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Camera traps reveal the natural corridors used by mammalian species in eastern Mexico

Ecological Processes 2022年第1期11卷 711-722页

作者： Jonathan O.Huerta‑Rodríguez Octavio C.Rosas‑Rosas Lauro López‑Mata Josél.Alcántara‑Carbajal luis A.Tarango‑Arámbula Programa de Recursos Genéticos y Productividad‑Ganadería Colegio de Post‑graduadosCampus MontecilloTexcocoMexico Programa de Innovación en Manejo de Recursos Naturales Colegio de PostgraduadosCampus San Luis PotosíSan Luis PotosíMexico Programa de Dinámica y Conservación de Bosques y Selvas Macroecología y BiodiversidadColegio de PostgraduadosCampus MontecilloTexcocoMexico

Background:Habitat loss and fragmentation in the Sierra Madre Oriental(SMO)ecological corridor have negative impacts on the movement and distribution of mammalian species that are of great ecological and evolutionary importance.Part of the SMO ecological corridor that is located in the state of Hidalgo is less studied despite being a potential dispersal route for mammals.The objectives of this study were to evaluate the presence and activity of terrestrial mammals in the riparian and non‑riparian zones of SMO.Results:Camera traps detected 15 mammalian species(i.e.,14 native and 1 domestic)in the non‑riparian zone,and 12 mammalian species in the riparian zone(i.e.,10 wild and 2 domestic).The riparian corridor was mainly used by opportunistic medium‑sized carnivores,while large carnivores and their potential prey were more frequent in the non‑riparian zone.Conclusions:Our findings suggest terrestrial mammals avoid the use of natural corridors due to the presence of domestic dogs,cattle and humans and look for new dispersal routes to move through their habitat and find the resources they need to survive.Even though some species can use disturbed corridors to move and find resources,they will change their activity patterns to avoid contact with humans and potential threats like dogs.It is,therefore,crucial to identify not one,but several corridors that must be preserved to improve the connectivity of terrestrial mammals in disturbed landscapes.

关键词： Activity Jaguar Cattle Detectability Dog Herbivore Disturbance Prey Relative abundance

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Anatomical variation of five plant species along an elevation gradient in Mexico City basin within the Trans-Mexican Volcanic Belt, Mexico

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Journal of Mountain Science 2017年第11期14卷 2182-2199页

作者： P Mayte S.JIMéNEZ-NORIEGA Teresa TERRAZAS lauro lópez-mata Arturo SáNCHEZ-GONZálEZ Heike VIBRANS Department of Botany Postgraduate College at Campus Montecillo Institute of Biology Autonomous National University of Mexico Center of Biological Research Autonomous University of State of Hidalgo Mineral de la Reforma

Change in environmental conditions with altitudinal gradients induces morpho-anatomical variations in plants that have been poorly documented in intertropical regions. Five species with three life forms, cryptophyte(Alchemilla procumbens, Geranium seemannii), hemicryptophyte(Acaena elongata, lupinus montanus), and phanerophyte(Symphoricarpos microphyllus), distributed along an altitudinal gradient in the Sierra Nevada of central Mexico, were studied. The aims were to identify and evaluate their morpho-anatomical modifications under the hypothesis that the sizes of individuals and of their wood and leaf cell types decrease as elevation increases. Three individuals per species per site were collected at seven locations along the altitudinal gradient(2949-3952 m). Their morpho-anatomical characters were analyzed through multiple regression analyses. Elevation was the variable that best explained anatomical changes in the leaf and wood ofthe five species. Canopy density and potassium content in the soil also contributed to explain the variation in anatomical variables along the gradient. As elevation increased a bimodal pattern was observed in various anatomical characters as in the leaf width of A. elongata, A. procumbens and G. seemannii and in the vessel diameter of A. procumbens, G. seemannii, and l. montanus. Other features as the vessel diameter of A. elongata, the fiber length of S. microphyllus, and the ray width of A. elongata increased as the elevation increased. Anatomical traits have a tendency to decrease in size but just toward the end of the gradient, which is probably related to changes in canopy density. The plant response to the altitudinal gradient is more focused on anatomical adaptations than morphological variation; it is also species dependent.

关键词： Altitude Foliar anatomy Mount Tlaloc Wood anatomy Alchemilla procumbens Geraniumseemannii Cryptophyte Bimodal pattern

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What is the prognosis of emphysematous pyelonephritis associated with extended-spectrum beta-lactamases producing microorganisms?

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Asian Journal of Urology 2022年第2期9卷 146-151页

作者： JoséIván Robles-Torres Marco Alberto Ocaña-Munguía JoséGustavo Arrambide-Herrera Adrián Mauricio Martínez-Fernández Rodrigo Romero-mata lauro Salvador Gómez-Guerra Urology Department Hospital Universitario"Dr.Jose´Eleuterio Gonza´lez"Universidad Auto´noma de Nuevo LeonMonterreyNuevo LeonMexico

Objective:To describe the microbiological characteristics in emphysematous pyelonephritis(EPN),demonstrate the frequency of extended-spectrum beta-lactamase(ESBl)microorganisms,and determine if these microorganisms are associated with the prognosis of patients with EPN.Methods:We conducted a retrospective study in patients with a diagnosis of EPN in a tertiary care hospital of the northeast region of Mexico during the period from January 2011 to January 2016.Clinical variables were analyzed to determine association with the presence of ESBl-producing microorganisms.Statistical significance was set with plts:A total of 63 patients were included;55(87.3%)of them were females,with a median age of 55(interquartile range:45-65)years.Conservative management was indicated in 38.1%;42.9%were treated with ureteral stent;12.7%with open or percutaneous drainage;15.8%with early nephrectomy;and 9.5%with delayed nephrectomy.Reported mortality was 13(20.6%)cases;23(36.5%)cases required admission to the intensive care unit.The most frequent microorganism isolated was Escherichia coli(n=34,53.9%).ESBl microorganisms were found in 31.7%of the population.No significant association of ESBl was found with admission to the intensive care unit,or with increased mortality.Conclusions:To our knowledge,this is the first study that evaluates ESBl microorganisms as a prognostic factor in EPN.Risk factors associated with a poor prognosis in patients with EPN have been described.The microbiological factors,specifically ESBl-producing bacteria,do not seem to influence in the prognosis of these patients.

关键词： Emphysematous pyelonephritis Extended spectrum betalactamase Mortality Intensive care unit admission

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