Calidad del agua

All manner of information about birds is presented. Following each lengthy description are full-color plates of typical members of each species with range-pattern maps for each family's genus and species.

Una guía para conocer las especies que habitan en el Parque Nacional de Doñana y su entorno, en el suroeste de la península Ibérica. 150 fichas con fotografías exclusivas realizadas por los autores del libro, con datos y características de las especies, nombres científicos y vernáculos. Un libro fundamental para la observación de la avifauna de un territorio privilegiado, considerado como el de mayor biodiversidad del sur de Europa. Humedales, bosques, playas y marismas. Un paraíso habitado por aves procedentes de Europa y África. Un espacio de 543 kilómetros cuadrados para la...

Discusses the history of the U.S. Bureau of Reclamation's operation and management of the Colorado River on behalf of the Secretary of the Interior from 1979 through 2008. Details the political, legal, institutional, and other instruments developed to address pressing issues faced by Colorado River Basin water users and managers. Reflective of its era, the 2008 volume has an increased focus on coordinated operations of the river in both the Upper and Lower Basins, on environmental matters, on the relationship with Mexico, and on Native American water settlements.

These guidelines were developed through a participatory process involving fisheries experts and managers from governments, the fishing industry, academia and non-governmental and intergovernmental organizations. They provide management guidance on factors ranging from an appropriate regulatory framework to the elements of good data collection programmes, as well as identifying key considerations and measures necessary for ensuring the conservation of target and non-target species.