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Biodiversity responses to insular fragmentation in amazonia: Two decades of research in the Balbina Hydroelectric Reservoir

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Zoological Research(Diversity and Conservation) 2024年第2期1卷 106-116页

作者： Ana Filipa Palmeirim Maíra Benchimol danielle Storck-Tonon Anderson SBueno Isabel LJones Gilmar Klein Carlos APeres CIBIO Research Centre of Biodiversity and Genetic ResourcesInBIO Associated LabVairão CampusUniversity of PortoVairão 4485-661Portugal BIOPOLIS Program in Genomics Biodiversity and Land PlanningCIBIOVairão CampusUniversity of PortoVairão 4485-661Portugal Laboratório de Ecologia AplicadaàConservação Universidade Estadual de Santa CruzIlhéusBahia 45662-900Brazil Programa de Pós-Graduação em Ambiente e Sistemas de Produção Agrícola(PPGASP) Universidade do Estado de Mato GrossoTangaráda SerraMato Grosso 78301-532Brazil Instituto federal de Educação Ciência e Tecnologia FarroupilhaJúlio de CastilhosRio Grande do Sul 98130-000Brazil Biological and Environmental Sciences University of StirlingStirling FK94LAUK REBIO Uatumã/ICMBio Presidente FigueiredoAmazonas 69736-000Brazil Centre for Ecology Evolution and ConservationSchool of Environmental SciencesUniversity of East AngliaNorwich NR47TJUK JuruáInstitute ManausAmazonas 69057-060Brazil

As hydropower development expands across lowland tropical forests,flooding and concomitant insular fragmentation have become important threats to *** created insular landscapes serve as natural laboratories to investigate biodiversity responses to *** of these most iconic landscapes is the Balbina Hydroelectric Reservoir in Brazilian amazonia,occupying>400000 ha and comprising>3500 forest ***,we synthesise the current knowledge on responses of a wide range of biological groups to insular fragmentation at *** has largely concentrated on a set of 22 islands and three mainland *** total,39 studies were conducted over nearly two decades,covering 17 vertebrate,invertebrate,and plant *** species responses varied according to taxonomic group,island area was consistently included and played a pivotal role in 66.7%of all studies examining patterns of species *** persistence was further affected by species traits,mostly related to species capacity to use/traverse the aquatic matrix or tolerate habitat degradation,as noted for species of vertebrates and orchid *** research is needed to improve our understanding of such effects on wider ecosystem *** Impact Assessments must account for changes in both the remaining habitat amount and configuration,and subsequent long-term species losses.

关键词： Habitat loss Hydropower dams Landbridge Local extinctions Species-area relationships Species diversity Tropical forests

Synthesis of highly fluorescent carbon dots from lemon and onion juices for determination of riboflavin in multivitamin/mineral supplements

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Journal of Pharmaceutical Analysis 2019年第3期9卷 209-216页

作者： Severino S. Monte-Filho Stefani I.E. Andrade Marcelo B. Lima Mario C.U. Araujo universidade federal da Paraíba CCEN Departamento de Química P.O. Box 5093 Zip Code 58051-970 Joao Pessoa PB Brazil universidade federal rural de Pernambuco-Unidade Acad^emica de Serra Talhada UAST Zip Code 56909-535 Serra Talhada PE Brazil

In this work, lemon and onion biomasses commonly found in street markets are for the first time used to develop a facile, fast and low-cost one-step microwave-assisted carbonization method for synthesis of highly fluorescent carbon dots (CDs). The structure and optical properties of CDs were investigated by TEM, XRD, XRF, UV-Vis, FTIR, and fluorescence spectroscopy. CDs displayed satisfactory optical pro-prieties, a high quantum yield of 23.6%, and excellent water solubility, and the particle size was 4.23-8.22 nm with an average diameter of 6.15 nm. An efficient fluorescent resonance energy transfer (FRET) between the CDs and riboflavin was achieved with CDs acting as donor and riboflavin as acceptor. A linear relationship between FRET and the riboflavin concentration from 0.10 to 3.0 μg/mL was observed, allowing the development of an accurate and fast analytical method to determine this vitamin in multivitamin/mineral supplements. Despite the potential interferences in these supplements, CDs were selective for riboflavin under optimized conditions. A paired t-test at a 95% confidence level indicated no statistically significant difference between the proposed and the reference methods. Recovery test presented values ranged from 96.0% to 101.4%. The limit of detection and relative standard deviation were estimated at 1.0 ng/mL and <2.6% (n = 3), respectively. CDs were successfully synthesized in a domestic microwave oven (1450 W, 6 min), presenting satisfactory parameters when compared with results of other studies reported in the literature, suggesting that the proposed method is a potentially useful method for the synthesis of CDs and determination of riboflavin.

关键词： Carbon dots Microwave-assisted carbonization Lemon-onion juice Riboflavin Multivitamin/mineral supplements Fluorescence

Nitrogen Metabolism,Carbohydrates and Sucrose in Young Plants of Paricá(Schizolobium amazonicum)Submitted to Different Dosages of Aluminum

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American Journal of Plant Sciences 2018年第4期9卷 865-879页

作者： Vitor Resende do Nascimento Diana Jhulia Palheta de Sousa Jéssica Suellen Silva Teixeira Jose Jean Borges Leao Liliane Correa Machado Glauco Andre dos Santos Nogueira Candido Ferreira de Oliveira Neto Ana Ecídia de Araújo Brito Ricardo Shigueru Okumura Waldemar Viana de Andrade Júnior Department of Forest Sciences Federal Rural University of Amazonia(UFRA)BelémBrazil Department of Agronomy Federal Rural University of Amazonia(UFRA)BelémBrazil federal rural University of amazonia(UFRA) BelémBrazil federal rural University of amazonia(UFRA) ParauapebasBrazil

The paricá [Schizolobium amazonicum Huber ex Ducke] is a native species of the Amazon region, belonging to the Fabaceae family and is a legume that has great social and economic importance, raw material for the manufacture of wood panels. Heliophilous, with wood of light density and good workability. amazonian soils are highly weathered and characterized by high acidity, so Al harms the growth and development of sensitive plants, as well as the presence of resistant and/or tolerant plants. Thus, in this work, we sought to study the biochemical metabolism alterations generated in young plants of Schizolobium amazonicum Huber ex Ducke affected at different dosages of AlCl3. The research was conducted in a greenhouse of the federal rural University of amazonia, using pre-scarified paricá seeds, which were seeded in plastic containers of 3.5 L capacity, with black soil fertilized with NPK 15-15-20. On the 8th day after sowing (daS), thinning of 5 seedlings was performed for 2, and on day 12 of 2 for 1 seedling. The treatments started after 1 month and 22 days of sowing and the plants were collected 24 days later. A completely randomized experimental design (RED) was used, with 6 treatments (Control, Al 15 mg/L-1, Al 30 mg/L-1, Al 45 mg/L-1, Al 60 mg/L-1 and Al 75 mg/L-1) with 5 replicates each (one plant/pot) totaling 30 experimental units. The AlCl3 dosages resulted in considerable changes in the biochemical variables evaluated, especially when the 75 mg·L-1 dosage was applied. The considerable reduction in some variables such as nitrate reductase, glycine betaine and total soluble carbohydrates of these compounds to the applied AlCl3·6H2O dosages, is a way to create resistance mechanisms to try to overcome stress or as a way of showing limitations in the applied dosages. The species was sensitive to the AlCl3 dosages, and resisted only 23 days to the imposed stress. However, it presented defense mechanisms that were able to prolong the physiological acti

关键词： Dosages Aluminum Stress Schizolobium amazonicum

Dynamics in the emergence of dormant and non-dormant herbaceous species from the soil seed bank from a Brazilian dry forest

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Journal of Plant Ecology 2020年第3期13卷 256-265页

作者： José Djalma de Souza Bruno Ayron de Souza Aguiar danielle Melo dos Santos Vanessa Kelly Rodrigues de Araujo Júlia Arruda Simões Juliana Ramos de Andrade Elcida de Lima Araújo Departamento de Biologia Universidade Federal Rural de PernambucoRecifePernambucoBrazil2Universidade Federal de Pernambuco-Centro Acadêmico de VitóriaPernambucoBrazil

在干旱的热带森林中,草本植物可能具有休眠机制,并在土壤中形成持续和短暂的种子库。这一由进化而获得的机制对草本植物的建植和生存,特别是在气候不可预测的森林生态系统中,具有重要生态适应意义。因此,本研究的目的是验证草本植物是... 详细信息

在干旱的热带森林中,草本植物可能具有休眠机制,并在土壤中形成持续和短暂的种子库。这一由进化而获得的机制对草本植物的建植和生存,特别是在气候不可预测的森林生态系统中,具有重要生态适应意义。因此,本研究的目的是验证草本植物是否具备物理休眠机制,以及这些植物是如何克服这些自然屏障的,并最终理解巴西干旱热带森林土壤种子库中种子萌发时间动态。本研究选择巴西Caatinga森林中的5种本地草本植物的种子,经过发芽前处理来验证是否存在物理休眠。连续4年在雨季和旱季收集土壤样品,并监测这些草本植物种子在温室中的萌发动态。利用广义线性模型验证种子萌发和出苗率的差异。研究结果表明Caatinga森林中的草本植物种子存在着物理休眠和非物理休眠;而且草本植物从土壤种子库中出苗的种内和种间存在着年份和季节的差异。对于多年生草本植物,不同季节和年份频繁出现不出苗的现象,这可能与物理休眠机制和克服种皮障碍所需的环境条件有关。在这些物种中,种子的二态性和休眠可能给它们的生存带来额外的优势。此外,在一年生植物中出现中等水平的物理休眠可能是对降雨不可预测性的进化调整。相比之下,我们发现没有休眠的一年生草本植物对季节和年际气候变化更敏感,这可以从土壤种子库中其出苗率的增加和显著减少得到证明。这些通过进化获得的种子休眠差异有利于那些分布在气候变化无常的半干旱地区草本植物种群的建立。

关键词：草本植物半干旱种子萌发植株建立物理休眠

PLA-Starch Microparticles Containing Clays Focusing Controlled Release of Rifampicin

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Materials Sciences and Applications 2022年第7期13卷 441-452页

作者： Luciana Macedo Brito Maria Inês Bruno Tavares universidade federal rural do Rio de Janeiro Campus Universitário-Seropédica Rio de Janeiro-RJ Brazil Instituto de Macromoléculas Professora Eloisa Mano da universidade federal do Rio de Janeiro (IMA/UFRJ) Centro de Tecnologia Ilha do Fund&atilde o Rio de Janeiro RJ Brazil

Polymer nanocomposites have been successfully used as excipients in pharmaceutical technology because of the convenient features that make them suitable for many applications, especially in controlled drug delivery therapies. The objective of this work was to prepare and characterize PLA and starch microparticles containing Viscogel B8 organophilic clay as a matrix for controlled release of rifampicin, one of the most spread drugs for tuberculosis treatment. The systems obtained by the spray drying technique were characterized by DRX, FTIR, SEM and low-field NMR. In addition, dissolution tests were performed on simulated gastric fluid. The micrographs indicate that the presence of the drug caused a small change in the shape and size of the particles. In the presence of the drug, the particles were spherical and presented wider size distribution. The XRD assays didn’t show crystalline peaks of rifampicin in the microparticles, which suggests that rifampicin exists in an amorphous solid solution inside the starch-PLA particles. The mathematical model of Baker-Lonsdale was chosen for the treatment of the dissolution data, describing the controlled release of the drug from the matrix by a spherical diffusion process. The results suggest that the proposed release system may be used for the delivery of orally administered drugs, such as rifampicin.

关键词： PLA Starch Drug Release Nanotechnology

Botryosphaeria, Neofusicoccum, Neoscytalidium and Pseudofusicoccum species associated with mango in Brazil

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Fungal Diversity 2013年第4期61卷 195-208页

作者： Marília W.Marques Nelson B.Lima Marcos A.de Morais Jr Sami J.Michereff Alan J.L.Phillips Marcos P.S.Câmara Departamento de Agronomia Universidade Federal Rural de Pernambuco52171-900 RecifeBrazil Departamento de Genética Universidade Federal de Pernambuco50732-970 RecifeBrazil Centro de Recursos Microbiológicos Departamento de Ciências da VidaFaculdade de Ciências e TecnologiaUniversidade Nova de Lisboa2829-516 CaparicaPortugal

Members of the Botryosphaeriaceae are well known fungi associated with dieback,canker and fruit rot on various hosts worldwide,including *** aim of this study was identify a large collection of Botryosphaeriaceae species associated with dieback and stem-end rot of mango in the semi-arid region of Northeastern Brazil,and compare the species in relation to mycelial growth,pathogenicity and virulence.A total of 115 isolates were sampled and based on morphology and DNA sequence data(ITS and EF1-α)seven taxa were identified,namely,Botryosphaeria dothidea,***,Fusicoccum fabicercianum,Neofusicoccum parvum,*** ***,Neoscytalidium dimidiatum and Pseudofusicoccum *** and *** were the most commonly isolated species,which represented 37%and 33%of all isolates *** is reported for the first time in association with mango diseases *** were significant differences among the species obtained in this study in relation to optimum temperature for mycelial growth and mycelial growth *** species were pathogenic on mango *** were significant differences in virulence among the species,with *** and *** being the most virulent species,while *** was the least virulent.

关键词： Botryosphaeriaceae Dieback Stem-end rot Mangifera indica Pathogenicity Virulence Phylogeny

Species of Lasiodiplodia associated with papaya stem-end rot in Brazil

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Fungal Diversity 2014年第4期67卷 127-141页

作者： Mariote S.B.Netto Iraíldes P.Assuncao Gaus S.A.Lima Marília W.Marques Waléria G.Lima Jean H.A.Monteiro Valdir de Queiroz Balbino Sami J.Michereff Alan J.L.Phillips Marcos P.S.Camara Departamento de Agronomia Universidade Federal Rural de Pernambuco52171-900 RecifePernambucoBrazil Centro de Ciencias Agrárias Universidade Federal de Alagoas57100-000 Rio LargoAlagoasBrazil Departamento de Genética Universidade Federal de Pernambuco50732-970 RecifeBrazil Centro de Recursos Microbiológicos Departamento de Ciencias da VidaFaculdade de Ciencias e TecnologiaUniversidade Nova de Lisboa2829-516 CaparicaPortugal

This study aims to identify and characterize species of Lasiodiplodia associated with stem-end rot of papaya in six different populations in the Northeast of *** identifications were made using a combination of morphology together with a phylogenetic analysis based on partial translation elongation factor 1-αsequence(EF-1α)and internal transcribed spacers(ITS).Five species of Lasiodiplodia were identified:Lasiodiplodia brasiliense ***.,***,*** ***.,*** and *** *** had previously been reported in papaya,while all the other species are reported for the first time in association with this host in Brazil and *** theobromae was the most prevalent *** species of Lasiodiplodia were pathogenic on papaya fruit,with *** being the most virulent.

关键词： Botryosphaeriaceae Carica papaya Fruit rot EF1-α ITS Phylogeny Virulence

Assessing physical habitat structure and biological condition in eastern amazonia stream sites

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Water Biology and Security 2023年第2期2卷 23-31页

作者： Jady Vivia Almeida da Silva Santos Myllena Lima Josinete Sampaio Monteles daiany Larissa Ribeiro Carrera Ana Paula Justino de Faria Leandro Schlemmer Brasil Leandro Juen Faculdades de Ciencias Biologicas Instituto de Ciencias BiologicasUniversidade Federal do Para/Rua Augusto CorreiaNº1Bairro GuamaCEP66075-110BelemParaBrazil Laboratorio de Ecologia e Conservacao Universidade Federal do Para/Rua Augusto CorreiaNº1Bairro GuamaCEP66075-110BelemParaBrazil Programa de Pos-graduacao em Zoologia Universidade Federal do Para/Museu Paraense Emílio GoeldiRua Augusto CorreiaNº1Bairro GuamaCEP66075-110BelemParaBrazil Programa de Pos-graduacao em Ecologia Universidade Federal do Para e Embrapa Amazonia OrientalRua Augusto CorreiaNº1Bairro GuamaCEP66075-110BelemParaBrazil Programa de Pos-Graduacao em Agricultura e Ambiente Laboratorio de Ciencias Ambientais e BiodiversidadeUniversidade Estadual do MaranhaoSao LuísBrazil Instituto de Ciencias Biologicas e Saúde Universidade Federal do Mato GrossoCampus AraguaiaPontal do AraguaiaMato GrossoBrazil

The advance of agricultural frontiers and industrialization in amazonia has increased natural resource deterioration,resulting in degraded physical habitat structure and reduced local aquatic *** evaluated the relative sensitivities of the Biological Monitoring Working Party(BMWP)and Average Score Per Taxon(ASPT)biotic indexes based on EPT(Ephemeroptera,Plecoptera,Trichoptera)versus EPT taxa richness,EPT abundance,and Shannon-Wiener EPT diversity for evaluating anthropogenic impacts on amazonian *** expected that EPT-BMWP and EPT-ASPT would be more sensitive in detecting environmental changes on stream biota than the other *** sampled 32 stream sites in eastern amazonia distributed along an environmental gradient resulting from different land use *** the biological metrics except EPT-ASPT were significantly responsive to anthropogenic pressures;however,EPT taxa richness was slightly more responsive.

关键词： Land use Aquatic insects Biotic index Environmental monitoring

Physical habitat condition as a key tool to maintain freshwater biodiversity in neotropical artificial ponds

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Water Biology and Security 2023年第3期2卷 30-35页

作者： Marden S.Linares Livia B.dos Santos Marcos Callisto Jean C.Santos universidade federal de Minas Gerais Instituto de Ciencias BiologicasDepartamento de GeneticaEcologia e EvoluçaoLaboratorio de Ecologia de BentosAv.Antonio Carlos 6627CEP 31270-901PampulhaBelo HorizonteMGBrazil Laboratorio de Macroecologia e Conservaçao da Biodiversidade Departamento de Botanica e EcologiaUniversidade Federal do Mato GrossoAv.Fernando Correa da Costa2367Boa EsperançaCuiabaMato GrossoCEP 78060-900Brazil Programa de Pos-Graduaçao em Ciencias Ambientais Instituto de Ciencias NaturaisHumanas e SociaisUniversidade Federal do Mato GrossoAvenida Alexandre Ferronato1200SinopMTCEP 78550-728Brazil universidade federal de Sergipe Departamento de EcologiaCampus Sao Cristovao-Cidade Universitaria Prof.Jose Aloísio de CamposCEP 49100-000Sao CristovaoSergipeBrazil

In areas highly affected by anthropogenic disturbances,artificial(human-made)freshwater ecosystems can provide habitat for maintaining and conserving regional freshwater *** assessed how the physical habitat of artificial ponds affected the structure of benthic macroinvertebrate *** do so,we tested two hypotheses.(1)Physical habitat disturbances are not detrimental to the diversity of nearby artificial ponds,and(2)Physical habitat disturbances do not cause significant shifts in taxonomic *** results rejected both null hypotheses,i.e.,macroinvertebrate diversity metrics correlated significantly and positively with Physical Habitat Integrity index scores,and only sites with high habitat condition scores were significantly associated with sensitive indicator *** results highlight the importance of maintaining physical habitat conditions for sustaining the ecological health of artificial ponds.

关键词： Bioindicators Ecosystem management Lentic ecosystems