Biological invasion is one of the main threats to native biodiversity. For a species to become invasive, it must be voluntarily or involuntarily introduced by humans into a nonnative habitat. Mammals were among first taxa to be introduced worldwide for game, meat, and labor, yet the number of species introduced in the Neotropics remains unknown. In this data set, we make available occurrence and abundance data on mammal species that (1) transposed a geographical barrier and (2) were voluntarily or involuntarily introduced by humans into the Neotropics. Our data set is composed of 73,738 historical and current georeferenced records on alien mammal species of which around 96% correspond to occurrence data on 77 species belonging to eight orders and 26 families. Data cover 26 continental countries in the Neotropics, ranging from Mexico and its frontier regions (southern Florida and coastal‐central Florida in the southeast United States) to Argentina, Paraguay, Chile, and Uruguay, and the 13 countries of Caribbean islands. Our data set also includes neotropical species (e.g., Callithrix sp., Myocastor coypus, Nasua nasua) considered alien in particular areas of Neotropics. The most numerous species in terms of records are from Bos sp. (n = 37,782), Sus scrofa (n = 6,730), and Canis familiaris (n = 10,084); 17 species were represented by only one record (e.g., Syncerus caffer, Cervus timorensis, Cervus unicolor, Canis latrans). Primates have the highest number of species in the data set (n = 20 species), partly because of uncertainties regarding taxonomic identification of the genera Callithrix, which includes the species Callithrix aurita, Callithrix flaviceps, Callithrix geoffroyi, Callithrix jacchus, Callithrix kuhlii, Callithrix penicillata, and their hybrids. This unique data set will be a valuable source of information on invasion risk assessments, biodiversity redistribution and conservation‐related research. There are no copyright restrictions. Please cite this data paper when using the data in publications. We also request that researchers and teachers inform us on how they are using the data.
Impacto antrópico en el Manto Acuífero Barva (Heredia, Costa Rica)con énfasis en el uso del suelo (ABSTRACT Anthropic impact of the Barva aquifer (Heredia, Costa Rica) with emphasis on land use (1992)(1993)(1994)(1995)(1996)(1997)(1998)(1999)(2000)(2001)(2002)(2003)(2004)(2005)(2006). The advance of urbanization in the Central Valley of Costa Rica is having negative impacts on land use and stresses the environment with a high demand of natural resources, particularly water resources. One example is the Barva Water Table, one of the main water suppliers of semi-urban areas of the Greater Metropolitan Area of Costa Rica, which leads to conflicts between social actors involved with this resource. Comparing land use maps of the area defined by Act LXV of 1888, as well as the literature, we found that forest cover is decreasing while area covered by crops and pastures has increased from 1992 and 2006. At the same time, the forest area has undergone a process of fragmentation, and the increasing number of forest patches has an edge effect in all classes of land use. We recommend sustainable governance of water resources in the protected area's buffer zone, with the participation of the local government, development associations, and other related public and private institutions.
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