Natural Vegetation - Connect Civils

Natural Vegetation is an important topic in world geography, referring to plant life that grows naturally without human intervention in a particular region. It reflects the interaction of climate, soil, and relief, and helps in understanding the ecological and environmental conditions of different parts of the Earth.

Types and Distribution of Natural Vegetation

Natural vegetation refers to plant communities that grow naturally without human interference, mainly determined by climate (temperature and rainfall), soil, relief (altitude and slope), and latitude.
The world’s vegetation communities can be broadly grouped into forests and grasslands, with additional forms adapted to extreme or specialized environments.
On this basis of climate (temperature and rainfall), soil, relief (altitude and slope), and latitude, vegetation is arranged into distinct vegetation zones across the globe.

Major vegetation zones include:

Tropical vegetation
- Tropical Forests
  - Equatorial Forests
  - Tropical Monsoon Forests
  - Mountain Tropical Forests
- Tropical Grassland
  - Savanna Humid Grassland
  - Steppe/Savanna Dry Grassland
Temperate vegetation
- Temperate Forest
  - Mediterranean Forests
  - Coniferous Forests (Taiga/Boreal Forests)
  - Deciduous Forests
- Temperate Grassland

Tundra vegetation
Desert vegetation
- Hot Desert Vegetation
- Cold Desert Vegetation
Mountain (Alpine) vegetation
- Tropical Mountain Vegetation
- Temperate Mountain Vegetation
Mangrove, Marsh and Swamp vegetation

Equatorial Forests (Tropical Vegetation)

Equatorial Forests (Tropical Vegetation)	Details
Location	Between 10° North and 10° South of the equator Occupy about 6% of the Earth’s surface
Global Distribution	Amazon Basin (South & Central America) Congo Basin (Central Africa) West African Coastal Belt (Nigeria, Ghana, Ivory Coast, Liberia, Central African Republic) South East Asia-Malaysia, Burma
Geographical conditions	Annual Rainfall: Heavy and well-distributed rainfall throughout the year, around 2000 mm annually Temperature: Uniform high temperature ranging between 23°C–24°C Sunshine Requirement: Require abundant sunshine for dense and continuous growth Soil Type: Fertile and well-drained soils Nature of Vegetation: Evergreen forests due to absence of distinct seasons Vegetation in four layers – Emergent Layer, Canopy Layer, Understory Layer, and the Forest Floor. Trees are very tall, generally 35–40 meters Broad-leaved evergreen trees Presence of buttress roots to support large trees Dense and thick canopy that blocks most sunlight Only about 2% of sunlight reaches the forest floor Dominant Tree Species: Mahogany, Ebony, Greenheart, Redwood

Tropical Monsoon Forests (Tropical Vegetation)

Tropical Monsoon Forests (Tropical Vegetation)	Details
Location	Found beyond the equatorial region, between 10° and 25° North and South of the Equator
Global Distribution	Amazon Basin Central America Congo Basin West African Coast Madagascar Southeast Asia Parts of India and Sri Lanka Northern Australia
Geographical conditions	Type of Climate: Monsoon climate with distinct wet and dry seasons Annual Rainfall: Heavy rainfall of about 2000 mm per year, received mainly during summer Seasonal Rainfall Pattern: Very little rainfall during winter due to the influence of offshore trade winds Temperature: Moderate temperature around 27°C, suitable for plant growth Nature of Vegetation: Deciduous forests, as trees shed leaves during the dry season Tree Height: Trees grow up to about 30 metres Trees possess thick trunks to store water for dry seasons Presence of long tap roots that penetrate deep to access groundwater Trees shed leaves in dry season to minimize water loss Broad leaves, supported by sufficient rainfall during wet season Dominant Tree Species: Valuable hardwoods such as Teak and Sandalwood

Mountain Tropical Forests (Tropical Vegetation)

Mountain Tropical Forests (Tropical Vegetation)	Details
Location	Found at high altitudes in tropical mountain regions
Global Distribution	Himalayan mountain slopes East African highlands – Rwenzori Mountains, Mt. Kenya, Cameroon Mountains, Ethiopian Highlands Western margins of South America
Geographical conditions	Altitudinal Range: Trees grow abundantly between 1,500 and 3,500 metres Rainfall: Require heavy and reliable rainfall Temperature: Cool to moderate temperatures, generally ranging between 10°C and 20°C, which vary with altitude and slope. Soil: Deep and fertile soils essential for forest development Nature of Vegetation: Mainly evergreen forests Predominantly broad-leaved vegetation Very dense natural vegetation due to favorable climatic conditions Giant evergreen trees mainly grow on windward slopes Dominant Tree Species: Teak, Bamboo, Pine, Fir, Oak, Maple, Deodar, Laurel, Spruce, Cedar, Podocarpus, Camphor

Mediterranean Forests (Temperate Vegetation)

Mediterranean Forests (Temperate Vegetation)	Details
Location	Found mostly between 30° and 40° North and South latitudes
Global Distribution	Found mainly in South-West America Spain, Italy, France Australia Algeria, Morocco, Tunisia Southern tip of South Africa near Cape Town Central Chile
Geographical conditions	Type of Vegetation: Evergreen shrubs, bushes, and short trees adapted to dry summers. Dense foliage of evergreen shrubs, bushes, and small trees, usually below 2.5 metres Leaves are thick, rough and small, waxy, reducing water loss adapted to summer drought. Plants possess long taproots to access underground water Vegetation includes “Xerophytic Plants” adapted to dry summers Vegetation adapted to dry summers and mild, wet winters Dominated by broad-leaved trees such as oak and mixed sclerophyll forests

Coniferous Forests (Taiga/Boreal) (Temperate Vegetation)

Coniferous Forests (Taiga/Boreal) (Temperate Vegetation)	Details
Location	Found between 50° and 60° North latitudes
Global Distribution	Principally it spans eight major countries in the Northern Hemisphere (Canada, China, Finland, Japan, Norway, Russia, Sweden, and the US). World’s largest land biome, covering 30% of global forest area and 10% of Earth’s land surface
Geographical conditions	Vegetation strongly influenced by cold climate and long winters Grow under inadequate supply of sunlight, especially during winter Soil: Medium fertile soils with availability of moisture Temperature: Very cold winters with average temperature below 43°F (about 6°C) Nature of Vegetation: Dominated by evergreen softwood forests Trees are tall, straight, softwood evergreen species Trees often grow over 30 metres (100 feet) tall Conical-shaped trees, adapted to shed snow easily Small, narrow, needle-like leaves that reduce transpiration Grow shallow roots used to absorb water and nutrients from the topsoil Vegetation highly adapted to harsh winter conditionsMajor Tree Species: Pine, Fir, Cedar

Deciduous Forests

Deciduous Forests	Detail
Location	Found mainly between 40° N to 60° N and 30° S to 50° S latitudes.
Global Distribution	Eastern half of North America, especially in the United States and southern Canada Central and western Europe South-west Russia Eastern China, and Japan In the Southern Hemisphere, southern Chile and along the middle eastern coast of Paraguay in South America. New Zealand and south-eastern Australia
Geographical conditions	Deciduous forests require moderately distributed rainfall. Need low sunshine supply. Trees shed their leaves in the dry season to conserve water. Deciduous forests are characterized by the existence of epiphytes which include mosses. Trees like sandalwood, teak, ebony, bamboo, etc. are the common trees found here. They also contain hard wood tree species such as maple, oak, beech and hazel.

Tropical Grasslands/Savanna Humid Grassland

Savanna Humid Grassland	Details
Location	Extends approximately between 5° and 20° North and South of the Equator
Global Distribution	Madagascar, Nigeria, Ghana, Uganda, and Tanzania, Zambia, Zimbabwe, and Mozambique Indian subcontinent South East Asia New Guinea Northern & Eastern Australia Brazil, Venezuela, Colombia
Geographical conditions	Temperature: Temperatures ranging between 25°C to 32°C Rainfall – approximately 750 to 1000 millimeters per year. Major Example: Miombo (Mambo) woodlands of Central Tanzania, East Africa Type of Vegetation: Mainly deciduous trees, shrubs, and grasses Tree species are deciduous and shed leaves during dry periods/dry season Dominant Tree Species: Tree species such as Baobab and Acacia are common Grasses can grow very tall, about 3 to 4 metres high Common Grass Type: Elephant grass

Steppe (Temperate Dry)/Savannah (Tropical Dry) Grassland

Savannah (Tropical Dry) Grassland	Details
Location	Steppe (Temperate Dry Grassland): Between 25° and 55° North and South Savanna (Tropical Dry) Grassland: Between 5° and 25° North and South
Global Distribution	In North America – Great Plains region. In South America – Llanos of Venezuela and Colombia and the Pampas of Argentina. In Africa – Sudan–Sahel belt, East Africa, and large parts of Southern Africa. In Europe and Asia – Ukraine, southern Russia, Kazakhstan, and into Central Asia and Mongolia. In South Asia – Indian subcontinent. Australia – Northern and interior parts
Geographical conditions	Temperature: Found in warm or hot climates Annual Rainfall: About 508 mm to 1270 mm per year Rainfall occurs for about 6 to 8 months Soil: Dry and porous soil with rapid infiltration of water Vegetation: Tall grasses and scattered trees Open canopy allowing sufficient light to reach the ground Grasses usually grow two metres high or more Dominant Tree Species: Acacia Some trees lose their leaves during the dry season Some plants have thick bark and thorny leaves to reduce water loss Annual herbaceous plants die after flowering and fruiting and regrow from seeds with the onset of the wet season

Temperate Grassland

Temperate Grassland	Details
Location	Found in the mid-latitudinal zones Prairies (North America), Pampas (South America – Argentina), Downs (Australia), Velds (South Africa), Steppes (Europe)
Global Distribution	Located mainly in the interior parts of continents Central Asia (from Black Sea to Central Russia) North Central USA and Southern Canada South-East Australia Southern Africa Argentina
Geographical conditions	Moderate rainfall of about 500 mm – 750 mm Moderately fertile, well-drained and humid soil Average sunshine with dry and cool winters Grasses are short and juicy, suitable for cattle feed Region known for large-scale production of maize and wheat Known as the “Bread Basket of the World” Perennial temperate grasses mostly belong to the Gramineae family Steppes form the largest segment of temperate grasslands Types of Steppes: Forest steppes, Meadow steppes, Grass steppes Prairie Sub-divisions: Tall grass prairie, Mixed grass prairie, Short grass prairie Pampas Classification: Divided into Humid Pampas (Eastern Argentina) and Sub-humid Pampas (Western Argentina) Velds Classification: Themed veld (Altitude: 1500–2000 m), Sour veld, and Alpine veld (Altitude: 2000–2500 m) of the Drakensberg Mountains Downs Classification (Australia): Temperate tall grasslands (Eastern coast of New South Wales to Victoria and Tasmania); Temperate short grasslands (North of Temperate tall grasslands); Xerophytic grasslands (interior of New South Wales and Queensland under semi-arid climate) Canterbury Grasslands: Extended over the Eastern and Central parts of New Zealand

Tundra vegetation

Tundra vegetation	Details
Location	Arctic regions and high mountain tops
Global Distribution	Alaska Parts of Russia Northern Scandinavian countries Some parts of Canada
Geographical conditions	Derived from the Finnish word “tunturi”, meaning “treeless plain” Found in the coldest regions of the world and survives under harsh environmental conditions Cold, windy climate with limited rainfall Winters are cold, long, and dark Temperatures usually range between -40°C and 12°C A layer of permanently frozen soil lies beneath the surface Snowfall supports survival of plants and animals and acts as a protective layer on the ground surface Summer growing season is just 50 to 60 days, when the sun shines up to 24 hours a day Flora: Mosses, lichens, sedges, birches

Hot Desert Vegetation

Hot Desert Vegetation	Details
Location	Located between 15° – 30° North and South of the equator
Global Distribution	Found in North America South and Central America South Asia Africa Australia
Geographical Conditions	Experiences hot climatic conditions throughout the year Rainfall is unreliable and generally 250 mm or less per year Dominated by dry winds, leading to arid conditions Presence of poor quality and infertile soils High temperatures ranging between 29°C to 31°C Conditions result in very poor and sparse vegetation Plants have small leaves, sunken or restricted stomatal openings, and pale, reflective leaves Some plants have succulent stems, long roots, and modified leaves Desert trees shed leaves occasionally to reduce water loss Trees grow long taproots to access deep underground water Some desert plants grow no leaves at all to avoid water loss through transpiration Flora: Thorny Acacia, bushes, Euphorbia, and turfed coarse grasses

Cold Desert Vegetation

Cold Desert Vegetation	Details
Location	Located mainly in high flat plateau areas and mountainous regions of the temperate zones (between the Polar Regions and the Tropics)
Global Distribution	Found in the Northern part of Canada Northern Russia Northern Sweden, and Finland islands in the Arctic Ocean
Geographical Conditions	Requires low sunshine for successful growth Freezing temperatures, average winter temperature ranges between –2°C to 4°C Lack of moisture Very little rainfall (about 250 mm in summer) and snowfall during winter Poor quality soils with relatively high soil salinityAreas characterized by frost conditionsGood drainage facilitating leaching of most saltsPlants are widely scatteredMain plants are deciduous, mostly with spiny leavesExperiences short, wet, moderately warm summersLarge amount of snowfall in winter (and sometimes in summer)

Tropical Mountain Vegetation

Tropical Mountain Vegetation	Details
Location	On the slopes of Tropical Mountains worldwide
Global Distribution	Most extensively in South America(Andes) and Southeast Asia, also occurring in Central/East Africa, Central America, the Caribbean, India, and New Guinea
Geographical Conditions	Requires steep gradients Well-distributed rainfall with humid conditions Strong seasonal differences Temperature decreases with altitude (about 20°C at 900 m and 4°C at summit regions) Annual precipitation varies with altitude (~900 mm at foothills, ~2000 mm at 1500 m, and above 3000 mm between 2000–2300 m on windward slopes) Fertile, well-developed, moderately acidic soils such as Andosols Temperature decrease with altitude causes distinct vegetation zones Wet temperate forests suitable between 1000–2000 mm rainfall Temperate coniferous forests (pine, deodar, silver fir, spruce, cedar) found in higher rainfall zones (1500–3000 mm) Above the snow-line, vegetation is absent due to low temperatures and eroded bare rocks.

Temperate Mountain Vegetation

Temperate Mountain Vegetation	Details
Location	Found in high mountains of temperate regions, growing best between 35°N and 60°N latitudes
Global Distribution	Alps (Western Europe)Norway, Sweden, Finland Rocky Mountain slopes in California, British Columbia Andes Mountains in South America
Geographical Conditions	Contains both deciduous and coniferous trees such as poplar, birch, oak, and elm Vegetation is arranged in clearly demarcated zones along mountain slopes Thick bark to store water for winter use Deciduous trees shed leaves in winter when temperature falls below 6°C Coniferous trees adapt by having tiny needle-like leave Tree species become shorter and more scattered towards higher zones containing meadows

Mangrove vegetation

Mangrove vegetation	Details
Location	Found in marshy and swampy coastal areas, growing along coastal margins between 5° N and 5° S of the equator
Global Distribution	Along tropical and sub-tropical coastlines especially in South and South-East Asia, Africa, Australia, and the Americas, mainly near deltas and estuaries. Largest Mangrove Forest: Sundarbans in West Bengal are the largest mangrove forest regions in the world. It is listed as a UNESCO World Heritage Site.
Geographical Conditions	They can survive under extreme hostile environments such as high salt and low oxygen conditions. Underground tissue of any plant needs oxygen for respiration. But in a mangrove environment, the oxygen in soil is limited or nil. The mangrove root system absorbs oxygen from the atmosphere. Mangroves have special roots for this purpose called breathing roots or pneumatophores. These roots have numerous pores through which oxygen enters the underground tissues. Mangroves, like desert plants, store fresh water in thick succulent leaves. A waxy coating on the leaves seals in water and minimises transpiration. Viviparous: Their seeds germinate while still attached to the parent tree. Once germinated, the seedling grows into a propagule. The mature propagule then drops into the water and gets transported to a different spot, eventually taking root in a solid ground.

M	T	W	T	F	S	S
		1	2	3	4	5
6	7	8	9	10	11	12
13	14	15	16	17	18	19
20	21	22	23	24	25	26
27	28	29	30