Biodiversidad de protistas (flagelados heterótrofos) en México

Estrada, Rosaura Mayén; Santos, Margarita Reyes; Aguilar, Maricela Elena Vicencio

doi:10.7550/rmb.32922

Cited by 3 publications

(4 citation statements)

References 17 publications

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“…The current and most complete list of protists includes a compilation of 197 families, 445 genera, and 1170 species of heterotrophic flagellates and ciliates recorded after more than one century of studies in Mexico [151]. Previously, 238 species of planktonic tintinnid ciliates have been recorded, chiefly in marine and brackish environments [74].…”

Section: Protistsmentioning

confidence: 99%

Freshwater Diversity of Zooplankton from Mexico: Historical Review of Some of the Main Groups

Cervantes-Martínez

Ramírez

Elías‐Gutiérrez

et al. 2023

Water

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In this review, we include rotifers, copepods, and cladocerans, including other groups not usually deemed as zooplankters: i.e., protists, acari, and large branchiopods. The objectives of this study were to integrate the dispersed literature on the taxonomy and diversity of these freshwater zooplankton groups and to explain (1) how these contributions can be arranged in distinct historical periods and (2) how this knowledge has allowed the detection of exotic and threatened species. We divided the freshwater zooplankton studies in Mexico into three historical periods: the first one comprised the 1840s to the 1940s when foreign researchers carried out most studies during several expeditions. Spanish researchers promoted surveys on different zooplankton taxa at the end of this first period. The second period, from the early 1950s to the end of the 1990s of the XX century, showed a remarkably increased research activity in its last ten years only (that is, during the 1990s to 2000), represented by contributions of a new generation of Mexican zooplanktologists. This period yielded more complete zooplankton listings and detailed morphological descriptions of rotifers, cladocerans, copepods, and large branchiopods. The third period started from the year 2000 to date. During this time, listings and online faunistic baselines based on integrative taxonomy have been the primary trend. An account of exotic zooplankters and conservation issues of several native species are discussed. The results of this review show that the knowledge of the freshwater zooplankton of this country has increased significantly over the last 40 years, with at least 408 first records of species for Mexico. Currently, the knowledge of Mexican freshwater zooplankton is among the most complete in the world. However, it is estimated that only a small fraction of the true diversity has been documented.

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Section: Protistsmentioning

confidence: 99%

Freshwater Diversity of Zooplankton from Mexico: Historical Review of Some of the Main Groups

Cervantes-Martínez

Ramírez

Elías‐Gutiérrez

et al. 2023

Water

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“…En los protistas se incluyen taxones como amebozoos, euglenozoos, ciliados y heliozoos, los cuales habitan en ambientes acuáticos, dulceacuícolas, marinos, hipersalinos o salobres, e interfaces como agua-suelo o agua-aire (Coleman et al, 1977;Foissner, 1987;Humphrey et al, 2008;Lynn 2012) y también son simbiontes de animales y plantas. La mayoría son heterótrofos, fagótrofos u osmótrofos, con movimiento por medio de pseudópodos, flagelos o cilios, carecen de pared celular y algunos euglenozoos presentan cloroplastos (Aladro-Lubel, 2009;Mayén-Estrada et al, 2014a, 2014b. Ecológicamente son un componente importante de las redes tróficas y del reciclamiento de nutrientes en los ecosistemas (Anderson, 1987;Fenchel, 1987;Laybourn-Parry, 1992;Arndt & Berninger, 1995), además de jugar un papel importante como principales consumidores de bacterias (Patterson, 2003).…”

Section: Introductionunclassified

“…Se estima que pueden existir aproximadamente 90,000 especies de protistas de vida libre en hábitats terrestres y acuáticos (Corliss, 2002;Brusca & Brusca, 2003;Foissner, 2007;Aladro-Lubel, 2009). Para los cuerpos de agua continentales de México existen pocos estudios sobre su diversidad, los cuales se han desarrollado principalmente en nueve cuerpos de agua, entre los cuales están Chapultepec y Xochimilco en la Ciudad de México, la laguna La Mancha en Veracruz y las lagunas de Zempoala en Morelos (López-Ochoterena, 2001;Mayén-Estrada et al, 2014a, 2014b. Esta escasez de estudios está ligada al también reducido número de investigadores en este campo en el país.…”

Section: Introductionunclassified

“…Esta escasez de estudios está ligada al también reducido número de investigadores en este campo en el país. En México se tienen registradas alrededor de 146 especies de protistas flagelados heterótrofos (Mayén-Estrada et al, 2014a), 995 especies de ciliados de vida libre (Mayén-Estrada et al, 2014b) y 315 especies de amebas de vida libre (Gallegos-Neyra et al, 2014). Para el Estado de Querétaro solo se han registrado 13 taxones de protistas (Sigala-Regalado et al, 2011).…”

Section: Introductionunclassified

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Richness of protists in El Cajón dam, Querétaro, Mexico: temporal and spatial approximation

2020

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Pese a que los protistas son componentes importantes en los ecosistemas y microhábitats acuáticos, en México su conocimiento es escaso, por lo que es relevante contribuir con estudios de su diversidad en el país. Objetivo: En este trabajo se documenta la diversidad de protistas y su variación espacial y temporal en una presa urbana en Querétaro, México. Métodos: Se realizaron muestreos superficiales cada semana durante un periodo anual de julio 2015 a julio 2016 en dos puntos de la presa, uno hacia su parte media y otro en su parte posterior. Se comparó la riqueza y la composición de los taxones, tanto espacial como temporalmente, así como la relación de las comunidades con la precipitación y la temperatura atmosférica, con ayuda de análisis de comparación de la riqueza de especies a una misma cobertura de muestra y de técnicas multivariadas. Resultados: Se determinó un total de 17 taxones pertenecientes a los phyla Amoebozoa, Euglenozoa, Ciliophora y Heliozoa. Se aportan 11 registros nuevos para el estado de Querétaro en un área representativa de las zonas semiáridas del centro del país. Las especies más frecuentes en los muestreos fueron Coleps hirtus, Paramecium caudatum y Stentor coeruleus. La composición de los taxones entre los puntos de muestreo fue diferente. Ambos puntos presentaron en el año dos picos de riqueza y dos comunidades diferentes, que correspondieron a las temporadas de lluvias en verano y de sequía en invierno. Conclusiones: La estacionalidad juega un papel importante para el desarrollo y establecimiento de las comunidades de protistas en la presa El Cajón.

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Implementing ITS1 metabarcoding for the analysis of soil microeukariotic diversity in the Mountain Cloud Forest

Rivera-Zizumbo,

Velez,

Ojeda

et al. 2024

J Soils Sediments

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Purpose In threatened diversity hotspots, such as mountain cloud forests, microbiome studies have focused essentially on bacteria. Unlike prokaryotic microbiomes, the study of the microeukaryotes has largely been restricted to the visual identification of specific groups. Herein, microeukaryotic edaphic diversity from a pristine mountain cloud forest (MCF) of Mexico was analyzed via the metabarcoding of the ITS1 region of ribosomal DNA. Materials and methods An exploratory triangular sampling was conducted in the mountain cloud forest located in El Relámpago Mount, Santiago Comaltepec, Oaxaca, Mexico. Each vertex was located adjacent to a dominant plant species in the ecosystem (Oreomunnea mexicana and Alsophila salvinii). After DNA extraction the ITS1 region (rDNA) was amplified. Microeukaryotic sequences were filtered by computational subtraction against the ITS2 Database. Next, alpha and beta diversity indexes were calculated, and the relationship between abiotic variables and diversity patterns were inferred by means of a Canonical Correspondence Analysis. Results Overall, 138 inferred sequence variants were identified, including 87 protists, 35 animals (microfauna), and 16 algae. Within the animals, the nematodes were the dominant group, chlorophytes dominated algae, and in Protista, no dominance patterns were observed given the high diversity and equitability of this group. Soil available carbon, carbon degrading enzymes and the pH play a key role in modeling the community structure. Remarkably, high beta diversity levels were obtained, evidencing a strong spatial heterogeneity at the small scale. Conclusions The ITS metabarcoding proved to be a useful tool to conduct multi-taxa diversity assessments for microeukaryotes, allowing the identification of alpha and beta diversity patterns and overcoming limitations of sampling and the direct observation of individuals. The results presented in this work evidenced high microeukaryotic diversity levels in the soil of MCF and encourage future studies aiming to explore the taxonomic diversity of individual taxa.

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Biodiversidad de protistas (flagelados heterótrofos) en México

Cited by 3 publications

References 17 publications

Freshwater Diversity of Zooplankton from Mexico: Historical Review of Some of the Main Groups

Freshwater Diversity of Zooplankton from Mexico: Historical Review of Some of the Main Groups

Richness of protists in El Cajón dam, Querétaro, Mexico: temporal and spatial approximation

Implementing ITS1 metabarcoding for the analysis of soil microeukariotic diversity in the Mountain Cloud Forest

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