with each other t get sunlight along with climbers and epiphytes
The commercial exploitation of evergreen forest are not easy? Give reasons
They are characterised by dense growth . And the trees occur in mixed stands .
Lack of transportation facilities
The forest is dense and the floor is dark and wet which makes hauling of logs difficult
Tangles mass of canes ,ferns and climbers also impede transportation of log.
Why do evergreen forest have dark floor?
The evergreen forest have dark floor because their leaves are broad and thick and the thick growth does not allow sunlight to penetrate through the canopy.
Name the forest having tall trees , broad leaves and hard wood
Tropical evergreen forest
Any 5 noble trees of tropical evergreen forest
Mahogany, rosewood , gurjan , chaplas ,canes, bamboo,ironwood,rubber, shisham, toon , ebony
Uses of evergreen trees
Used in making of expensive furniture as rosewood , shisham, mahogany are durable and valuable sources of hard wood (fine grained).
Distribution of tropical evergreen forest
Andaman and nicobar islands
Western slopes of the western ghats
North eastern hill states of meghalaya, nagaland, manipur, mizoram , tripura and parts of assam valley
What are the most important forest economically and which is the main tree which is in demand. What else is it called?
So answer is the most important forest is deciduous forest timber is in demand and its name is that it is deciduous/monsoon forests
Climatic requirements of deciduous forest
Temperature ranging between 25 to 27 degrees celsius
Seasonal rainfall between 100 to 200 cm per annum
Humidity ranging between 50 to 80 percent
What happen to deciduous forest in dry season?
In dry season, deciduous forest shed their leaves for about 6 to 8 weeks when they need to conserve water
Characteristics of deciduous forest
Deciduous forest tend to shed their leaves for 6 to 8 weeks in dry seasons to conserve water
They have hard wood and broad leaves
The trees here tend to occur in pure stands which make the exploitation easy
Economically these are the most important forest .
Timber is obtained from them which is very much in demand
Name some important deciduous trees .
Mahua, myrobalan , semal ,palash,teak,sal,sandalwood, mango,neem,jamun, jackfruit,arjun
Uses of sal
Teak
Sandalwood
Semal
Myrobalan
Economic significance of deciduous forest
These are the most exploited forests . The trees occur in pure stands and have high economic valuEs
Distribution of sal, teak myrobalan semal and sandalwood ?
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Sal : central northern part and northern eastern part like bihar ,MP , Chhattisgarh, Odisha , tripura, Assam
Teak,Myrobalan and semal: in forest of Madhya pradesh , chhattisgarh , bihar, assam , tripura, tamil nadu , maharashtra.
Sandalwood : in karnataka
Most widespread forest of india
Deciduous/monsoon forest
Where are thorn forest ?
In arid and semi arid regions of Indian subcontinent where water is scarce
Climate in which thorn forest grow?
They grow in hot and dry climate with scanty rainfall
Climatic requirements of the dry forest
Temperature between 25 to 27 degrees celsius
Rainfall less than 25 cm per annum
Humidity should be less than 50 %
What ere the characteristics of xerophytic plants?
They have long roots to draw water from deep underneath
Some plants have small waxy leaves so that less water is released by transpiration
The leaves are modified into thorns and sharp spines
Plants have thick and fleshy stems to store water
Name important trees of the thorn forest
Babool , ber, neem, date palm, khair, kikar
Uses of babool
It yeilds a gum which is used for various treatments
It bark provides material fir tanning hides and skin
Uses of kikar
Kikar is used for medical purposes
Uses of ber
Its timber is tough and durable
Uses of neem
Leaves and oil :Cosmetic and medicine
Production of bio pesticides
Distribution of thorn forest
Uses of date palm
Deep forest which are impenetrable
Mangrove/tidal forrest
What are littoral Forest?
Littoral forest are wetland forest which are adapted to growing in soil which are periodically flooded in water
Name the typical feature of vegetation in tidal forest
Pneumatophores or breathing roots
How is the soil in littoral areas
Extremely clayey , marshy, devoid of oxygen,compact
Root system in mangrove forest
Tangled root system
Important trees of tidal forest
Hintal , sundari,keora,gorjan
Uses of sundari
Sundari ‘wood is hard , strong,water resistant and used in making boats
Uses of keora
Flavouring food
One of the tallest tree in mangrove
Keora
A large coniferous tree
Deodar
