48 Works

Cumulative germination of seeds ingested by black howler monkeys

Julieta Benitez Malvido & Ana Maria González-Di Pierro
Premise of the Study: Primates are important seed dispersers, especially for large-seeded (> 1 cm length) tropical species in continuous and fragmented rainforests. Methods: In three forest fragments within the Montes Azules Biosphere Reserve, southern Mexico, we investigated the effect of howler monkeys´ (Alouatta pigra) gut passage on the germination rate and maximum germination (%) of native large-seeded species. One group of howler monkeys, per fragment, was followed and fresh feces collected. Large seeds were...

Good alimentation can overcome the negative effects of climate change on growth in reptiles

Pilar Rueda-Zozaya, Melissa Plasman & Victor Hugo Reynoso
Climate change may lead to higher nest temperatures, which may increase embryo development rate, but reduce hatchling size and growth. Larger body size permits better performance, making growth an important fitness trait. In ectotherms, growth is affected by temperature and food quality. To segregate the effects of incubation temperature vs. alimentation on the growth of the Mexican black spiny tailed iguana Ctenosaura pectinata, we incubated eggs at 29 and 32ºC, and hatchlings were kept at...

Etnoarqueología para el combate a la pobreza: la estrategia ignorada por el estado Mexicano

Sandra L. López Varela
pp. 195-211 Alexander von Humboldt (1988 [1811]) describes in his Essai Politique sur le Royaume de la Nouvelle Espagne, the landscape of social inequality that existed in New Spain in terms of the distribution of wealth, civilization and soil cultivation during the reign of Charles IV. For more than two centuries, the Mexican government has tried unsuccessfully to revert social end economic inequality through economic growth and development policies. In the following pages, I discuss...

Data from: Low-copy nuclear genes reveal new evidence of incongruence in relationships within Malvaceae s.l.

Rebeca Hernández-Gutiérrez, Carolina Granados Mendoza & Susana Magallón
The family Malvaceae s. l. is a clade that comprises nine subfamilies. Phylogenetic relationships among them are not completely resolved and are inconsistent among studies, probably due to low phylogenetic informativeness of conventional molecular markers. In the present study, we provide new phylogenetic information for Malvaceae s.l. derived from newly-designed group-specific nuclear markers. By mining transcriptome data from the One Thousand Plant Project (1KP) and publicly available genome information from cotton, cacao, and Arabidopsis, we...

Volcanism and paleoclimate change drive diversification of world’s largest whip spider (Amblypygi)

Frederic Dominique Schramm, Alejandro Valdez-Mondragón & Lorenzo Prendini
The tropics contain many of the most biodiverse regions on Earth but the processes responsible for generating this diversity remain poorly understood. This study investigated the drivers of diversification in arthropods with stenotopic ecological requirements and limited dispersal capability using as model the monotypic whip spider (Amblypygi) genus Acanthophrynus, widespread in the tropical deciduous forests of Mexico. We hypothesized that for these organisms, the tropical deciduous forests serve as a conduit for dispersal, with their...

Data from: Tree recruitment failure in old-growth forest patches across human-modified rainforests

Ricard Arasa-Gisbert, Víctor Arroyo-Rodríguez, Carmen Galán-Acedo, Jorge A. Meave & Miguel Martínez-Ramos
1. Land-use change threatens biodiversity in tropical landscapes, but its impact on forest regeneration remains poorly known. In fact, the landscape-scale patterns driving the diversity of regenerating plants within forest fragments have been rarely explored, and we are uncertain whether such drivers vary across regions with different land-use change patterns. 2. We assessed the effect of landscape composition (forest cover and matrix openness) and configuration (forest patch density) on species diversity of sapling assemblages (trees...

Saguaro recruitment data obtained by inverse-growth modelling

Eugenio Larios, Ricardo Efren Felix-Burruel, Edgar J. Gonzalez & Alberto Burquez
Each year, an individual mature large saguaro cactus produces about one million seeds in attractive juicy fruits that lure seed predators and seed dispersers in a three-month feast. From the million seeds produced, however, only a few will persist into mature saguaros. A century of research on saguaro population dynamics has led to the conclusion that saguaro recruitment is an episodic event that depends on the convergence of suitable conditions for survival during the critical...

Colorful traits in female birds relate to individual condition, reproductive performance, and male mate preferences: A meta-analytic approach dataset

America Hernandez, Rene Beamonte-Barrientos, Margarita Martinez-Gomez & Bibiana Montoya
Colorful traits in females are suggested to have evolved and be maintained by sexual selection. Although several studies have evaluated this idea, support is still equivocal. Evidence has been compiled in reviews, and a handful of quantitative synthesis have explored evidence of the link between condition and specific color traits in males and females. However, understanding the potential function of females’ colorful traits in sexual communication has not been the primary focus of any of...

Elucidating gene expression adaptation of phylogenetically divergent coral holobionts under heat stress

Viridiana Avila-Magaña, Bishoy Kamel, Michael DeSalvo, Kelly Gómez-Campo, Susana Enríquez, Hiroaki Kitano, Rori Rohlfs, Roberto Iglesias-Prieto & Mónica Medina
As coral reefs struggle to survive under climate change, it is crucial to know whether they have the capacity to withstand changing conditions, particularly increasing seawater temperatures. Thermal tolerance requires the integrative response of the different components of the coral holobiont (coral host, algal photosymbiont, and associated microbiome). Here, using a controlled thermal stress experiment across three divergent Caribbean coral species, we attempt to dissect holobiont member metatranscriptome responses from coral taxa with different sensitivities...

Data for: Using spatial patterns of seeds and saplings to assess the prevalence of heterospecific replacements among cloud forest canopy tree species

Nancy R. Mejía-Domínguez, Jorge A. Meave, Carlos Díaz-Ávalos & Lorena Gómez-Aparicio
Questions: To gain insights into the role of species-by-species replacements in cloud forest community structuring, we asked: (1) What are the effects of the spatial distribution of standing individuals on the seed rain, soil seed bank, and sapling density and survival in this cloud forest? and (2) What is the prevalence of conspecific vs. heterospecific replacements in the regeneration of this forest? Location: Santo Tomás Teipan, Oaxaca State, southern Mexico. Methods: In a 1-ha cloud...

The relative effects of pace of life and habitat characteristics on the evolution of sexual ornaments: a comparative assessment

Will Sowersby, Simon Eckerström-Liedholm, Piotr Rowiński, Julia Balogh, Stefan Eiler, Joseph Upstone, Alejandro Gonzalez-Voyer & Björn Rogell
Selection may favor greater investment into sexual ornaments when opportunities for future reproduction are limited (e.g., due to high adult mortality). However, a key driver of mortality, predation, typically selects against elaborate sexual ornaments. Here, we examine the evolution of sexual ornaments in a group of killifishes, which have marked contrasts in life-history strategy between species and inhabit environments that differ in their accessibility to aquatic predators. We first assessed if the size of sexual...

Non-adaptive evolutionary processes governed the diversification of a temperate conifer lineage after its migration into the tropics

Jorge Cruz Nicolás, Alfredo Villarruel-Arroyo, David S. Gernandt, Rosa M. Fonseca, Erika Aguirre-Planter, Luis E. Eguiarte & Juan Pablo Jaramillo-Correa
Constructing phylogenetic relationships among closely related species is a recurrent challenge in evolutionary biology, particularly for long-lived taxa with large effective population sizes and uncomplete reproductive isolation, like conifers. Conifers further have slow evolutionary rates, which raises the question of whether adaptive or non/adaptive processes were predominantly involved when they rapidly diversified after migrating from temperate regions into the tropical mountains. Indeed, fine-scale phylogenetic relationships within several conifer genus remain under debate. Here, we studied...

Data from: Molecular and morphological evidence reveals a new species of Antiphytum (Echiochiloideae, Boraginaceae) from Guerrero, Mexico

Nidia Mendoza-Díaz, Helga Ochoterena, Michael J. Moore & Hilda Flores-Olvera
Molecular and morphological evidence supports a new species in the genus Antiphytum from the Sierra Madre del Sur, in the state of Guerrero, Mexico, here described as A. brevicalyx. This species is unique in the genus by possessing a calyx shorter than the corolla tube at anthesis; it is similar to A. floribundum in inflorescence arrangement, but differs from that species in lacking a basal leaf rosette and having appendages on the corolla throat. According...

Data from: Accelerated diversification explains the exceptional species richness of tropical characoid fishes

Bruno Melo, Brian Sidlauskas, Thomas Near, Fabio Roxo, Ava Ghezelayagh, Luz Ochoa, Melanie Stiassny, Jairo Arroyave, Jonathan Chang, Brant Faircloth, Daniel MacGuigan, Richard Harrington, Ricardo Benine, Michael Burns, Kendra Hoekzema, Natalia Sanches, Javier Maldonado-Ocampo, Ricardo Castro, Fausto Foresti, Michael Alfaro & Claudio Oliveira
The Neotropics harbor the most species-rich freshwater fish fauna on the planet, but the timing of that exceptional diversification remains unclear. Did the Neotropics accumulate species steadily throughout their long history, or attain their remarkable diversity recently? Biologists have long debated the relative support for these museum and cradle hypotheses, but few phylogenies of megadiverse tropical clades have included sufficient taxa to distinguish between them. We used 1288 ultraconserved element loci spanning 293 species, 211...

Data from: Functional innovation promotes diversification of form in the evolution of an ultrafast trap-jaw mechanism

Douglas Booher, Joshua Gibson, Cong Liu, John Longino, Brian Fisher, Milan Janda, Nitish Narula, Evropi Toulkeridou, Alexander Mikheyev, Andrew Suarez & Evan Economo
Evolutionary innovations underlie the rise of diversity and complexity—the two long-term trends in the history of life. How does natural selection redesign multiple interacting parts to achieve a new emergent function? We investigated the evolution of a biomechanical innovation, the latch-spring mechanism of trap-jaw ants, to address two outstanding evolutionary problems: how form and function change in a system during the evolution of new complex traits, and whether such innovations and the diversity they beget...

Interaction network for eleven Cucurbita pepo sites in Guatemala

Patricia Landaverde-González, Eunice Enriquez & Juan Nuñez Farfan
In recent years, evidence has been found that plant-pollinator interactions are altered by land-use and that genetic diversity also plays a role. However, how land-use and genetic diversity influence plant-pollinator interactions, particularly in the Neotropics, where many endemic plants exist is still an open question. Cucurbita pepo is a monoecious plant and traditional crop wide distributed, with high rates of molecular evolution, landraces associated with human cultural management and a history of coevolution with bees,...

Data from: Brain functional networks associated with social bonding in monogamous voles

Sarael Alcauter, M. Fernanda López-Gutiérrez, Zeus Gracia-Tabuenca, Juan J Ortiz, Larry J Young, Francisco J Camacho, Raúl G Paredes, Nestor F. Diaz & Wendy Portillo
Previous studies have related pair bonding in Microtus ochrogaster, the prairie vole, with plastic changes in several brain regions. However, the interactions between these socially-relevant regions have yet to be described. In this study, we used resting state magnetic resonance imaging to explore bonding behaviors and functional connectivity of brain regions previously associated with pair bonding. Thirty-two male and female prairie voles were scanned at baseline, 24h and 2 weeks after the onset of cohabitation....

Geographical variation in the bill-flower fit in a plant-pollinator interaction in western Mexico

Luis A. Sánchez-González, Marisol Ocampo-Sandoval, María Del Coro Arizmendi & Mark E. Olson
Few studies have examined geographical variation in traits involved in biotic interactions, although such variation is likely key in the evolution of interactions. The fit between hummingbird bills and the flowers they feed on suggests mutual selection pressures. We tested for geographical variation in the pollinator – flower fit in the Mexican hermit Phaethornis mexicanus and Heliconia spp. flowers by analyzing the morphospaces of the interacting species and the ways they vary. To analyze the...

Genetic imprints of Brosimum alicastrum (Moraceae) in Mexico

Gabriela López-Barrera, Gabriela López-Barrera, Maried Ochoa-Zavala, Mauricio Quesada, Juan Núñez-Farfán, Antonio González-Rodríguez, Víctor Rocha-Ramírez, Ken Oyama & Nick Harvey
PREMISE: Mechanisms generating the geographical distributions of genetic diversity are a central matter in evolutionary biology. The amount of genetic diversity and its distribution are controlled by several factors, including dispersal abilities, physical barriers and environmental and climatic changes. We investigated the patterns of genetic diversity and differentiation among populations of the widespread species Brosimum alicastrum in Mexico. METHODS: Using nuclear DNA microsatellite data, we determined the current state of genetic diversity and its distribution...

Mangrove sinkholes (cenotes) of the Yucatan Peninsula, a global hotspot of carbon sequestration

Maria Fernanda Adame, Nadia Santini, Olmo Torres-Talamante & Kerrylee Rogers
Mangroves are amongst the most carbon-dense ecosystems on the Planet. The capacity of mangrove forests to accumulate carbon has been assessed and reported at regional, national and global scales. However, small-scale sampling is still revealing ‘hot spots’ of carbon accumulation. This study reports one of these “hotspots” with one of the largest-recorded carbon stocks in the sinkholes (cenotes) of the Yucatan Peninsula, Mexico. We assessed soil organic carbon (SOC) stocks from deep soils (1 to...

Autogenic regulation and resilience in tropical dry forest

Rodrigo Muñoz, Frans Bongers, Danae Rozendaal, Edgar Javier González, Juan Manuel Dupuy & Jorge Meave
1. Engineering resilience, a forest’s ability to maintain its properties in the event of disturbance, comprises two components: resistance and recovery. In human-dominated landscapes, forest resilience depends mostly on recovery. Forest recovery largely depends on autogenic regulation, which entails a negative feedback loop between rates of change of forest state variables and state variables themselves. Hence community dynamics changes in response to deviations from forest equilibrium state. Based on the premise that autogenic regulation is...

Morphology of the limb, shell, and head explain the variation in performance and ecology across 14 turtle taxa (12 species)

Taggert Butterfield, Anthony Herrel, Mark Olson, Jorge Contreras-Garduño & Rodrigo Macip-Ríos
Because morphology directly influences an organism’s ability to utilize its habitat and dietary resources, it also influences fitness. Comparing the relationship between morphology, performance, and ecology is fundamental to understand how organisms evolve to occupy a wide range of habitats and diets. In turtles, studies have documented important relationships between morphology, performance, and ecology, but none were field based or considered limb, shell, and head morphology simultaneously. We compare morphology, performance, and ecology of 14...

Demographic differentiation among pioneer tree species during old-field succession of a Neotropical rainforest

Miguel Martínez-Ramos, María Del Mar Gallego-Mahecha, María Teresa Valverde Valdés, Ernesto Vicente Vega Peña & Frans Bongers
Early pioneer species share life histories enabling them to colonize disturbed sites, but how much they differ demographically and how such differentiation determines pioneer species turnover during succession are still open questions. Here, we approached these issues by comparing the demography of dominant pioneer tree species during the old-field succession of tropical rainforest in Southeast Mexico. We assessed changes in population density, population structure, vital rates, and intrinsic population growth rate (r) of the pioneer...

Evidence of morphological divergence and reproductive isolation in a narrow elevation gradient

Diego Velez-Mora, Karla Trigueros-Alatorre & Pedro F. Quintana-Ascencio
Elevation gradients generate different environmental conditions. This environmental differentiation can influence morphological adaptation, habitat isolation, reproductive isolation, and pollinator limitation in plants. Habitat differentiation and isolation often act first on phenotypic traits and then on genotype variation, causing genetic divergences between populations. We evaluated the effect of elevation on morphological traits, reproductive isolation, and pollinator limitation in Croton aff. wagneri in dry shrublands of inter-Andean valleys in Ecuador. We measured morphological traits of Croton at...

Environment driven changes in diversity of riparian plant communities along a mountain river

Nihaib Flores-Galicia
The study of changes in species richness and composition along rivers has focused on large spatial scales. It has been ignored that in different sections of the river (high mountain area, middle zone and river mouth) the specific environmental conditions can generate different longitudinal patterns of the species richness and composition. In this study we determine if species richness and composition of the riparian plant communities change along a mountain river and if these changes...

Registration Year

  • 2021
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Affiliations

  • National Autonomous University of Mexico
    48
  • Wageningen University & Research
    3
  • Universidad Michoacana de San Nicolás de Hidalgo
    2
  • Universidad de Ciencias y Artes de Chiapas
    2
  • Osaka City University
    2
  • Swedish University of Agricultural Sciences
    2
  • American Museum of Natural History
    2
  • Yale University
    2
  • Harvard University
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  • Cornell University
    2