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| | USGCRP Seminar: Origin, Incidence, and Implications of Amazon Fires (Site not responding. Last check: 2007-10-15) |
 | | Both deforestation and forest impoverishment through logging and ground fire greatly increase the incidence of fire in Amazonia, because these land-use activities replace the tall, dense, naturally-resistant virgin forests with agricultural lands and degraded forests that are highly flammable. |
 | | If virgin forests lose this fire-break function, then large Amazonian landscapes will burn periodically, killing fire-sensitive plants and animals, reducing the amount of biomass stored in these forests by 10Ð80%, and reducing the amount of water pumped into the atmosphereÑmoisture that is necessary to maintain the water and rainfall cycles. |
 | | These forests are at the "edge" of the rainfall regime that is necessary for them to be forests, and to resist fire, and are very sensitive to slight reductions in rainfall. |
| www.usgcrp.gov /usgcrp/seminars/980324DD.html (1831 words) |
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