David Attenborough's State of the Planet DVD Notes (Ep 2)

David Attenborough's State of the Planet DVD is recommended to watch in the Edexcel book for the Biodiversity Under Threat topic. This document is notes I made on Episode 2 of the DVD named "Why is there a crisis?". 

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State of the Planet: Why is there a crisis?

Small islands suffer most of the effects of changes in the environment
Hawaii ­ most isolated group of islands on the planet
Tragically impoverished
More unique kinds of plants and animals than any other group of islands on…

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More technology allows more harvesting to occur
Cutting down trees faster than they grow ­ regeneration of trees is not fast enough
Lack of trees affect species that depend on them
Trees cut down 10 times faster than they can grow back
Overharvesting in the sea ­ 70% of…

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Edward Wilson, Biologist ­ special study of the effect of human behaviour on the rest of life says that
human action was natural in order to survive but modern industrial capacity led to us succeeding too

Plant community with higher concentration of…

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Conducted by Tom Love Joy (conservation biologist)
Set up in the rainforest in Brazil
Regrowth of rainforests that were cut down still remain isolated because it often consists of only a
few weedy species
Islands of forest change from the centre to the edge ­ the nearer the margins, the…

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Many mammals' fossils have been found proving that it used to be land ­ sea level rise
Shows that global warming can bring about changes in the distribution of animals and plants and any
future global warming is likely to do the same


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