SST Project


TROPICAL THORN FOREST    



                             
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VEGETATION AND WILDLIFE
A thorn forest is a dense scrub like vegetation characteristic of dry subtropical and warm temperate areas with a seasonal rainfall averaging 250 to 500 mm (9.8 to 19.7 in). 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, and consists primarily of small, thorny trees that shed their leaves seasonally. Trees typically do not exceed 10 metres (33 ft) in height, usually averaging between 7 and 8 metres (23 and 26 ft) tall. Thorn forest grades into savanna woodland as the rainfall increases and into desert as the climate becomes drier.





CLIMATE

Thorn forest consists of dense, scrub like vegetation characteristic of dry subtropical and warm temperate areas with a seasonal rainfall averaging 250 to 500 millimeters (about 10 to 20 inches). ... A thorn forest consists primarily of small, thorny trees that shed their leaves seasonally




       


These forests are found in the areas of high temperature of 27-30oC and very low annual rainfall of 20-60 cm with long periods of dryness. These forests are distributed in western Rajasthan, parts of Maharashtra, Madhya Pradesh and Tamilnadu.







AREA





SPECIAL FEATURES

Chief charateristic of such forests is sparse distribution of small (8-10 m high) mostly thorny trees with shrubs being more common than trees. The plants in these forests remain leafless for most of the year. They develop leaves only during the brief rainy season when grasses and herbs also become abundant.
Dominant plants in these forests are Acacia nilotica, A. leucophloea, A. Senegal, Prosopis spicigera, P. juliflora, Albizzia and Capparis.
Common subdominant plants are Zyzyphus, Anogeissus, Erythroxylon, Euphorbia, Cordia, Randia, Balanites, Salvadora, Gymnosporis, Leptadenia, Suaeda, Grewia, Gymnoma, Asparagus, Butea, Calotropis, Adathoda, Madhuca, Salmelia, Crotolaria, Tephrosia and Indigophera. 



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TROPICAL THORN FOREST A Thorn Forest is a dense, scrub like vegetation characteristic of dry subtropical and warm temperate areas with a seasonal rainfall less 70 cm. This type of vegetation covers a large part of north-west in India including semi-arid areas of Gujarat, Rajasthan, Madhya Pradesh, Chhattisgarh, Uttar Pradesh and Haryana. In South America, Thorn Forest is sometimes called Caatinga, and consists primarily of small, thorny trees that shed their leaves seasonally. Trees typically do not exceed 10 meters(33 ft.) in height, usually averaging between 7 and 8 meters (23 and 26 ft.) tall. CLIMATIC CONDITIONS The climatic condition found is a dense,scrub like vegetation characteristic of dry subtropical and warm temperate areas with a seasonal rainfall averaging 250 to 500 mm (9.8 to 19.7 in.). Thorn forest grades into savanna woodland as the rainfall increases and into desert as the climate becomes drier. VEGETATION
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TROPICAL THORN FOREST CONTENTS: 1.        TROPICAL THORN FOREST 2.      AREA 3.      CLIMATIC CONDITION 4.      SPECIAL FEATURES TROPICAL THORN FOREST Thorn forest is a tropical vegetation formed with thorny shrubs and bushy trees, perhaps with a few taller trees, set in a sparse ground flora in which grasses are often lacking. AREA This vegetation covers a large part of southwestern North America and southwestern Africa and smaller areas in Africa, South America, and Australia . In India, they are found in north western parts, semi- arid areas of Gujarat, Uttar Pradesh, Madhya Pradesh and Haryana. CLIMATIC CONDITIONS These forests are found in dry subtropical  and warm temperate  areas with a seasonal rainfall averaging 250 to 500 mm. VEGETATION The trees found here include Acacias, Palms Euphorbias and Cacti.
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