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  1 / 17215 MEDLINE  
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[PMID]:29406657
[Au] Autor:Ivey J
[Ti] Título:Evaluation: What Is All the Fuss About?
[So] Source:Pediatr Nurs;42(6):293, 2016 Nov-Dec.
[Is] ISSN:0097-9805
[Cp] País de publicação:United States
[La] Idioma:eng
[Mh] Termos MeSH primário: Bullying/prevenção & controle
Estudos de Avaliação como Assunto
Recursos Humanos de Enfermagem/educação
Recursos Humanos de Enfermagem/psicologia
Serviços de Enfermagem Escolar/métodos
[Mh] Termos MeSH secundário: Adulto
Idoso
Feminino
Florida
Seres Humanos
Meia-Idade
Estudos Retrospectivos
Inquéritos e Questionários
Adulto Jovem
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180305
[Lr] Data última revisão:
180305
[Sb] Subgrupo de revista:N
[Da] Data de entrada para processamento:180207
[St] Status:MEDLINE


  2 / 17215 MEDLINE  
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[PMID]:29406652
[Au] Autor:Salmeron PA; Christian BJ
[Ti] Título:Evaluation of an Educational Program to Improve School Nursing Staff Perceptions of Bullying In Pinellas County, Florida.
[So] Source:Pediatr Nurs;42(6):283-92, 2016 Nov-Dec.
[Is] ISSN:0097-9805
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The purpose of this project was to determine if a bullying educational program for school nurses and certified nursing assistants/health technicians (CNAs/HTs) would increase knowledge of bullying, probability of reporting a bully, and probability of assisting a bullied victim. This educational program and evaluation employed a retrospective, post-then-pre-test design. Instruments used included a 17-item demographic questionnaire and the 12-item Reduced Aggression/ Victimization Scale Bullying Assessment Tool (BAT), a 5-point Likert Scale de - signed to assess school nurses' and CNAs'/HTs' understanding of bullying, the probability of reporting bullies, and the probability of assisting bullied victims before and after the educational presentation. Findings of this educational evaluation program indicated that the majority of school nurses and CNAs/HTs had an increased understanding of bullying, higher probability of reporting a bully, and assisting a bullied victim after the presentation.
[Mh] Termos MeSH primário: Bullying/prevenção & controle
Recursos Humanos de Enfermagem/educação
Recursos Humanos de Enfermagem/psicologia
Serviços de Enfermagem Escolar/métodos
[Mh] Termos MeSH secundário: Adulto
Idoso
Feminino
Florida
Seres Humanos
Meia-Idade
Estudos Retrospectivos
Inquéritos e Questionários
Adulto Jovem
[Pt] Tipo de publicação:EVALUATION STUDIES; JOURNAL ARTICLE
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180305
[Lr] Data última revisão:
180305
[Sb] Subgrupo de revista:N
[Da] Data de entrada para processamento:180207
[St] Status:MEDLINE


  3 / 17215 MEDLINE  
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[PMID]:29256429
[Au] Autor:Wyrosdick HM; Gerhold R; Su C; Mignucci-Giannoni AA; Bonde RK; Chapman A; Rivera-Pérez CI; Martinez J; Miller DL
[Ad] Endereço:University of Tennessee, Center for Wildlife Health, Department of Forestry, Wildlife, and Fisheries, Knoxville, TN 37996, USA.
[Ti] Título:Investigating seagrass in Toxoplasma gondii transmission in Florida (Trichechus manatus latirostris) and Antillean (T. m. manatus) manatees.
[So] Source:Dis Aquat Organ;127(1):65-69, 2017 Dec 19.
[Is] ISSN:0177-5103
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:Toxoplasma gondii is a feline protozoan reported to cause morbidity and mortality in manatees and other marine mammals. Given the herbivorous nature of manatees, ingestion of oocysts from contaminated water or seagrass is presumed to be their primary mode of infection. The objectives of this study were to investigate oocyst contamination of seagrass beds in Puerto Rico and determine the seroprevalence of T. gondii in Antillean (Trichechus manatus manatus) and Florida (T. m. latirostris) manatees. Sera or plasma from Antillean (n = 5) and Florida (n = 351) manatees were tested for T. gondii antibodies using the modified agglutination test. No T. gondii DNA was detected via PCR in seagrass samples (n = 33) collected from Puerto Rico. Seroprevalence was 0%, suggesting a lower prevalence of T. gondii in these manatee populations than previously reported. This was the first study to investigate the potential oocyst contamination of the manatee diet, and similar studies are important for understanding the epidemiology of T. gondii in herbivorous marine mammals.
[Mh] Termos MeSH primário: Plantas/parasitologia
Toxoplasma
Toxoplasmose Animal/transmissão
Trichechus manatus/parasitologia
[Mh] Termos MeSH secundário: Animais
Animais Selvagens
Florida/epidemiologia
Porto Rico/epidemiologia
Toxoplasmose Animal/sangue
Toxoplasmose Animal/parasitologia
Trichechus manatus/sangue
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180305
[Lr] Data última revisão:
180305
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171220
[St] Status:MEDLINE
[do] DOI:10.3354/dao03181


  4 / 17215 MEDLINE  
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[PMID]:29406665
[Au] Autor:Kleier JA; Mites-Campbell M; Henson-Evertz K
[Ti] Título:Children's Exposure to Secondhand Smoke, Parental Nicotine Dependence, and Motivation to Quit Smoking.
[So] Source:Pediatr Nurs;43(1):35-9, 2017 Jan-Feb.
[Is] ISSN:0097-9805
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:More than 600,000 people die each year as a result of exposure to secondhand smoke (SHS); 28% of those deaths are children. Most exposure for children occurs in the home and is due to a parent smoking. Parental awareness and understanding of the exposure to SHS and the risk that parental smoking brings to the child may be an effective impetus for smoke avoidance and parental tobacco cessation. This descriptive, correlational study used data provided by a convenience sample of 184 smoking parental-figures, representing 376 children, recruited in community settings. Seven research questions were posed regarding the exposure of children to parental figures who smoke, the degree of the parents' dependence on nicotine, and their level of motivation to stop smoking. Comparisons were made between income levels and ethnic/racial groups. Children's exposure to SHS was low; Asian children had the highest likelihood of exposure. The areas of most frequent exposure were multiunit residential communities and in a vehicle. Parents' dependence on nicotine was moderately high, and parental motivation to quit smoking was high. However, parents who were the most dependent on nicotine were the least motivated to quit. Nurses working with both adult and pediatric populations should address the opportunities for exposure to SHS for their patient population. Community health nurses should specifically target workplaces, businesses, and communities with high numbers of Asian residents for public health education related to childhood exposure to SHS.
[Mh] Termos MeSH primário: Poluição do Ar em Ambientes Fechados/efeitos adversos
Asma/etiologia
Exposição Ambiental/efeitos adversos
Motivação
Pais/psicologia
Abandono do Hábito de Fumar/psicologia
Poluição por Fumaça de Tabaco/efeitos adversos
Tabagismo/prevenção & controle
[Mh] Termos MeSH secundário: Adolescente
Adulto
Idoso
Criança
Feminino
Florida
Seres Humanos
Masculino
Meia-Idade
Nicotina/efeitos adversos
Inquéritos e Questionários
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Tobacco Smoke Pollution); 6M3C89ZY6R (Nicotine)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180301
[Lr] Data última revisão:
180301
[Sb] Subgrupo de revista:N
[Da] Data de entrada para processamento:180207
[St] Status:MEDLINE


  5 / 17215 MEDLINE  
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Registro de Ensaios Clínicos
Texto completo
[PMID]:28459925
[Au] Autor:Carrasquillo O; Lebron C; Alonzo Y; Li H; Chang A; Kenya S
[Ad] Endereço:Department of Medicine, University of Miami Miller School of Medicine, Miami, Florida2Department of Public Health Sciences, University of Miami Miller School of Medicine, Miami, Florida.
[Ti] Título:Effect of a Community Health Worker Intervention Among Latinos With Poorly Controlled Type 2 Diabetes: The Miami Healthy Heart Initiative Randomized Clinical Trial.
[So] Source:JAMA Intern Med;177(7):948-954, 2017 Jul 01.
[Is] ISSN:2168-6114
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Importance: Community health worker (CHW) intervention is a promising approach to address type 2 diabetes among Latinos. However, evidence from randomized clinical studies is limited. Objective: To compare a CHW intervention with enhanced usual care. Design, Setting, and Participants: This 52-week, single-blind, randomized clinical trial included 300 Latino adults aged 18 to 65 years who were treated in 2 public hospital outpatient clinics in Miami-Dade County, Florida, from July 1, 2010, through October 31, 2013. Eligible participants had a hemoglobin A1c (HbA1c) level of 8.0 or greater. Follow-up was completed January 31, 2015, and data were analyzed from March 10, 2015, to June 6, 2016. Interventions: A 1-year CHW intervention consisted of home visits, telephone calls, and group-level activities. Main Outcomes and Measures: Primary outcomes included systolic blood pressure (SBP), low-density lipoprotein cholesterol (LDLC) levels, and HbA1c levels. Secondary outcomes included body mass index, medication regimen intensification, and self-reported measures of diet, physical activity, and medication regimen adherence. Results: Of the 300 participants randomized (135 men [45%] and 165 women [55%]; mean [SD] age, 55.2 [7.0] years), we obtained follow-up data on 215 (71.7%). Participants in the CHW group received a median of 4 home visits and 20 telephone calls. After adjusting for baseline values and covariates, participants in the CHW group had an HbA1c level that was 0.51% lower (95% CI, -0.94% to -0.08%) than that of participants in the enhanced usual care group. The reduction in SBP of 4.62 mm Hg (95% CI, -9.01 to -0.24 mm Hg) did not meet the preplanned target of 8 mm Hg and was not statistically significant in unadjusted models. No significant differences in LDLC levels (mean difference, -8.2 mg/dL; 95% CI, -18.8 to 2.3 mg/dL) or any of the preplanned secondary outcomes were observed. Post hoc analyses suggest that the intervention may be more beneficial among those with worse control of their type 2 diabetes at baseline. Conclusions and Relevance: Among Latinos with poorly controlled type 2 diabetes, a 12-month CHW intervention lowered HbA1c levels by 0.51%. The intervention did not lead to improvements in LDLC levels, and the findings with respect to SBP were variable and half of what was targeted. Future studies should examine whether CHW interventions affect other measures, such as access to health care or social determinants of health. Trial Registration: clinicaltrials.gov Identifier: NCT01152957.
[Mh] Termos MeSH primário: Serviços de Saúde Comunitária
Agentes Comunitários de Saúde
Diabetes Mellitus Tipo 2
Cooperação do Paciente/etnologia
[Mh] Termos MeSH secundário: Adulto
Atitude do Pessoal de Saúde
Glicemia/análise
Serviços de Saúde Comunitária/métodos
Serviços de Saúde Comunitária/organização & administração
Agentes Comunitários de Saúde/organização & administração
Agentes Comunitários de Saúde/psicologia
Diabetes Mellitus Tipo 2/diagnóstico
Diabetes Mellitus Tipo 2/etnologia
Diabetes Mellitus Tipo 2/psicologia
Diabetes Mellitus Tipo 2/terapia
Comportamento Alimentar/etnologia
Comportamento Alimentar/fisiologia
Feminino
Florida/epidemiologia
Hemoglobina A Glicada/análise
Hispano-Americanos/estatística & dados numéricos
Seres Humanos
Masculino
Meia-Idade
Avaliação de Processos e Resultados (Cuidados de Saúde)
Autocuidado/métodos
[Pt] Tipo de publicação:JOURNAL ARTICLE; RANDOMIZED CONTROLLED TRIAL
[Nm] Nome de substância:
0 (Blood Glucose); 0 (Glycated Hemoglobin A)
[Em] Mês de entrada:1708
[Cu] Atualização por classe:180228
[Lr] Data última revisão:
180228
[Sb] Subgrupo de revista:AIM; IM
[Da] Data de entrada para processamento:170502
[Cl] Clinical Trial:ClinicalTrial
[St] Status:MEDLINE
[do] DOI:10.1001/jamainternmed.2017.0926


  6 / 17215 MEDLINE  
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[PMID]:29352307
[Au] Autor:Britch SC; Linthicum KJ; Aldridge RL; Breidenbaugh MS; Latham MD; Connelly PH; Rush MJE; Remmers JL; Kerce JD; Silcox CA; US Navy Entomology Center of Excellence Team
[Ad] Endereço:United States Department of Agriculture, Agricultural Research Service, Center for Medical, Agricultural, & Veterinary Entomology, Gainesville, Florida, United States of America.
[Ti] Título:Aerial ULV control of Aedes aegypti with naled (Dibrom) inside simulated rural village and urban cryptic habitats.
[So] Source:PLoS One;13(1):e0191555, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:We conducted aerial fixed wing ultra low volume (ULV) spray trials with naled to investigate penetration of exposed and simulated cryptic habitat within opened buildings, partially sealed buildings, and outdoor locations targeting sentinel adult Aedes aegypti mosquitoes in north central Florida. Mortality was observed in open and closed buildings and outdoors, even in mosquitoes placed in cryptic habitats. Observations on the impact of building type, mosquito exposure method such as placement in cryptic habitat, and spray nozzle size on mosquito mortality are described and analyzed.
[Mh] Termos MeSH primário: Aedes
Inseticidas
Controle de Mosquitos/métodos
Naled
[Mh] Termos MeSH secundário: Aedes/virologia
Animais
Simulação por Computador
Ecossistema
Florida
Seres Humanos
Insetos Vetores/virologia
Saúde da População Rural
Saúde da População Urbana
Zika virus
Infecção pelo Zika virus/prevenção & controle
Infecção pelo Zika virus/transmissão
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Insecticides); PAM1AI9KU1 (Naled)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180226
[Lr] Data última revisão:
180226
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180121
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0191555


  7 / 17215 MEDLINE  
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[PMID]:29328677
[Au] Autor:Suh JH; Niu YS; Wang Z; Gmitter FG; Wang Y
[Ti] Título:Metabolic Analysis Reveals Altered Long-Chain Fatty Acid Metabolism in the Host by Huanglongbing Disease.
[So] Source:J Agric Food Chem;66(5):1296-1304, 2018 Feb 07.
[Is] ISSN:1520-5118
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Candidatus Liberibacter asiaticus (CLas) is the presumed causal agent of Huanglongbing, one of the most destructive diseases in citrus. However, the lipid metabolism component of host response to this pathogen has not been investigated well. Here, metabolic profiling of a variety of long-chain fatty acids and their oxidation products was first performed to elucidate altered host metabolic responses of disease. Fatty acid signals were found to decrease obviously in response to disease regardless of cultivar. Several lipid oxidation products strongly correlated with those fatty acids were also consistently reduced in the diseased group. Using a series of statistical methods and metabolic pathway mapping, we found significant markers contributing to the pathological symptoms and identified their internal relationships and metabolic network. Our findings suggest that the infection of CLas may cause the altered metabolism of long-chain fatty acids, possibly leading to manipulation of the host's defense derived from fatty acids.
[Mh] Termos MeSH primário: Citrus/metabolismo
Citrus/microbiologia
Ácidos Graxos/metabolismo
Doenças das Plantas/microbiologia
Rhizobiaceae
[Mh] Termos MeSH secundário: Citrus paradisi/metabolismo
Citrus paradisi/microbiologia
Citrus sinensis/metabolismo
Citrus sinensis/microbiologia
Florida
Peroxidação de Lipídeos
Metabolômica
Folhas de Planta/metabolismo
Folhas de Planta/microbiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Fatty Acids)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180226
[Lr] Data última revisão:
180226
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180113
[St] Status:MEDLINE
[do] DOI:10.1021/acs.jafc.7b05273


  8 / 17215 MEDLINE  
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[PMID]:29324791
[Au] Autor:Arnold TE; Kenney WF; Curtis JH; Bianchi TS; Brenner M
[Ad] Endereço:Department of Geological Sciences, University of Florida, Gainesville, Florida, United States of America.
[Ti] Título:Sediment biomarkers elucidate the Holocene ontogeny of a shallow lake.
[So] Source:PLoS One;13(1):e0191073, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:We carried out geochemical analyses on a sediment core from Lake Harris, Florida (USA) to identify sources of organic matter to the sediment throughout the Holocene, and relate changes in those sources to shifts in past climate and environmental conditions. We hypothesized that the sources of organic matter changed in response to regional hydrologic shifts following de-glaciation, and to human population expansion in the state during the 20th century. Hydroclimate shifts in Florida were related to: 1) a steady rise in relative sea level and the fresh water table that began in the early Holocene, 2) wetland formation and expansion ca. 5,000 cal yrs BP, and 3) the onset of the modern El Niño (ENSO) cycle ~3,000 cal yrs BP. Stratigraphic changes in sediment variables from Lake Harris reflect each of these hydroclimate periods. Early in the Holocene, Lake Harris was a marsh-like system in a relatively dry, open-prairie environment. Organic sediments deposited at that time were derived largely from terrestrial sources, as inferred from high TOC/TN ratios, a dominance of longer-chain of n-alkanes (n-C29-31), relatively negative organic carbon isotope values (δ13CTOC), and low biogenic silica concentrations. In the middle Holocene, a positive shift in δ13CTOC coincided with the onset of wetter conditions in Florida. Submerged macrophyte biomarkers (n-C21-23) dominated, and during that period bulk organic carbon isotope values were most similar to δ13C values of mid-chain-length n-alkanes. In the late Holocene, δ13CTOC values declined, CaCO3 levels decreased to trace amounts, organic carbon concentrations increased and diatom biogenic silica concentrations increased from 10 to 120 mg g-1. Around 2,900 cal yrs BP, the effects of ENSO intensified and many Florida lakes deepened to their current limnetic state. Concentrations of algal and cyanobacterial biomarkers in the Lake Harris core increased by orders of magnitude after about AD 1940, in response to human-induced eutrophication, an inference supported by values of δ15N that fluctuate around zero.
[Mh] Termos MeSH primário: Biomarcadores/metabolismo
Sedimentos Geológicos/química
Lagos
[Mh] Termos MeSH secundário: Mudança Climática
Eutrofização
Florida
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Biomarkers)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180223
[Lr] Data última revisão:
180223
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180112
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0191073


  9 / 17215 MEDLINE  
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[PMID]:29267278
[Au] Autor:Ricciardi MJ; Magnani DM; Grifoni A; Kwon YC; Gutman MJ; Grubaugh ND; Gangavarapu K; Sharkey M; Silveira CGT; Bailey VK; Pedreño-Lopez N; Gonzalez-Nieto L; Maxwell HS; Domingues A; Martins MA; Pham J; Weiskopf D; Altman J; Kallas EG; Andersen KG; Stevenson M; Lichtenberger P; Choe H; Whitehead SS; Sette A; Watkins DI
[Ad] Endereço:Department of Pathology, University of Miami Miller School of Medicine, Miami, FL, United States of America.
[Ti] Título:Ontogeny of the B- and T-cell response in a primary Zika virus infection of a dengue-naïve individual during the 2016 outbreak in Miami, FL.
[So] Source:PLoS Negl Trop Dis;11(12):e0006000, 2017 12.
[Is] ISSN:1935-2735
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Zika virus (ZIKV) is a mosquito-borne flavivirus of significant public health concern. In the summer of 2016, ZIKV was first detected in the contiguous United States. Here we present one of the first cases of a locally acquired ZIKV infection in a dengue-naïve individual. We collected blood from a female with a maculopapular rash at day (D) 5 and D7 post onset of symptoms (POS) and we continued weekly blood draws out to D148 POS. To establish the ontogeny of the immune response against ZIKV, lymphocytes and plasma were analyzed in a longitudinal fashion. The plasmablast response peaked at D7 POS (19.6% of CD19+ B-cells) and was undetectable by D15 POS. ZIKV-specific IgM was present at D5 POS, peaked between D15 and D21 POS, and subsequently decreased. The ZIKV-specific IgG response, however, was not detected until D15 POS and continued to increase after that. Interestingly, even though the patient had never been infected with dengue virus (DENV), cross-reactive IgM and IgG binding against each of the four DENV serotypes could be detected. The highest plasma neutralization activity against ZIKV peaked between D15 and D21 POS, and even though DENV binding antibodies were present in the plasma of the patient, there was neither neutralization nor antibody dependent enhancement (ADE) of DENV. Interestingly, ADE against ZIKV arose at D48 POS and continued until the end of the study. CD4+ and CD8+ T-cells recognized ZIKV-NS2A and ZIKV-E, respectively. The tetramer positive CD8+ T-cell response peaked at D21 POS with elevated levels persisting for months. In summary, this is the first study to establish the timing of the ontogeny of the immune response against ZIKV.
[Mh] Termos MeSH primário: Anticorpos Antivirais/sangue
Linfócitos T CD4-Positivos/imunologia
Linfócitos T CD8-Positivos/imunologia
Imunoglobulina G/sangue
Imunoglobulina M/sangue
Zika virus/imunologia
[Mh] Termos MeSH secundário: Adulto
Anticorpos Antivirais/imunologia
Reações Cruzadas/imunologia
Vírus da Dengue/imunologia
Surtos de Doenças
Exantema/virologia
Feminino
Florida
Seres Humanos
Imunoglobulina G/imunologia
Imunoglobulina M/imunologia
RNA Viral/genética
Proteínas do Envelope Viral/imunologia
Zika virus/genética
Infecção pelo Zika virus/imunologia
Infecção pelo Zika virus/virologia
[Pt] Tipo de publicação:CASE REPORTS; JOURNAL ARTICLE; RESEARCH SUPPORT, N.I.H., EXTRAMURAL; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Antibodies, Viral); 0 (Immunoglobulin G); 0 (Immunoglobulin M); 0 (RNA, Viral); 0 (Viral Envelope Proteins)
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180210
[Lr] Data última revisão:
180210
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171222
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pntd.0006000


  10 / 17215 MEDLINE  
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[PMID]:29196340
[Au] Autor:Menges ES; Crate SJH; Quintana-Ascencio PF
[Ad] Endereço:Plant Ecology Program, Archbold Biological Station, Venus, Florida, USA emenges@archbold-station.org.
[Ti] Título:Dynamics of gaps, vegetation, and plant species with and without fire.
[So] Source:Am J Bot;104(12):1825-1836, 2017 Dec.
[Is] ISSN:1537-2197
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:PREMISE OF THE STUDY: Areas lacking dominant plants, or gaps, can support high diversity and specialist species. Previous chronosequence research in Florida rosemary scrub showed indistinct gap area patterns with fire and the dependence of certain species on gaps. We hypothesized that fire and gap size would affect extinction, colonization, diversity, and vegetation composition. METHODS: In 2011-12, we revisited gaps first sampled in 2003, recording vascular plant and ground lichen occurrence by species, gap area, and burn history. We analyzed gap, vegetation, and species dynamics using linear mixed models, with Florida rosemary scrub patch as a random factor. KEY RESULTS: Gap areas declined quickly during the first 10 yr postfire and then stabilized. Between 2003 and 2011-12, unburned gaps usually remained extant or split, whereas burned gaps usually merged. Unburned gaps tended to shrink, whereas burned gaps became larger. Species richness was positively related to gap area, fire, and their interaction. Over time, richness declined in unburned gaps and increased in burned gaps. Local extinction and colonization of individual species were related to fire between 2003 and 2011-12. In burned gaps, ground lichens disappeared, but many herbaceous species, including those killed by fire, increased occupancy. Colonization of most species was favored by burning, large gaps, or both. CONCLUSIONS: In Florida rosemary scrub, fire and increasing gap size increased species richness and many individual species occurrences, reduced local extinctions, and increased colonizations. Therefore, land management activities that encourage the creation and maintenance of large gaps will promote biodiversity in this system.
[Mh] Termos MeSH primário: Ecossistema
Fogo
Plantas/classificação
[Mh] Termos MeSH secundário: Florida
Dinâmica Populacional
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180207
[Lr] Data última revisão:
180207
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171203
[St] Status:MEDLINE
[do] DOI:10.3732/ajb.1700175



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