The Fate of the Amazonian Areas of Endemism

Abstract

Amazonia is the largest and most diverse of the tropical forest wilderness areas. Recent compilations indicate at least 40,000 plant species, 427 mammals, 1294 birds, 378 reptiles, 427 amphibians, and around 3,000 fishes. Not homogeneous in its plant and animal communities, it is an archipelago of distinct areas of endemism separated by the major rivers. Biogeographic studies of terrestrial vertebrates have identified eight such areas in the Brazilian Amazon: Tapajós, Xingú, and Belém (all in Brazil); Rondônia (mostly in Brazil); and portions of Napo, Imeri, Guiana, and Inambari. They range in size from more than 1.7 million km 2 (Guiana) to 199,211 km 2 (Belém). Forest loss in each ranges from 2% to 13% of their area, except for Xingu (nearly 27% lost) and Belém, (now only about one-third of its forest remains). Napo, Imeri, and Guiana have >40% of their lands in protected areas, Inambari, Rondônia, Tapajós, and Xingu between 20% and 40%, and Belém <20%. Strictly protected areas in each, however, are limited-from 0.28% to 11.7%. Areas of endemism should be the basic geographic unit for the creation of conservation corridors of contiguous protected areas, providing broad connectivity on both margins and within the interior of areas of endemism. The aim is to build a conservation system that is large and resilient enough to circumvent global changes, accommodate improved living standards for local populations, conserve biodiversity, and safeguard the ecological services forests and rivers provide. Elected leaders are now realizing that the traditional economy based on cattle ranching and logging is unsustainable. Deforestation proceeds apace, but the federal government is implementing the Protected Areas Programme for Amazonia, which seeks to protect 50 million ha, and a number of state governments are now active in creating protected areas and incorporating appropriate conservation measures in their development plans. El Destino de lasÁreas de Endemismo Amazónicas Resumen: La Amazonía es elárea de bosque tropical más grande y diversa. Compilaciones recientes indican por lo menos 40,000 especies de plantas, 427 de mamíferos, 1294 de aves, 378 de reptiles y alrededor de 3,000 de peces. No es homogénea en sus comunidades plantas y animales, sino que es un archipiélago de distintaś areas de endemismo separadas por los ríos principales. Estudios biogeográficos de los vertebrados terrestres han identificado ocho de esasáreas en la Amazonía Brasileña: Tapajós, Xingú y Belém (todas en Brasil), Rondônia (la mayor parte en Brasil) y porciones de Napo, Imeri, Guyana e Inambari. Varían en extensión desde más de 1.7 millones de km 2 (Guyana) hasta 199,211 km 2 (Belém). La pérdida de bosque en cada una varía de 2% a 13% de su superficie, excepto Xingu (casi 27%) y Belém (solo permanece cerca de una tercera parte de su bosque). Napo, Imeri y Guyana tienen >40% de su extensión enáreas protegidas, Inambari, Rondônia, Tapajós y Xingu entre 20% y 40% y Belém <20%. Sin embargo, lasáreas estrictamente protegidas en cada una son lim...

A palaeobiogeographic model for biotic diversification within Amazonia over the past three million years

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“…Amazonia is one of Earth's premier hotspots for terrestrial vertebrate endemism and species diversity [1]. Explaining this high diversity and understanding how it was assembled over time have concerned evolutionary biologists for over a century [2].…”

Inventário do polimorfismo cromático em populações de Dendrobates galactonotus (Anura: Dendrobatidae), um anuro venenoso endêmico do Brasil

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Synopsis of the genus Peperomia Ruiz & Pav. (Piperaceae) in Roraima State, Brazil

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