title: Aquatic habitat modifications in La Plata River basin, Patagonia and associated marine areas.
abstract: This paper describes the environmental characteristics and situation of aquatic habitats and communities in southern continental and maritime areas of southeastern South America (Patagonian Shelf GIWA Subregion), resulting from an overall assessment carried out within the framework of a GIWA project, mostly on the basis of publicly available data. The main focus of the analysis was on the current situation of transboundary water resources and anthropogenic impacts. In the inland waters, habitat and community modifications result, principally, from dams and reservoirs built in the main watercourses for hydroelectric power generation and other uses. The transformation of lotic environments into lentic ones have affected habitats and altered biotic communities. In the La Plata River basin, invasive exotic species have displaced native ones. Habitats in the ocean have been degraded, as their biodiversity becomes affected by overfishing and pollution. This article includes a discussion on the causal chain and the policy options elaborated for the Coastal Ecosystem of Buenos Aires province and the Argentinean-Uruguayan Common Fishing Zone, where fishing resources are shared by both countries.
authors.affiliation: Argentine Institute of Water Resources, Patagonian Shelf's Focus for the Global International Waters Assessment (GIWA-UNEP), Buenos Aires, Argentina. vicepresidencia@iarh.org.ar
authors.forename: Ana Cristina
authors.initials: AC
authors.lastname: Mugetti
authors.forename: Alberto Tomás
authors.initials: AT
authors.lastname: Calcagno
authors.forename: Carlos Alberto
authors.initials: CA
authors.lastname: Brieva
authors.forename: María Silvia
authors.initials: MS
authors.lastname: Giangiobbe
authors.forename: Andrea
authors.initials: A
authors.lastname: Pagani
authors.forename: Silvia
authors.initials: S
authors.lastname: Gonzalez
mesh_terms: D000818:Animals; D001118:Argentina; D002677:Chile; D003247:Conservation of Natural Resources; D017753:Ecosystem; D004777:Environment; D004784:Environmental Monitoring; D005398:Fisheries; D014881:Water Supply