Yuri OkolodkovUniversidad Veracruzana | UV · Instituto de Ciencias Marinas y Pesquerías
Yuri Okolodkov
DSc (2000), PhD (1987)
About
181
Publications
101,372
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
2,641
Citations
Introduction
My scientific interests are in the field of the taxonomy, biogeography and ecology of marine phytoplankton and sea-ice algae, with an emphasis on dinoflagellates (Dinoflagellata). During the last 20 years, I have worked in the Mexican Pacific and the Gulf of Mexico, which resulted in collection of macroalgae, planktonic and benthic microalgae (since 2018 using SCUBA down to 30-35 m).
Additional affiliations
March 2005 - present
August 2003 - March 2005
Publications
Publications (181)
Background: In the coastal waters of the northern Yucatan Peninsula, in the southeastern Gulf of Mexico, numerous pelagic algal blooms have been recorded in the 21st century. In August 2010, an unknown small-sized Peridiniales species caused an intense bloom in the Sisal marina. In subsequent years, it was
occasionally found at other sites along th...
Plankton studies in Guatemala are associated with the history of harmful algal blooms (HAB). An important event was observed in 1987, with 193 human poisonings due to shellfish consumption, of which 22 were lethal. The causative organism was Pyrodinium bahamense var. compressum. This species was reported again in November 2019 in the coastal Guatem...
Thecal morphology and morphometry of the planktonic dinoflagellate Protoperidinium paulseni (Pavill.) Balech were studied in samples taken in the northwestern Black Sea (Odessa Bay). Using epifluorescence microscopy and SEM, data on the apical pore complex, apical intercalary, sulcal and cingular plates were obtained for the first time; the presenc...
RESUMEN Un total de 326 helmintos parásitos fueron recuperados de 94 especímenes de Halichoeres bivittatus (Pisces: Labridae) en dos sitios de la zona arrecifal en los límites del Parque Nacional Sistema Arrecifal Veracruzano, Veracruz, México, el suroeste del Golfo de México: Punta Gorda (n = 51) y Mata de Uva (n = 43). Los peces fueron capturados...
The genus Amphidinium Clap. & J. Lachm. comprises a high diversity of planktonic and benthic (epiphytic and sand-dwelling) dinoflagellates from marine and freshwater ecosystems. High morphological plasticity and vaguely defined genus characteristics (e.g., a small epicone size) have complicated the clear delineation of species boundaries. Although...
Citation: Gómez-Figueroa, J.A.; Rendón-von Osten, J.; Poot-Delgado, C.A.; Dzul-Caamal, R.; Okolodkov, Y.B. Seasonal Response of Major Phytoplankton Groups to Environmental Variables along the Campeche Coast, Southern Gulf of Mexico. Phycology 2023, 3, 270-279. Abstract: To describe the seasonal response of the major phytoplankton groups to environm...
Un total de 326 helmintos parásitos fueron recuperados de 94 especímenes de Halichoeres bivittatus (Pisces: Labridae) en dos sitios de la zona arrecifal en los límites del Parque Nacional Sistema Arrecifal Veracruzano, Veracruz, México, el suroeste del Golfo de México: Punta Gorda (n = 51) y Mata de Uva (n = 43). Los peces fueron capturados entre m...
Background:
Mexican studies on marine benthic dinoflagellates (MBD) began in 1942 from the offshore region of Oaxaca, based on water column samples. Subsequently, in ten Mexican maritime states, both epibenthos and plankton samples have been collected, species have been cultured, and field and laboratory studies have been carried out.
Goals:
The o...
Background. Illustrated records of the Podolampadaceae from Mexican waters are scarce. Goals. To study the thecal morphology of the genera Blepharocysta and Podolampas and to document the occurrence of planktonic species in both Atlantic and Pacific waters around Mexico were the main objectives of the present study. Methods. Bottle and net samples...
RESUMEN. Coolia es un género que actualmente incluye ocho especies de dinoflagelados epibentónicos, siendo un grupo de interés debido a las toxinas que producen algunas especies del género (por ejemplo, cooliatoxina) y por las asociaciones que presentan con otros géneros de dinoflagelados epibentónicos toxigénicos (Ostreopsis, Amphi-dinium, Proroce...
Background.
Illustrated records of the Podolampadaceae from Mexican waters are scarce.
Goals.
To study the thecal morphology of the genera Blepharocysta and Podolampas and to document the occurrence of planktonic species in both Atlantic and Pacific waters around Mexico were the main objectives of the present study.
Methods.
Bottle and net sample...
In September and November 2016, eight marine sampling sites along the coast of the
southeastern Gulf of Mexico were monitored for the presence of lipophilic and hydrophilic toxins. Water temperature, salinity, hydrogen potential, dissolved oxygen saturation, inorganic nutrients and phytoplankton abundance were also determined. Two samples filtered...
Many benthic dinoflagellates produce polyketide-derived polyether toxins responsible for diverse seafood poisoning syndromes, such as diarrhetic shellfish poisoning and ciguatera fish poisoning. In Mexico, bHAB events have received recent public health and scientific attention, but many species lack molecular identification, and phylogeographic and...
Se presenta el primer registro del género Halopteris Kützing para México, el alga parda Halopteris filicina (Grateloup) Kützing (Sphacelariales: Stypocaulaceae), especie tipo del género Halopteris Kützing. El ejemplar fue encontrado en aguas someras costeras cerca de Uaymitún en el norte de la península de Yucatán en agosto de 2017. La descripción...
To describe the phytoplankton species composition, spatio-temporal distribution and habitats during different seasons along the central coast of the state of Campeche, Mexico, southeastern Gulf of Mexico, eight shallow-water (ca 1 m) sites from the city of Campeche Southwest to Villamar were monitored monthly from September 2016 to June 2017 by tak...
Oiling scenarios following spills vary in concentration and usually can affect large coastal areas. Consequently, this research evaluated different crude oil concentrations (10, 40, and 80 mg L−1) on the nearshore phytoplanktonic community in the southern Gulf of Mexico. This experiment was carried out for ten days using eight units of 2500 L each;...
Background. In Mexico, few studies have been carried out on epibiosis. Epizoic diatoms are used as biological
indicators of ecosystems due to their apparent epibiont specificity with host animals. Little is known
about this specificity in the planktonic larval phases. There have been no studies focused on epizoic diatoms
on the marine gastropod Ali...
The records of harmful algal blooms from 2005 to 2019 in the coastal waters of the state of Campeche, SE Gulf of Mexico, are described.
The marine dinoflagellate genus Prorocentrum Ehrenberg comprises many species occupying primarily benthic or epiphytic habitats, particularly in tropical and sub-tropical waters. Despite concerted efforts to establish phylogenetic associations, there remain unresolved issues in defining morphospecies and membership in species complexes. The study d...
The purpose of this study was to assess the water quality at several sites with anthropogenic impact in the southeastern Gulf of Mexico. Eight sites at-pogenic activity were monitored in September and November 2016. Water temperature, salinity, pH, dissolved oxygen, inorganic nutrients, heavy metals in sediments, fecal coliforms and phytoplankton a...
Based on a case study (the Anegada de Adentro Reef, Veracruz Reef System National Park, southwestern
Gulf of Mexico), a method that allows quantifying a negative impact on hermatypic corals is proposed.
Two photo transects of 100m length at a constant depth (to avoid differences in a coral community caused
by depth) were followed. Both transects ha...
Bacterial diversity was explored among field samples and cultured isolates from coral reefs within the Veracruz Reef System. Bacterioplankton and bacteriobenthos were characterized by pyrosequencing 16S rRNA genes. Identified sequences belonged to the kingdom Bacteria and classified into 33 phyla. Proteobacteria (likely SAR11 clade) dominated in co...
Engraulicola lamothei n. sp. (Monogenea: Gastrocotylidae) is described from the gills of Chloroscombrus chrysurus (Teleostei: Carangidae) from Veracruz, southern Gulf of Mexico. This monogenean is 1110-1670 (1328) µm long and 260-550 (363) µm wide. The haptor is asymmetrical, the long side has several clamps (35-42), and the short side has a single...
Trophic networks are the way by which energy is distributed through the ecosystem and out of it. Each ecosystem at a particular functional developmental state (FDS) has attributes that can be measured and understood through the food web. Trophic interactions can further our understanding of the FDS of coral reefs that can be associated with their g...
A recently published study analyzed the phylogenetic relationship between the genera Centrodinium and Alexandrium, confirming an earlier publication showing the genus Alexandrium as paraphyletic. This most recent manuscript retained the genus Alexandrium, introduced a new genus Episemicolon, resurrected two genera, Gessnerium and Protogonyaulax, an...
The dinoflagellate genus Prorocentrum is globally represented by a wide variety of species found upon benthic and/or epiphytic substrates. Many epibenthic Prorocentrum species produce lipophilic polyether toxins, some of which act as potent protein phosphatase inhibitors and tumor-promoters associated with Diarrheic Shellfish Poisoning (DSP). Most...
A small, photosynthetic Peridiniales species caused an intense bloom (up to 37,500,000 cells/l) in the marina of Sisal on the northern Yucatan Peninsula coast, SE Gulf of Mexico, in August 2010. The salinity was 32.4, and the water temperature was 29.5 oC. The cells were 12.5-23.7 µm long (19.02±2.03 µm), 8.7-18.7 µm wide (15.45± 2.19 µm) and 7.5-1...
The genus of benthic dinoflagellates Ostreopsis is of particular interest because some species negatively impact human health and coastal marine ecosystems. Ostreopsis populations from a remote area, such as the Galapagos Marine Reserve with its unique biodiversity, can provide significant data. Samples of epibionthic dinoflagellates were collected...
Los florecimientos algales nocivos (FAN), conocidos como “mareas rojas”, son causados por el aumento en la concentración de microalgas o cianobacterias que habitan normalmente los cuerpos de agua dulce, salobre o marina del planeta. Durante un FAN, la abundancia de estos microorganismos llega a ser tan alta que en algunas ocasiones
se puede observa...
Phytoplankton dynamics in bays and open waters of the northeastern Black Sea was studied in 2005-2011. Species composition comprised 11 classes and 210 species including 19 potentially toxic species and 5 new records for the study area. The maximum species richness was found among dinoflagellates (96 species) and diatoms (78); other major taxonomic...
A recently published study analyzed the phylogenetic relationship between the genera Centrodinium and Alexandrium, confirming an earlier publication showing the genus Alexandrium as paraphyletic. This most recent manuscript retained the genus Alexandrium, introduced a new genus Episemicolon, resurrected two genera, Gessnerium and Protogonyaulax, an...
Based on the published literature from 1942 to 2018, a taxonomic list of 998 species of cyanobacteria and microalgae from the southeastern Mexican Pacific (Guerrero, Oaxaca and Chiapas states), mainly planktonic and some benthic species that belong to 9 divisions (Bacillariophyta, Dinoflagellata, Cyanobacteria, Ochrophyta, Chlorophyta, Charophyta,...
Los florecimientos algales nocivos (FAN) se presentan como un aumento en la densidad de microalgas, principalmente en zonas costeras. Estos fenómenos son eventos naturales que pueden desarrollarse por situaciones normales en el ambiente. Sin embargo, a nivel mundial se ha reportado que los FAN son cada vez más comunes, más extensos geográficamente...
En el estado de Veracruz, en el suroeste del golfo de México, hay tres principales sistemas arrecifales, los cuales presentan estructuras coralinas con diferentes grados de desarrollo. Entre estos sistemas existen otros, que aunque están menos desarrollados, pueden permitir una conectividad biológica entre todos. Tal es el caso de dos arrecifes de...
Monthly phytoplankton samples were collected from January 2013 to December 2015 at a fixed sampling site in Bahía de La Paz, Gulf of California. During this study 26 samplings were Amphidinium cf. carterae positive. The highest densities of A. cf. carterae (754.2×103 to 1022.4×103 cells L−1) were recorded during a bloom detected in January 2015 whe...
The purpose of this study was to establish a series of indicators of water quality in relation to the structure of the phytoplankton community, particularly those that favor the presence of harmful phytoplanktonic species along the Campeche central coast, southeastern Gulf of Mexico.
Many benthic dinoflagellates are known or suspected producers of lipophilic polyether phycotoxins, particularly in tropical and subtropical coastal zones. These toxins are responsible for diverse intoxication events of marine fauna and human consumers of seafood, but most notably in humans, they cause toxin syndromes known as diarrhetic shellfish p...
Data on the diversity of dinoflagellates of the Black Sea (BS) obtained from all BS countries
(Russia, Georgia, Turkey, Bulgaria, Romania and Ukraine) from 1886 to 2018 are critically
ummarized. The revised list of the BS Dinoflagellata includes 420 species (447 including
infraspecific taxa) from 92 genera that belong to 47 families, 16 orders and...
Las diatomeas (Bacillariophyta) bentónicas contribuyen significativamente a la comunidad del microfitobentos marino. Las imágenes obtenidas usando el microscopio electrónico de barrido JEOL JSM-7600F presentan 20 especies de diatomeas (sus frústulas de sílice) de 20 géneros. Estas fueron adheridas a los pastos marinos y diversas macroalgas (epifíti...
La malaria o paludismo es causa de muerte de entre 700,000 y 2,7 millones de personas por año, principalmente entre los niños de África. Cada año se presentan aproximadamente 400 millones de casos de malaria. Recientemente, los científicos empezaron estudiar más detalladamente el fenómeno de la ciguatera, conocido desde el
siglo XVI, y han determin...
Cyanobacteria inhabit hypersaline, marine and freshwater environments. Some toxic and non-toxic species can form harmful blooms. The aim of this study was to identify potentially harmful cyanobacterial species in the oyster banks of Términos Lagoon, the southeastern Gulf of Mexico. Six sample sites (up to 2-m depth) were monitored monthly from Augu...
From December 2016 to May 2017, 22 phytoplankton surface samples were collected with a 20-μm mesh net at three islands of the Archipiélago de Revillagigedo (Partida, Socorro and San Benedicto), Mexican Pacific. The site depth was approximately 20–80m; the surface water temperature was 21–27°C. The potentially toxic benthic dinoflagellate Ostreopsis...
Strains of a dinoflagellate from the Salton Sea, previously identified as Protoceratium reticulatum and yessotoxin producing, have been reexamined morphologically and genetically and Pentaplacodinium saltonense n. gen. et sp. is erected to accommodate this species. Pentaplacodinium saltonense differs from Protoceratium reticulatum (Claparède et Lac...
To define the structure of the phytoplankton community, with emphasis on harmful species in the oyster banks of Terminos Lagoon, SE Gulf of Mexico, six stations were monitored monthly from July 2012 to May 2013. Water temperature, salinity, hydrogen potential, dissolved oxygen and abundance of phytoplankton were measured. The temperature and salini...
Chlorophyll-a concentration and phytoplankton abundance data obtained during two cruises (April 1983 and June 1979) were used to study phytoplankton horizontal and vertical distributions in the waters of the Yucatan shelf. Water-bottle samples were taken to 200 m depth at 60 stations. The maximum mean (from different depths per station) phytoplankt...
During 2005–2011, 418 phytoplankton samples were collected in Novorossiysk and Tuapse ports and near the resort cities of Anapa and Gelendzhik in the northeastern Black Sea. The maximal values of both abundance and biomass of phytoplankton related to high nutrient concentration, probably due to anthropogenic load, were observed at Novorossiysk (5.8...
Eutrophication causes the major impact in the coastal waters of the state of Yucatan. In general, loss of water quality and biological communities and massive development of toxic microorganisms are some of the consequences of this phenomenon. To reveal changes in species composition and cell abundance of the taxocoenosis of epibenthic dinoflagella...
The State of Baja California Sur (BCS), Mexico, possesses 2200 km of littoral, of which 1400 km are on the west coast and 800 km are on the east coast (Gulf of California). The first phytoplankton studies of the Baja California Peninsula were published by W.E. Allen in 1923 and 1924. Although the number of phytoplankton
studies published by Mexican...
The Gulf of California is a semi-enclosed water body known for its high biodiversity and productivity, with approximately 3000 km of coastline. Although harmful algal blooms (HABs) have been known since the arrival of the Spanish conquerors in the 16th century, it was only after the 1979 bloom of the toxic dinoflagellate Gymnodinium catenatum that...
Approximately 500 km of the littoral of the state of Guerrero, Mexico, represent a high diversity of tourist attractions and are subjected to exploitation of numerous coastal resources, particularly bivalve mollusks. Harmful algal blooms (HAB) are common in this state. Bahía de Acapulco is the water body with the major number of bloom events. In 19...
The effect of global warming on marine ecosystems may benefit the formation of harmful algal blooms. However, our understanding of the effect of higher water temperatures on the growth of harmful benthic dinoflagellates in the environment is practically unknown. The effect of increasing water temperatures from 5 to 30°C on the growth of two strains...
Approximately 500 km of the littoral of the state of Guerrero, Mexico, represent a high diversity of tourist attractions and are subjected to exploitation of numerous coastal resources, particularly bivalve mollusks. Harmful algal blooms (HAB) are common in this state. Bahía de Acapulco is the water body with the major number of bloom events. In 19...
The State of Baja California Sur (BCS), Mexico, possesses 2200 km of littoral, of which 1400 km are on the west coast and 800 km are on the east coast (Gulf of California). The first phytoplankton studies of the Baja California Peninsula were published by W.E. Allen in 1923 and 1924. Although the number of phytoplankton
studies published by Mexican...
Cyanobacteria as a whole show a cosmopolitan distribution, inhabiting hypersaline, marine and freshwater environments, so they have a wider range of habitats than phototrophic eukaryotes. Some species can form harmful blooms caused by toxic and non-toxic species. The aim of this study was to identify the species composition of potentially harmful c...
Términos Lagoon is one of the key ecosystems in the southern Gulf of Mexico and has been the focus of both national and international attention because of its ecological and economic importance and due to the potential impact on this ecosystem exerted by human activities such as urban development, agricultural, oil and gas activities, overfishing,...
A circadian rhythm of the dinoflagellate Peridinium quadridentatum was studied at a time-series station in the southwestern Gulf of Mexico, in May 2007. Different substrates (water column, the seagrass Thalassia testudinum, macroalgae, coral rubble and sandy sediment surface) were sampled at the site at 1.5–3.5 m depth. In the samples of coral rubb...
Traditionally, the use of ecological indices has been supported by measurements and determinations of physical and chemical characteristics of the water when scientists were unable to detect damage in biological communities. In this context, a brief historical overview of biological indicators, considering the assessment of water quality through mi...
This bilingual guide brings together a review of 26 scientific articles (2003–2015) that contain information on some strains of the Marine Dinoflagellate Collection (CODIMAR, by its Spanish acronym), and illustrates, using file cards and photographic sheets, taxonomic and morphological characteristics of 26 species of the genera Akashiwo, Alexandri...
In the coastal waters of the state of Campeche, basic information is needed on the presence of harmful phytoplankton species. For this purpose, in 2012-2013 over the course of a year, the water column was monitored monthly at the Puntilla dock, adjacent to the Terminos Lagoon, SE Gulf of Mexico. Water temperature, salinity, pH, dissolved oxygen sat...
Traditionally, the use of ecological indices has been supported by measurements and determinations of physical and chemical characteristics of the water when scientists were unable to detect damage in biological communities. In this context, a brief historical overview of biological indicators, considering the assessment of water quality through mi...
To determine the epiphytic dinoflagellate taxocoenosis, to study the vertical distribution of dinoflagellates along the leaves of the seagrass Thalassia testudinum and to evaluate the potential risk of ciguatera, based on the year-round sampling at Dzilam, the northern Yucatan Peninsula, were the main objectives. Seagrass samples were taken monthly...
To define the composition of the phytoplankton community, with an emphasis on harmful species, 6 stations were monitored monthly in the oyster beds of Términos Lagoon, SE Gulf of Mexico, from August 2012 to September 2013. Water temperature, salinity, hydrogen potential, oxygen saturation, inorganic nutrients and abundance of phytoplankton were det...
Contamination of coastal zones in Mexico is principally from anthropogenic origin, due mainly to excessive contributions of nitrogen and phosphorus compounds to the seawater, which it has given rise to constant eutrophication processes. This nutrients enrichment has favored the reproduction of certain microalgae groups that forming aggregations of...
Harmful algal blooms are a threat to coastal ecosystems and human health. Among diatoms, several species of the genus Pseudo-nitzschia could represent a major concern because of their toxicity and cause of amnesic shellfish poisoning (asp). The objective of this research is to study the annual dynamics of Pseudo-nitzschia in the Veracruz Reef Syste...
Se presentan las descripciones de 21 especies de algas rojas colectadas en marzo y noviembre de 2008 y junio de 2010. Estas se consideran nuevos registros para el arrecife Cabezo ubicado en la parte sureste del Parque Nacional Sistema Arrecifal Veracruzano (PNSAV) en el suroeste del Golfo de México, y pertenecen a los géneros Amphiroa, Bryothamnion...
RESUMEN El fitoplancton del Parque Nacional Sistema Arrecifal Veracruzano (PNSAV) ha sido estudiado principalmente en su diversidad y ecología. De las especies fitoplanctónicas hasta ahora registradas (326 taxones) destacan cuantitativamente las diatomeas (163) y dinoflagelados (158); otros grupos como las rafidofitas o la fracción picofitoplanctón...
The name Mesophyllum erubescens has been applied to protuberant rhodolith specimens which sometimes occur abundantly, as well as to encrusting specimens in tropical and temperate waters in the Western Pacific, Indian and Western Atlantic Oceans. A DNA sequence, representing about 20% of the rbcL gene, was obtained from the 140 year old holotype spe...
An updated revision of national laws and international conventions, agreements and treaties about control and management of ships’ ballast water and biofouling is presented in a historical context. Recent international regulations and projects are discussed. The participation of Mexico and its perspective are emphasized, and the International Conve...
Recently, the port of Veracruz and its suburbs have experienced accelerated population, industrial and port growth. This growth is directly tied to coastal areas and is reflected in various phenomena such as increases in organic matter and turbidity, decreases in oxygen concentration, and increases in harmful algal blooms (HABs), a phenomenon that...
The coastal zone of the State of Yucatan, se Gulf of Mexico, characterized by the presence of subterrestrial
water discharges, comprises a wide diversity of habitats (exposed coast, semi-enclosed brackish water and hypersaline lagoons, fringe mangroves) that favors the development of the taxocoenosis of benthic/epiphytic dinoflagellates. To identif...
Based on sampling during the period of August 2001- July 2013 (quantitative water samples analyzed using the Utermöhl technique), data on microalgal species responsible for HAB (harmful algal blooms) and their abundances in the coastal waters of the northern Yucatan Peninsula in the southeastern Gulf of Mexico are presented. The dinoflagellates Scr...
Los florecimientos algales nocivos (FANs), a veces también llamadas mareas rojas, son fenómenos naturales. En las aguas costeras del sur del Golfo de México, este fenómeno ha sido documentado por lo menos desde 1792. A partir del 2001, los FANs han mostrado la tendencia a crecer en términos de su frecuencia, intensidad y ampliación de la región geo...
Data on abundances of >100,000 cells/L of the benthic-planktonic diatom Cylindrotheca closterium as a causative agent of harmful algal blooms (HABs) in the coastal waters of the northern Yucatan Peninsula, with an emphasis on four marinas (Chuburná, Yucalpetén, Telchac and Dzilam) in 2001-2014 (fortnight and monthly monitoring), are presented. The...
Recently, harmful algal blooms that affected fisheries, aquaculture and coastal ecosystems were reported
from the northern Yucatan Peninsula. To determine potentially harmful dinoflagellates in the fisheries and
aquaculture areas was the main objective of the present study. From May to October 2013, a total of 99 of
both qualitative (net) and quant...
Samples collected during the period 2001–2013 along the northern coast of the Yucatan Peninsula revealed two species of the genus Scrippsiella, S. trochoidea and S. spinifera, that caused blooms of up to 39400000 cells/L. While they cannot be distinguished well with an inverted light microscope during counting procedures, the species are readily se...
A critical question regarding the organic carbon cycle in the Arctic Ocean is whether the decline in ice extent and thickness and the associated increase in solar irradiance in the upper ocean will result in increased primary production and particulate organic carbon (POC) export. To assess spatial and temporal variability in POC export, under-ice...
Las diatomeas son microalgas eucariota unicelulares con una pared celular silicificada llamada frústula, la cual está compuesta de dos valvas que encajan como lo hace una caja de Petri. Por su origen, las diatomeas se encuentran junto con las feófitas (macroalgas marinas), rafidofíceas (microalgas marinas) y crisofíceas (principalmente dulceacuícol...
Se estudió a los dinoflagelados epífitos en 250 muestras de 10 sitios en Chelem (una laguna rodeada parcialmente por manglar) y Dzilam de Bravo (una localidad costera expuesta), en la costa norte de la Península de Yucatán, obtenidas durante cinco exploraciones en 2008-2009. Se midió la temperatura, salinidad, turbidez, pH, oxígeno disuelto, nitrat...
Epiphytic dinoflagellates were studied in 250 samples from 10 sites in Chelem (a semi-enclosed mangrove lagoon) and Dzilam de Bravo (an exposed coastal locality), on the northern coast of the Yucatan Peninsula, during five surveys in 2008-2009. Temperature, salinity, turbidity, pH, dissolved oxygen, nitrates, nitrites, phosphates, silicates, urea,...
The morphology of 38 species from eight genera of the order Dinophysiales was studied based on about seven hundred 20 μm phytoplankton net samples taken from May 2005 through April 2008 at 27 sampling stations in the National Park Sistema Arrecifal Veracruzano, southwestern Gulf of Mexico. Short descriptions and synonyms are given for each species....
El puerto de Veracruz y zona conurbada han tenido un aumento poblacional, industrial y portuario muy acelerado en los últimos años. Este crecimiento tiene una repercusión directa con la zona costera que se refleja en distintos fenómenos como son un aumento de materia orgánica y turbidez, disminución de la concentración de oxígeno, y un fenómeno que...
A critical question regarding the organic carbon cycle in the Arctic Ocean is whether the decline in ice extent and thickness and the associated increase in solar irradiance in the upper ocean will result in increased primary production and particulate organic carbon (POC) export. To assess spatial and temporal variability in POC export, under-ice...
To define the structure of the phytoplankton community, with emphasis on harmful species in the oyster banks of Terminos Lagoon, SE Gulf of Mexico, six stations were monitored monthly from July 2012 to May 2013. Water temperature, salinity, hydrogen potential, dissolved oxygen and abundance of phytoplankton were measured. The temperature and salini...
To define the structure of the phytoplankton community, with emphasis on harmful species in the oyster banks of Terminos Lagoon, SE Gulf of Mexico, six stations were monitored monthly from July 2012 to May 2013. Water temperature, salinity, hydrogen potential, dissolved oxygen and abundance of phytoplankton were measured. The temperature and salini...
Based on long-term monitoring (2001-2012) and four oceanographic cruises (2010-2012) in the coastal and
shelf waters of the Yucatan Peninsula, SE Gulf of Mexico, a list of 306 strictly phytoplanktonic and tychoplanktonic species from 131 genera is presented: centric diatoms (83 species), raphid diatoms (47), araphid diatoms (22), Dinoflagellata (12...
Descriptions of 21 red algal species collected in March and November 2008 and June 2010 are given. They are considered new records for Cabezo reef in the southeastern part of the National Park Sistema Arrecifal Veracruzano (NPSAV), southwestern Gulf of Mexico. The new records belong to the genera Amphiroa,
Bryothamnion, Ceramium, Ceratodictyon, Col...
Descriptions of 21 red algal species collected in March and November 2008 and June 2010 are given. They are considered new records for Cabezo reef in the southeastern part of the National Park Sistema Arrecifal Veracruzano (NPSAV), southwestern Gulf of Mexico. The new records belong to the genera Amphiroa, Bryothamnion, Ceramium, Ceratodictyon, Col...
Los mares de nuestro planeta están llenos de organismos invisibles para un bañista. Entre estas, se destacan los dinoflagelados, notados más por las consecuencias de su reproducción rápida o acumulación visible para el ojo humano, conocidas como mareas rojas o florecimientos algales nocivos, que pueden ser tóxicos o no tóxicos. Estos eventos repres...
A low voltage scanning electron microscopy regime is proposed for routine examination of the
non-metalized thecae of marine dinoflagellates, using a JEOL JSM-7600F Field Emission scanning
electron microscope with a Schottky field-emission electron gun. The selected options were as
follows: voltage 1–1.5 kV (sometimes up to 2 kV), working distance 1...
Descriptions of 13 green and 12 brown algal species from 20 genera and 15 families collected on Cabezo Reef of the National Park Sistema Arrecifal Veracruzano in the southwestern Gulf of Mexico, which are new records for the reef, are given. The species belong to the chlorophyte genera Caulerpa, Cladophoropsis, Codium, Dictyosphaeria, Ernodesmis, H...
Descriptions of 13 green and 12 brown algal species from 20 genera and 15 families collected on Cabezo Reef of the National Park Sistema Arrecifal Veracruzano in the southwestern Gulf of México, which are new records for the reef, are given. The species belong to the chlorophyte genera Caulerpa, Cladophoropsis, Codium, Dictyosphaeria, Ernodesmis, H...
The main information on the state of knowledge of phytoplankton, microphytobenthos, macroalgae and seagrasses of the National Park Sistema Arrecifal Veracruzano is given based on published studies and investigations in progress conducted during 2005-2011 by the Universidad Veracruzana. For the first time, data on phytoplankton and microphytobenthos...
During the last two years, blooms caused by Karenia species in the southern Gulf of Mexico have increased in frequency. In the central part of the State of Veracruz, a mixed bloom of K. brevis and Karenia “Mexican hat” sp. was reported in 2010. Karenia species appeared in high abundances in the Progreso-Chicxulub
area (21°21.421’-21°22.466’N, 89°00...
A new combination Cyclotella marina (Tanimura, Nagumo et Kato) Aké-Castillo, Okolodkov et Ector comb. et stat. nov. is proposed for the diatom Cyclotella atomus var. marina Tanimura, Nagumo et Kato. This taxon is clearly distinguishable from C. atomus Hustedt by its smaller diameter and in lacking the valve-face fultoportula. Open chambers seem to...
