vegetation Flashcards
(26 cards)
Define natural vegetation.
All plant grows which depends upon natural environment as temperature
rainfall
sunlight and water in association with physical factors is called as natural vegetation.
How much area of the world is covered by forests? How much area of Pakistan is covered with forests?
About 25-30% area of the earth surface is covered by forests today. Before the start of agriculture
it was 45% of the total area. Only 4.8 % area of Pakistan is covered with forests.
Describe the types of natural vegetation of the world.
Natural vegetation can be divided into three types. 1 Forests 2 Desert vegetation 3 Grasslands
What are the three types of evergreen forests? (LHR 2013-1/21) (RWP-19)
(i)Equatorial evergreen forests (ii) Coniferous evergreen forest. (iii)Mediterranean evergreen forests
World’s largest equatorial natural forests (rain fed) lies in which country and continent?
World’s largest rain fed equatorial natural forests lies in Brazil in the continent of South America.
Which continent of the world is without natural vegetation and why?
Continent of Antarctica is absolutely empty from natural vegetation because it is hundred percent covered by snow.
Write down factors responsible for the development of natural vegetation?
Distribution and vegetative growth of natural vegetation depends upon: 1 Temperature 2 Altitude (height) 3 Annual average rainfall 4 soil 5 sunlight etc.
Define evergreen forests.
All those types of forests which never shed (lose) their leaves and remain green throughout the year are called evergreen forests.
Describe economic importance or advantages of natural vegetation or forests. State importance of forests in Pakistan.
(i) Source of timber (ii) Source of oxygen 3 Source of food 4 Source of rainfall 5 prevention from floods
Write down important plants found in the equatorial rain fed region
Tea 1 Cinchona 2 Rubber 3 Bamboo 4 Coffee 5 Cane etc. 6 coca 7
Write down two important characteristics of mulberry tree?
(i)Mulberry is an important tree of the Mediterranean region. (ii)Its wood is used in sports goods manufacturing. (iii)Its leaves are food for silkworms which produce natural silk.
Define grasslands.
In the areas of the world where rainfall is low and temperature is high different types of grasses developed as growth of forests in not possible are called grasslands.
Define deciduous forests.
Those forests which shed (lose) their leaves in any part of the year are called as Deciduous forests. These forests do not remain green throughout the year.
Define forests. What is meant by forests in technical terms.
Forests are the plants, mostly of trees or woody vegetation present on an area of land. Allen and Sharp has defined forests in his book “An introduction to American forestry as: “A community of trees and associated organisms covering a considerable area by utilizing air, water and minerals to attain maturity and to reproduce itself and capable of furnishing mankind with indispensable products and services are called forests
Write down different types of deciduous forests
(i).Monsoon deciduous forests (ii) Temperate deciduous forests
What do you know about steppe grasslands? What are biggest grass lands of the world?
Steppe’s grasslands are biggest grasslands of the world. These are located in continent of Asia and Europe. These grasslands
are located from china (Asia) to Hungary (in Europe). Mostly nomadic people are involved in animal herding. Very cool winter prevailed in this area.
What do you know about pampas’s grasslands?
The grasslands are located in the continent of South America. These are located in Argentina
Paraguay and Uruguay is called papas grasslands. Herding and cultivation both are in practice here. These grasslands are very fertile.
In which areas equatorial OR tropical evergreen forests are found?
These forests are located in equatorial region from 0 to 5° north and south latitude parallel to the equator. important zones are. (i)Congo basin in Africa (ii)Malaysia (iii)Brazil (iv)Amazon basin in South America (v)Singapore (vi)Indonesia (vii)Mozambique (viii)Madagascar Etc.
In which areas Mediterranean evergreen forests are found?
Mediterranean evergreen forests are located from 30° to 45° latitude north and south of equator. These are located along the Mediterranean Sea from Portugal to Palestine. These are Australia
New Zeland
Chili
Brazil
Argentina
USA
South Africa etc. Types of trees: Olive
oak
cork
mulberry
maple
citrus
orange
lemon
apricot and grapes.
Eucalyptus plant is found in which country and continent first?
Eucalyptus plant is found in Continent of Australia. 400 types of this plant were found here.
Write down factors responsible for growth of natural and artificial and natural forests.
Natural and artificial forest vegetative growth depends on 1 Climate (temperature & rainfall) 2 Physical features 3 latitude 4 Type of Soil 5 Altitudes 6 Distance from the sea also
Write names of four important trees of Monsoon deciduous forests In which countries Monsoon deciduous forests are found?
These forests are located from 5° to 30° North and South latitude. These forests are found in: Pakistan
Bangladesh
India
Sri Lanka
Myanmar
Cambodia
Vietnam
China
Australia
Mexico
USA and Thailand etc. Types of trees: Bamboo
Rubber
Shesham
Jarul
Mango
Guva and sandalwood.
What is the important profession of people in the grasslands of Australia?
Southern and Northern dawn grasslands are located in Australia. The important profession of people in this part of world are: (i) Commercial Herding (ii).Commercial agriculture
What is meant by lumbering?
Cutting of woods and collection of food from forests to fulfill the needs for commercial purposes is called lumbering.
