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5.4 forests and deforestation (Habitat Fragmentation (edge effect,…
5.4 forests and deforestation
forest destruction
forest fires
surface fires
burns small shrubs and plants on the ground, bigger trees survive
smaller breed of fires
essential for the maintenance of certain biomes
crown fires
the larger breed of fires that burns everything down
Australia
deforestation
increases in floods and water pollution
generates habitat and species loss
rises CO2 levels
loggin
clear cutting
creates soil erotion
creates a change in biome
might prevent regeneration of forests
the amazon rainforest
Habitat Fragmentation
edge effect
generates the arrival of invasive species
creates isolation in populations
stops migration
Forests
high biodiversity
tropical forests
they contain 50% of world known species
the absorb 1/3 of all CO2 emissions
secondary growth forests
tends to be tree plantation
comes from ecological succesion
old/primary Forests
they are untouched by people
the biggest can be found in Russia and in Brasil
all forest contain biofuels, plants and substances used for medicine and resources for the industry