22 Works

Revueltas internacionalista proletario, herido por México. Estampas alemanas

Edith Negrín
pp. 144-157. Germany was a constant presence in various stages of the life of Jose Revueltas, for various reasons. The first contact, unintended and ungrateful, was its assistance to the German School, in the capital of the country. The subsequent linkages, already in adult life, were intentional and vertebrated by political practice. The relationship of the activist with the European country was determined by its vision of the world, a complex and emotional ideological assembly...

SSP: An R package to estimate sampling effort in studies of ecological communities

Edlin Guerra-Castro, Juan Carlos Cajas, Nuno Simoes, Juan Jose Cruz-Motta & Maite Mascaro
SSP (simulation-based sampling protocol) is an R package that uses simulations of ecological data and dissimilarity-based multivariate standard error (MultSE) as an estimator of precision to evaluate the adequacy of different sampling efforts for studies that will test hypothesis using permutational multivariate analysis of variance. The procedure consists in simulating several extensive data matrixes that mimic some of the relevant ecological features of the community of interest using a pilot data set. For each simulated...

Functional niche constraints on carnivore assemblages (mammalia: carnivora) in the Americas: What facilitates coexistence through space and time?

Andrés Arias-Alzate, Felber J. Arroyave, Oscar Y. Romero Goyeneche, Rafael Hurtado Heredia, José F. Gonzalez-Maya, Joaquín Arroyo-Cabrales, A. Townsend Peterson & Enrique Martínez-Meyer
Aim: Mammalian carnivores are among the best studied groups in terms of evolutionary history. However, the effects of species interactions in shaping community assemblages remain poorly understood. We hypothesize that indirect interactions via ecological trait filtering play a key role in structuring carnivoran assemblages, mediate coexistence, and thus should show high functional diversity in space and time at continental scales. Location: Americas. Taxon: Mammalian carnivores (Mammalia: Carnivora). Methods: We followed a macroecological perspective via ecological...

Data from: A millennium of climatic and floristic dynamics in the Eastern Cordillera of the Colombian Andes

Alex Correa, Jaime Escobar, Broxton Bird, Dayenari Caballero-Rodríguez, Byron Steinman, Paula A. Rodríguez-Zorro & Jason Curtis
The transition from the Medieval Climate Anomaly (MCA, 950-1250 CE) to the Little Ice Age (LIA, 1350 to 1800 CE) is the largest pre-industrial climate shift within the last two millennia, offering an opportunity to study how vegetation responds to rapid climate change. We analyzed a sedimentary record from the Colombian Andes to reconstruct regional vegetation dynamics during this time interval, identify the modern environmental distribution of taxa present in the fossil record, and provide...

Systematic revision of the arboreal Neotropical ‘Thorellii’ clade of Centruroides Marx, 1890 bark scorpions (Buthidae c.l. Koch, 1837) with descriptions of six new species

Aaron Goodman, Lorenzo Prendini, Oscar Francke & Lauren Esposito
The arboreal Neotropical ‘thorellii’ clade of Centruroides Marx, 1890 bark scorpions (Buthidae C.L. Koch, 1837) is revised, using a novel approach to species delimitation. A phylogenetic analysis, based on 112 morphological characters and 1078 aligned DNA nucleotides from the mitochondrial Cytochrome c Oxidase Subunit I (COI) gene, provided the framework for placing singletons from geographically disparate localities (and often with suboptimal preservation) using COI minibarcodes, thereby enlarging the taxon sample for diagnosis and delimitation of...

Trait shifts in bird communities from primary forest to human settlements in Mexican seasonal forests: Are there ruderal birds?

Leopoldo D. Vázquez-Reyes
Agriculture, cattle grazing, and human settlements negatively affect bird biodiversity, driving the loss of ecologically specialized species and favoring the dominance of generalists. Because ecological pressures define organisms' success by acting on their intrinsic traits, biodiversity loss due to anthropization might cause directional trait shifts. Here, we use a trait-based approach to find empirical evidence of trait-shifts in bird communities across an anthropization gradient in seasonal forests in central Mexico. We performed point-count bird surveys...

Stingless bees (Apidae: Meliponini) at risk in western Mexico

Ek Del-Val, Francisco Mora, Alejandro Reyes‐Gonzalez, Luciana Porter‐Boland & Maria Isabel Ramírez
The current global pollinator crisis highlights the need to investigate the diversity and distribution of ecologically and socially relevant taxa such as tropical stingless bees. We analyzed the diversity and composition of stingless bee (Meliponini) communities at a regional scale in west-central Mexico using an extensive direct search along an altitudinal gradient encompassing different climate and vegetation types. Our hypothesis was that meliponine bee diversity would be greater in tropical warmer. We found a total...

Caracterização da resposta inflamatória num modelo experimental de neurocisticercose extraparenquimatosa

Pedro Tadao Hamamoto Filho
A neurocisticercose é a doença parasitária mais comum do sistema nervoso central. Ela ocorre pela infestação cerebral pela larva de Taenia solium, que acontece quando se ingerem ovos do parasita. A prevalência da doença diminuiu no final do século XX em razão de medidas sanitárias, porém persiste endêmica em diversas regiões da América Latina, África subsaariana e do sudeste asiático. Fluxos migratórios têm determinado o surgimento de casos novos nos Estados Unidos e na Europa....

Cross-biome synthesis of source versus sink limits to tree growth

Antoine Cabon, Steven A. Kannenberg, Flurin Babst, Dennis Baldocchi, Soumaya Belmecheri, Nicolas Delpierre, Rossella Guerrieri, Justin Maxwell, Shawn McKenzie, Chritoforos Pappas, Adrian Rocha, Paul Szejner, Masahito Ueyama, Danielle Ulrich, Caroline Vincke, Jingshu Wei, David Woodruff, Altaf Arain, Rick Meinzer, David J. P. Moore, Steven L. Voelker, William R. L. Anderegg & Frederick C. Meinzer
Uncertainties surrounding tree carbon allocation to growth are a major limitation to projections of forest carbon sequestration and response to climate change. The prevalence and extent to which carbon assimilation (source) or cambial activity (sink) mediate wood production are fundamentally important and remain elusive. We quantified source-sink relations across biomes by combining eddy-covariance gross primary production with extensive on-site and regional tree ring observations. We found widespread temporal decoupling between carbon assimilation and tree growth,...

Pasajes entre José Revueltas y Goethe

José Manuel Mateo
pp. 158-176. In this article is carried out a follow-up of the phrase "Gray is the theory and green is the tree of gold of life", which José Revueltas took as vital watchword. From 1939 until 1975, shortly before the death of the Mexican author, the phrase appears in letters, notes, and essays, as well as drafts of Los días terrenales, one of the greatest novels of the author. In addition to a minimum record...

Individual growth of the Flathead Knobscaled Lizard, Xenosaurus platyceps, from tropical and temperate populations

Ramón Isaac Rojas-González, Julio A. Lemos-Espinal & Geoffrey R. Smith
Growth rates of ectotherms are frequently affected by environmental conditions, such as temperature, precipitation, and prey availability. However, local adaptation to environmental conditions could influence geographic variation in growth rates. We studied growth rates of the Flathead Knob-scaled Lizard, Xenosaurus platyceps, from a tropical population and a temperate population in Tamaulipas, Mexico. We used a field study and a common garden experiment to examine the extent and potential causes of variation in individual growth rates...

Geographic patterns in pollen production in Euphorbia tithymaloides

N. Ivalu Cacho & Daniel José-Zacatula
In this study We examine investment in male function in the context of geography and floral morphology in the plant ring species Euphorbia tithymaloides, which colonized the Caribbean from Mexico/Guatemala along two fronts that roughly correspond to the Greater and the Lesser Antilles and that meet in the vicinity of the Anegada Passage. Our results on investment in pollen relative to ovule production are consistent with E. tithymaloides relying on pollinators for reproduction across its...

Complex genetic patterns and distribution limits mediated by native congeners of the worldwide invasive red‐eared slider turtle

Sayra Espindola, Ella Vázquez-Domínguez, Miguel Nakamura, Luis Osorio-Olvera, Enrique Martínez-Meyer, Edward Myers, Isaac Overcast, Brendan Reid & Frank Burbrink
Non-native (invasive) species offer a unique opportunity to study the geographic distribution and range limits of species, wherein the evolutionary change driven by interspecific interactions between native and non-native closely related species is a key component. The red-eared slider turtle, Trachemys scripta elegans (TSE), has been introduced and successfully established worldwide. It can coexist with its native congeners T. cataspila, T. venusta and T. taylori in Mexico. We performed comprehensive fieldwork, executed a battery of...

Data from: Forest loss and treeless matrices cause the functional impoverishment of sapling communities in old-growth forest patches across tropical regions

Ricard Arasa-Gisbert, Víctor Arroyo-Rodríguez, Jorge A. Meave, Miguel Martínez-Ramos & Madelon Lohbeck
Landscape-level disturbances, such as forest loss, can profoundly alter the functional composition and diversity of biotic assemblages. In fact, the landscape-moderated functional trait selection (LMFTS) hypothesis states that landscape-level disturbances may act as environmental filters that select a set of species with disturbance-adapted attributes while causing the loss of species with disturbance-sensitive attributes, ultimately compromising ecosystem functioning. However, the impact of landscape patterns on the functional composition and diversity of tropical regenerating trees (saplings) is...

Behavioural and morphological traits influence sex-specific floral resource use by hummingbirds

Maria Alejandra Maglianesi, Pietro Maruyama, Ethan Temeles, Matthias Schleuning, Thais Zanata, Marlies Sazima, Aquiles Gutiérrez-Zamora, Oscar Marín-Gómez, Liliana Rosero-Lasprilla, Monica Ramirez Burbano, Alejandra Ruffini, Ricardo Salamanca-Reyes, Ivan Sazima, Laura E. Nuñez-Rosas, María Del Coro Arizmendi, Carsten Rahbek & Bo Dalsgaard
Research on resource partitioning in plant-pollinator mutualistic systems is mainly concentrated at the levels of species and communities, whereas differences between males and females are typically ignored. Nevertheless, pollinators often show large sexual differences in behaviour and morphology, which may lead to sex-specific patterns of resource use with the potential to differentially affect plant reproduction and diversification. We investigated variation in behavioural and morphological traits between sexes of hummingbird species as potential mechanisms underlying sex-specific...

El formato antológico del cuento policial contemporáneo y sus implicaciones: Buenos Aires Noir y Mexico City Noir

Héctor Fernando Vizcarra
pp. 23-36. Through the examination of Buenos Aires Noir (2017) and Mexico City Noir (2010), released by Akashic Books in its Noir series, this paper analyzes the relations between both volumes and the tradition of “Urban mysteries” literary fiction emerged in the 19th Century, the inherent circulation and validation on the Literary field, and its discursive construction as anthological-format books of stories by their owns kind of publisher’s initiative, the selection criterion and the writers...

Impact of human disturbance on the abundance of non-breeding shorebirds in a subtropical wetland

Eduardo Palacios, Jonathan Vargas, Guillermo Fernandez & Matthew Reiter
Shorebird populations have declined due to several threats throughout their annual cycle. Anthropogenic disturbance is one of the most ubiquitous threats to shorebird conservation in North America. Here, we studied the influence of human disturbance on shorebird community dynamics during migration and winter in Ensenada de La Paz, a subtropical coastal wetland in Mexico. We used negative binomial generalized linear mixed models to investigate the associations between spatial, biological, and anthropogenic variation and local shorebird...

Defensive mutualists affect outcross pollen transfer and male fitness in their host plant

Nora Villamil Buenrostro, Karina Boege & Graham N. Stone
Ant guards can increase plant fitness by deterring herbivores, but they may also reduce it by interfering with pollination. While ant impacts on herbivory have been well-studied, much less is known about their impacts on pollinators and associated consequences for plant pollination, particularly pollen transfer dynamics and outcrossing/selfing rates. We used field experiments to quantify the effect of ant guards on pollinator community composition, frequency and duration of flower visits, and cascading effects on outcrossing...

Demographic modelling helps tracking the rapid and recent divergence of a conifer species pair from central Mexico

Gustavo Ibrahim Giles-Pérez, Erika Aguirre-Planter, Luis Enrique Eguiarte-Fruns & Juan Pablo Jaramillo-Correa
Secondary contact of recently diverged species may have several outcomes, ranging from rampant hybridization to reinforced reproductive isolation. In plants, selfing tolerance and disjunct reproductive phenology may lead to reproductive isolation at contact zones. However, they can evolve under both allopatric or parapatric frameworks and originate from adaptive and/or neutral forces. Inferring the historical demography of diverging taxa is thus a crucial step to identify those factors that may lead to putative reproductive isolation. We...

Data for: The interplay of environmental cues and wood density in the vegetative and reproductive phenology of seasonally dry tropical forest trees

Adriana L. Luna-Nieves, Edgar J. González, Jorge Cortés-Flores, Guillermo Ibarra-Manríquez, Axel Maldonado-Romo & Jorge A. Meave
The great phenological diversification characteristic of seasonally dry tropical forests (SDTF) suggests that these patterns result from a complex interplay between exogenous (e.g., climatic) and endogenous (e.g., morphological, physiological, anatomical) factors. Based on the well-established relationships of wood density with water-storing capacity and cavitation vulnerability in woody plants, we hypothesized differential vegetative and reproductive phenological responses to environmental cues for hardwood and softwood species. To test this hypothesis, we compared phenological patterns of pairs of...

Functional divergence from ecological baselines on Caribbean coral reefs

Sara M. Melo-Merino, Andrés Lira-Noriega, F. Javier González-Barrios, Héctor Reyes-Bonilla & Lorenzo Álvarez-Filip
Understanding how emergent ecological assemblages have diverged from natural states is fundamental in predicting future functioning and services of ecosystems. Coral reefs are of particular concern due to their high susceptibility to anthropogenic stressors. Yet, little is known about their pre-disturbance ranges of natural states, and most reports of decline are based on a limited number of sites and high levels of uncertainty. Here, we used a novel approach to estimate the physical functionality of...

A non-parametric model-free analysis of actigraphic recordings of acute insomnia patients

Arlex Marín-García, Ruben Fossion, Markus Franziskus Müller, Wady Ríos-Herrera & Ana Leonor Rivera
Both parametric and non-parametric approaches to time series analysis have advantages and disadvantages. Parametric methods, although powerful and widely used, can yield inconsistent results due to the oversimplification of the observed phenomena, they require the setting of arbitrary constants for their creation and refinement, and, although these constants relate to assumptions about the observed systems, it can lead to erroneous results when treating a very complex problem with a sizable list of unknowns. Their non-parametric...

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  • National Autonomous University of Mexico
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  • American Museum of Natural History
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