Flashcards in Amazon Deck (11)
What is the annual rainfall in the amazon?
How many plant species live in the amazon?
How much of the worlds global photosynthesis occurs in the amazon?
Give facts on the carbon cycle in the amazon
Tree is 50% carbon
0.3 billion tonnes of carbon
40kg of carbon per square meter
Describe the impacts humans have had on the carbon cycle within the amazon rainforest
Deforestation leads to greater soil erosion, therefore trees are less likely to regrow
Climate change causes trees to die younger as the increased carbon dioxide concentration creates metabolic stress
What are the impacts of climate change on the carbon cycle within the amazon
Severe draughts in 2005 and 2010 leads to reduced biodiversity as heavily adapted rainforest animals cant function
Draughts cause forest fires - positive feedback
A 4% temperature increase would cause an 85% reduction in plant life
What percentage of the amazon has been lost to deforestation?
What is the biggest cause of deforestation wothin the anazon basin?
Describe the effects human activity within the amazon has had on the amazon rainforest water cycle
Reduced evapotranspiration so drier air hence less precipitation
Rainfall reaches ground quicker as less trees, (less interception)
Increased solar radiation on bare ground, lowers fertility so future sees less transpiration and more flooding.
Many studies suggest deforestation causes decreased precipitation describe an alternative view, what is the significance of this alternative view
Deforestation may increase local rainfall due to vegetation breezes
Air will warm quicker in defrosted area
Localised low pressure areas
Low pressure draws in moist air from elsewhere
This shows the repercussions are not predictable and hence are harder to prepare for