scholarly journals PROSPECTIVE FLORISTICS OF EPIPHYTIC DIATOMS ON RHODOPHYTA FROM THE SOUTHERN GULF OF MEXICO

2017 ◽  
Vol 32 (2) ◽  
pp. 35
Author(s):  
David Alfaro Siqueiros Beltrones ◽  
Yuriko Joscelin Martínez - Hernández
Keyword(s):  
Species Richness ◽  
Gulf Of Mexico ◽  
Species Composition ◽  
Light Microscopy ◽  
Red Algae ◽  
New Records ◽  
Similarity Measurement ◽  
Diatom Assemblages ◽  
Epiphytic Diatoms ◽  
Southern Gulf Of Mexico

Studies on epiphytic diatoms can be considered somewhat lacking worldwide, mainly because of the enormous scientific research potential around them, and there is still much to do concerning floristics alone. Particularly for the Mexican coasts, mainly in the southern Gulf of Mexico. Thus, our objective was to determine the epiphytic diatom floristics for several species of Rhodophyta from the coast of Veracruz state (México). Diatoms sampled from specimens of six taxa of Rhodophyta were observed in permanent mountings, under light microscopy. A total 115 diatom taxa were identified, that support our expectancy of a potential species richness much higher on red algae hosts. A presence absence similarity measurement suggested that a single diatom assemblage was hosted in the six red algae taxa. The species composition is highly similar to epiphytic diatom assemblages from NW Mexico, albeit six taxa are new records for Mexican littorals. A photographic catalog of the identified epiphytic diatoms is provided.Florística prospectiva de diatomeas epifitas sobre Rhodophyta en el Sur del Golfo de México Los estudios sobre diatomeas epifitas a nivel global se pueden considerar escasos, principalmente por el gran potencial científico que representan. Una consecuencia de ello es lo mucho que falta por hacer tan solo en florística a lo largo de las costas mexicanas, particularmente al sur del Golfo de México. Así, el objetivo de nuestro estudio fue determinar la florística de diatomeas epifitas en varias especies de Rhodophyta de la costa del Estado de Veracruz, México. Se identificaron diatomeas epifitas en talos de seis taxa en preparaciones permanentes bajo microscopía de luz. La lista florística de diatomeas redituó 115 taxa, lo que respalda nuestra expectativa de una riqueza de especies potencial mucho mayor en Rhodophyta hospederos. La similitud (Bray-Curtis) con base en presencia/ausencia de taxa sugiere que una sola asociación de diatomeas epifitas se distribuye entre los seis taxa de algas rojas hospederos. La composición de especies es muy similar a la de asociaciones de diatomeas epifitas del NW de México, aunque seis taxa son nuevos registros para litorales mexicanos. Se incluye un catálogo fotográfico de los taxa de diatomeas epifitas identificadas.

scholarly journals FLORÍSTICA DE DIATOMEAS EPIFITAS EN UN MANCHÓN DE MACROALGAS SUBTROPICALES

2006 ◽  
Vol 21 (1-2) ◽  
pp. 11
Author(s):  
D. A. Siqueiros Beltrones ◽  
O. U. Hernández Almeida
Keyword(s):  
Species Richness ◽  
Species Composition ◽  
New Records ◽  
Diatom Assemblages ◽  
Epiphytic Diatoms

Se determinó la composición de especies de diatomeas epifitas en macroalgas de distintos taxa en una zona subtropical. Para ello, en un manchón ubicado en la playa Punta Roca Caimancito, B. C. S., se tomaron muestras de las macroalgas sobresalientes, en junio y diciembre de 2001, y abril, mayo y julio del 2002. Se identificaron 13 especies de macroalgas, de las cuales: Hydroclathrus clathrathus, Laurencia pacifica, L. johnstonii, Padina mexicana, P. caulescens y Codium spp. fueron las más conspicuas. El examen de la flora epifítica redituó 278 taxa de diatomeas, que es la máxima riqueza registrada para este tipo de sustrato, y de los cuales 44 son nuevos registros para la región. De los 75 géneros reconocidos de diatomeas, los mejor representados fueron: Mastogloia (25 especies), Amphora (23), Navicula (23), Nitzschia (22), Cocconeis (22), Lyrella (12) y Achnanthes (11). Los taxa más abundantes fueron Cocconeis disculus y C. dirupta. El número de taxa de diatomeas por especie hospedera también fue alto y varió entre 89 ( Codium spp.) y 143 ( L. pacifica), aunque las diferencias podrían deberse al número de especímenes procesados por especie de macroalga. Floristics of epiphytic diatoms in a patch of subtropical macroalgae The species composition of epiphytic diatom assemblages found on different taxa of subtropical macroalgae was determined. Samplings were carried out in a macroalgae bed located in Punta Roca Caimancito beach, B. C. S. in june and december 2001, and on april, may and july 2002, collecting the most frequent macroalgae taxa. The most conspicuous out of twelve macroalgae taxa were: Hydroclathrus clathrathus, Laurencia pacifica, L. johnstonii, Padina mexicana and P. caulescens. A total of 278 diatom taxa were recorded. This is the largest species richness recorded for this type of substrate, and out of which 44 are new records for the region. Out of 75 genera recognized the best represented were: Mastogloia (25 species), Amphora (23), Navicula (23), Nitzschia (22), Cocconeis (22), Lyrella (12) and Achnanthes (11). The most abundant taxa were Cocconeis disculus and C. dirupta. The number of diatom taxa per macroalgae species was also high, ranging from 89 (Codium spp.) to 143 (L. pacifica). Albeit, this difference could be attributed to the number of specimens collected per macroalga species.

scholarly journals Range expansion of two box jellyfish (Cnidaria, Cubozoa) in southern Gulf of Mexico

Check List ◽  
2019 ◽  
Vol 15 (3) ◽  
pp. 405-410 ◽  
Author(s):  
José María Ahuatzin Hernández ◽  
Andrea del Jesus Couoh-Concha ◽  
Lucio Loman-Ramos ◽  
Lorena Violeta Leon-Deniz
Keyword(s):  
Gulf Of Mexico ◽  
Range Expansion ◽  
New Records ◽  
Coastal Lagoons ◽  
Box Jellyfish ◽  
Southern Gulf Of Mexico

We report range extensions of Chiropsalmus quadrumanus (Müller, 1859) and Tripedalia cystophora Conant, 1897 to 2 coastal lagoons in the southern Gulf of Mexico. These new records are the first for these species in Yucatán and Mexico.

scholarly journals New records of subtidal benthic marine algae from the state of Veracruz, southern Gulf of Mexico

2019 ◽  
Vol 90 (0) ◽  
Author(s):  
José Luis Godínez-Ortega ◽  
Pedro Ramírez-García ◽  
Alejandro Granados-Barba ◽  
Michael J. Wynne
Keyword(s):  
Gulf Of Mexico ◽  
Marine Algae ◽  
New Records ◽  
The State ◽  
Southern Gulf Of Mexico

An update on the diversity of marine sponges in the southern gulf of Mexico coral reefs

Zootaxa ◽  
2021 ◽  
Vol 5031 (1) ◽  
pp. 1-112
Author(s):  
DIANA UGALDE ◽  
JULIO C.C. FERNANDEZ ◽  
PATRICIA GÓMEZ ◽  
GISELE LÔBO-HAJDU ◽  
NUNO SIMÕES
Keyword(s):  
Coral Reef ◽  
Coral Reefs ◽  
Gulf Of Mexico ◽  
New Records ◽  
Marine Sponges ◽  
Sponge Species ◽  
Southern Gulf Of Mexico

Until now, 127 species of marine sponges have been recorded in the southern Gulf of Mexico (SGoM). In this study, we describe the sponge fauna recorded on 16 coral reefs of the SGoM, defined as the Mexican waters of the Gulf of Mexico (GoM), during a period from 2005 to 2019. We report 80 sponge species, including 34 first geographic records for the southern GoM region. The latter are fully described and illustrated, taking into account 24 that represent new records for the GoM: Agelas conifera, Agelas sventres, Agelas wiedenmayeri, Prosuberites carriebowensis, Desmanthus meandroides, Cliona aprica, Cliona dioryssa, Placospongia ruetzleri, Haliclona (Gellius) megasclera, Haliclona (Reniera) aff. portroyalensis, Neopetrosia proxima, Xestospongia arenosa, Calyx podatypa, Shiphonodictyon xamaycaense, Acarnus innominatus, Iotrochota arenosa, Polymastia tenax, Svenzea cristinae, Svenzea flava, Svenzea tubulosa, Svenzea zeai, Timea stenosclera, Stellettinopsis megastylifera, Suberea flavolivescens. The present work highlights the understimated and remarkable diversity of reef-associated sponges within the Campeche Bank Coral reef systems. Present work data was compiled with existing published information to produce an updated list of 161 known sponges in the southern GoM.  

scholarly journals Diversity of mangrove root-dwelling sponges in a tropical coastal ecosystem in the southern Gulf of Mexico region

2020 ◽  
Vol 74 (1) ◽  
Author(s):  
Pedro de Jesús Castellanos-Pérez ◽  
Laura Elena Vázquez-Maldonado ◽  
Enrique Ávila ◽  
José Antonio Cruz-Barraza ◽  
Julio César Canales-Delgadillo
Keyword(s):  
Gulf Of Mexico ◽  
New Records ◽  
Coastal Ecosystem ◽  
High Productivity ◽  
Mangrove Root ◽  
Red Mangrove ◽  
Reef Environments ◽  
Southern Gulf Of Mexico ◽  
The Caribbean ◽  
Central Atlantic

AbstractSponges are one of the most conspicuous groups of epibionts in mangrove prop root habitats. However, with the exception of the Caribbean and the Indo-Pacific regions, studies focused on species diversity are lacking in other locations that have high mangrove coverage and are relatively distant from coral reef environments. Because mangrove-root epibiont communities, in general, have been understudied worldwide, this research contributes to filling this knowledge gap. In this study, a total of 30 sponge species (belonging to three subclasses, 14 families and 19 genera) were recorded as epibionts on prop roots of the red mangrove Rhizophora mangle in a tropical coastal ecosystem of the Southern Gulf of Mexico. Of these, five were new records for the Gulf of Mexico, 14 were new for the Mexican coasts of the gulf and 25 were new for the study area. Moreover, a similarity analysis based on presence/absence data of mangrove-associated sponges reported throughout the Western Central Atlantic region revealed that the sponge assemblage from the study area was more similar to those documented in most of the Caribbean locations (Jamaica, Cuba, Martinique, Panama, Venezuela, Belize and Colombia) rather than with those of the Northeast of the Gulf of Mexico, Guadeloupe and Trinidad. This relative intra-regional dissimilarity in the structure of mangrove-associated sponge assemblages may be related to differences in environmental conditions as well as taxonomic effort. The study area, unlike most of the Caribbean locations, is characterized by estuarine conditions and high productivity throughout the year. The inter-site variability recorded in the composition of mangrove-associated sponges was influenced by a set of factors such as salinity, dissolved oxygen and hydrodynamism. This study shows the importance of exploring the mangrove-associated sponge assemblages from different regions of the world as it furthers knowledge of the biodiversity and global distribution of this group.

Free-living marine planktonic unarmoured dinoflagellates from the Gulf of Mexico and the Mexican Pacific

2015 ◽  
Vol 58 (1) ◽  
Author(s):  
Sergio Escobar-Morales ◽  
David U. Hernández-Becerril
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Gulf Of Mexico ◽  
Species Composition ◽  
New Records ◽  
Morphological Characters ◽  
Phylogenetic Group ◽  
Free Living ◽  
Mexican Pacific ◽  
Scanning Electron

AbstractThe so-called unarmoured dinoflagellates are not a “natural” (phylogenetic) group but they lack thecal plates, share fragility and possess relatively few morphological characters that can be positively identified. This study depicts the species composition of unarmoured dinoflagellates collected from sites along the coasts of the Gulf of Mexico and the Mexican Pacific and includes their descriptions and illustrations. We identified a total of 25 species belonging to 13 genera and six families that were studied through various techniques using light and scanning electron microscopy. Seven new records for the Mexican Pacific are annotated here that include

New records of alpheid shrimps (Crustacea: Decapoda: Alpheidae) from the southern Gulf of Mexico

2014 ◽  
Vol 7 ◽  
Author(s):  
Julio Duarte ◽  
Margarita Hermoso-Salazar ◽  
Arthur Anker ◽  
Nuno Simões
Keyword(s):  
Gulf Of Mexico ◽  
New Records ◽  
Southern Gulf Of Mexico

Reef fishes of the Mazunte-Bahías de Huatulco reef track, Oaxaca, Mexican Pacific

Zootaxa ◽  
2010 ◽  
Vol 2422 (1) ◽  
pp. 53 ◽  
Author(s):  
RAMÓN ANDRÉS LÓPEZ PÉREZ ◽  
IMELDA LÓPEZ PÉREZ-MALDONADO ◽  
ARIADNA MONTSERRAT LÓPEZ ORTIZ ◽  
LINDA MARGARITA BARRANCO SERVIN ◽  
JAVIER BARRIENTOS VILLALOBOS ◽  
...  
Keyword(s):  
Species Richness ◽  
Species Composition ◽  
New Records ◽  
Reef Fishes ◽  
Visual Census ◽  
Mexican Pacific ◽  
Reef Communities ◽  
Census Techniques

Although fish are one of the most abundant, conspicuous and structurally important inhabitants of reef systems, the group has remained largely ignored from biodiversity accounts on the Oaxaca reef track. Reef icthyofauna composition at 10 sites between Mazunte and Isla Montosa was gathered through stationary visual census techniques during 19982008. A total of 112 species belonging to 81 genera, 40 families and 11 orders were recorded. Species richness of the study area is higher than similar reef communities in the Mexican Pacific. Thirty species represent new records for the study area, and some discrepancies were found between local (this study) and regional accounts. Our data suggest that species composition in the area is still incomplete.

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