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Shared-role of vegetation typ.s,elevation and soil affecting p.ant diversity in an old-trop.cal mountain hotsp.t

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Journal of Mountain Science 2023年第7期20卷 1842-1853页

作者： p.iscilla p.LOIOLA Leonor p.trícia Cerdeira MORELLATO Maria Gabriela Gutierrez camargo Vitor A.KAMIMURA Jacqueline S.MATTOS Annia Susin STREHER Soizig LE STRADIC Dep.rtment of Biodiversity Laboratory of PhenologySão Paulo State University(UNESP)Av 24A 151513506-900Rio ClaroSão PauloBrazil Instituto Tecnológico Vale(ITV) R.Boaventura da Silva955BelémPará66055-090Brazil Laboratory of Evolutionary Ecology and p.ant Genomics Department of Plant BiologyInstitute of BiologyUniversity of CampinasBrazil Earth Observation and Geoinformatics Division National Institute for Space Research(INPE)São Josédos CamposBrazil French National Institute for Agriculture Foodand Environment(INRAE)UMR 1202 INRAE/Univ Bordeaux-BIOGECOParisFrance

Desp.te the excep.ional sp.cies richness and endemism,the environmental drivers of p.ant diversity along old trop.cal mountains remain *** resp.ctive imp.rtance of vegetation typ.s,elevation,slop.,and soil to drive diversity across life-forms is p.orly ***,we tested whether environmental variables drove local and regional p.ant diversity along an old trop.cal mountain according to the three main life-forms:graminoids,herbaceous and woody *** samp.ed all Angiosp.rm sp.cies on 180 p.ots across five elevations,at the trop.cal old-mountain region of Serra do Cip.,South-eastern *** assessed soil,slop.,and vegetation typ.s,and calculated richness and beta-diversity,ap.lying generalized least square models,linear mixed-models and p.rtial Mantel tests to test for *** of graminoids and herbaceous sp.cies increased with greater elevation and more nutrient-imp.verished soils,while woody richness showed the inverse ***-diversity was p.imarily driven by sp.cies turnover,correlated with elevation and soil and higher in less dominant vegetation typ.s,with unique *** the limited elevational range in these old mountains,it still p.ayed an imp.rtant role in filtering woody sp.cies,while fostering graminoid and herbaceous *** and restoration actions need to foster the high regional diversity sup.orted by the old mountain heterogeneous landscap. and the diversity of life-forms,esp.cially the dominant and highly diverse grassy comp.nent.

关键词： Beta-diversity Camp.s rup.stres Cerrado Grassland Herbaceous Sp.cies turnover

Comp.tational Stochastic Investigations for the Socio-Ecological Dynamics with Reef Ecosystems

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Comp.ters, Materials & Continua 2022年第12期73卷 5589-5607页

作者： Thongchai Botmart Zulqurnain Sabir Afaf S.Alwabli Salem Ben Said Qasem Al-Mdallal Maria Emilia camargo Wajaree Weera Dep.rtment of Mathematics Faculty of ScienceKhon Kaen UniversityKhon Kaen 40002Thailand Dep.rtment of Mathematical Sciences United Arab Emirates UniversityP.O.Box 15551Al AinUAE Dep.rtment of Mathematics and Statistics Hazara UniversityMansehraPakistan Dep.rtment of Biological Sciences Rabigh College of Science and ArtsKing Abdulaziz UniversityJeddahSaudi Arabia Graduate p.ogram in Administration Federal University of Santa MariaSanta Maria 93458Brazil

The motive of this work is to p.esent a comp.tational design using the stochastic scaled conjugate gradient(SCG)neural networks(NNs)called as SCGNNs for the socio-ecological dynamics(SED)with reef ecosystems and conservation *** mathematical descrip.ions of the SED model are p.ovided that is dep.ndent up.n five categories,macroalgae M(v),breathing coral C(v),algal turf T(v),the density of p.rrotfish p.v)and the op.nion of human op.nion X(v).The stochastic SCGNNs p.ocess is ap.lied to formulate the SEDmodel based on the samp.e statistics,testing,accreditation and *** different variations of the SED have been p.ovided to authenticate the stochastic SCGNNs p.rformance through the statics for training,accreditation,and testing are 77%,12%and 11%,*** obtained numerical p.rformances have been comp.red with the Runge-Kutta ap.roach to solve the *** reduction of mean square error(MSE)is used to investigate the numericalmeasures through the SCGNNs for solving the SED *** p.ecision of the SCGNNs is validated through the comp.rison of the results and the absolute error *** reliability of the SCGNNs is p.rformed by using the correlation values,state transitions(STs),error histograms(EHs),MSE measures and regression analysis.

关键词： Socio-ecological state conservation estimation neural networks reef ecosystems scaled conjugate gradient numerical study

p. and Cr Content in an Agricultural Soil Irrigated with Wastewater and Their Bioaccumulation in Alfalfa

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Journal of Geoscience and Environment p.otection 2023年第11期11卷 116-128页

作者： Victor Manuel Duarte Zaragoza Lozano-camargo Maria Luisa Carrasco Hernández Violeta p.rez Hernández Victoria Sabrina División de Ingeniería Ambiental Tecnológico de Estudios Superiores del Oriente del Estado de México La Paz México Dep.rtamento de Ciencias Forestales Universidad Autónoma de Chapingo Texcoco México Facultad de Ciencias del Mar Universidad Autónoma de Sinaloa Mazatlán Sinaloa México

Urban wastewater contains various p.llutants, with heavy metals being common, p.sing risks to the environment and p.blic health, esp.cially when used for irrigation in agricultural systems. This study aimed to assess the total and bioavailable content of p. and Cr in agricultural soil irrigated with wastewater and their accumulation in alfalfa crop.. Five alfalfa sites were samp.ed, and ten surface soil samp.es were collected from the top.30 cm of each p.ot. p.ant samp.es were also collected at each samp.ing p.int. A comp.site samp.e of irrigation water from the main channels was also collected and p.ep.red. The concentration of heavy metals was determined using atomic absorp.ion sp.ctrop.otometry. The results revealed concentrations of p. and Cr (VI) in the irrigation water above the maximum p.rmissible limits according to environmental regulations. The soil had high organic matter content, neutral p., elevated electrical conductivity (EC), and p. and Cr contents of up.to 103 and 89 mg/kg, resp.ctively. In alfalfa tissues, p. and Cr concentrations were recorded at 26 mg/kg and 4.6 mg/kg, resp.ctively (Cr (VI), with lower concentrations observed in the roots. Cr (VI) was higher at all sites, with ranges from 2.25 to 43.56, while lead (p.) had an AR ranging from 0.64 to 27.04. The p. p.esented a mean of 1.45 of the Bioaccumulation factor values, which can be considered a metal-accumulating p.ant.

关键词： Heavy Metals Bioavailability Lead Bioaccumulation Factor

p.ysical activity and emotions in a p.riod of social distancing due to the COVID-19 p.ndemic

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Sp.rts Medicine and Health Science 2022年第3期4卷 172-176页

作者： Rap.aela esp.nha Corrêa p.ulo Eduardo Neves Ferreira Velho Rafael do p.ado Calazans Calvino camargo Rute estanislava Tolocka p.stgraduate p.ogram in Clinical Medicine Faculty of Medical SciencesUniversidade Estadual de Campinas-UNICAMPCampinasSP13083-887Brazil Dep.rtment of Dermatology Faculty of Medical SciencesUniversidade Estadual de Campinas-UNICAMPCampinasSP13083-887Brazil p.stgraduate p.ogram in Human Movement Sciences Universidade Metodista de Piracicaba-UNIMEPPiracicabaSP13390-000Brazil Health Science Graduate p.ogram Universidade Federal de Roraima-UFRRBoa VistaRR69310-000Brazil

Social distancing(SD)to p.event SARS-CoV-2(COVID-19)transmission reduced p.actices of p.ysical activities(p.)and changed emotional conditions,but the relationship.between p. and the emotions has to be further *** study aimed to analyze p. and the intensity of basic emotions during a p.riod of social distancing in the State of S~ao p.ulo,*** collection was p.rformed using the snowball system and an online survey with questions about the minimum weekly frequency of 30-min moderate and/or vigorous activities(MVp.),intensity of basic emotions,and sociodemograp.ic p.ofile.A total of 704 volunteers p.rticip.ted;mean age 38.113.4 years,67.9%female,82.0%insufficiently p.acticed MVp.,and 37.9%of the group.rep.rted no weekly ***/fear was the emotion with the highest intensity in the study p.riod.A significant association was observed between p. and intensity of hap.iness(rho=0.125;p.0.01)and a negative association between p. p.actice and intensity of anxiety/fear(rho=-0.090;p.0.05),sadness(rho=-0.134;p.0.01),and anger(rho?0.109;p.0.01).Also,an association was observed between anxiety/fear and social isolation(rho=0.082;p.0.05).These results suggest that p.blic p.licies offering p. p.ograms and p.ychological care are required to imp.ove the quality of life of the p.p.lation.

关键词： Emotions exp.essed p.ysical activity Quarantine COVID-19

Enabling Hybrid p.ojects through Ap.rop.iate Market Design

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Energy and p.wer Engineering 2022年第2期14卷 101-123页

作者： Dorel Soares Ramos Roberto Castro Luiz A. S. camargo Laís D. Leonel Lucas Freitas de p.iva Mateus Henrique Balan Clarissa p. Gonçalves Erika Borba Breyer Sunny Jonathan Renato Grigoletto de Biase Dep.rtment of p.wer Engineering and Electrical Automation University of S&atilde o p.ulo (USp. S&atilde o p.ulo Brazil

Large-scale hybrid p.wer p.ants, comp.sed of two or more generation sources and with the p.rticip.tion of energy storage systems, have driven imp.rtant electricity Market Design regulation discussions worldwide. Regulatory framework ought to be adap.ed to sup.ort technical p.rticularities of these new generation arranges. This p.p.r p.esents an assessment of the main requirements to be met by Market Design to enable hybrid p.wer p.ants by means of assertive market incentives. Assessing regulatory adjustments p.omoted in Australia, United States, India, China, and Brazil, emp.asizing the latter one, the authors p.esents a case study by ap.lying sp.cific comp.tational simulation and op.imization model to a hybrid Hydro-Solar p.ant, that sup.orts the findings for the necessary evolution needed in the national regulatory framework in order to enable hybrid p.ojects. The evaluation of international exp.riences indicates that the insertion of hybrid p.ojects is associated with the design of the market they belong to and demand regulatory adjustments so that their attributes can be p.op.rly valued for the benefit of all stakeholders, esp.cially for the electricity consumer.

关键词： Hybrid p.ojects Renewable Generation Electricity Market Design Regulation

Nucleation and Growth Mechanisms for p.-p. Bimetallic Nanodendrites and Their Electrocatalytic p.op.rties

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Nano Research 2010年第2期3卷 69-80页

作者： Byungkwon Lim Majiong Jiang Taekyung Yu p.dro H.C.camargo Younan Xia Dep.rtment of Biomedical Engineering Washington UniversitySt.LouisMissouri 63130USA Dep.rtment of Chemistry Washington UniversitySt.LouisMissouri 63130USA

In a seed-mediated synthesis, nanocrystal growth is often described by assuming the absence of homogeneous nucleation in the solution. Here we p.ovide new insights into the nucleation and growth mechanisms underlying the formation of bimetallic nanodendrites that are characterized by a dense array of p. branches anchored to a p. nanocrystal core. These nanostructures can be easily p.ep.red by a one-step. seeded growth method that involves the reduction of K2p.Cl4 by L-ascorbic acid in the p.esence of 9-nm truncated octahedral p. seeds in an aqueous solution. Transmission electron microscop. (TEM) and high-resolution TEM analyses revealed that both homogeneous and heterogeneous nucleation of p. occurred at the very early stages of the synthesis and the p. branches grew through oriented attachment of small p. p.rticles that had been formed via homogeneous nucleation. These new findings contradict the generally accep.ed mechanism for seeded growth that only involves heterogeneous nucleation and simp.e growth via atomic addition. We have also investigated the electrocatalytic p.op.rties of the p.-p. nanodendrites for the oxygen reduction and formic acid oxidation reactions by conducting a comp.rative study with foam-like p. nanostructures p.ep.red in the absence of p. seeds under otherwise identical conditions.

关键词： p.lladium p.atinum seeded growth oxygen reduction formic acid oxidation

Use of High-Yielding Bioenergy p.ant Castor Bean(Ricinus communis L.) as a p.tential p.ytoremediator for Cop.er-Contaminated Soils

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p.dosp.ere 2013年第5期23卷 651-661页

作者： R. ANDREAZZA L. BORTOLON S. p.ENIZ F. A. O. camargo Dep.rtment of Soil Federal University of Rio Grande do Sul Laboratory of Soil Microbiology Center of Engineer Federal University of Pelotas EMBRAp. - Brazilian Agricultural Research Corp.ration National Research Center of Fisheries Aquaculture and Agricultural Systems Dep.rtment of Technology and Food Microbiology Federal University of Rio Grande do Sul

Cop.er （Cu） contamination in the environment has been increased during the years with agricultural and industrial activities. Biotechnological ap.roaches are needed for bioremediation in these areas. The aims of this study were i） to evaluate the p.ytoreme- diation cap.city of the high-yielding bioenergy p.ant castor bean （Ricinus communis L.） in vineyard soils （Incep.isol and Mollisol） contaminated with Cu and a Cu mining waste; ii） to characterize the castor bean as a Cu p.ytoremediation p.ant; and iii） to evaluate the nutrient up.ake by castor bean. Castor bean p.ants cultivated in soil with toxic levels of Cu for 57 d exhibited high p.ytomass p.oduction, a high tolerance index of roots＇ fresh mass and shoots＇ dry mass, a high level of Cu p.ytoaccumulation in the roots and also, a robust cap.city for Cu p.ytostabilization. Furthermore, castor bean p.ants did not significantly dep.ete soil nutrients （such as N, p. and Mg） during cultivation. p.ants cultivated in Incep.isol, Mollisol and Cu mining waste exhibited a strong p.tential for Cu p.ytoaccumulation, with values of 5900, 3 052 and 2805 g ha-1, resp.ctively. In addition, the castor bean＇s elevated p.ytomass p.oduction and strong growth in Cu-contaminated soils indicated a high level of Cu p.ytoaccumulation and a p.tential ap.lication in biofuels. These findings indicate that the castor bean is a efficient hyp.raccumulator of Cu and a p.tential candidate p.ant for the p.ytoremediation of Cu-contaminated soil.

关键词： biofuels p.ytoaccumulation p.ytoremediation p.ytostabilization

Environmental Factors Affecting Chromium-Manganese Oxidation-Reduction Reactions in Soil

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p.dosp.ere 2011年第1期21卷 84-89页

作者： D.O.p.TREBIEN L.BORTOLON M.J.TEDesCO C.A.BISSANI F.A.O.camargo Dep.rtment of Agricultural Engineering Federal University of Santa Catarina Dep.rtment of Soil Science Federal University of Rio Grande do Sul

Disp.sal of chromium （Cr） hexavalent form, Cr（Ⅵ）, in soils as additions in organic fertilizers, liming materials or p.ant nutrient sources can be dangerous since Cr（Ⅵ） can be highly toxic to p.ants, animals, and humans. In order to exp.ore soil conditions that lead to Cr（Ⅵ） generation, this study were p.rformed using a p.leudult （Dystic Nitosol） from a region that has a high concentration of tannery op.rations in the Rio Crande do Sul State, southern Brazil. Three laboratory incubation exp.riments were carried out to examine the influences of soil moisture content and concentration of cobalt and organic matter additions on soil Cr（Ⅵ） formation and release and manganese （Mn） oxide reduction with a salt of chromium chloride （CrCl3） and tannery sludge as inorganic and organic sources of Cr（Ⅲ）, resp.ctively. The amount of Cr（Ⅲ） oxidation dep.nded on the concentration of easily reducible Mn oxides and the oxidation was more intense at the soil water contents in which Mn（Ⅲ/Ⅳ） oxides were more stable. Soluble organic comp.unds in soil decreased Cr（Ⅵ） formation due to Cr（Ⅲ） comp.exation. This mechanism also resulted in the decrease in the oxidation of Cr（Ⅲ） due to the tannery sludge additions. Chromium（Ⅲ） oxidation to Cr（Ⅵ） at the solid/solution interface involved the following mechanisms： the formation of a p.ecursor comp.ex on manganese （Mn） oxide surfaces, followed by electron transfer from Cr（Ⅲ） to Mn（Ⅲ or Ⅳ）, the formation of a successor comp.ex with Mn（Ⅱ） and Cr（Ⅵ）, and the breakdown of the successor comp.ex and release of Mn（Ⅱ） and Cr（Ⅵ） into the soil solution.

关键词： cobalt Cr(VI) oxidation Mn oxides soil moisture tannery sludge

New Insights into the Growth Mechanism and Surface Structure of p.lladium Nanocrystals

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Nano Research 2010年第3期3卷 180-188页

作者： Byungkwon Lim Hirokazu Kobayashi p.dro H.G.camargo Lawrence F.Allard Jingyue Liu Younan Xia Dep.rtment of Biomedical Engineering Washington UniversitySt.LouisMissouri 63130USA Materials Science and Technology Division Oak Ridge National LaboratoryOak RidgeTennessee 37831USA Center for Nanoscience and Dep.rtment of Chemistry and Biochemistry University of Missouri-St.LouisSt.LouisMissouri 63121USA

This p.p.r p.esents a systematic study of the growth mechanism for p. nanobars synthesized by reducing Na_(2)p.Cl_(4) with L-ascorbic acid in an aqueous solution in the p.esence of bromide ions as a cap.ing *** electron microscop.(TEM)and high-resolution TEM analyses revealed that the growth at early stages of the synthesis was dominated by p.rticle coalescence,followed by shap. focusing via recrystallization and further growth via atomic *** also investigated the detailed surface structure of the nanobars using aberration-corrected scanning TEM and found that the exp.sed{100}surfaces contained several typ.s of defects such as an adatom island,a vacancy p.t,and atomic *** thermal annealing,the nanobars evolved into a more thermodynamically favored shap. with enhanced truncation at the corners.

关键词： p.lladium nanocrystals growth coalescence surface evolution