Environmental status of the Gulf of California: A pollution review

Last modified: 
April 21, 2017 - 4:44pm
Type: Journal Article
Year of publication: 2017
Date published: 03/2017
Authors: Federico Páez-Osuna, Saúl Álvarez-Borrego, Ana Ruiz-Fernández, Jacqueline García-Hernández, Martín Jara-Marini, Magdalena Bergés-Tiznado, Alejandra Piñón-Gimate, Rosalba Alonso-Rodríguez, Martín Soto-Jiménez, Martín Frías-Espericueta, Jorge Ruelas-Inzunza, Carlos Green-Ruiz, Carmen Osuna-Martínez, Joan-Albert Sanchez-Cabeza
Journal title: Earth-Science Reviews
Volume: 166
Pages: 181 - 205
ISSN: 00128252

The Gulf of California (GC) is an unique large ecosystem characterized by its rich biodiversity, high biological productivity and endemism of marine life. However, as many other large ecosystems worldwide, it is subject to diverse anthropogenic pressures (overfishing, climate change, losses of biodiversity and habitats, and pollution). We reviewed over 150 studies dealing with contaminants in water, sediments and representative organisms from the GC, and here we discuss the main issues associated to the presence of metals, metalloids, persistent organic pollutants (POPs, including polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), brominated diphenyl ethers (deca tri-a) (PBDEs), and several other pesticides), plastics, nutrients and algal blooms. The GC ecosystems have been subject to a wide range of pollution sources. Nevertheless, the pollution levels remain relatively low to moderate depending on the location and contaminant type. Contamination hotspots are found i) for metals and metalloids, in sites where mining spills have occurred and ii) for nutrients and pesticides, in wetlands that receive discharges from intensive agricultural and shrimp farming. We also identified sites where harmful algal blooms (HABs) have been observed. However, numerous coastal environments in GC, affected by pollution sources and events have yet been poorly studied. More detailed, extensive and comprehensive studies on the pollution levels and trends, transfer and toxic effects are still needed.

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