Geographical distribution and affinity for the substrate of green algae ( Chlorophyceae ) benthic Mexican Gulf coasts of Mexico and Caribbean Sea
AbstractThe geographical distribution of the green benthic seaweeds from the Mexican coasts of the Gulf of Mexico and the Caribbean Sea was analyzed by means of a data bank that includes 98 taxonomic publications that appeared in the 1846 - 2000 period, based on Jaccard’s index. In total, 169 species with 49 genera were recorded, with the highest species richness corresponding to Cladophora (26 species) and Caulerpa (16). Over 70.8% of all the phycoflora was confirmed based on 69 species collected by the authors in 25 localities (40.8%), and 30% through consultation of the MEXU, ENCB and DUKE herbaria. The phycological classification scheme of marine environments included 17 habitats in five coastal types where algae develop on different substrates: hard (62.5%), soft (48.4%), animal (36.8%), plant (30%), floating (11%), and artificial (12.2%). The distinction between two provinces along the Mexican coasts of the Atlantic Ocean Basin was confirmed: one corresponding to a rich tropical phycoflora along the southern coast, from Quintana Roo to Veracruz (Caribbean Province), and the other extending along the subtropical waters and being poor in species (Carolinean Province). Cabo Rojo is the boundary between the tropical and the subtropical coasts of Mexico.
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