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Paper Topic:

‘With the aid of a detailed case study assess the impact of human activities on a grassland biome.’


The need and importance of grasslands , particularly the Pampas

A brief study on the state of ecosystem in Pampas

Grasslands biomes , seen around the world are large areas occupied by grasses , flowers and herbs . These areas are more dominated by grass than by shrubs and trees , inhabited predominantly by grazing mammals and ground-nesting birds . Grasslands are semi-arid areas , which receive about 10 to 30 inches of rain each year . They are characterized predominantly by the rainfall , which prevent the areas from becoming a forest due to heavy rains

or a desert due to lesser rains . Grasslands are called as plains or prairies in North America which are mostly humid and thickly covered by tall grass . They are referred to as steppes in Eurasia , which have grass of shorter length than that in prairies . Steppe grassland has lesser moisture and compatible vegetation . In Africa these are savannas identified by warm dry climate and droughts , with plant life well adapted to this hot , dry conditions . Tropical savanna , which is a form of savanna , is ecologically diverse supporting many species of flora and fauna . The grasslands of South America are called as pampas , which have temperate climate and a fertile soil . Grasslands provide us with invaluable environmental services . Grasslands were studied to absorb about 60 kgs of carbon annually per hectare and thereby reduce global warming by reducing accumulation of greenhouse gasses (1997 Report . Today only 0 .7 of the world 's grasslands and about 0 .3 of the South American grasslands are protected . Mankind 's two most important activities namely agriculture and forest industry depend historically on grasslands , from which a large number of products are directly or indirectly generated

The flat , fertile plains of the Pampas stretch from the Atlantic Ocean to the Andes Mountains , occupying an area of about 777 thousand kilometers . The Pampas are mainly in central Argentina , gradually extending into Uruguay and the southern Brazilian state of Rio Grande do Sul , located between 34 ? and 30 ? south latitude and between 57 ? and 63 ? west latitude . It should be noted here that the Argentinean Pampas are the original home to the South American cowboy `Gaucho . Pampas are recognized as one of the most endangered habitats on the face of the earth

According to Annbal Parera , coordinator of an alliance for the conservation of the grasslands and pampas , society view grasslands as the place were grains and meat is aplenty . These are therefore more prone to being transformed into pastures or farmlands than wetlands or forests . It has been estimated that atleast 1 .3 million ha lose about 20 tons per ha of soil every year in the Pampas . Apart from the loss of nutrients , the use of agrochemicals and fertilizers have many negative impacts on the biodiversity in the longer run (Parks . It has also been learnt that in the last few decades , grassland areas of pampas have been reducing at the rate of about one to ten percent a year . Almost of the original grasslands exist...

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