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Ecological importance of Tropical Rainforests (Gp4) (Water cycle (trees…
Ecological importance of Tropical Rainforests (Gp4)
Carbon sink
a total of 76 billion tonnes of carbon is stored in the Amazon rainforest
carbon sink by absorbing around
600 million tonnes
per year
reduces amount of CO2 in the atmosphere
control climate change
Habitat
area: <2% of the Earth's surface
hot and wet climate all year round (stable environment)
home to
50%
of the Earth's species
~3-50 million species
28,000+ epiphyte species catalogued.
many species evolve to adapt to TRF e.g.
a more complicated food web controls the population of each species
ensure no species will dominate the habitat leading to extinction of other species
maintain biodiversity in an ecosystem
ensure sustainable ecosystem
Many of the ground-dwelling animals of the temperate zone, like porcupines, kangaroos, anteaters, earthworms, and crabs, have moved up into the canopy in tropical regions.
Oxygen supply
provides
20%
of the Earth's oxygen
regulate composition of the atmosphere,
makes the Earth habitable
Water cycle
trees release water to atmosphere by transpiration
trees intercept the rain
tree roots increasing infiltration of rain into soil
rainforests provides water/ is important in water cycle