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opengpl-3.0-or-laterJan 2021View details →

A spatiotemporal reconstruction of daily ambient temperature using satellite data in the Megalopolis of Central Mexico from 2003–2019

In this project, we built a model to predict the mean, maximum, and minimum temperature on each day at each square in a 1-km grid for an area around Mexico City. See the README at <a href="https://github.com/justlab/Mexico_temperature/blob/master/README.rst">https://github.com/justlab/Mexico_temperature/blob/master/README.rst</a> for more information and instructions, or see the publication at: Gutiérrez-Avila, I., Arfer, K. B., Wong, S., Rush, J., Kloog, I., & Just, A. C. (2021). A spatiotemporal reconstruction of daily ambient temperature using satellite data in the Megalopolis of Central Mexico from 2003–2019. International Journal of Climatology, 41, 4095–4111. <code>doi:10.1002/joc.7060</code>

opencc-zeroApr 2022View details →

Data from: Do metal mines and their runoff affect plumage color? A regional scale study of streak-backed orioles in south-central Mexico

Metal mining causes serious ecological disturbance, due partly to heavy metal (HM) pollution that can accumulate at mining sites themselves and be dispersed downstream as runoff. Plumage coloration is important in birds' social and ecological interactions and sensitive to environmental stressors, and several local-scale studies have found decreased carotenoid-based plumage and/or increased melanin-based plumage in wild birds exposed to HM pollution. We investigated regional-scale effects of proximity to mines and their downstream rivers as a proxy of exposure to HM-contaminated mining waste on plumage coloration in streak-backed orioles (Icterus pustulatus) in south-central Mexico. We measured the plumage color of museum skins using reflectance spectrometry and digital photography, then used geographic information systems to estimate each specimen's distance from the nearest mining concession and river and determine whether that river's watershed contained mines. Proximity to mines and their downstream rivers was related to ventral (but not dorsal) carotenoid-based coloration; birds collected farther from mines had more vivid yellow-orange breast plumage, and belly plumage was more vivid and redder with increasing distance from rivers with upstream mines. Breast background reflectance unexpectedly decreased with mine distance and was higher among birds whose nearest river had mines upstream. The area (but not reflectance) of melanin-based plumage was also related to mines. The area of dark back streaks decreased with mine distance, while the bib patch was smaller among birds presumably more exposed to mining waste. While some of these results are consistent with predicted effects of HM pollution on plumage, most were not straightforward, and effects differed among plumage patches and variables. Further investigation is needed to understand the direct (e.g., toxicity, oxidative stress) and/or indirect (e.g., decreased availability of carotenoid-rich food) mechanisms responsible and their individual, population, and community-level implications.

opencc-zeroJul 2022View details →

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

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 explored various competing hypotheses to account for the rapid divergence of a fir species complex (Abies flinckii - A. religiosa) distributed in 'sky-islands' across central Mexico (i.e., along the Trans-Mexican Volcanic Belt; TMVB). Despite co-occurring in two independent sympatric regions (west and center), these taxa rarely interbreed because of disjunct reproductive phenologies. We genotyped 1,147 SNPs, generated by GBS, across 23 populations, and compared multiple demographic scenarios based on the geological history of the TMVB. The best-fitting model revealed one of the most rapid and complete speciation cases for a conifer species-pair, dating back to ~1.2 Ma. Coupled with the lack of support for stepwise colonization, our coalescent inferences point to an early cessation of interspecific gene flow under parapatric speciation; ancestral gene flow during divergence was asymmetrical (mostly from western firs into A. religiosa) and exclusive to the most ancient (i.e., central) contact zone. Factors promoting rapid reproductive isolation should be explored in other slowly-evolving species complexes as they may account for the large tropical and subtropical diversity.

opencc-by-4.0Dec 2017View details →

Figures 12–13. Quadrophenia sumidero new species. 12 in New genera and species of mimetic Cleridae from Mexico and Central America (Coleoptera: Cleroidea)

Figures 12–13. Quadrophenia sumidero new species. 12) habitus; 13) lateral view.

Figs 144-147 in Aulacidae of the southwestern United States, Mexico, and Central America (Hymenoptera)

Figs 144-147: Pristaulacus arizonicus.

Figs 39-41 in Aulacidae of the southwestern United States, Mexico, and Central America (Hymenoptera)

Figs 39-41: Aulacus aneurus. 39Xead, front. 40Xead, dorsal. 41 Mesosoma, dorsal.

Figs 30-33 in Aulacidae of the southwestern United States, Mexico, and Central America (Hymenoptera)

Figs 30-33: Aulacus leon. 30Xead, front. 31Xead, dorsal. 32 Mesosoma, lateral. 33 Mesosoma dorsal.

Figs 26-29 in Aulacidae of the southwestern United States, Mexico, and Central America (Hymenoptera)

Figs 26-29: Aulacus elongatus. 26Xead, front. 27Xead, dorsal. 28Xead, lateral. 29 Mesosoma, dorsal.

Figs 1-4 in Aulacidae of the southwestern United States, Mexico, and Central America (Hymenoptera)

Figs 1-4: Aulacus maculosus. 1Xead, front. 2Xead, dorsal. 3 Mesosoma, dorsal. 4Vorewing.

Figs 42-44 in Aulacidae of the southwestern United States, Mexico, and Central America (Hymenoptera)

Figs 42-44: Aulacus dispilis. 42Xead, front. 43Xead, dorsal. 44 Mesosoma, dorsal.

Figs 11-13. Aulacus fascius. 11Xead, front. 12Xead, dorsal. 13 in Aulacidae of the southwestern United States, Mexico, and Central America (Hymenoptera)

Figs 11-13. Aulacus fascius. 11Xead, front. 12Xead, dorsal. 13 Mesosoma, dorsal.

Figs 77-82 in Aulacidae of the southwestern United States, Mexico, and Central America (Hymenoptera)

Figs 77-82: Pristaulacus decorus. 77 Head, front. 78 Head, dorsal. 79 Mesosoma,

opencc-zeroFeb 2023View details →

Data from: Two new species of Eleutherodactylus from Western and Central Mexico (Eleutherodactylus jamesdixoni sp. nov., Eleutherodactylus humboldti sp. nov.)

Here, we provide 1) raw and edited recordings of male advertisement calls from two new species of Eleutherodactylus (Syrrhophus) and their sister species, including R scripts used to analyze the data, and 2) photos of preserved specimens from which morphological measurements were collected.