Can they hold more in the future raw materials

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Unformatted text preview: Grosso, Brazil June 28, 2006 Amazon DeforestaCon, Mato Grosso, Brazil Difference Forest assessment is difficult, even with satellite imagery: • Vast surface areas of Earth: even with automaCc algorithms, much human input is required • Need for ‘ground truthing’: must visit representaCve selecCon of areas to gauge how actual biomass compares with satellite image • PoliCcal: There must be poliCcal will and longevity to fund and maintain forest inventory programs Rainforests and Biodiversity • 20 – 80 species of trees per acre (temperate forests: typically <5 per acre) Madagascar rain forest: ~2000 tree species (N. America: 400 species) Typical 4- square- mile area of rainforest: 750 species of trees 120 species of mammals 400 species of birds 100 species of repCles 60 species of amphibians 1500 species of flowering plants ‘innumerable’ insects What gives rise to such biodiversity? # species # species # species Trends in Biodiversity tropics LaCtude poles “LaCtude / Temperature Effect” small island large conCnent young old Area Age “Area Effect” “Ecosystem Age Effect” What gives rise to such biodiversity? ? low Stability high “Ecosystem / Climate Stability Effect” # species # species Trends in Biodiversity ? low high Heterogeneity “Landscape / Niche Heterogeneity Effect” Human interest in forest biodiversity: • Moral imperaCve to preserve natural organisms and e...
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This document was uploaded on 03/26/2014 for the course GEC AS.270.103 at Johns Hopkins.

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