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In drylands livestock grazing is the main production activity, but overgrazing due to mismanagement is a major cause of biodiversity loss. Continuous grazing around water sources generates a radial gradient of grazing in...

The first Argentine area surveyed from an odonatological point was Delta del Paraná (DP), a large wetland area of 14,000 km2 between Buenos Aires and Entre Ríos provinces, close to Buenos Aires city. This area has a ty...

Rapid economic growth in several South American countries combined with high species diversity in tropical regions has raised great concern among ecologists on the future of wildlife in those areas. One of the con- seque...