Divergence in plumage, voice, and morphology indicates speciation in Rufous-capped Warblers (Basileuterus rufifrons)Alana Demko, Roberto Sosa-López, Richard Simpson, Stéphanie Doucet & Daniel Mennill
The biodiversity of the Neotropics is considerable, but it is likely underestimated owing to gaps in sampling effort and a focus on using morphological features of animals to determine species differences rather than divergence in their mating signals and behavior. Recent multi-trait analyses incorporating morphological, plumage, and vocal data have allowed for more accurate quantification of tropical biodiversity. We present a comprehensive study of morphological features, plumage, and vocalizations of the Neotropical resident Rufous-capped Warbler...
The gut microbiome is an integral part of a species’ ecology, but we know little about how host characteristics impact its development in wild populations. Here, we explored the role of such intrinsic factors in shaping the gut microbiome of northern elephant seals during a critical developmental window of six weeks after weaning, when the pups stay ashore without feeding. We found substantial sex-differences in the early-life gut microbiome, even though males and females could...
Acoustic signals used in animal communication play a key role in mate attraction, species recognition and territory defense. Variation in acoustic signals may reflect population structure, lack of gene flow, and phylogenetic relationships. In birds, the study of geographic variation in acoustic signals has been useful for elucidating potential factors involved in phenotypic divergence and for establishing species limits. However, most of the studies on geographic variation have focused on calls and solo songs, with...
Bat acoustic libraries are important tools that assemble echolocation calls to allow the comparison and discrimination to confirm species identifications. The Sonozotz project represents the first nation-wide library of bat echolocation calls for a megadiverse country. It was assembled following a standardized recording protocol that aimed to cover different recording habitats, recording techniques, and call variation inherent to individuals. The Sonozotz project included 69 species of echolocating bats, a high species richness that represents 50%...
In this paper, we study the possible influence of a magnetic narrow region on the propagation of jets with some characteristics of Type II spicules into the solar corona using two approximations: thermo-mechanical (TM) and magnetohydrodynamic (MHD). We motivate the idea of this paper by considering that some advanced 2.5D numerical simulations of radiation MHD of the formation of Type II spicules show the narrowing of the magnetic field lines in the loops where the...
Data from: Pollinator shifts, contingent evolution, and evolutionary constraint drive floral disparity in Salvia (Lamiaceae): evidence from morphometrics and phylogenetic comparative methodsRicardo Kriebel, Bryan Drew, Jesús G. González-Gallegos, Ferhat Celep, Luciann Heeg, Mohamed M Mahdjoub & Kenneth Sytsma
Switches in pollinators have been argued to be key drivers of floral evolution in angiosperms. However, few studies have tested the relationship between floral shape evolution and switches in pollination in large clades. In concert with a dated phylogeny, we present a morphometric analysis of corolla, anther connective, and style shape across 44% of nearly 1,000 species of Salvia (Lamiaceae) and test four hypotheses of floral evolution. We demonstrate that floral morphospace of New World...
Data from: Palaeobiogeography of the north pacific toothed mysticetes (Cetacea, Aetiocetidae): a key to Oligocene cetacean distributional patternsAtzcalli Ehécatl Hernández Cisneros & Jorge Velez Juarbe
Biogeographical distributional patterns of cetaceans reflect dispersal events and colonization of the oceans from their ancestral area in the ancient Sea of Tethys ~53 Ma. Likewise, they shows several vicariance events throughout the evolutionary history of this group. However, our understanding of how these processes took place and what biogeographical scenarios occurred among the different groups of cetaceans through time, is limited. Consequently, this work focuses on explaining the distributional patterns of the well-known North...
Using niche centrality within the scope of the nearly neutral theory of evolution to predict genetic diversity in a tropical conifer species-pairJorge Cruz Nicolás, Gustavo Ibrahim Gilés Pérez, Andrés Lira Noriega, Norberto Martínez-Méndez, Erika Aguirre-Planter, Luis E. Eguiarte & Juan Pablo Jaramillo Correa
Aim: Estimating genetic diversity is key for understanging biogeographic and evolutionary processes. However, gathering genetic information is not feasible for all taxa or populations, particularly in the tropical regions. Identifying proxies for inferring such values has thus become essential. Here, we built on the niche centrality hypothesis (NCH; or central-abundance hypothesis) and the nearly neutral theory of evolution (NNT) to identify some of such proxies using a montane tropical conifer species-pair as model. The NCH...
Titanium dioxide (TiO2) thin films study, deposited by laser ablation on glass substrates in the form of prismatic figures type pyramidalMartín López-García & Fabio Felipe Chalé-Lara
Thin films are something that is very close to the atomic dimensions in thickness, therefore if it is possible to further reduce the width of these, in a controlled way and monitor the behavior of some physical law associated with the variation in thickness, the results can be as expected or maybe adjustments must be applied. For this reason in this work, thin films of titanium dioxide (TiO2) are studied, deposited by laser ablation, on...
Instituto Politécnico Nacional9
National Autonomous University of Mexico3
Natural History Museum of Los Angeles County1
Autonomous University of Queretaro1
University of Bouira1
National Commission for the Knowledge and Use of Biodiversity1
University of Windsor1
Autonomous University of Zacatecas1
University of Edinburgh1
Autonomous University of Campeche1