César A. Ríos Muñoz

César A. Ríos Muñoz
Universidad Nacional Autónoma de México | UNAM · Centro de Estudios Mexicanos UNAM-Costa Rica

PhD

About

57
Publications
33,496
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490
Citations
Citations since 2017
27 Research Items
355 Citations
20172018201920202021202220230204060
20172018201920202021202220230204060
20172018201920202021202220230204060
20172018201920202021202220230204060

Publications

Publications (57)
Article
Senticolis triaspis is a widespread polytypic colubrid snake that ranges from the southwestern United States southward along the Pacific Coast and part of the Atlantic Coast of Mexico to Costa Rica. Three subspecies have been described based on differences in color pattern and scutellation: S. t. intermedia, S. t. mutabilis, and S. t. triaspis. The...
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Climate change-driven modifications in thermal and precipitation patterns can result in shifts in species distributions. Avian species in humid mountain forests (HMF) are among the most vulnerable to these atmospheric changes. In this study, we assessed the extent to which climate change could cause distribution shifts in 34 bird species spatially...
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Se abordan los principios biológicos en el proceso de modelado de nicho ecológico, haciendo algunas consideraciones sobre el concepto de nicho ecológico y el área de distribución. Presentamos una compilación y proponemos una clasificación de los algoritmos utilizados en el proceso del modelado de nichos ecológicos. Hacemos énfasis en que cada algor...
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Species that are part of a community may be restricted by available resources. One of them is the acoustic space, where if there is overlap, communication between conspecifics and, potentially, reproduction can be affected. For this reason, it is expected that communities of anurans that present a marked seasonality have a segregation of niche in t...
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Las condiciones o variables ambientales juegan un papel importante en la delimitación de la distribución de las especies, sobre todo cuando nos referimos a escalas regionales, continentales y/o globales (Peterson et al., 2011). Estas condiciones son usadas como predictores en el proceso del modelado de nichos ecológicos (MNE) y/o modelado de distri...
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Variation in leaf morphology is correlated with environmental variables, such as precipitation, temperature and soil composition. Several studies have pointed out that individual plasticity can largely explain the foliar phenotypic differences observed in populations due to climatic change and have suggested that the environment plays an important...
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La elaboración de modelos de nicho ecológico (MNE/Ecological Niche Models) y/o modelos de distribución de especies (MDE/Species Distribution Models) requieren de diferentes fuentes de información para poder hacer la inferencia de la distribución de las especies en un espacio geográfico y ecológico interactuante (Ríos-Muñoz & Espinosa-Martínez, 2019...
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El proceso de modelado de nichos ecológicos y distribución de especies ha sido producto del desarrollo de la teoría de nicho ecológico y algoritmos que han tratado de reproducir las complejas relaciones que dan origen y forma a las áreas de distribución de las especies. El presente trabajo muestra una estrategia metodológica basada en modelos de ni...
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Morphological variation is strongly related to variation in the ecological characteristics and evolutionary history of each taxon. To explore how geographical variation in morphology is related to different climatic gradients and phylogenetic structure, we analyzed the variation of morphological traits (body size, bill, and wing) of 64 species of t...
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Fleas and sucking lice are important vectors of multiple pathogens causing major epidemics worldwide. However these insects are vectors of a wide range of largely understudied and unattended pathogens, especially several species of bacteria’s of the genera Bartonella and Rickettsia. For this reason the aim of the present work was to identify the pr...
Article
Invasive exotic species have been identified worldwide as a major threat to biodiversity. Legal instruments are an important tool in counteracting their negative impacts. There are four important aspects that any legal instrument should have, that is: an explicit (and transparent) method for species inclusion; an exclusive focus, so that conflict b...
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The Nuclear Central American Highlands (NCAH) is a mountainous region located within a complex transition zone. Here, we analyzed the distribution patterns of 282 species of resident land birds of the NCAH. We gathered a database with records of presence of species, from which we generated realized ecological niche models using the Genetic Algorith...
Chapter
La obra ornitológica de Alfredo Dugès abarca 21 publicaciones, colocándolo como el autor más prolífico y que se mantuvo publicando por más tiempo durante la primera etapa de la ornitología mexicana (1860-1910). Sus investigaciones abarcan gran cantidad de temas ornitológicos relacionados con faunística, anatomía, taxonomía, biogeografía y etología,...
Chapter
Como resultado de una búsqueda exhaustiva en la literatura y en bases de datos de información taxonómica, se encontraron registros de 103 taxones dedicados a Antoine Louis, Alfred Auguste y Eugène Romain Dugès. Dichos taxones corresponden a una gran variedad de grupos biológicos, que incluyen bacterias, hongos, plantas, invertebrados, vertebrados,...
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El estado de Guerrero se encuentra ubicado en el centro poniente de México, al sur del Eje Volcánico Transversal. Con objeto de actualizar el conocimiento de los mamíferos nativos del estado, se revisó la literatura disponible en referencia a dichos animales que han sido registrados en el territorio estatal, encontrando que la mayor parte de los es...
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RESUMEN El estado de Zacatecas se encuentra ubicado en el centro geográfico de México, al norte del Eje Volcánico Transversal. Para llevar a cabo este trabajo se reviso la literatura disponible en refe-rencia a los mamíferos que han sido registrados en el territorio estatal, encontrando que la mayor parte de los estudios se han realizado en los últ...
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On 7 December 2016, the federal government of Mexico published an Agreement listing Exotic Invasive Species for Mexico ([ 1 ][1]). However, the report contains inaccurate information about the species and ambiguous measures regarding the prevention, control, and eradication of these species.
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The state of Coahuila is located in northern Mexico, sharing its boundary with the state of Texas, USA. Available literature was reviewed to evaluate the mammals known from that state. Eight orders, 24 families, 64 genera, and 106 species are currently known for the state, with 19 endemic species for the country and one of these for the state. Most...
Article
The type specimens of amphibians and reptiles of the Museo de Historia Natural Alfredo Dugès, at the University of Guanajuato (MADUG) were reviewed following Smith & Necker's (1943) summary. Owing to this collection's eventful history and its historical importance as the oldest herpetological collection in Mexico, a review of its conservation statu...
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Geographical distribution and habitat of Trochilidae (Aves) in the state of Guerrero, Mexico. The distribution and abundance of species of Trochillidae family is usually influenced by the flowering and phenology of plants used as a feeding source, mainly in primary forest, so that changes in vegetation cover could impact their populations. We analy...
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Here we provide evidence to support an extension of the recognized distributional range of the Mountain Elaenia ( Elaenia frantzii ) to include southern Mexico. We collected two specimens in breeding condition in northwestern Sierra Norte de Chiapas, Mexico. Morphologic and genetic evidence support their identity as Elaenia frantzii . We compared e...
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I present photographic record and feeding behavior of a Neotropic cormorant (Phalacrocorax brasilianus) when eating an armored suckermouth catfish (Pterygoplichthys sp.) in Villahermosa, Tabasco, Mexico. The observation represents the first record of predation for armored suckermouth catfish by a resident bird, suggesting an abundant presence of th...
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El estado de Nayarit se encuentra ubicado en el occidente de México, una región clave en el entendimiento biogeográfico de la mastofauna nacional. Se revisó la literatura disponible en referencia a los mamíferos que han sido registrados en el territorio, continental e insular, así como aguas territoriales del estado de Nayarit, México, encontrando q...
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Background Leptospirosis is widespread in Mexico, yet the potential distribution and risk of the disease remain unknown. Methodology/Principal Findings We analysed morbidity and mortality according to age and gender based on three sources of data reported by the Ministry of Health and the National Institute of Geography and Statics of Mexico, for t...
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Leptospira interrogans has been identified to cause leptospirosis, a widespread zoonotic disease that has been identified in domestic and wild animals. This work analyzed kidneys from two species of wild rodents from the state of Campeche, Mexico. Analyses were made by PCR using specific primers for detection of Leptospira interrogans DNA. The rode...
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We report new records of the house mouse (Mus musculus) collected in Socorro Island, in the Mexican Pacific Ocean. These records contribute to extend the knowledge about the present range and possible causes of the presence of the species in different localities in the island.
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Development of Mammalogy in Mexico has taken a long road from the time when a large number of foreign specialists undertook studies in the country in the early years to the present when a critical mass of national researchers has been reached, creating and supporting the development of several associations and groups that bring together either gene...
Article
The Sierra Madre Occidental (SMOc) is located in the boundary between the Nearctic and Neotropical regions, area which has been considered as a complex transition zone. We analysed biogeographic patterns of its resident avifauna, including species richness, endemism, and biotic regionalization by analysing presence-absence matrices of 148 species o...
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Forest structure and composition have been used to assess the habitat characteristics that determine bird distributions. The patterns of distribution have been shaped by historical and ecological factors that play different roles at both temporal and spatial scales. The objectives of this research were to characterize the habitat of the endangered...
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There are differences in the biotic delimitation and recognition of the central part of the Americas, specifically from southern Mexico to northern South America. The delimitation of this area has been difficult when typical characteristics, product of patterns of distribution of the species, and diagnostic criteria are considered in its identifica...
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Este trabajo presenta una propuesta de regionalización biogeográfica de los bosques tropicales perennifolios de Mesoamérica, resultado de un análisis de parsimonia de endemismos (PAE), utilizando modelos de nicho ecológico (GARP) con mamíferos terrestres, usando 41 527 registros para las 233 especies de mamíferos reconocidas. La regionalización pro...
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The distribution of bird species in the Mexican state of Querétaro was analyzed, based on the determination of potential distribution areas using ecological niche modeling. The potential distributions were also used to define areas of endemism for the birds in the state, applying a parsimony analysis of endemicity, and the protective effectiveness...
Article
Biogeographic patterns of avifaunas associated with seasonally dry tropical forests in Mesoamerica are poorly understood despite their high levels of species richness and endemism. Through the parsimony analysis of endemicity, we analyzed biogeographic relationships of 650 resident species of birds associated with seasonally dry tropical forests fr...
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A bioclimatic modeling of the tree Ternstroemia lineata DC. (Ternstroemiaceae) was undertaken. The genus itself is considered as diagnostic or characteristic of the Mexican cloud forest. Ternstroemia lineata has the broadest distribution of all species in this family in Mexico and northern Central America. This species consists of two subspecies, T...
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El bosque tropical caducifolio (BTC) es uno de los ambientes tropicales con mayor representación en México, pero el grado de deforestación ha hecho que actualmente solo cerca del 30% de la distribución original esté en buen estado de conservación. Las repercusiones de la degradación de este hábitat sobre la avifauna se observan en la diferencia en...
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We analyzed the historical and current distributional range data of the Blue-gray Tanager, and reported new nesting records in northeastern Mexico. We also assessed the range extension of this species into human-altered habitats in the Yucatán Peninsula and northeastern Mexico, based both on records from fieldwork and biological databases. We ident...
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Un manuscrito inédito de Alfredo Dugès se encontró en Guanajuato, México. Este manuscrito tiene interés ya que representa las ideas de A. Dugès sobre la posición filogenética de varios grupos de lagartijas a la luz del conocimiento en el siglo XIX. Es importante su conclusión sobre la posición filogenética de Heloderma, la única lagartija venenosa...
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Taxus globosa is a gymnosperm inhabiting Mexican and northern Central American temperate forests, and it has been considered as threatened by Mexican and international conservancy agencies. In Mexico, habitat loss is oneof the main threats for most of the cloud forest species including this taxon, being human-induced land use change a key issue. We...
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Una de las mayores amenazas para los psitácidos neotropicales es la pérdida del hábitat, la cual resulta principalmente de la modificación de la cobertura vegetal por factores antropogénicos. En este trabajo analizamos la modificación de la cobertura vegetal durante tres períodos (1976, 1996 y 2000) y su influencia en la distribución hipotética de...
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Presentamos un registro adicional del buscabreña (Icteria virens), un ave poco común en la cuenca del Valle de México y que corresponde al segundo ejemplar registrado para el Distrito Federal después de 120 años.
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Habitat loss remains the major threat to birds in the Neotropics, although there are several additional specific threats, for example trade, nest parasitism, invasives on islands, and for seabirds, bycatch. Capacity building also remains a key issue for conservation in the area. Nevertheless, the region has benefited by a surge in research, with an...

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