(a)Define the term “natural vegetation”(b) State three climatic factors influencing distribution of vegetation
Answer Text: i) -Natural vegetation is the plant cover that exists in an area without the interference of external modifying influence especially people and their animalsii) –Temperature- Plants in warm areas are large in number and grow faster e.g. in the tropical lands. Also there are deciduous trees which shed leaves to reduce the rate of transpiration. • In areas with low temperatures there is slow growth of plants and coniferous forests are found there.-Precipitation (rainfall) - There are a large number of plants in areas with high precipitation and these areas are dominated by forests which are broad leaved to increase the rate of transpiration. Areas with moderate rainfall are dominated by grasslands and those with little rainfall have scanty vegetation of scrub and desert types-Sunlight - There is large number of plants in areas experiencing long sunshine duration. There is little undergrowth in tropical rain forests because the canopy prevents sunlight from reaching the ground-Wind- There is heavy rainfall in areas where warm moist blow to and hence a large number of plants which may be broad leaved to increase the surface area for transpiration
Get premium membership