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181 resultados encontrados para: TEMA: Zooplancton
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1.
Artículo
Una nueva especie de halicyclops (Copepoda, cyclopoida, halicyclopinae) de un sistema estuarino de la costa caribe de Colombia
Fuentes Reinés, Juan Manuel (autor) ; Suárez Morales, Eduardo (autor) ;
Contenido en: Acta Biologica Colombiana Vol. 25, no. 1 (January-April 2020), p. 14-21 ISSN: 1900-1649
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Resumen en: Español | Inglés |
Resumen en español

Muestras de plancton obtenidas de la Ciénaga Grande de Santa Marta, un extenso sistema estuarino en el norte de Colombia, produjeron especímenes machos y hembras de una especie no descrita del género Halicyclops. Los copépodos de la familia Cyclopidae son dominantes en los hábitats de agua dulce y transicionales. Los miembros de la subfamilia Halicyclopinae son predominantemente de hábitats salobres, con algunas especies de agua dulce. La nueva especie aquí descrita es asignable al grupo de especies denominado “F” de Halicyclops (sensu Pesce, 2018) con una fórmula de espinas exopodales (P1–4) = 2333. Actualmente, este grupo contiene cinco especies y una subespecie. Halicyclops gutierrezi sp. n. puede distinguirse de sus congéneres conocidos por la ausencia de un verdadero opérculo anal, la longitud relativa de las setas de la P5 de la hembra y del macho, la longitud relativa de las setas internas de P4EXP3 y por detalles de la anténula del macho. Esta es la quinta especie de Halicyclops registrada en Colombia y la primera del grupo “F” de Halicyclops descrita en la cuenca del Caribe. Con la adición de H. gutierrezi sp. n., aumentó a 20 el número de especies del género que se conocen en la región Neotropical. Se proporciona una clave para la identificación de las especies del género registradas en Colombia.

Resumen en inglés

Plankton samples obtained from the Ciénaga Grande de Santa Marta, an extensive estuarine system in northern Colombia, yielded adult male and female specimens of an undescribed halicyclopine cyclopid copepod of the genus Halicyclops. Cyclopid copepods are frequently found in freshwater and transitional habitats. Members of the subfamily Halicyclopinae are chiefly brackish water forms with a few freshwater species. The new species described herein is assignable to the group of species “F” of Halicyclops (sensu Pesce, 2018) with a 2333 exopodal spine formula. Currently, this group contains five species and one subspecies. Halicyclops gutierrezi sp. n. can be distinguished from its known congeners by the absence of an anal operculum, the relative length of setae of the female and male P5, the relative length of the inner setae of P4EXP3, and details of the male antennule. This is the fifth species of Halicyclops recorded from Colombia and the first one of Halicyclops group “F” described from the Caribbean region. With the addition of H. gutierrezi sp. n., the number of species of the genus known from the Neotropics increased to 20. A key to the species of the genus recorded in Colombia is also provided.


2.
Artículo
*Solicítelo con su bibliotecario/a
Seasonal variability of stable isotope values and niche size in tropical calanoid copepods and zooplankton size fractions
Kozak, Eva Rose (autora) ; Franco Gordo, María del Carmen (autora) ; Godínez Domínguez, Enrique (autor) ; Suárez Morales, Eduardo (autor) ; Ambriz Arreola, Israel (autor) ;
Contenido en: Marine Biology Vol. 167, no. 3, article number 37 (March 2020), p. 1-13 ISSN: 1432-1793
Nota: Solicítelo con su bibliotecario/a
Resumen en: Inglés |
Resumen en inglés

The seasonal variability of stable isotope values (δ15N and δ¹³C), ∆15N values, and niche width of calanoid copepod species, three zooplankton size fractions and seston were assessed from samples obtained monthly between January and December 2012 at a coastal sampling site in the Eastern Tropical Pacific off Mexico (19°09′03′′ N, 104°44′50′′ W). Twenty calanoid copepod species were analyzed, 15 of which were sampled in both the cool, productive ‘mixed’ period and the warm, oligotrophic ‘stratified’ period. While copepod δ15N and ∆15N values were higher during the mixed period, seston δ15N values did not differ between periods. The δ¹³C values indicated a seasonal difference between a priori-defined groups of oceanic and coastal copepod species. The seasonal variations of both the isotopic niche (Bayesian ellipses) values and Layman metrics in tropical copepods and zooplankton fractions suggested an opportunistic feeding strategy responding to the local coupled physical–biological seasonal processes. During the productive mixed period, the trophic web was more robust and stable, and a wider niche was observed. Contrary to commonly reported responses to environmental conditions, we found a more complex mesozooplankton food web during the productive period and a shorter web during the oligotrophic period, highlighting the importance of researching trophic dynamics in coastal tropical ecosystems.


3.
Artículo
Water mite diversity (Acariformes: Prostigmata: Parasitengonina: Hydrachnidiae) from karst ecosystems in southern of Mexico: a barcoding approach
Montes Ortiz, Lucia (autora) ; Elías Gutiérrez, Manuel (autor) ;
Disponible en línea
Contenido en: Diversity Volumen 12, número 9, 329 (August 2020), p. 1-16 ISSN: 1424-2818
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Resumen en: Inglés |
Resumen en inglés

Water mites represent the most diverse and abundant group of Arachnida in freshwater ecosystems, with about 6000 species described; however, it is estimated that this number represents only 30% of the total expected species. Despite having strong biotic interactions with their community and having the potential to be exceptional bioindicators, they are frequently excluded from studies of water quality or ecology, due to actual and perceived difficulties of taxonomic identification in this group. The objective of this study is to use the variations in the sequences of the mitochondrial cytochrome oxidase subunit I (COI), also known as the DNA barcodes region, as a tool to assess the diversity of water mites at 24 sites in the Yucatan Peninsula of Mexico. We found 77 genetic groups or putative species corresponding to 18 genera: Arrenurus, Atractides, Centrolimnesia, Eylais, Geayia, Hydrodroma, Hydryphantes, Hygrobates, Koenikea, Krendowskia, Limnesia, Limnochares, Mamersellides, Mideopsis, Neumania, Piona, Torrenticola, and Unionicola. This was significant, since there are only 35 species described for this region. Furthermore, this molecular information has allowed us to infer that there are characteristic assemblies per site. These data will facilitate the incorporation of water mites in different studies while the curatorial work continues to assign a Linnaean name.


4.
- Artículo con arbitraje
Faunistic survey of the zooplankton community in an oligotrophic sinkhole, Cenote Azul (Quintana Roo, Mexico), using different sampling methods, and documented with DNA barcodes
Montes Ortiz, Lucia (autora) ; Elías Gutiérrez, Manuel (autor) ;
Disponible en línea
Contenido en: Journal of Limnology Vol. 77, no. 3 (Jun 2018 ), p. 428-440 ISSN: 1129-5767
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Resumen en: Inglés |
Resumen en inglés

This study is the first faunistic inventory of a zooplankton community from an open, karstic and oligotrophic aquatic sinkhole in the south of the Yucatan Peninsula (Mexico), we describe the richness of the zooplankton collected with the combination of plankton nets and light traps of our own design, using morphological and molecular characters to identify the species and demonstrate the effectiveness of only one set of primers to sequence all taxa. Recently, it has been demonstrated that different sampling methods can increase the number of zooplankton species from tropical and temperate systems dramatically. These more effective methods together with DNA barcoding can give a new and more realistic picture of the species dwelling in a freshwater system. In total, we sequenced 268 specimens, and the list of species known in this sinkhole increased from 13 to 77 taxa, with a projection of 87 in total, including cladocerans, copepods, ostracods, fish larvae, tadpoles, rotifers, chironomids, water mites, among others. From the 77 taxa identified by us, 72 BINS (Barcode Index Numbers, equivalent to putative species) were assigned by the BOLD Database (boldsystems.org), and 30 of them are new records for both, BOLD and GenBank (www.ncbi.nlm.nih.gov). There was an essential difference in the number of taxa collected with the plankton nets and the light traps. Only 23 taxa were registered in the nets, representing between 28 and 29% of the total richness, while 67 were present in the light traps representing 87% of the species found. From these, 46 taxa were exclusive to this sampling method. Light traps are an effective method for rapid evaluation of zooplankton.

In the future, combining DNA barcoding and high-throughput sequencing methods with more efficient collecting will enable us to perform quick and precise biomonitoring of any aquatic ecosystem, enabling the detection of changes in zooplankton composition resulting from climate change and anthropogenic disturbances. Nevertheless, as a first step it is fundamental to establish a baseline of DNA barcodes for the species in these ecosystems.


5.
- Libro con arbitraje
Freshwater copepods (Calanoida, Cyclopoida and Harpacticoida) from the Chihuahuan Desert / Martha Angélica Gutiérrez-Aguirre, Eduardo Suárez-Morales, Adrián Cervantes-Martínez, Elizabeth J. Walsh
Gutiérrez Aguirre, Martha Angélica (autora) ; Suárez Morales, Eduardo (autor) ; Cervantes Martínez, Adrián (autor) ; Walsh, Elizabeth J. (autora) ;
Estado de México, México : Clave Editorial , c2019
Clasificación: EE/595.34097216 / F7
Bibliotecas: Campeche , San Cristóbal , Tapachula
Cerrar
SIBE Campeche
ECO040007056 (Disponible)
Disponibles para prestamo: 1
Cerrar
SIBE San Cristóbal
ECO010019842 (Disponible)
Disponibles para prestamo: 1
Cerrar
SIBE Tapachula
ECO020010989 (Disponible)
Disponibles para prestamo: 1
Índice | Resumen en: Inglés |
Resumen en inglés

This document is the result of collaborative work among colleagues from different institutions in Mexico (Universidad de Quintana Roo, Cozumel and El Colegio de la Frontera Sur, Chetumal) and the United States (University of Texcas, El Paso). This work presents the taxonomy, morphology and distribution of the free-living, freshwater copepods that inhabit ephemeral aquatic habitats in one binational reserve known as the Chihuahuan Desert. This desertic zone is part of the large North American biogeographic region called Altiplano Mexicano, which is shared by Mexico and the United States. A joing effort was made to synthesize findings about the diversity of the copepods than inhabit this peculiar geographic area, where aquatic systems are scarce and ephemeral. It includes a taxonomic and morphological assessment of 33 copepod species and contains over forty individual drawings, and 37 plates of photographs of Scanning Electron Microscopy (SEM).

Índice

Akcnowledgments
Preface
Chapter 1. Introduction and Anatomical terminology in Copepoda
References
Chapter 2. Species of Copepoda (Calanoida, Cyclopoida, Harpacticoida) from the Chihuahuan Desert
References
Chapter 3. Geographic distribution of the freshwater copepods from the Chihuahuan Desert
References


6.
- Artículo con arbitraje
PDF
Resumen en: Español | Inglés |
Resumen en español

Los cuerpos de agua kársticos representan la característica limnológica más relevante en la península de Yucatán, México. Estos sistemas albergan especies endémicas y son la principal fuente regional epigea de agua dulce. En este trabajo se estudian la morfometría, las propiedades limnológicas básicas, así como el zooplancton y la fauna de peces en cinco sistemas acuáticos kársticos de la zona centro del estado de Quintana Roo, México (en el corazón de la zona maya). Se trató de establecer la relación entre la riqueza de especies y las propiedades morfométricas. En general se encontraron 79 especies, 64 corresponden a zooplancton y 15 a necton. Todos los sistemas estudiados son oligotróficos de alta transparencia con bajas concentraciones de nutrientes y clorofila a diferenciándose así de otros cuerpos de agua en el centro de México. Los dos sistemas kársticos estudiados fueron los cenotes y las aguadas. Ambos mostraron diferencias en las variables biológicas, físicas y químicas. Una prueba ANOVA unidireccional demostró diferencias significativas en nutrientes (nitratos, F = 61.52, p<0.001; nitritos, F=7.361, p<0.001) y conductividad (F = 497.491, p<0.001) entre los sistemas. Un análisis simple de concordancia de grupos mostró diferencias en riqueza de especies y composición de la comunidad entre los dos sistemas acuáticos. En contraste con resultados previos encontrados en el centro y sureste de México, no se encontró correlación entre riqueza de especies y parámetros morfométricos (desarrollo del área y litoral). Se conoce poco de los sistemas acuáticos kársticos de la región surcentro de la Península de Yucatán (física, química y biológicamente). De hecho, este es el primer intento por estudiar la limnología y la relación riqueza de especies y variables morfométricas de los cenotes de la región.

Resumen en inglés

Karstic water bodies represent the most relevant limnologic feature of the Yucatan Peninsula, Mexico. These systems harbor endemic species and are the main regional epigean source of freshwater. In this work, the morphometry, basic limnological features, and the zooplankton and fish fauna of five aquatic karstic systems from the central zone of Quintana Roo State, Mexico (in the heart of the Zona Maya) were surveyed. The possible relation between species richness and morphometric features was tried to be established. Overall, 79 taxa were found, 64 belong to zooplankton, and 15 to nekton. All studied systems were oligotrophic, with high transparency, and low nutrients and chlorophyll a concentration, thus differing from other water bodies in central Mexico. The two different types of karstic systems studied were the typical “cenote”, and the “aguada”. Both showed differences in biological, physical, and chemical variables. A one-way ANOVA test demonstrated significative differences in nutrients (nitrates, F = 61.52, p<0.001; nitrites, F=7.361, p<0.001) and conductivity (F = 497.491, p<0.001) among systems. A simple concordance cluster analysis showed that species richness and community composition were also different between these two types of aquatic systems. In contrast to previous results found in central and southeastern Mexico, no correlation between species richness and morphometric parameters (area and shoreline development) were found. In the south-central region of the Yucatan Peninsula, the aquatic karstic systems are poorly known (physically, chemically and biologically). In fact, this is the first approach to understand the limnology and the relation between species richness and morphometric variables of the sinkholes from the region.


7.
- Artículo con arbitraje
Clave dicotómica para la identificación de Apendicularias en el Pacífico Tropical Oriental y mares interamericanos, con un listado de especies para Costa Rica
Corrales Ugalde, Marco ; Castellanos Osorio, Iván Arturo (coaut.) ; Morales Ramírez, Álvaro (coaut.) ;
Contenido en: Revista de Biología Tropical Supl. 1, Vol. 66, no. 2 (April 2018), p. S108-S122 ISSN: 0034-7744
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Resumen en: Español | Inglés |
Resumen en español

A pesar de que las apendicularias son consumidores primarios relevantes en las comunidades planctónicas, existe poca información detallada sobre las especies presentes en distintas regiones oceánicas. Por lo tanto, las guías regionales de identificación son importantes para desarrollar bases de datos con alta resolución taxonómica. En este trabajo, identificamos las especies de apendicularias presentes en 33 muestras epipelágicas de zooplancton recolectadas en varias localidades dentro de aguas costarricenses. 18 especies de apendicularias fueron identificadas, de las cuales 15 fueron recolectadas en el Pacífico y solo tres fueron recolectadas en el Caribe. Siete especies son registros nuevos para el Pacífico costarricense (Appendicularia sicula, Fritillaria charybdae, F. cf. pacifica, F. tenella, F. pellucida f. omani, Oikopleura fusiformis f. cornutogastra y Pelagopleura verticalis). Presentamos datos sobre la distribución en Costa Rica de cada especie, junto con una clave dicotómica para todas las especies reportadas previamente para los mares Interamericanos y el Pacífico Tropical Oriental.

Resumen en inglés

Although appendicularians are relevant primary consumers and are part of every zooplankton community, there is a lack of information on the species present in different ocean regions. Thus, regional identification guides are useful to develop datasets with high taxonomic resolution. Appendicularian species were identified in 33 epipelagic samples of zooplankton collected in several locations of Costarican waters. Eighteen appendicularian species were identified, of which 15 were found in the Pacific and only three in the Caribbean. Seven species are new records for Costa Rican Pacific waters (Appendicularia sicula, Fritillaria charybdae, F. cf. pacifica, F. tenella, F. pellucida f. omani, Oikoipleura fusiformis f. cornutogastra and Pelagopleura verticalis). Data for each species distribution in Costa Rica is presented together with a key for the identification of appendicularian species recorded in the Inter-American seas and the Eastern Tropical Pacific.


8.
- Artículo con arbitraje
Estado actual del conocimiento de la diversidad del zooplancton (invertebrados) de agua dulce de la Península de Yucatán, utilizando la taxonomía integrativa
Elías Gutiérrez, Manuel (autor) ; Montes Ortiz, Lucía (autora) ;
Disponible en línea
Contenido en: Teoría y Praxis No. 25 (mayo-agosto 2018), p. 31-48 ISSN: 1870 1582
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Resumen en: Español | Inglés |
Resumen en español

Tradicionalmente se ha considerado que solo tres grupos se encuentran presentes en el zooplancton de agua dulce: rotíferos, cladóceros y copépodos. Sin embargo, existen muchos grupos más que potencialmente son parte de esta comunidad. En este documento se incluyen en el zooplancton a todos los invertebrados capaces de nadar e introducirse en una trampa de luz, lo que ampliará el universo de grupos estudiados. Por otro lado, la taxonomía integrativa involucra el uso de caracteres morfológicos, moleculares, geográficos, etc., para el reconocimiento de las especies. En este contexto, se incluirá a los zoopláncteres estudiados con métodos tradicionales y códigos de barras de la vida recolectados en la Península de Yucatán. Hasta el momento se han estudiado 1 768 ejemplares de 69 localidades incluyendo rotíferos, moluscos, colémbolos, ácaros acuáticos, cladóceros, ostrácodos, copépodos, malacostracos y quironómidos, comprendidos en 52 familias, 70 géneros y 132 especies. El estado curatorial de los especímenes hasta el nivel de especie es incompleto, por lo que el número total se incrementa hasta 205 posibles especies representadas por los índices de códigos de barras (BIN). La labor ha sido compleja, pues hay especies que pudieran ser nuevas para la ciencia o ampliaciones de ámbito.

Por otro lado, también se han detectado formas extremas de una misma especie, como ocurrió con Bosmina tubicen, dentro del área de estudio, pudiéndose confundir fácilmente con B. huaronensis. Sin embargo, los códigos de barras indican una sola especie. Del mismo modo, especies morfológicamente muy similares pueden ser diferentes, como sucede con algunos ostrácodos. En conclusión, a pesar del avance logrado, es necesario continuar este trabajo, pues la comunidad de zooplancton puede ser un fuerte indicador de alteraciones antropogénicas en lugares todavía considerados prístinos, como la Laguna de Bacalar y la gran cantidad de cenotes que actualmente son atracciones turísticas.

Resumen en inglés

Traditionally it has been considered that only three groups are present in freshwater zooplankton: rotifers, cladocerans and copepods. However, there are many more groups that are potentially part of this community. In this document, all invertebrates capable of swimming and entering in a trap of light are included as zooplankton, which will expand the universe of groups studied. On the other hand, the integrative taxonomy involves the use of different characters morphological, molecular, geographical, etcetera for the recognition of the species. In this context, we will include zooplankters studied using traditional methods and dna barcodes collected in the Yucatan Peninsula. So far, 1 768 specimens of 69 localities have been studied, including rotifers, mollusks, collembola, aquatic mites, cladocerans, ostracods, copepods, malacostraca and chironomids included in 52 families, 70 genera and 132 species. The curatorial status of specimens up to the species level is incomplete, so the total number is increased to 205 possible species represented by barcode index numbers (BINs). The work has been complex, as there are species that might be new to science or geographical range expansions. On the other hand, extreme forms of the same species have also been detected within the study area, as Bosmina tubicen, being easily confused with B. huaronensis. However barcodes indicate a single species. In the same way, morphologically similar species may be different, as it happens with some ostracods. In conclusion, despite the progress made, it is necessary to continue this work, as the zooplankton community can be a strong indicator of anthropogenic alterations in places still considered pristine, such as Laguna de Bacalar and the large number of cenotes that are currently tourist attractions.


9.
- Artículo con arbitraje
Improved protocols to accelerate the assembly of DNA barcode reference libraries for freshwater zooplankton
Elías Gutiérrez, Manuel ; Valdéz Moreno, Martha (coaut.) ; Topan, Janet (coaut.) ; Young, Monica R. (coaut.) ; Cohuo Colli, José Ángel (coaut.) ;
Contenido en: Ecology and Evolution Vol. 8, no. 5 (2018), p. 3002-3018 ISSN: 2045-7758
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Resumen en: Inglés |
Resumen en inglés

Currently, freshwater zooplankton sampling and identification methodologies have remained virtually unchanged since they were first established in the beginning of the XX century. One major contributing factor to this slow progress is the limited success of modern genetic methodologies, such as DNA barcoding, in several of the main groups. This study demonstrates improved protocols which enable the rapid assessment of most animal taxa inhabiting any freshwater system by combining the use of light traps, careful fixation at low temperatures using ethanol, and zooplankton-specific primers. We DNA-barcoded 2,136 specimens from a diverse array of taxonomic assemblages (rotifers, mollusks, mites, crustaceans, insects, and fishes) from several Canadian and Mexican lakes with an average sequence success rate of 85.3%. In total, 325 Barcode Index Numbers (BINs) were detected with only three BINs (two cladocerans and one copepod) shared between Canada and Mexico, suggesting a much narrower distribution range of freshwater zooplankton than previously thought. This study is the first to broadly explore the metazoan biodiversity of freshwater systems with DNA barcodes to construct a reference library that represents the first step for future programs which aim to monitor ecosystem health, track invasive species, or improve knowledge of the ecology and distribution of freshwater zooplankton.


10.
Artículo
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