The Tropical Rainforest in Brazil - Impacts of Deforestation - Paper 1 Flashcards
What 2 things does deforestation mean for biodiversity?
-The biodiversity will be reduced
-Individual species will become endangered and possibly extinct.
What is the estimated number of plant, animal and insect species being lost every day due to deforestation?
137.
What are 2 global impacts of deforestation?
-Global warming
-Loss of biodiversity
What are 4 local impacts of deforestation?
-Declines of indigenous tribes
-Soil erosion
-River pollution
-Conflicts
What 2 ways does deforestation cause global warming?
-The tree canopy stops absorbing carbon dioxide in the atmosphere
-Fire is often used in clearing rainforests, which returns the carbon stored in wood back to the atmosphere.
How does deforestation cause local climate to become drier?
With the felling of trees, evapotranspiration is reduced, so is the return of moisture to the atmosphere, and the local climate becomes drier.
How does deforestation cause local climate to become warmer?
As the recycling of water is like a cooling system, when the recycling is reduced, the local climate becomes warmer.
What part of the soil is quickly removed by heavy rainfall after clearing?
The thin topsoil.
How does gold mining cause river pollution?
The mercury used to separate the gold from the ground is allowed to enter the river.
What are the effects of gold mining causing river pollution?
Fish are poisoned, as well as people in nearby towns .
What else is polluting rivers other than gold mining?
Soil erosion.
How many indigenous tribes were there in 1900?
330.
How many indigenous tribes are there now?
240.
Give 4 reasons why indigenous people have been forced out of the rainforest:
-The construction of roads
-Logging
-The creation of ranches, plantations and reservoirs
-The opening of mines
What has happened to most of the displaced people of indigenous tribes?
They have ended up in towns and cities, where few have adjusted to this very different environment. Addiction to drugs and alcohol has been common, and sadly many have died young.
