Ileana Ortegon-AznarUniversidad Autónoma de Yucatán | UADY · Department of Botany
Ileana Ortegon-Aznar
PhD
Currently working at the project Biodiversity of Algae of Yucatan (BAY) Biodiversidad de Algas de Yucatán (BAY).
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29
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81
Citations
Citations since 2017
Introduction
Additional affiliations
July 2015 - July 2016
October 2003 - present
October 2003 - present
Publications
Publications (29)
This work reports the occurrence of the introduced alga Caulerpa ollivieri Dostál, 1929 in the Southern Gulf of Mexico off the northern coast
of the Yucatan Peninsula, Mexico. In 2010, a specimen was collected off the Dzilam de Bravo, and additional specimens were detected in at
least four localities along the coast. These records extend the distri...
No previous study has examined the large-scale distributional drivers of the entire global pool of 3,499 macrophyte species, despite the obvious importance of this for understanding the macro-ecology of these plants. To assess the hypothesis that natural rather than human-related transfer vectors act as the primary long-distance drivers of global m...
No previous study has examined the large-scale distributional drivers of the entire global pool of 3,499 macrophyte species, despite the obvious importance of this for understanding the macroecology of these plants. To assess the hypothesis that natural rather than human-related transfer vectors act as the primary long-distance drivers of global mo...
Digenea is a widely distributed genus in the Mexican Atlantic, and until a few years ago the only morphospecies D. simplex was recorded. Recent molecular research on this species from a locality in the Mexican Caribbean revealed the new species D. mexicana, whose morphological similarity with specimens from Gulf of Mexico suggests that its distribu...
Background. There are few studies of the effect of Sargassum sp. drift on coastal ecosystems. One of the most obvious changes is the increase in turbidity, however it has been only a few studies of how this is affecting seagrass communities and what changes they can induce in them that can indicate their impact in the ecosystem. Objectives. Determi...
Routine DNA barcoding with the chloroplast gene tufA identified novel records of an unknown and denuded (i.e. lacking branchlets) Caulerpa species previously reported from the Florida Middle Grounds. tufA barcoding not only confirmed the matching molecular identity of this taxon with several newly collected denuded specimens from shallow habitats o...
Una de las problemáticas ambientales actuales en la península de Yucatán es la arribazón excesiva de sargazo a las playas del Mar Caribe que, aunque inició desde 2011, tuvo un evento masivo en 2015 que incrementó en 2018 (Doyle y Franks 2015, Wang et al. 2019). Hasta la fecha, el sargazo sigue llegando por toneladas a las playas lo que ha impactado...
Introducción: Una de las problemáticas ambientales actuales en la península de Yucatán es la arribazón excesiva de sargazo a las playas del Mar Caribe que, aunque inició desde 2011, tuvo un evento masivo en 2015 que incrementó en 2018 (Doyle y Franks 2015, Wang et al. 2019). Hasta la fecha, el sargazo sigue llegando por toneladas a las playas lo qu...
Background:
There are few studies about Nemacystus on the Atlantic coast, and N. howei has been reported only once for Mexico; that record, however, did not provide a description of this species.
Question:
What are the morphological characteristics of Nemacystus howei and its distribution on the Yucatan coast?
Species study:
Macroalgae, Phaeophyc...
La contaminación de cuerpos de agua por derivados del petróleo ha sido alarmante en los últimos años, y los hidrocarburos son de las formas más comunes de contaminación en los sistemas acuíferos. Las comunidades vegetales han sido consideradas como biomonitores de contaminantes, por lo que se determinó la presencia de Hidrocarburos Aromáticos Polic...
to read it use the follow link http://rdcu.be/oGB8
Abstract:
Calcareous green algae (CGA) are important producers
of carbonaceous sediments in coastal environments;
they fix carbon producing CaCO3 and organic compounds
through photosynthesis contributing to the carbon budget of
these ecosystems. In this study, the CGA standing stock (as
dry weight)...
En los últimos 250 años han ocurrido cambios en el planeta, y uno de estos es el cambio climático provocado principalmente por el dióxido de carbono (CO2) atmosférico que ha aumentado en
casi un 40 %, pasando de los niveles preindustriales de unos 280 ppmv (partes por millón de volumen) a más de 400 ppmv (Bala 2013). Este aumento es derivado de la...
Se examinó la distribución estacional de las macroalgas marinas y las variables de los microhábitats (temperatura, salinidad, pH, oxígeno disuelto y tipo de sustrato) en dos [reas Naturales Protegidas de la costa Norte de la Península de Yucat{n, de noviembre de 2005 a julio de 2006. Se muestrearon seis estaciones en el Palmar y cuatro en Dzilam. S...
Los corales arrecifales en todo el mundo se están viendo afectados en parte por el cambio de fase alga-coral, es conocido que las algas compiten contra los corales por espacio y/o luz, sin embargo, el aumento de nutrientes y la reducción de herbívoros por la sobrepesca ha incrementado este cambio. El arrecife Alacranes es un Parque Nacional localiz...
fotogramas con el programa Pinnacle Studio V. 14. Posteriormente se identificó las especies y se realizó el listado de las species de algas presentes en la zona. Se utilizó el Programa ArcGis 9.3 para obtener el área de cada polígono o ambiente. Se encontró un total de 74 especies de macroalgas. En la imagen satelital se verificó el ensamble de alg...
fase coral-alga, este cambio permite que las algas desplacen la cobertura coralina. Se muestrearon tres zonas (norte, sur y centro) de la laguna arrecifal cercana de la cresta en la zona de Mahahual. Se hicieron dos transectos de 20 m paralelos a la costa en cada zona, y cinco cuadrantes de .0625 m 2 . La cobertura de algas epibiontes sobre los cor...
BIODIVERSIDAD 162 Definir las algas no es una tarea fácil pues se trata de un grupo que no tiene un ancestro común, de manera que se les ha agrupado en razón de las similitudes que presentan. Para definirlas utilizamos, entonces, características que unifi-can al grupo, tales como la de ser organismos autótrofos que realizan la fotosíntesis oxigénic...
Llamada también "hemotalasia" (del griego he-mos, hematos=sangre y thalasos=mar), la marea roja debe su nombre a la coloración del agua producida por el crecimiento masivo de organis-mos fitoplanctónicos durante ciertas épocas del año. Estos eventos, conocidos también como Florecimientos Algales Nocivos (FANs) (o HA-Bs "Harmful Algal Blooms," por s...
División / Orden / Familia / Nombre científico Arrecifes Lagunas Costa CLOROPHYTA Chaetosphaeridiales Chaetosphaeridiaceae Diplochaete solitaria F.S.Collins 1 0 0 Ulotrichales Gomontiaceae Gomontia polyrhiza (Lagerheim) Bornet & Flahault 1 0 0 Ulvales Ulvellaceae Acrochaete viridis (Reinke) R.Nielsen 1 0 0 Pringsheimiella scutata (Reinke) Marchewia...
List of algae of Yucatan
In book: Biodiversidad y Desarrollo Humano en Yucatán.
Ileana Ortegon-Aznar , Yolanda Freile y Robledo Ramírez Daniel. Chapter: 4 Algas. (Anexo 1 ) March 2010 in : Durán García Rafael, Martha Méndez González. Biodiversidad y Desarrollo Humano en Yucatán. First edition: CICY, PPD-FMAM, Conabio, Seduma
The abundance and distribution of marine algae was recorded for the first time in Madagascar Reef, a
site that may be part of the connection between the Caribbean and the Gulf of Mexico algal communities. The
objective of this study is to generate the base-line information on macroalgal functional forms (MFGs)
distribution and abundances that can s...
Se determinó un total de 46 taxa en la laguna costera de Ría Lagartos, que incluyeron ...
A total of 46 taxa were found in Río Lagartos coastal lagoon; 26 species of Rhodophyta, 18 Chlorophyta, and 2 Phaeophyta, from 21 collecting stations in June and November 1995. The Jaccard Index was used to analyze the similarity of the flora, using a presence-abscence matrix in space and time. A Multi Dimensional Scaling (MDS) and PCA (principal c...
The macroalgal communities of three lagoons of the yucatán peninsula (Celestun, Río lagartos and Nichupte) were compared with regard to species composition, distribution in the different habitats and as correlated with environmental gradients.
A total of 113 species ...
A total of 113 species was found in Puerto Morelos reef system at the sampling in April 1995. Phycological differences were found between rear reef and lagoon as Jaccard index accoents for the 28% of similarity between both hábitats. It is evident that both hábitats have different general conditions such s sustrate and wáter motion, and they migth...
This paper presents the fi rst phycofl oristic study carried out on the coastal lagoon of Che- lem, Yucatan, Mexico. Eight sampling sites at three different seasons (dry, rainy and Nor- tes) allowed us to record 54 taxa of marine algae (35 species of Rhodophyceae, 18 Chloro- phyceae and one Phaeophyceae), registered for the fi rst time in this area...
Projects
Projects (4)
For the Yucatan peninsula the latest study about the number of algal species shown data by states, of the Yucatan peninsula (Quintana Roo, Campeche and Yucatan), given to Quintana Roo 453 sp. (Pedroche y Sentíes 2003b) Campeche 211 sp (Mateo-Cid et al 2013), and to Yucatan a total of 285 sp (Ortegon-Aznar, et al 2010).
For the Northern coast of Yucatan in 1993 a total of 214 sp (91 sp of Rhodophyta, 48 Phaophyceae and 75 Chlorophyta) was reported (Pedroche etal 1993); for 2003 a total of 283 sp, (120 Rhodophyta, 53 Phaeophyceae and 110 to Chlorophyta) have been reported (Pedroche y Sentíes 2003b). In 2010 a review of the algae reported to Yucatan was done, and gives a similar amount of algae reported before, (285 sp) but there is a difference between the composition of the algae, this is, 130 belong to Rhodophyta, 50 to Phaeophyceae and 105 to Chlorophyta (Ortegón-Aznar et al. 2010).
At that time, and only for the North coast Yucatan, about 20 bibliographical sources were consulted (Ortegón-Aznar et al. 2010), now this number has increased by approximately the double, this gives us some idea of the increase of the diversity knowledge in terms of species richness. We think that an update is needed, but not just a review of publications, but a review of herbarium collections, and field work that input specimens in the herbariums, that are actually buried and have not been published. For this reason the objective of this project is to update and the increase the knowledge of the diversity of macroalgae to integrate the Phycological Flora of Yucatan in terms of species richness and add the new records that have not been published in other works before. Also an analisys of the geographical distribution of the benthic marine algae off the Northern Coast of the Yucatan peninsula was going to be perform.
Determinar la producción de carbono y su proporción en orgánico e inorgánico (CaCO3) de las algas verdes calcáreas en Yucatán, México y determinar su función en la captura de carbono y como productoras de sedimento-
