San Basilio

Biodiversity and conservation

Executive Summary

The bay of San Basilio, Baja California Sur, is immediately remarkable to any visitor for its stunning landscape and heterogeneity of landforms and habitats. This secret corner of the peninsula quietly boasts abundant natural resources and phenomenal biodiversity. The whole bay is alive, above and below the rich lands and waters of this coastal paradise. The marine elements include rocky reefs, and both sandy and rocky shores, which span an ecotone of taxonomic biodiversity. The land-sea fringe is home to mangroves, salt-marshes, dunes and estuaries. The influences of land and sea support the presence of a plethora of coastal species, and further inland a healthy arid scrub complex with seasonal lagoons and permanent freshwater pools is home to several rare and endangered species, and elevated numbers of species in general.

Location

The bay of San Basilio is located 52 km north of Loreto and faces the central region of the Gulf of California. The area was recognized as of ecological importance and the establishment of a marine protected area was proposed back in 2003. Almost 20 years later, the area was surveyed by a team of experts to assess the condition of the terrestrial, coastal and marine habitats.

San Basilio, a Geological Overview

San Basilio basin in Baja California Sur (Mexico) is among the youngest areas along the Gulf of California, as one of the last geological blocks being affected by extension in the Gulf of California Extensional Province. This summary is made from several papers already published by Johnson et al., including myself, and slightly adjusted. A unique area quite different within the Gulf of California, San Basilio exhibits distinct styles of volcanism that interrupted phases of normal sedimentation correlated with the Zanclean Stage (Lower Pliocene, 5.3 million to 3.6 million years ago).