rainforests are the most diverse biomes in the world. is preserving this biodiversity important? ...
TRANSCRIPT
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Rainforests are the most diverse biomes in the world.
Is preserving this biodiversity important? Why or why not?
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Assessment Statements 4.2.2 – Discuss the perceived
vulnerability of tropical rainforests and their relative value in contributing to global biodiversity
4.2.3 – Discuss current estimates of numbers of species and past and present rates of species extinction
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Rainforests
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Rainforest 28% of world’s oxygen turnover (CO2 →O2) Huge amount of biodiversity
40-75% of all species Large numbers of species endemic to area
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Tropical Rainforests Video 1 Video 2 Video 3 Video 4
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Temperate Rainforests Video
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Rainforests
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Rainforests Most species have evolved to inhabit very specialized
niches in their environment When humans disrupt that environment, many species
cannot survive Humans have destroyed/disturbed about half of these
forests Because species depend on each other in a complicated
web of relationships, changing just one part of the web harms the entire ecosystem
This breakdown of rainforest ecosystems will likely lead to the disappearance of up to 10% of the world’s species within the next 25 years
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Rainforests Humans depend on the rainforest’s
millions of life forms for its own existence The genetic diversity provides invaluable
additions to the gene pool which help maintain and improve domestic crops
Without a diversity of strains, crops become overly homogenous and vulnerable
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Rainforest Disruption The projected major harmful effects:
Reduce Earth’s vital biodiversity▪ Destroying/degrading the habitats of unique
organisms
Accelerate climate change due to global warming▪ Reduction of CO2 consumption
Alter regional climate patterns to prevent return of diverse forests in cleared lands
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Topic 4 Internal Assessment Design an experiment where you
investigate the effects of some factor on the biodiversity at a site of your choosing
You will be assessed on all 3 aspects of the Planning rubric