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The vast extent of the Amazon Basin has historically restricted the study of its tree communities to the local and regional scales. Here, we provide empirical data on the commonness, rarity, and richness of lowland tree species across the entire Amazon Basin and Guiana Shield (Amazonia), collected in 1170 tree plots in all major forest types. Extrapolations(More)
It should be noted that the Air Force has not experienced any eye-safety incidents during employment of militarized versions of these systems and does not limit the operation of these systems in any portion of the flight regime for eye-safety reasons. It is important to consider that aircraft-based countermeasures do not typically invoke the need to include(More)
Estimates of extinction risk for Amazonian plant and animal species are rare and not often incorporated into land-use policy and conservation planning. We overlay spatial distribution models with historical and projected deforestation to show that at least 36% and up to 57% of all Amazonian tree species are likely to qualify as globally threatened under(More)
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T he face of terrorism is changing. New adversaries , new motivations, and new rationales have surfaced in recent years to challenge the conventional wisdom on both terrorists and terrorism. More critically, perhaps, many of our old preconceptions—as well as government poli-cies—date from terrorism's emergence as a global security problem more than a(More)