Patterns of chlorophyll-a distribution linked to mesoscale structures in two contrasting areas Campeche Canyon and Bank, Southern Gulf of Mexico

Durán-Campos, Elizabeth; Salas‐de‐León, David Alberto; Monreal‐Gómez, María Adela

doi:10.1016/j.seares.2017.03.013

Cited by 18 publications

(13 citation statements)

References 48 publications

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“…These deep maxima of chlorophyll-a layers in the Campeche Canyon have been associated with dominant phytoplankton species, including coccolithophores (Emiliana huxleyi, Gephyrocapsa oceanica, Florisphaera profunda), pennate diatoms (Nitzschia bicapitata, Nitzschia bifurcata), and dinoflagellates (Ceratium furca, Oxitoxum sp.) (Durán-Campos et al, 2017). The range of chlorophyll-a values reported here, coincided with previous studies for the southern Gulf of Mexico during summertime.…”

supporting

confidence: 92%

“…1a). Ocean dynamics and biological productivity in the region have received particular attention in recent years (Salas de León et al, 2004;Díaz-Flores et al, 2017;Durán-Campos et al, 2017;Salas-Monreal et al, 2018). Surface and subsur-__________________ Corresponding editor: Reginaldo Durazo face circulation is characterized by the presence of an anticyclonic-cyclonic eddy dipole (Salas de León et al, 2004), the occurrence of fronts over the Campeche Canyon (Aldeco-Ramírez et al, 2009) and a permanent cyclonic circulation over the Campeche Bay, delimited by the topography of the region (Díaz-Flores et al, 2017).…”

mentioning

confidence: 99%

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Optical properties of the waters of the southern Gulf of Mexico during summer

Coria-Monter

Salas‐de‐León

Monreal‐Gómez

2019

LAJAR

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The optical properties of the water column have a significant influence on phytoplankton growth. In this work, we report selected optical property values of the waters of two regions in the southern Gulf of Mexico. Measurements of natural fluorescence and photosynthetically available radiation (PAR) were made during a multidisciplinary research cruise, enabling the subsequent calculation of the light extinction coefficient (k), compensation depth (Zc), critical depth (Zcr), and compensation light intensity (Ec). The results revealed an interesting contrast between the two areas but also indicated the presence of optimal conditions for phytoplankton community growth and net primary production. These data, as reported here, could set the stage for the development of bio-optical models of light penetration, ocean color and primary productivity in the region, as well as for future analyses of organic carbon energy flow. However, many more studies are required to establish the possible seasonal variations in these parameters, which could be linked to the wide variability of the region.

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supporting

confidence: 92%

mentioning

confidence: 99%

Optical properties of the waters of the southern Gulf of Mexico during summer

Coria-Monter

Salas‐de‐León

Monreal‐Gómez

2019

LAJAR

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“…Studies on the phytoplankton community in the southern region of the GM have shown that its production is closely related to mesoscale processes in the region, such as eddies, which induce local fertilization in the euphotic layer due to the transport of nutrients (Durán-Campos et al 2017). Similar observations were made by Linacre et al (2015), showing that the distribution patterns of picoplankton biomass in the southern GM were strongly associated with the mesoscale dynamics that modulated the surface mixed layer hydrographic conditions.…”

Section: _________________ Corresponding Editor: María Morales Covarrubiassupporting

confidence: 56%

“…It is connected with the Atlantic Ocean and the Caribbean Sea through the Florida Strait and the Yucatan Channel, so, the physical properties of the water column and ocean circulation in the region are highly dynamic, encompassing upwelling processes, fronts, and the Loop Current, which in turn originate anticyclonic or cyclonic mesoscales eddies (Vázquez de la Cerda et al 2005, Díaz-Flores et al 2017. These last ones appeal to support the productivity of the region, particularly the phytoplankton one (Durán-Campos et al 2017). Moreover, in its southern portion, the GM hosts one of the largest rivers on the American continent, the Grijalva-Usumacinta system.…”

Section: _________________ Corresponding Editor: María Morales Covarrubiasmentioning

confidence: 99%

Optical characterization of the deep-waters of the Gulf of Mexico by in situ PAR during summer

Coria-Monter

Gracía

Salas‐de‐León

et al. 2021

Lat. Am. J. Aquat. Res.

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Phytoplankton is a sentinel group of organisms of climate change due to their capacity to respond to multiple stressors, so studies documenting the optimal optical conditions within the water column affecting their growth and production are imperative. As a contribution to this topic, this study report selected optical properties in deep-waters of the Gulf of Mexico by in situ measurements during summertime. A multidisciplinary research cruise was carried during August/September of 2018. A CTD instrument configured with underwater quantum and fluorescence sensors were used to acquire data of temperature, conductivity, depth, photosynthetically active radiation (PAR), and fluorescence of chlorophyll-a, which were used to determine selected optical coefficients, including the light extinction (k), the compensation light intensity (Ec), the compensation depth (Zc), the critical depth (Zcr), and the incident irradiance (E0). The Brunt-Väisälä frequency calculated from CTD data was used as a magnitude indicator of the water column stratification. The results showed a pycnocline located between 23 and 68 m depth, and favorable conditions for phytoplankton production with high values of E0 reaching 1523.4 μmol m-2 s-1, Ec values ranging from 3 to 8 μmol m-2 s-1, values of Zcr greater than Zc and maximum records of k values of 0.06. Based on multivariate statistical techniques, two zones were clearly defined. These results represent the first observational report on the optical properties in the deep region of the Gulf of Mexico. Studies on the ideal optical conditions for carrying out phytoplankton photosynthesis and their possible seasonal and interannual variability are essential to understand the processes that support the phytoplankton production, especially in regions that are characterized by their high biodiversity.

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“…The highest species richness recorded in the continental slope of the Campeche Bay (COBERPES 5), is probably influenced by the high freshwater discharge of the largest hydrological system in the southern GoM: Grijalva-Usumacinta during summer, which inputs 62% of the total freshwater to the mexican GoM (Day et al 2004), similar to what Powell et al (2003) found in the northern GoM, near the mouth of the Mississippi River. Likewise, the upwelling produced by cyclonic gyres in the Campeche Bank (De la Lanza-Espino and Gómez-Rojas 2004, Durán-Campos et al 2017), could be playing an important ecological role. These factors together incorporate large concentrations of nutrients which may trigger local productivity, and subsequently the diversity of demersal fishes on the continental slope in this region.…”

Section: Discussionmentioning

confidence: 99%

Ichthyofaunal list of the continental slope of the southern Gulf of Mexico

Ramírez¹,

Vázquez-Bader²,

Gracía³

2019

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Four oceanographic cruises were carried out between April 2011 and May 2013 on the continental slope of the southern Gulf of Mexico (GoM) in a depth range of 290 to 1200 m on board the R/V JUSTO SIERRA. A total of 91 trawls covered a total swept area of 170.49 hectares. We recorded 177 fish species belonging to 80 families. Fifteen species extended their distribution into the south of the gulf and 37 increased their depth ranges. Five species could have commercial importance: Aphanopuscarbo Lowe, 1839; Hydrolagusmirabilis (Collett, 1904); Helicolenusdactylopterus (Delaroche, 1809); Lophiusgastrophysus Miranda Ribeiro, 1915, and Merlucciusalbidus (Mitchill, 1818). The most abundant species were Polymixialowei Günther, 1859; Parasudistruculenta (Goode & Bean, 1896); M.albidus, Chlorophthalmusagassizi Bonaparte, 1840; Dibranchusatlanticus Peters, 1876; Nezumiaaequalis (Günther, 1878); Yarrellablackfordi Goode & Bean, 1896; and Laemonemabarbatulum Goode & Bean, 1883. High values of fish species richness, diversity, and evenness were registered throughout the study area. A high percentage of the fish species (97%) collected during this project are distributed in the entire GoM. Most of the species showed a wide depth distribution; however, a vertical zonation of species can be observed.

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Patterns of chlorophyll-a distribution linked to mesoscale structures in two contrasting areas Campeche Canyon and Bank, Southern Gulf of Mexico

Cited by 18 publications

References 48 publications

Optical properties of the waters of the southern Gulf of Mexico during summer

Optical properties of the waters of the southern Gulf of Mexico during summer

Optical characterization of the deep-waters of the Gulf of Mexico by in situ PAR during summer

Ichthyofaunal list of the continental slope of the southern Gulf of Mexico

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