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DNA metabarcoding reveals seasonal changes in diet composition across four arthropod-eating lizard species(Phrynosomatidae:Sceloporus)

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Integrative Zoology 2024年第3期19卷 480-495页

作者： Mauricio hernÁndez Stephanie HEREIRA-pacheco Antton ALBERDI Aníbal H.DÍAZ DE LA VEGA-PÉREZ Arturo ESTRADA-TORRES sergio ANCONA Yendi E.NAVARRO-NOYA Doctorado en Ciencias Biológicas Centro Tlaxcala de Biología de la ConductaUniversidad Autónoma de TlaxcalaTlaxcalaMexico Estación Científica La Malinche Centro Tlaxcala de Biología de la ConductaUniversidad Autónoma de TlaxcalaTlaxcalaMexico Center for Evolutionary Hologenomics The Globe InstituteUniversity of CopenhagenCopenhagenDenmark Consejo Nacional de Ciencia y Tecnología-Centro Tlaxcala de Biología de la Conducta Universidad Autónoma de TlaxcalaTlaxcalaMexico Departamento de Ecología Evolutiva Instituto de EcologíaUniversidad Nacional Autónoma de MéxicoMexico CityMexico Laboratorio de Interacciones Bióticas Centro de Investigación en Ciencias BiológicasUniversidad Autónoma de TlaxcalaSan Felipe IxtacuixtlaTlaxcalaMexico

Diet composition and its ecological drivers are rarely investigated in coexisting closely related *** used a molecular approach to characterize the seasonal variation in diet composition in four spiny lizard species inhabiting a mountainous *** metabarcoding revealed that the lizards Sceloporus aeneus,***,***,and *** mostly consumed arthropods of the orders Hemiptera,Araneae,Hymenoptera,and *** terrestrial lizards *** and *** mostly predated ants and spiders,whereas the arboreal–saxicolous *** and saxicolous *** largely consumed grasshoppers and *** taxonomic and phylogenetic diversity of the prey was higher during the dry season than the rainy season,likely because reduced prey availability in the dry season forced lizards to diversify their diets to meet their nutritional *** and phylogenetic composition varied seasonally depending on the species,but only dietary composition varied with *** dietary turnover was greater in *** than in ***,suggesting site-specific seasonal variability in prey availability;no other differences among species were ***,which lives at the highest altitude in our study site,displayed interseasonal variation in diet *** differences were correlated with the species’feeding strategies and elevational distribution,which likely contributed to the coexistence of these lizard species in the studied geographic area and beyond.

关键词： arthropod-eating lizards diet breadth environmental barcoding mountainous ecosystem seasonal dietary shifts

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Isolation and Characterization of Mercury Resistant Trichoderma Strains from Soil with High Levels of Mercury and Its Effects on Arabidopsis thaliana Mercury Uptake

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Advances in Microbiology 2018年第7期8卷 600-613页

作者： JoséLuis hernández-Flores JoséGerardo Bernal Melo Andrés Cruz hernández Miguel A.Ramos López Carlos Saldana Gutiérrez sergio Romero Gomez Victor Pérez Moreno Rosa P.Calvillo Medina JoséHumberto Valenzuela Soto sergio pacheco hernández George H.Jones sergio Casas Flores Juan Campos-Guillen Laboratorio de Bioseguridad y Análisis de Riesgo Departamento de Ingeniería Genética de PlantasCentro de Investigación y de Estudios Avanzados del IPNIrapuatoGto.México Facultad de Química Universidad Autónoma de QuerétaroCerro de las Campanas s/nQuerétaroQro.México Escuela de Agronomía Universidad De La Salle Bajíocampus Campestre.LeónGto.México Facultad de Ciencias Naturales Universidad Autónoma de QuerétaroAv.De las Ciencias S/NQuerétaroQro.México Centro de Investigación en Química Aplicada Blvd.Enrique Reyna Hermosillo No.140SaltilloCoahuilaMéxico Department of Biology Emory UniversityAtlantaGeorgiaUSA IPICYT División de Biología Molecular.Camino a la presa San JoséNo.2055Colonia Lomas 4a sección.C.P.San Luis PotosíMexico

Traditional mining activities are usually correlated with high levels of soil pollution, which is a major environmental concern. Extensive mining activities have taken place in the San Joaquin region in the State of Querétaro, México resulting in high levels of mercury soil pollution (up to 1532 ± 300 mg/kg). We isolated mercury-resistant fungal strains from the San Joaquin region soils and identified them through morphologic characteristics and ITS rDNA region sequence analysis. We determined that fungi isolated belong to the genus Trichoderma. All the isolates selected showed the ability to catalyze the volatilization of Hg. For air sampling, an active sampling device was constructed and using acid KMnO4 as an absorbent, the concentration of mercury in solution was determined through the cold vapor atomic absorption method. The results show mercury volatilization from the fungal species assay, with a maximum of 213.04 ± 32.6 μg/m3 while mycelium accumulation ranged from less than 17.5 ± 2.9 to 20.0 ± 3.4 μg/g. The fungal isolates were also evaluated for their ability to reduce mercury uptake in Arabidopsis thaliana. These observations suggest the utility of Trichoderma for the mobilization of mercury in those contaminated soils.

关键词： Volatilization Mercury Trichoderma Soil Bioremediation

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Proliferative vitreoretinopathy and its relationship with inflammatory serum biomarkers

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International Journal of Ophthalmology(English edition) 2024年第9期17卷 1659-1664页

作者： Victor Alejandro Martinez pacheco sergio Rojas Juarez Braulio hernan Velasco Sepulveda Abel Ramirez Estudillo Hospital de Nuestra Señora de la Luz Retina and Vitreous DepartmentMexico City 06030Mexico Instituto de Oftlamología FAP Conde de Valenciana Mexico City 06080Mexico

AIM:To analyze if a relationship between levels ofinflammatory serum biomarkers and severity of primaryproliferative vitreoretinopathy(PVR)***:A retrospective case-control *** adult patients with rhegmatogenous retinaldetachment and primary PVR were included in the *** the control group,healthy adults who underwentcataract surgery were *** grade of PVR wasclassified according to the Retinal Society *** samples were obtained before surgery,and processed in MYTHIC *** of interest wereneutrophil-to-lymphocyte ratio(NLR),platelet-to-lymphocyteratio(PLR),and lymphocyte-to-monocyte ratio(LMR),thetime between the decrease in visual acuity and surgery,PVRgrade,type of surgery,final best corrected visual acuity,andrate of ***:Totally 240 patients were included,120 ineach group,79(65.8%)and 56(46.7%)were male in thePVR and control group,*** A had greaterlevels of monocytes(0.28±0.18 vs 0.12±0.32,P=0.002),neutrophils(4.59±1.51 vs 3.92±1.27,P=0.006),and LMR(9.32±4.42 vs 7.43±3.90,P=0.01).PVR B had a greatermonocyte count(0.30±0.13 vs 0.12±0.32,P=0.001),andPVR C demonstrated higher levels in monocytes(0.27±0.12vs 0.12±0.32,P=0.004),neutrophils(4.39±1.13 vs3.92±1.27,P=0.004),and LMR(9.63±3.24 vs 7.43±3.90,P=0.002)compared to control,*** LMR cut-offvalue of 9.38 predicted PVR with a sensibility of 54.2%andspecificity of 77.5%and NLR cut-off of 1.70 predicted PVRwith a sensibility of 62%and specificity of 54.2%.CONCLUSION:Patients with primary PVR demonstrategreater neutrophil,monocyte,and LMR levels than thecontrol ***-off values obtained from ratios could beuseful in a clinical setting when no posterior view of thefundus is possible due to media opacity.

关键词： biomarkers proliferative vitreoretinopathy retinal detachment inflammation serum

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Comparative analysis of two nonlethal methods for the study of the gut bacterial communities in wild lizards

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Integrative Zoology 2023年第6期18卷 1056-1071页

作者： Mauricio hernÁndez sergio ANCONA Stephanie HEREIRA-pacheco Aníbal HDÍAZ DE LA VEGA-PÉREZ Yendi E.NAVARRO-NOYA Doctorado en Ciencias Biológicas Centro de Tlaxcala de Biología de la ConductaUniversidad Autónoma de TlaxcalaTlaxcalaMexico Departamento de Ecología Evolutiva Instituto de EcologíaUniversidad Nacional Autónoma de MéxicoMexico CityMexico Estación Científica la Malinche Centro de Tlaxcala de Biología de la ConductaUniversidad Autónoma de TlaxcalaTlaxcalaMexico Consejo Nacional de Ciencia y Tecnología—Centro Tlaxcala de Biología de la Conducta Universidad Autónoma de TlaxcalaTlaxcalaMexico Laboratorio de Interacciones Bióticas Centro de Investigación en Ciencias BiológicasUniversidad Autónoma de TlaxcalaTlaxcalaMexico

Fecal samples or cloacal swabs are preferred over lethal dissections to study vertebrate gut microbiota for ethical reasons,but it remains unclear which nonlethal methods provide more accurate information about gut *** compared the bacterial communities of three gastrointestinal tract(GIT)segments,that is,stomach,small intestine(midgut),and rectum(hindgut)with the bacterial communities of the cloaca and feces in the mesquite lizard Sceloporus *** hindgut had the highest taxonomic and functional alpha diversity,followed by midgut and feces,whereas the stomach and cloaca showed the lowest *** taxonomic assemblages of the GIT segments at the phylum level were strongly correlated with those retrieved from feces and cloacal swabs(rs>0.84 in all cases).The turnover ratio of Amplicon Sequence Variants(ASVs)between midgut and hindgut and the feces was lower than the ratio between these segments and the *** than half of the core-ASVs in the midgut(24 of 32)and hindgut(58 of 97)were also found in feces,while less than 5 were found in the *** the ASVs level,however,the structure of the bacterial communities of the midgut and hindgut were similar to those detected in feces and *** findings suggest that fecal samples and cloacal swabs of spiny lizards provide a good approximation of the taxonomic assemblages and beta diversity of midgut and hindgut microbiota,while feces better represent the bacterial communities of the intestinal segments at a single nucleotide variation level than cloacal swabs.

关键词： animal microbiome cloacal swabs fecal samples intestinal tract reptile gut microbiome

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Phenotypic Variation among and within Three Peppers Species(Capsicum)from Mexico

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Phyton-International Journal of Experimental Botany 2021年第1期90卷 259-275页

作者： Carlos Eduardo Ornelas-Ramírez sergio hernández-Verdugo Jesús Enrique Retes-Manjarrez Angel Valdez-Ortiz Antonio pacheco-Olvera Tomás Osuna-Enciso Flor Porras Facultad de Agronomía Universidad Autónoma de SinaloaCuliacánSinaloa80000México Programa Regional de Posgrado en Biotecnología Facultad de Ciencias Químico-BiológicasUniversidad Autónoma de SinaloaCuliacánSinaloa80030México Centro de Investigación en Alimentación y Desarrollo A.C.Unidad Culiacán CuliacánSinaloa80110México

The phenotypic variation and its distribution among species,morphotypes,and among and within populations was estimated in 71 populations pertaining to 15 morphotypes of three domesticated species of Capsicum from *** were made in the states of Sinaloa,Nayarit,Oaxaca,Tabasco,and Yucatán in two agroecosystems:Backyard-garden and *** phenotypic characteristics were analyzed through one-way variance analysis and multivariate analyses of principal components analysis(PCA)and hierarchical clustering using Ward’s *** study was performed in a uniform greenhouse experiment.A high variation was found among and within populations in all the measured *** the total variation,13.0%was distributed among species,27.9%among morphotypes,8.1%among populations,and 51.0%within *** plants grew in a uniform environment,these results indicate that the differences observed among and within species,morphotypes,and populations have a genetic *** and multivariate analyses clearly differentiated morphotypes,suggesting that the category of morphotypes must be used to nominate the infraspecific variation in the domesticated *** principal components analysis identified a total of 15 principal components that contributed to explain the total *** first two components explained 59.64%of the total variation and seven components explained more than 90%of the total *** the measured characteristics,number of seed per fruit,weight of the fruit,width of the fruit,length of the fruit,stem diameter,days to flowering,and height of the plant contributed to component 1 variation,whereas width of the leaf,length of the leaf,and number of locules,number of fruits and number of seeds per plant contributed to component *** hierarchical clustering separated the populations and the morphotypes in two large different *** group consisted of populations collected in monoculture conditions and the oth

关键词： Phenotypic variation Capsicum annuum Capsicum chinense Capsicum frutescens morphotype

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Democratic Transition in Mexico： Case of City Juarez

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International Relations and Diplomacy 2017年第3期5卷 134-152页

作者： sergio pacheco Gonzalez Jesus Alberto Rodriguez Alonso Universidad Autonoma de Ciudad Juarez Ciudad Juarez Mexico

The electronic and bibliographic sources, as well as some interviews and focus groups conducted in Ciudad Juarez, Chihuahua, all present interpretations by different actors on the so-called democratic transition in Mexico. The model, proposed Carothers （2002） to explain the transition from a dictatorship to democracy, as stage universally. This article shows which of the five assumptions of the model are present in the experience of the Mexican transition and those that were not consider applicable. He also argues that the model shows features of a teleological perspective, by omitting the particularities of each country, eliminating any reference to diversity and difference, becoming an ideological approach linked to the process of economic globalization. It criticizes the absence of discussion of social and economic objectives that should be priority in a conception of substantive democracy, rather than limiting the horizon of the transition to a liberal and normative conception, that assumes two basic formulas：（1） Democracy is equal to elections; and （2） a citizen is a vote. Contrasting documents on electoral disenchantment in Ciudad Juarez and the actions that various political actors have done, we can illustrate what can be termed substantive citizenship.

关键词： democratic transition authoritarianism electoral democracy liberalization political regime

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Gross Chemical Profile and Calculation of Nitrogen-to-Protein Conversion Factors for Five Tropical Seaweeds

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American Journal of Plant Sciences 2011年第3期2卷 287-296页

作者： Graciela S.Diniz Elisabete Barbarino João Oiano-Neto Sidney pacheco sergio O.Lourenco Departamento de Biologia Marinha Universidade Federal FluminenseNiteróiBrazil Laboratório de Cromatografia Líquida Embrapa Agroindústria de AlimentosRio de JaneiroBrazil Instituto Virtual Internacional de Mudanças Globais Universidade Federal do Rio de Janeiro—UFRJ/IVIGRio de JaneiroBrazil

Despite decades of research on marine algae, there are still significant gaps in basic knowledge about chemical composition of these organisms, especially in tropical environments. In this study, the amino acid composition and contents of total nitrogen, phosphorus, lipid, carbohydrate and protein were determined in Asparagopsis taxiformis, Centroceras clavulatum, Chaetomorpha aerea, Sargassum filipendula and Spyridia hypnoides. The seaweeds showed low lipid contents (lower than 5.5% d.w. in all species) and were rich in carbohydrates (more than 16% d.w. in all seaweeds). The percentage of nitrogen, phosphorus and protein varied widely among species, which red algae showed the highest con-centrations. The amino acid composition was similar among the seaweeds, which glutamic acid, aspartic acid and leu-cine as the most abundant. All species are poor in histidine. An average of 24.2% of the total nitrogen is non-proteinaceous. From data of total amino acid and total nitrogen, specific nitrogen-to-protein conversion factors were calculated for each species. The nitrogen-to-protein conversion factors calculated ranged from 4.51 to 5.21, with an overall average of 4.86. These findings show that the traditional conversion factor of 6.25 should be avoided for seaweeds, since it overestimates the actual protein content.

关键词： Nitrogen-to-Protein Conversion Factors Protein Amino Acid Seaweeds Element Composition Tropical Environment

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Primary reperfusion in acute right ventricular infarction: An observational study

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World Journal of Cardiology 2014年第1期6卷 14-22页

作者： Eulo Lupi-Herrera Héctor González-pacheco úrsulo Juárez-Herrera Nilda Espinola-Zavaleta Eduardo Chuquiure-Valenzuela Ramón Villavicencio-Fernández Marco Antonio Pea-Duque Ernesto Ban-Hayashi sergio Férez-Santander The American British Cowdray Medical Center I.A.P. Chuquiure-Valenzuela Coronary Care UnitNational Institute of Cardiology Ignacio Chavez Marco Antonio Pea-Duque Ernesto Ban-HayashiEchocar- diography and Interventional Cardiology DepartmentsNational Institute of Cardiology Ignacio Chavez Coronary Care Unit National Institute of Cardiology Ignacio Chavez Echocar- diography and Interventional Cardiology Departments National Institute of Cardiology Ignacio Chavez Subdivisions of Clinical-Research and Teaching National Institute of Cardiology Ignacio Chavez

AIM: To investigate the impact of primary reperfusion therapy(RT) on early and late mortality in acute right ventricular infarction(RVI). METHODS: RVI patients(n = 679) were prospectivelyclassified as without right ventricular failure(RVF)(class A, n = 425, 64%), with RVF(class B, n = 158, 24%) or with cardiogenic shock(CS)(class C, n = 96, 12%). Of the 679 patients, 148(21.7%) were considered to be eligible for thrombolytic therapy(TT) and 351(51.6%) for primary percutaneous coronary intervention(PPCI). TIMI 3-flow by TT was achieved for A, B and C RVI class in 65%, 64% and 0%, respectively and with PPCI in 93%, 91% and 87%, respectively. RESULTS: For class A without RT, the mortality rate was 7.9%, with TT was reduced to 4.4%(P < 0.01) and with PPCI to 3.2%(P < 0.01). Considering TT vs PPCI, PPCI was superior(P < 0.05). For class B without RT the mortality was 27%, decreased to 13% with TT(P < 0.01) and to 8.3% with PPCI(P < 0.01). In a TT and PPCI comparison, PPCI was superior(P < 0.01). For class C without RT the in-hospital mortality was 80%, with TT was 100% and with PPCI, the rate decreased to 44%(P < 0.01). At 8 years, the mortality rate without RT for class A was 32%, for class B was 48% and for class C was 85%. When PPCI was successful, the longterm mortality was lower than previously reported for the 3 RVI classes(A: 21%, B: 38%, C: 70%; P < 0.001). CONCLUSION: PPCI is superior to TT and reduces short/long-term mortality for all RVI categories. RVI CS patients should be encouraged to undergo PPCI at a specialized center.

关键词： Right ventricular infarction Reperfusion therapy Ventricular failure Cardiogenic shock Morbidity Mortality

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Determination and Analysis of Hot Spot Areas of Deforestation Using Remote Sensing and Geographic Information System Techniques. Case Study: State Sinaloa, México

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Open Journal of Forestry 2016年第4期6卷 295-304页

作者： sergio Alberto Monjardin Armenta Carlos Eduardo pacheco Angulo Wenseslao Plata Rocha Gabriela Corrales Barraza Rosendo Romero Andrade Jose Carlos Beltran Gonzalez Faculty of Earth Sciences and Space The Autonomous University of Sinaloa Culiacan México Faculty of Forestry and Environmental Sciences University of the Andes Merida Venezuela

The main objective of this research is to analyze deforestation in State Sinaloa during the period 1990-2014. For this, “deforestationhot-spot areas” were identified, by crossing maps of 1993 and 2011 at a 1:250,000 scale with knowledge from environmental and forest experts from each region. Landsat images from 1990 and 2014 and Terra Amazon System were used to monitor the most critical hot spot area, applying Linear Spectral Mixture Analysis and Image Segmentation Ground Product. In order to generate the map deforestation year zero (1990), every segmented object of ground product was visually assigned to “Forest” and “No-Forest” categories. Therefore, gains and losses were interpreted for the map deforestation year one (2014). Those products were validated with the help of experts on the subject and applying a confusion matrix. Results obtained indicated that the highest forest loss was located in North-Central Sinaloa (hot spot area number two) by establishing the average annual rate of deforestation of 4741.90 ha/year with an average rate of 0.60%, being higher than the national average rate (0.37%). This result affects directlyon calculation of carbonfluxes at nationallevel.

关键词： Deforestation Hot Spot GIS Landsat Terra Amazon

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