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- Title
Hydrographic variation in a tropical coral reef system: The Veracruz Reef System, Gulf of Mexico.
- Authors
Salas-Monreal, David; Monreal-Jimenez, Rosalinda; Contreras-Tereza, Victor Kevin; Monreal-Gomez, Maria Adela; Salas-de-Leon, David Alberto; Riveron-Enzastiga, Mayra Lorena
- Abstract
• There was evidence of cold rich-nutrient oceanic water intrusion, at the Veracruz Reef System, during the summer season of 2011 and 2012, which did not reach the surface layer. • The wind depth influence at the Veracruz Reef System shows time variability, mostly reaching the sea floor from October to April at the entire reef system. • There was a clear variation in the concentration of the chlorophyll-a values over the water column along the year, which was not evident at the surface layer Three thousand forty-one profiles of temperature, salinity, density, dissolved oxygen, nitrogen and chlorophyll- a were used to study their seasonal variation on a tropical coral reef system, located in the central part, of the reef corridor of the southwestern Gulf of Mexico. The results revealed three seasons according to their hydrographic variations; the northerly wind season from September to April; the dry season from May to June; and the rainy season from July to August. The results of the density ratio during the dry season were ∼1.25 on average, while during the rainy season it had an average value of ∼0.62. Thus, the pycnocline was more influenced by the halocline during the rainy season and by the thermocline during the dry season. There was also an evident variation in chlorophyll-a concentration over the water column, which was not evident in the surface layer. During the summer (rainy season), dissolved oxygen was related to chlorophyll-a concentration; while, during the winter (northern wind season), these values were related to the vertical mixing of the water column due to wind stress. There was evidence of cooler ocean water intrusion into the Veracruz Reef System during the spring-summer season below ∼10 m. Finally, a second halocline, pycnocline, and nitrocline were found near ∼30 m depth during the rainy season.
- Subjects
GULF of Mexico; CORAL reefs &; islands; CORALS; REEFS; SUMMER; OCEAN bottom; HYDROGRAPHY
- Publication
Oceanologia, 2022, Vol 64, Issue 3, p473
- ISSN
0078-3234
- Publication type
Article
- DOI
10.1016/j.oceano.2022.03.002