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Ascension island
- 1. CLOUD FOREST ON ASCENSION ISLAND How can the man transform his environment ?
- 3. DISCOVERY 1501 : Joao Da Nova Ilha de Nossa Senora de Conceiçao 1503 : Afonso de Albuquerque Ascension Island
- 4. THE BEGINNING OF THE TRANSFORMATION The idea : Sir Joseph Dalton Hooker botanist Supported by : Charles Darwin
- 5. PROPOSITIONS Planting trees on the mountain : most important Developing the formation of deeper soils Planting the more promising areas in the lower valleys with drought adapted trees Introducing suitable crops into garden on Green Moutain
- 6. THE IDEA Place with no water Trees : need of water Place with water !
- 7. LET’S DO IT ! Kew Garden Click on the picture to go to Kew’s website
- 8. AND NOW ? 0 10 20 30 40 50 60 70 80 Jan Feb Mar Apr May Jun Jul Aug Sept Oct Nov Dec Average high °C Average low °C Rainfall mm (inches) Avg. rainy days % humidity
- 9. AND NOW ? Green Mountain
- 10. CONCLUSION It is possible ! Barren island became a tropical forest Thiphaine MEDARD Thiphaine.medard(at)etu.emse.fr
- 11. SOME USEFULL WEBSITES http://www.globalwhisperer.com/2010/09/ascension -island-darwins-best-kept-secret/ http://www.bbc.co.uk/news/science-environment- 11137903 http://www.ljmu.ac.uk/BIE/greenmt.pdf Ascension island website
Editor's Notes
- Young island : 1 million year old
- But very dry and barren : remained inhabited
- Began to be used by the British after prisonning Napeleon I in Saint-Helena. But still dry, and problem of water supply
- 2 : by encouranging more vegetation to grow on the steeper slopes
- Happened to have a connection at kew garden in Britain. Brought trees from all around the world at each trip of the Royal Navy to the Island. Pines, eucalyptus, Bamboo,…
- Nickname : Green mountain
- Only 100 years, not thousands of years -> can have many application : can reverse the changes, or maybe apply it on Mars !