Upwelling on the Yucatan Shelf: hydrographic evidence

Merino, Martı́n

doi:10.1016/s0924-7963(96)00123-6

Cited by 180 publications

(175 citation statements)

References 11 publications

Supporting

Mentioning

147

Contrasting

Unclassified

Order By: Relevance

“…Topographical upwelling in the east of the Yucatan Shelf is thought to be responsible for the suppression of photozoan carbonates on the eastern shelf. The Yucatan Shelf receives no terrigenous input, because no fresh water reaches the coastline of the highly karstified hinterland (Merino 1997). Sea surface temperatures average between 24 and 30°C, but cool, nutrient-rich upwelling waters (17-18°C) from the Yucatan channel periodically (in spring and early summer) reach the eastern side of the shelf (Merino 1997), leading to temporarily increased primary production on the order of 1 mg * m -3 Chl-a, which corresponds to meso-/eutrophic conditions (Martínez-López and Zavala-Hidalgo 2009).…”

Section: Yucatan Shelf Off Mexicomentioning

confidence: 99%

Heterozoan carbonates in subtropical to tropical settings in the present and past

Westphal

Halfar

Freiwald

2010

Int J Earth Sci (Geol Rundsch)

View full text Add to dashboard Cite

Water temperature has received considerable attention as steering factor for the genesis of different types of marine carbonate sediments. However, parameters other than temperature also strongly influence ecosystems and, consequently, the carbonate grain associations in the resulting carbonate rock. Among those factors are biological evolution, water energy, substrate, water chemistry, light penetration, trophic conditions, CO 2 concentrations, and Mg/Ca ratios in the seawater. Increased nutrient levels in warm-water settings, for example, lead to heterotrophicdominated associations that are characteristic of temperate to cool-water carbonates. Failure to recognize the influence of such environmental factors that shift the grain associations towards heterotrophic communities in low latitudes can lead to misinterpretation of climatic conditions in the past. Modern analogues of low-latitude heterozoan carbonates help to recognize and understand past occurrences of heterozoan warm-water carbonates. Careful analysis of such sediments therefore is required in order to achieve robust reconstructions of past climate.

show abstract

Section: Yucatan Shelf Off Mexicomentioning

confidence: 99%

Heterozoan carbonates in subtropical to tropical settings in the present and past

Westphal

Halfar

Freiwald

2010

Int J Earth Sci (Geol Rundsch)

View full text Add to dashboard Cite

show abstract

“…On the other hand, the taxa of the TCA appear linked at high temperatures and especially to high turbidity which makes sense if we know that the location of this assemblage is exactly off the main download area of inland waters carrying large amount of sediments and organic matter, which consequently creates areas of low concentration of oxygen, as showed by Padilla-Pilotze et al (1990). Taxa of YA appear related to high salinity and low turbidity, which seems a logical condition if we know that the waters covering the Yucatan shelf are a branch of the Yucatan current with more oceanic that coastal character (Merino 1997, Mühling et al 2013 The composition and distribution of fish larvae species in Campeche Bank and Campeche Bay depend first on the habitat and the reproductive strategies of the adults, which include the spawning areas (Flores-Coto et al 1988, 1993, Sanvicente-Añorve et al 2000, Espinosa-Fuentes & Flores-Coto 2004. This is a general fact worldwide (Rakocinski et al 1996, Sabatés & Olivar 1996, Miller 2002, Marancik et al 2005, Sabatés et al 2007, for which the complement establishing differences among the assemblages are the factors that determine the hydrodynamics of each region.…”

Section: Discussion Assemblages and Regionalizationmentioning

confidence: 99%

“…Campeche Bank is a wide shelf north and northwest of the Yucatan peninsula, basically a calcareous area with its western boundary at the Campeche canyon; here the main predominant feature is a westward and southwestward circulation along the northern and western littorals of the peninsula, respectively, throughout the year as result of a branch of the Yucatan current that flows along the Campeche Bank carrying water from the upwelling off Cabo Catoche (Merino 1997, Zavala-Hidalgo et al 2003. In the Campeche Bank there are series of small reefs, some of which have formed islands, and the coastal lagoons adjacent to this shelf have no freshwater discharges or any connection with rivers.…”

Section: Introductionmentioning

confidence: 99%

Environmental factors affecting structure and spatial patterns of larval fish assemblages in the southern Gulf of Mexico

Flores-Coto

Sanvicente‐Añorve

Zavala-García

et al. 2014

Rev. biol. mar. oceanogr.

View full text Add to dashboard Cite

Resumen.-Se estudiaron los factores ambientales que afectan las asociaciones de larvas de peces en el sur del Golfo de México. Las muestras se obtuvieron con redes Bongo de superficie a 200 m, en 46 estaciones, en primavera 2006. A cada taxón de larvas se le asignó el hábitat de sus adultos. Las asociaciones de larvas se definieron por el índice de Bray-Curtis. Se registró un total de 182 taxones, la mayoría oceánicos, de plataforma media y arrecifales. Se definieron 3 comunidades, Yucatán (YA), Tabasco-Campeche (TCA) y Oceánica (OA). YA se ubicó sobre el Banco de Campeche, en la amplia plataforma de Yucatán, donde el proceso hidrodinámico más importante es una rama de la corriente de Yucatán. TCA ocupó la plataforma de Tabasco y suroeste de la plataforma de Campeche, caracterizada por la descarga de aguas continentales. OA ocupó el área oceánica de la Bahía de Campeche, donde el proceso hidrodinámico dominante es un giro ciclónico casi permanente. Como resultado de diferentes hechos hidrográficos, sean corrientes oceánicas, presencia de giros o d escargas de aguas dulces, y la topografía; la plataforma de Tabasco, el Banco de Campeche (plataforma de Yucatán) y la Bahía de Campeche constituyen regiones con escenarios ambientales claramente contrastantes. La di stribución g eográfica de las 3 asociaciones de larvas se ajusta bien con estas 3 áreas de diferente hidrodinámica. La estructura y distribución espacial de las asociaciones de larvas está determinada en primer lugar por el hábitat y áreas de desove de sus adultos, siendo después modulada por las forzantes hidrográficas que caracterizan cada área. Palabras clave: Asociaciones de larvas de peces, hidrodinámica, Golfo de MéxicoAbstract.-The environmental factors that affect larval fish assemblages in the southern Gulf of Mexico were studied. Samples were collected with a Bongo net from the surface to a depth of 200 m, at 46 sampling stations, during spring 2006. The adult habitat was assigned to each larval fish taxon. Larval assemblages were defined by the Bray-Curtis index. A total of 182 taxa were found, of which most were oceanic, mid shelf and reef. Three assemblages were defined: Yucatan (YA), TabascoCampeche (TCA) and Oceanic (OA). The YA was located on the Campeche Bank, the wide Yucatan shelf where the most important hydrodynamic processes is a branch of Yucatan current. The TCA occupi ed the shelf of Tabas co and the southwestern shelf of Campeche, characterized by the continental freshwater discharge. The OA occupied the oceanic area of Campeche Bay, where the dominant hydrodynamic process is an almost permanent cyclonic gyre. As a result of the different hydrographic features, which are ocean currents, presence of gyres, freshwater discharge, and the topography; the Tabasco shelf, Campeche Bank (Yucatan shelf) and Campeche Bay constitute different regions. They are regions with clearly contrasting environmental scenarios. The geographic distribution of the 3 assemblages fitted well with these 3 hydrodynamically different areas. The structure and ...

show abstract

“…La Corriente de Yucatán que fluye a lo largo de la costa de Quintana Roo y con una velocidad promedio de 0.75 nudos, entra al Golfo de México a través del Canal de Yucatán, que forma en el extremo oriental la Corriente de Lazo (Merino 1994). El clima es de tipo cálido-semiseco con régimen de lluvias en verano y escasas el resto del año.…”

Section: Materiales Y Métodosunclassified

Variaciones estacionales de la estructura comunitaria del fitoplancton en zonas de descarga de agua subterránea en la costa norte de la Península de Yucatán

Álvarez-Góngora¹,

Liceaga-Correa²,

Herrera-Silveira³

2012

RBT

View full text Add to dashboard Cite

Seasonal variations of community structures phytoplankton in groundwater discharge areas along the Northern Yucatán Peninsula coast. The highly touristic Yucatán Peninsula is principally constituted with coastal marine environments. Like other coastal areas, this has been affected by the increase of waste water discharge, hydrological modifications and land use changes in the area. The phytoplankton community structure is one of the main components of coastal ecosystems and the most affected in hydrological processes. In order to follow the seasonal variations, the phytoplankton was characterized to follow the hydrological variability in two sites (Dzilam and Progreso) of the Northern Yucatán Peninsula. For this, cruises were carried out monthly during one year, from April 2004 to March 2005, with two samplings per season (dry, rainy and "nortes"). Hydrological variability was associated with seasonality and directly linked to groundwater discharges in the Dzilam area, and waste water discharges in the Progreso area. The highest nutrient concentrations occurred mainly during the rainy season. The phytoplankton community changes observed throughout the year suggested that the hydrological and chemical variability associated with seasonality and anthropogenic impacts have a strong influence. The substitution of diatoms by dinoflagellates as the dominant group in Progreso was the result of seasonal variability itself, but also could have been caused by eutrophic processes; while in Dzilam, the major presence of diatoms could have been favored by groundwater discharges. The results of this study can be used to understand the linkages between stressors from the anthropogenic activities and coastal water quality and changes. Rev. Biol. Trop. 60 (1): 157-172. Epub 2012 March 01.

show abstract

Upwelling on the Yucatan Shelf: hydrographic evidence

Cited by 180 publications

References 11 publications

Heterozoan carbonates in subtropical to tropical settings in the present and past

Heterozoan carbonates in subtropical to tropical settings in the present and past

Environmental factors affecting structure and spatial patterns of larval fish assemblages in the southern Gulf of Mexico

Variaciones estacionales de la estructura comunitaria del fitoplancton en zonas de descarga de agua subterránea en la costa norte de la Península de Yucatán

Contact Info

Product

Resources

About