Biodiversidad y fronteras: cuenca del río Bermejo (Salta, Argentina)

“Biodiversity and Borders: Basin of the Rio Bermejo (Salta, Argentina)”.Biodiversity management in binational borders requires cooperative interaction, as is in thecase of the Bermejo River Basin, between Bolivia and Argentina. The purpose was to conducta survey of the biota in the sub-basin of the Rio Grande de Tarija and Seco River, duringthe dry season. This sampling took place in 2005 in Transition Forest zones, following a 100km transect between the towns of Madrejones and Ramos. There were recorded three hundredand fifty six taxa: 106 invertebrates and aquatic insects, 6 nematode parasites, 28fish, 7 amphibians and reptiles, 118 birds, 5 mammals and 92 vascular plants. Comparedto the other areas, Madrejones was the best preserved, where the major diversity in allgroups was recorded. New locations for 12 fish taxa are added to their area of distribution.Characiformes predominated over Siluriformes. Among nematodes, new capture locations, aswell as new host records and new species were reported. The avifauna was represented bymore bird species from Chaco than those coming from The Yungas. Invertebrate results weresimilar to previous studies (made in the field). This inventory constitutes the first necessarystage to implement monitoring systems and environmental protection in the area, for itssustainable management. We recommend the creation of multiple use reserves in Madrejones.