18 terms

Amazon, Case study of a tropical forest

STUDY
PLAY
Where is the Amazon
South America
What is the Amazon rainforest?
The world's largest and most diverse rainforest
How many trees
300 Billion in the Amazon
How many different types of species
15,000 in the Amazon
How many countries covered by Amazon
9- Brazil, Peru, Colombia, Venezuela, Ecuador, Bolivia, Guyana, Suriname, French Guiana
How much carbon stored
Between 80-120 billion tonnes
Increase in above ground biomass each year
0.3-0.5%
What is rising productivity of tropical rainforests due to
Sequestering of increase CO2 concentrations in the atmosphere
Capacity to absorb in 1990s
two billion tonnes
Average discharge of water into Atlantic Ocean
175,000m3/s
Rio Negro
Tributary of Amazon, 100m deep x 14km wide
Average annual rainfall across Amazon Basin
2,300mm
How much rainfall reaches the sea
30%
Rate of Deforestation per year between 2000-2007
19,368km2
Techniques for the removal of the forest
slash and burn
4 impacts of Slash and burn
1) Reduce retention of humidity in soil's top layer 2) Facilitate sudden evaporation 3) Increase albedo and temperature 4) Reduce soil porosity
Forests emit salts and organic fibres and water when they transpire which act as
Condensation nuclei- assisting in cloud and rain formation
Moisture evaporated from deforested areas form
Shallow cumulous clouds which do not usually produce rain