Artifactual and nonartifactual evidence from the lacustrine shores of the Chalco-Xochimilco Basin suggest the existence of fully sedentary human communities in the Basin of Mexico from at least the sixth millennium B.C.
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A database for the outer sizes of tropical cyclones over the Middle Americas.
Data Brief
December 2024
Instituto de Ciencias de la Atmósfera y Cambio Climático, Universidad Nacional Autónoma de México, Ciudad de México 04510, Mexico.
Tropical cyclones (TCs) are catastrophic phenomena that constantly threaten populations settled in the tropics. Their direct effects (strong winds, storm surges, and intense precipitation) are confined near the TC center. On the other hand, the indirect effects are due to extreme rainfall events associated with rainbands distant from the TC center.
View Article and Find Full Text PDFStable isotope tempestology of tropical cyclones across the North Atlantic and Eastern Pacific Ocean basins.
Ann N Y Acad Sci
December 2024
Department of Earth, Environmental, and Planetary Sciences, Rice University, Houston, Texas, USA.
Tropical cyclones (TCs) are one of the major natural hazards to island and coastal communities and ecosystems. However, isotopic compositions of TC-derived precipitation (P) in surface water (SW) and groundwater (GW) reservoirs are still lacking. We tested the three main assumptions of the isotope storm "spike" hypothesis (sudden spikes in isotopic ratios).
View Article and Find Full Text PDFPhylogeography of the Mesa Silverside fish (Woolman, 1894) throughout the Mexican Plateau.
PeerJ
December 2024
Laboratorio de Biología Acuática, Facultad de Biología, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán, Mexico.
Background: Understanding the processes that influence distribution of organisms is a major goal in evolutionary biology. Speciation in freshwater fishes is mainly associated with the "island-like" model of evolution, in which the formation of land barriers between different hydrographic basins interrupts gene flow and promotes isolation. Freshwater fish therefore provide an excellent model system for macro- and micro-evolutionary studies.
View Article and Find Full Text PDFCOVID-19 outbreaks in endangered Indigenous groups from the Amazonia during the first wave of the COVID-19 pandemic in Ecuador: a retrospective cross-sectional study.
Rural Remote Health
September 2024
One Health Research Group, Universidad de las Américas, Quito, Ecuador.
Introduction: The COVID-19 pandemic has deeply affected Latin American countries, with countless COVID-19 cases and deaths. In countries like Mexico, Brazil, Peru, Colombia and Ecuador, the public health system collapsed and the lack of testing capacity did not allow control of the spread of SARS-CoV-2 during the first year of the COVID-19 pandemic. Moreover, rural and Indigenous communities in these countries, particularly isolated ones like those in the Amazon Basin, were neglected in terms of access to COVID-19 testing and medical aid.
View Article and Find Full Text PDFRange extension of the Mexican-endemic killifish Profundulus chimalapensis (Cyprinodontiformes: Profundulidae), with comments on its phylogenetic placement and possible intergeneric hybridization with Tlaloc Álvarez & Carranza 1951.
Zootaxa
November 2024
Instituto de Ciencias Biológicas; Universidad de Ciencias y Artes de Chiapas; Libramiento Norte Poniente 1150; Col. Lajas Maciel; Tuxtla Gutiérrez 29039 Chiapas; México.
Recent ichthyological surveys in southern Mexico resulted in the unexpected discovery of populations of P. chimalapensis outside its distribution range, broadening its extent of occurrence to a total of three river basins (Coatzacoalcos [original], Grijalva, Ostuta) and two versants (Atlantic [original] and Pacific). The taxonomic nature of these populations was further investigated using comparative genetic data in a phylogenetic framework.
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