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Deposition of Ti-Based Thin Films on AISI 1020 Steel Substrates Using the Cathodic Cage Plasma Deposition Technique
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Silva, Raul Felipe Barros da

; Cardoso, Wandercleiton

; Gontijo, Leonardo Cabral

; Pimentel, Bruno Poubel

; Viana, Pedro Rupf Pereira

; Galdino, André Gustavo de Sousa

Materials Research

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2023, Volume 26 elocation e20230291

Abstract: En | Text: En | PDF: En

The automotive industry is one of the largest industrial segments in the world market. The exhaust system of motor vehicles is responsible for the emission and treatment of toxic gasses released by the engine. In this sense, the application of titanium on an AISI 1020 steel substrate was carried out by plasma deposition using a cathode cage. The aim of this research was to evaluate the application of this material in the exhaust system of motor vehicles. The samples were characterized by scanning electron microscopy (SEM), confocal microscopy (CM), microhardness tests and corrosion resistance tests. The samples exhibited a thin film with higher titanium content and hardness than the uncoated sample. The corrosion potential also increased and the current density was lower than the uncoated sample. The conclusion is that the deposition of thin titanium films on AISI 1020 steel with CCPD has the potential to produce thin films.

https://doi.org/10.1590/1980-5373-mr-2022-0291

A new species of Eremitis Döll (Poaceae, Bambusoideae) from the Baixo Jequitinhonha region, an area of extreme importance for the conservation of the flora of Minas Gerais, Brazil
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Ferreira, Fabrício Moreira

; Viana, Pedro L.

; Welker, Cassiano A. Dorneles

; Clark, Lynn G.

; Oliveira, Reyjane P.

Acta Botanica Brasilica

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2022, Volume 36 elocation e2021abb0030

Abstract: En | Text: En | PDF: En

ABSTRACT Eremitis is one of the three genera of the subtribe Parianinae (Poaceae, Bambusoideae, Olyreae) and is restricted to the Atlantic Forest in eastern Brazil. Eremitis aemula, herein described and illustrated, is microendemic to the Alto Cariri State Park, located in the Baixo Jequitinhonha region, an area considered to be extremely important for conservation of the flora in the state of Minas Gerais. This new species is morphologically similar to Eremitis jardimii and E. robusta. However, E. aemula is differentiated from both species mainly by its longer decumbent culms (47-50 cm long vs. 22-25 cm and (15-)25-28 cm, respectively) with shorter inflorescences (4.5-5 cm long vs. 5.5-6 cm and 6-6.5 cm, respectively), and by its leaf blades with rounded base (vs. attenuate in E. jardimii and E. robusta). The total number of bamboos in Minas Gerais thereby rises to 79 species with 16 endemic to the state, reinforcing the fact that the Baixo Jequitinhonha is of extreme importance to the conservation of the Minas Gerais flora.

https://doi.org/10.1590/0102-33062021abb0030

LEAF ANATOMY CHARACTERIZATION OF FOUR Apochloa SPECIES: A C3 GENUS RELATED TO EVOLUTION OF C4 PATHWAY IN GRASSES
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MENDONÇA, Ane Marcela das Chagas

; VIANA, Pedro Lage

; BARBOSA, João Paulo Rodrigues Alves Delfino

Acta Biológica Colombiana

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apr 2021, Volume 26 N. 1 Pages 12 - 18

Abstract: Es En | Text: Es En | PDF: Es | PDF: En

RESUMEN Las características de la anatomía de la hoja proporcionan evidencias importantes sobre la transición entre las vías C3 y C4. La fotosíntesis C4 surgió para reducir la tasa de fotorrespiración C3, concentrando el CO2 alrededor del sitio de la Rubisco y utilizando estructuras y maquinaria ya presentes en las plantas C3. En monocotiledóneas, se observa un alto número de linajes C4, la mayoría de ellas filogenéticamente relacionadas con grupos C3. El género C3 Apochloa, que pertenece a la subtribu Arthropogoninae, está relacionado con dos géneros C4 Coleataenia and Cyphonanthus. En este contexto, el objetivo fue evaluar cuatro especies de Apochloa para establecer las características anatómicas relacionadas con la evolución de la via C4 en este grupo. Se colectaron hojas completamente expandidas de A. euprepes, A. lorea, A. molinioides y A. poliophylla y se determinaron las características de las células del mesófilo (M) y del haz de la vaina (HV) a partir de secciones transversales de la hoja. Las especies presentaron una anatomía rústica de Kranz con células HV agrandadas y de distribución radial, con pocas organelas organizadas en posición centrífuga. Aunque las modificaciones de las células HV están probablemente relacionadas con el mantenimiento del estado hídrico de la planta, se puede inferir que facilitan el establecimiento de la fotosíntesis en los géneros C4 relacionados.

ABSTRACT Leaf anatomy characteristics provide important evidences about the transition between C3 and C4 pathways. The C4 photosynthesis pathway allowed to reduce the C3 photorespiratory rate, concentrating CO2 around the Rubisco site and using structures and machinery already presented in C3 plants. In monocots, it is observed a high number of C4 lineages, most of them phylogenetically related to C3 groups. The genus Apochloa (C3), subtribe Arthropogoninae, is related to two C4 genera Coleataenia and Cyphonanthus. The aim of this study was to evaluate four Apochloa species in order to establish anatomical characteristics related to the evolution of C4 pathway in this group. By means of transverse sections fully expanded leaves of A. euprepes, A. lorea, A. molinioides, and A. poliophylla were collected and the characteristics of the mesophyll (M) and bundle sheath (BS) cells were determined. These species showed a rustic Kranz anatomy with enlarged and radial arranged BS cells, which have few organelles organized in a centrifugal position. Although the modifications of BS cells are probably related to the maintenance of plant water status, we also discuss the evolution for the establishment of C4 photosynthesis in the related C4 genera.

https://doi.org/10.15446/abc.v26n1.83228 425 downloads

An overview of the Sixth International Conference on the Comparative Biology of Monocotyledons - Monocots VI - Natal, Brazil, 2018
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Versieux, Leonardo M.

; Calvente, Alice

; Carvalho, Fernanda Antunes

; Fonseca, Carlos Roberto

; Lichston, Juliana Espada

; Voigt, Eduardo

; Fontes, Anderson Lopes

; Roque, Alan

; Williams, Joseph Hill

; Oliveira, Reyjane Patrícia de

; Viana, Pedro Lage

; Mercier, Helenice

; Palma-Silva, Clarisse

; Wendt, Tânia

; Temponi, Lívia Godinho

; Andrade, Ivanilza Moreira de

; Oriani, Aline

; Leandro, Thales D.

; Pessoa, Edlley Max

; Martinelli, Adriana Pinheiro

; André, Thiago

; Benko-Iseppon, Ana Maria

; Berg, Cássio van den

; Luz, Cynthia Fernandes Pinto da

; Prosdocimi, Francisco

; Jardim, Jomar G.

; Alves, Marccus

; Wanderley, Maria das Graças Lapa

; Forzza, Rafaela Campostrini

; Scatena, Vera Lucia

; Clark, Lynn G.

Rodriguésia

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2021, Volume 72 elocation e00622019

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Resumo Neste artigo nós apresentamos uma visão geral dos resumos, programação científica e social, viagens de campo e informações acerca do número de inscritos, países participantes, patrocínios e temas tratados durante a Sexta Conferência Internacional sobre Biologia Comparada de Monocotiledôneas, realizada em Natal, Brasil, de 7 a 12 de outubro de 2018. Alguns comentários recebidos pelos organizadores e sugestões para os organizadores do próximo Monocots, na Costa Rica, também são fornecidos. Este artigo complementa os dados publicados no livro de resumos, disponível no Repositório Digital da UFRN.

Abstract In this paper we present an overview of the abstracts, scientific and social programs, field trips, and achievements in terms of participant number, represented countries, sponsorships, and themes treated during the Sixth International Conference on the Comparative Biology of Monocotyledons that took place in Natal, Brazil, October 7th -12th 2018. Some comments received by the organizers and a few suggestions for organizers of the next meeting, in Costa Rica, are also provided. The conference’s complete abstract book was published and provide additional information.

https://doi.org/10.1590/2175-7860202172035 395 downloads

Tansanal total mesorectal excision (TaTME): systematization and mediated results in 10 patients
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Neiva, Guilherme Inácio Bertoldo de Melo e Patriarca da Silva

; Soares, Fábio Alves

; Silva, Silvana Marques e

; Viana, Pedro Wilson Diniz

; Araújo Neto, Mário Nóbrega de

; Oliveira, Olane Marquez de

; Nascimento, Mauricio Cotrim

Journal of Coloproctology (Rio de Janeiro)

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mar 2020, Volume 40 N. 1 Pages 50 - 55

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Resumo Contexto A excisão total do mesorreto por via transanal é uma aborgadem crânio-caudal para a realização de ressecção minimamente invasiva do reto e tecidos perirretais em monobloco. É adequada para pacientes com câncer de reto médio e distal confinados ao envelope mesorretal. Aqui relatamos uma série de pacientes submetidos à excisão total do mesorreto por via transanal. Métodos Dez pacientes foram selecionados para serem submetidos à excisão total do mesorreto por via transanal utilizando a plataforma SILS-Port®. Todos os pacientes eram portadores de câncer retal de localização extraperitoneal. O acesso abdominal para mobilização do cólon proximal, em todos os casos, foi realizado por laparoscopia. Como regra, a retirada do espécime cirúrgico, em nove casos, ocorreu por via transanal. Resultados Durante um período de 41 meses, 10 pacientes foram submetidos à excisão total do mesorreto por via transanal com intenção curativa. A indicação primária para excisão total do mesorreto transanal foi o câncer de reto médio e distal, localmente invasor, mas confinado ao envelope mesorretal. A mediana de idade dos pacientes com câncer de reto no momento da cirurgia foi de 61 anos (média de 59,4 anos, faixa de 22‒78 anos), sendo 80% (8) do sexo feminino e 20% (2) do sexo masculino. A mediana do tempo cirúrgico foi de 305’ (média de 314’, intervalo de 260‒420’). A mediana do tempo de permanência pós-operatória foi de cinco dias (média de 7,3 dias, intervalo de 3‒23 dias). Não houve mortalidade pós-operatória. As complicações cirúrgicas incluíram íleo paralítico (n = 1), paresia vesical (n = 1) e estenose de ileostomia (n = 1). Todos os pacientes tiveram margens cirúrgicas negativas para neoplasia e mais de 12 linfonodos ressecados. Os tumores distavam de 1 a 9 cm da margem anal. Conclusão A excisão total do mesorreto transanal demonstrou-se um método viável para a ressecção oncológica de câncer de reto localmente avançado com intenção curativa.

Abstract Background Transanal total mesorectal excision is a surgical technique for minimally invasive resection of the rectum and perirectal tissues. It is indicated for patients with medial and distal rectum cancer confined to the mesorectal envelope. This study describes a series of patients undergoing transanal total mesorectal excision. Methods Ten patients were selected to undergo transanal total mesorectal excision using the SILS-Port® platform. All patients included here had middle or low rectal cancer. Abdominal access for proximal colon mobilization was performed by laparoscopy in all cases. As a rule, in 9 of the 10 cases, the surgical specimen was removed transanally. Results During a 41-month period, 10 patients underwent transanal total mesorectal excision based on curative intent. The first indication for transanal total mesorectum excision was medial and distal rectal cancer, locally invasive and confined to the mesortal envelope. The median age of patients with rectal cancer at the time of surgery was 61 years (mean 59.4 years, range 22–78 years), with 80% (8) female and 20% (2) male. The median surgical time was 305′ (mean 314′, range 260‒420′). The median postoperative length of stay was five days (average of 7.3 days, interval of 3–23 days). There was no postoperative mortality. Surgical complications included postoperative ileus (n = 1), bladder paresis (n = 1), and ileostomy stenosis (n = 1). All patients had negative surgical margins for neoplasia and more than 12 resected lymph nodes. The tumors were between 1 and 9 cm from the anal margin. Conclusion Total transanal mesorectal excision has been shown to be a viable method for oncologic resection of locally advanced rectal cancer with curative intent.

https://doi.org/10.1016/j.jcol.2019.09.004 695 downloads

Vascular flora of Lençóis Maranhenses National Park, Maranhão State, Brazil: checklist, floristic affinities and phytophysiognomies of restingas in the municipality of Barreirinhas
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Rodrigues, Misael Lira

; Mota, Nara Furtado de Oliveira

; Viana, Pedro Lage

; Koch, Ana Kelly

; Secco, Ricardo de S.

Acta Botanica Brasilica

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sep 2019, Volume 33 N. 3 Pages 498 - 516

Abstract: En | Text: En | PDF: En

ABSTRACT This study presents a floristic survey of the vascular plants of restingas of Lençóis Maranheses National Park, in the municipality of Barreirinhas, Maranhão, Brazil, including descriptions of the principal phytophysiognomies and similarity analyses including other restinga areas in North and Northeastern Brazil. Samples from the study area deposited in the herbaria MG, IAN and MAR were inventoried and fieldwork for the collection of additional botanical samples was undertaken between September 2015 and August 2017. Unweighted pair group method with arithmetic mean (UPGMA) using Jaccard index was used to calculate the similarity among floras of the restingas of the states of Pará, Piauí, Ceará and Maranhão. A total of 289 species in 189 genera and 73 families was recorded, including 56 new occurence records for the state of Maranhão. The richest families were Poaceae, Cyperaceae, Fabaceae, Rubiaceae, Eriocaulaceae and Myrtaceae. Similarity indexes revealed low similarity among the selected areas, suggesting high floristic identity for each area, as well as possible collection bias among the areas.

https://doi.org/10.1590/0102-33062018abb0421 1574 downloads

Cangas da Amazônia: a vegetação única de Carajás evidenciada pela lista de fanerógamas
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Mota, Nara Furtado de Oliveira

; Watanabe, Mauricio Takashi Coutinho

; Zappi, Daniela Cristina

; Hiura, Alice Lima

; Pallos, Julieta

; Viveros, Raquel Stauffer

; Giulietti, Ana Maria

; Viana, Pedro Lage

Rodriguésia

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sep 2018, Volume 69 N. 3 Pages 1435 - 1488

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Resumo Nas cangas da Floresta Nacional (FLONA) de Carajás e no Parque Nacional dos Campos Ferruginosos (PNCF) foram registradas 856 espécies, distribuídas em 116 famílias de fanerógamas. As famílias mais ricas foram Poaceae (86), Fabaceae (65) e Rubiaceae (46). O hábito herbáceo foi o melhor representado. Dois gêneros, 24 espécies e uma subespécie são apontadas como endêmicas das cangas da área de estudos. Na FLONA de Carajás, a Serra Norte, com maior amostragem, possui 659 espécies de fanerógamas e na Serra Sul foram registradas 545 espécies. Aproximadamente 60% das espécies documentadas na área de estudos, incluindo espécies endêmicas, não possuem registro para o PNCF. Através da lista taxonômica aqui apresentada, foi possível demonstrar considerável distinção entre as cangas da Serra dos Carajás e as do Quadrilátero Ferrífero, em Minas Gerais, apontando também pouca correspondência dessas duas listas com a canga de Corumbá, no Mato Grosso do Sul. A riqueza e singularidade da flora da região, que inclui diversas espécies endêmicas, associada à ameaça a que estão submetidos estes ambientes por atividades de mineração, apontam para a necessidade de um planejamento para conservação das espécies da flora das cangas de Carajás.

Abstract The Floresta Nacional de Carajás (FLONA of Carajás) and the Parque Nacional dos Campos Ferruginosos (PNCF) are home to canga vegetation where 856 species distributed in 116 families of seed plants were recorded. The richest families were Poaceae (86), Fabaceae (65) and Rubiaceae (46) and the best represented habit was herbaceous. Two genera, 24 species and one subspecies are considered endemic from the canga of the studied area. Within the FLONA of Carajás, the Serra Norte was the best sampled site, and is home for 659 species of seed plants, while 545 species were recorded for the Serra Sul. Approximately 60% of the species documented, including the endemics, have no record within the PNCF. Through the taxonomic list here presented, it was possible to demonstrate considerable distinction between the canga of the Serra dos Carajás and the same formation in the Quadrilátero Ferrífero, in Minas Gerais, with little correspondence between these two lists and the one from Corumbá, Mato Grosso do Sul state. The richness and singularity of the regional flora, which includes many endemisms, associated to the current threats to these environments due to mineral exploration, point to the need for careful and consistent planning to ensure the conservation of the flora of the canga of Carajás.

https://doi.org/10.1590/2175-7860201869336 4231 downloads

Flora das cangas da Serra dos Carajás, Pará, Brasil: Poaceae
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Viana, Pedro Lage

; Rocha, Antônio Elielson Sousa da

; Silva, Christian

; Afonso, Edgar Augusto Lobato

; Oliveira, Reyjane Patrícia

; Oliveira, Regina Célia

Rodriguésia

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sep 2018, Volume 69 N. 3 Pages 1311 - 1368

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Resumo Este trabalho apresenta um tratamento taxonômico para a família Poaceae nas cangas das Serra dos Carajás, Pará, Brasil. O artigo foi preparado de acordo com o escopo do projeto Flora das Cangas da Serra dos Carajás, com base no estudo de espécimes dos herbários BHCB, MG e UB. Foram levantadas 87 espécies, pertencentes a 37 gêneros. Dessas, Axonopus carajasensis, Paspalum cangarum, P. carajasense e Sporobolus multiramosus são consideradas endêmicas das cangas de Carajás; duas espécies novas estão em fase de publicação (uma de Paspalum e uma de Hildaea); e uma espécie de Trichanthecium está em estudo para determinar sua identidade taxonômica. Seis espécies são registradas no estado do Pará pela priemira vez. São fornecidas descrições morfológicas, chaves de identificação, ilustrações das espiguetas, pranchas fotográficas, distribuição geográfica e comentários para as espécies tratadas.

Abstract This work presents a taxonomic treatment for the Poaceae in the canga of the Serra dos Carajás, Pará state, Brazil. The article was prepared according to the guidelines of the project Flora of the canga of the Serra dos Carajás, based on the study of the specimens from the herbaria BHCB, MG and UB. A total of 87 species belonging to 37 genera were inventoried. Among these, Axonopus carajasensis, Paspalum cangarum, P. carajasense and Sporobolus multiramosus are considered endemic to the canga of the Serra dos Carajas; two new species are to be published soon (one of Paspalum and one of Hildaea); and one species of Trichanthecium is under study to determine its taxonomic identity. Six species are recorded for the first time in Pará state. Morphological descriptions, identification keys, illustration of the spikelets, photo plates, detailed geographic distribution and diagnostic comments are provided for all species treated.

https://doi.org/10.1590/2175-7860201869330 2338 downloads

Flora das cangas de Carajás: taxonomia preparando novos caminhos
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Viana, Pedro Lage

; Giulietti-Harley, Ana Maria

Rodriguésia

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sep 2018, Volume 69 N. 3 Pages i - ii

Abstract: Pt | Text: Pt | PDF: Pt

https://doi.org/10.1590/2175-7860201869300 992 downloads

10.

Brazilian legislation on genetic heritage harms Biodiversity Convention goals and threatens basic biology research and education
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ALVES, RUY JOSÉ V.

; WEKSLER, MARCELO

; OLIVEIRA, JOÃO A.

; BUCKUP, PAULO A.

; POMBAL JR., JOSÉ P.

; SANTANA, HÉLCIO R.G.

; PERACCHI, ADRIANO LÚCIO

; KELLNER, ALEXANDER W.A.

; ALEIXO, ALEXANDRE

; LANGGUTH, ALFREDO

; ALMEIDA, ALZIRA MARIA P. DE

; ALBERNAZ, ANA LUISA

; RIBAS, CAMILA C.

; ZILBERBERG, CARLA

; GRELLE, CARLOS EDUARDO V.

; ROCHA, CARLOS F.D.

; LAMAS, CARLOS JOSÉ E.

; HADDAD, CÉLIO F.B.

; BONVICINO, CIBELE R.

; PRADO, CYNTHIA P.A.

; LIMA, DANIELA O. DE

; ROSSA-FERES, DENISE C.

; SANTOS, FABRÍCIO R. DOS

; SALIMENA, FÁTIMA REGINA G.

; PERINI, FERNANDO A.

; BOCKMANN, FLÁVIO A.

; FRANCO, FRANCISCO LUÍS

; GIUDICE, GISELE M.L. DEL

; COLLI, GUARINO R.

; VIEIRA, IMA CÉLIA G.

; MARINHO-FILHO, JADER

; WERNECK, JANE M.C.F.

; SANTOS, JORGE A.D. DOS

; NASCIMENTO, JORGE LUIZ DO

; NESSIMIAN, JORGE LUIZ

; CORDEIRO, JOSÉ LUIS P.

; CLARO, KLEBER DEL

; SALLES, LEANDRO O.

; CASATTI, LILIAN

; PY-DANIEL, LUCIA HELENA R.

; SILVEIRA, LUÍS FÁBIO

; TOLEDO, LUÍS FELIPE

; OLIVEIRA, LUIZ F. DE

; MALABARBA, LUIZ ROBERTO

; SILVA, MARCELO D. DA

; COURI, MÁRCIA S.

; MARTINS, MÁRCIO

; TAVARES, MARCOS D.S.

; SOBRAL, MARCOS EDUARDO G.

; VIEIRA, MARCUS VINÍCIUS

; OLIVEIRA, MARIA DE LOURDES A.

; PINNA, MÁRIO DE

; HOPKINS, MICHAEL J.G.

; SOLÉ, MIRCO

; MENEZES, NAÉRCIO A.

; PASSOS, PAULO

; D’ANDREA, PAULO SERGIO

; PINTO, PEDRO C.E.A.

; VIANA, PEDRO L.

; TOLEDO, PETER M.

; REIS, ROBERTO E.

; VILELA, ROBERTO

; BASTOS, ROGÉRIO P.

; COLLEVATTI, ROSANE G.

; CERQUEIRA, RUI

; CASTROVIEJO-FISHER, SANTIAGO

; CARAMASCHI, ULISSES

Anais da Academia Brasileira de Ciências

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apr 2018, Volume 90 N. 2 Pages 1279 - 1284

Abstract: En | Text: En | PDF: En

https://doi.org/10.1590/0001-3765201820180460 7311 downloads

11.

Flora das cangas da Serra dos Carajás, Pará, Brasil: Sapindaceae
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Barbosa, Camilo Veríssimo de Oliveira

; Coelho, Rubens Luiz Gayoso

; Viana, Pedro Lage

Rodriguésia

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mar 2018, Volume 69 N. 1 Pages 229 - 239

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Resumo O presente estudo consiste em um tratamento florístico das espécies de Sapindaceae nas cangas da Serra dos Carajás, Pará, Brasil. São apresentadas chave de identificação, descrições morfológicas, ilustrações, distribuição geográfica e comentários taxonômicos das espécies. A família é representada na área por três gêneros e 11 espécies: Allophylus latifolius, A. racemosus, A. semidentatus, A. strictus, Matayba guianensis, M. inelegans, M. spruceana, Serjania confertiflora, S. caracasana, S. fuscifolia e S. lethalis, sendo A. semidentatus e S. lethalis novas ocorrências para o estado do Pará.

Abstract This study consists of a floristic survey of the Sapindaceae species in the iron rock outcrops of the Serra dos Carajás, Pará, Brazil. Identification keys, morphological descriptions, illustrations, geographical distribution and taxonomic comments are provided for the species. The family is represented by three genera and 11 species: Allophylus latifolius, A. racemosus, A. semidentatus, A. strictus, Matayba guianensis, M. inelegans, M. spruceana, S. confertiflora, S. caracasana, S. fuscifolia e S. lethalis, with A. semidentatus and S. lethalis being new occurrences for the state of Pará.

https://doi.org/10.1590/2175-7860201869121 924 downloads

12.

Flora das cangas da Serra dos Carajás, Pará, Brasil: Cannabaceae
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Viana, Pedro Lage

; Gil, André dos Santos Bragança

Rodriguésia

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mar 2018, Volume 69 N. 1 Pages 49 - 51

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Resumo A família Cannabaceae é representada nas cangas da Serra dos Carajás por uma espécie, Trema micrantha. A espécie é frequente nas formações florestais da região, e foi registrada em canga e áreas de transição, com capões de mata associados. O presente estudo contém descrições morfológicas, ilustrações, dados de distribuição geográfica e comentários taxonômicos para a espécie tratada.

Abstract The family Cannabaceae is represented in the canga of Serra dos Carajás by one species, Trema micrantha. The species is common in the forests of the region and was recorded in canga and in transitional areas with associated forest patches. This study brings morphological description, illustration, geographical distribution and taxonomic comments for the species treated.

https://doi.org/10.1590/2175-7860201869105 1645 downloads

13.

Floristic and ecological characterization of habitat types on an inselberg in Minas Gerais, southeastern Brazil
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Paula, Luiza F. A. de

; Mota, Nara F. O.

; Viana, Pedro L.

; Stehmann, João R.

Acta Botanica Brasilica

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jun 2017, Volume 31 N. 2 Pages 199 - 211

Abstract: En | Text: En | PDF: En

ABSTRACT Inselbergs are granitic or gneissic rock outcrops, distributed mainly in tropical and subtropical regions. They are considered terrestrial islands because of their strong spatial and ecological isolation, thus harboring a set of distinct plant communities that differ from the surrounding matrix. In Brazil, inselbergs scattered in the Atlantic Forest contain unusually high levels of plant species richness and endemism. This study aimed to inventory species of vascular plants and to describe the main habitat types found on an inselberg located in the state of Minas Gerais, in southeastern Brazil. A total of 89 species of vascular plants were recorded (belonging to 37 families), of which six were new to science. The richest family was Bromeliaceae (10 spp.), followed by Cyperaceae (seven spp.), Orchidaceae and Poaceae (six spp. each). Life forms were distributed in different proportions between habitats, which suggested distinct microenvironments on the inselberg. In general, habitats under similar environmental stress shared common species and life-form proportions. We argue that floristic inventories are still necessary for the development of conservation strategies and management of the unique vegetation on inselbergs in Brazil.

https://doi.org/10.1590/0102-33062016abb0409 2097 downloads

14.

ESPÉCIES VEGETAIS POTENCIAIS PARA RECUPERAÇÃO DE ÁREAS SOB A INFLUÊNCIA DA MINERAÇÃO DE BAUXITA EM CAMPOS DE ALTITUDE NA REGIÃO DE POÇOS DE CALDAS - MG
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Nascimento, Gleisson de Oliveira

; Pereira, José Aldo Alves

; Barros, Dalmo Arantes

; Viana, Pedro Lage

; Carvalho, Warley Augusto Caldas

; Garcia, Paulo Oswaldo

; Ferreira, Josimar Batista

Ciência Florestal

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mar 2017, Volume 27 N. 1 Pages 85 - 96

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

RESUMO O objetivo deste trabalho foi realizar um levantamento das principais espécies provenientes de propágulos na camada superficial do solo sobre minas de bauxita, em "Campos de Altitude de Mata Atlântica", como forma de sugerir espécies potenciais para recuperação de áreas degradadas. Foram realizadas amostragens dos cinco primeiros centímetros de substratos contendo o material propagativo da área. As amostras foram acompanhadas em viveiro e realizou-se a contagem da emergência de plantas a cada 24 horas, sendo identificados os indivíduos no final do experimento. Foram calculados os índices de abundância e diversidade. Neste estudo, três das espécies de maior ocorrência foram comuns nos dois períodos (seco e chuvoso): Ageratum fastigiatum, Echinolaena inflexa e Borreria latifolia. O valor do Índice de Shannon (H') encontrado para as espécies provenientes da camada superficial do solo em vegetação de "Campos de Altitude de Mata Atlântica" no período seco correspondeu a 2,79 nats.ind-1 e 2,23 nats.ind-1 no período chuvoso. Já a equabilidade de Pielou (J') observada para o período seco foi igual a 0,72 e 0,63 para o período chuvoso. A similaridade entre os dois períodos foi de 0,36. Comparando a variável resposta, número de indivíduos entre os dois períodos, identificou-se diferença estatística com maior média para o período seco. De acordo com as condições que este trabalho foi realizado, é possível afirmar que existem espécies com potencial para recuperação de áreas mineradas em vegetação de Campos de Altitude. Portanto, sugere-se que sejam realizados estudos complementares de ecologia dessas espécies e de tecnologia de sementes como forma de fundamentar a aplicação desses conhecimentos em práticas de recuperação de áreas mineradas.

ABSTRACT The objective of this work was to perform a survey of the main species derived from the propagules present on the topsoil over bauxite mines in "Altitude Fields in Atlantic Forest", as a form to suggest potential species for recovering degraded areas. Samples were taken from the first five centimeters of substrate containing the area propagative material. The samples were housed in a nursery where we counted the plant emergences every 24 hours, identifying the individuals at the end. The abundance and diversity indexes were calculated. In this study, three of the higher occurrence species were common in both periods (dry and rainy): Ageratum fastigiatum, Echinolaena inflexa and Borreria latifolia. The value found for the Shannon Index (H') for the species derived from propagules on the topsoil in vegetation in the altitude fields in Atlantic Forest during the dry period were of 2.79 nats.ind-1 and during the rainy period was of 2.23 nats.ind-1. Pielou's equability observed for the dry period was of 0.72 and for the rainy period was of 0.63. The similarity between both periods was of 0.36. Comparing the response variable number of individuals between both periods, we identified a statistical difference with a larger mean for the dry period. According to the conditions this work was performed in, it is possible to ascertain that there are species with potential to recover mined areas in vegetation in altitude fields. Therefore, we suggest that ecology complementary studies are performed on these species and seed technology as a way to fundament the application of this knowledge in mined area recovery practices.

https://doi.org/10.5902/1980509826449 1731 downloads

15.

Occurrence of leucism in Eira barbara (Carnivora, Mustelidae) in Brazil
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Talamoni, Sonia

; Viana, Pedro Igor Macario

; Costa, Claudia Guimarães

; Palú, Lauro

; Oliveira, Raphaela Barcelos

; Pessôa, Leila Maria

Biota Neotropica

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2017, Volume 17 N. 3 elocation e20170328

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Resumo A ocorrência de coloração anômala (albinismo, leucísmo e melanismo) em mamíferos é um fenômeno raro na natureza, mas ela tem sido relatada para diversas espécies. Neste trabalho nós relatamos a ocorrência de leucísmo em Eira barbara por meio do exame de três indivíduos encontrados mortos atropelados por veículos e pela visualização direta de indivíduos vivos na Reserva Particular do Patrimônio Natural Santuário do Caraça, sudeste brasileiro. Em adição, nós consultamos coleções de mamíferos em museus do Brasil e dos Estados Unidos da América. Os animais encontrados mortos e os avistados apresentavam pelagem amarela esbranquiçada no corpo e na cabeça, resultando em uma coloração muito mais clara que o padrão de coloração comumente observado em iraras. Apesar deste padrão de coloração mais claro, os espécimes apresentavam partes do tecido mole, tais como a íris e a pele, com pigmentação muito semelhante àquela presente em indivíduos com padrão de coloração típico da espécie. Este conjunto de fatores indicou que os espécimes registrados eram de fato leucísticos e não albinos. Dentre os espécimes examinados nas coleções científicas, nós encontramos nove indivíduos de diferentes localidades que apresentavam o padrão de coloração esbranquiçado. Alguns estudos atribuem a frequência elevada de casos de leucísmo a pequenas populações e / ou com algum mecanismo de isolamento reprodutivo. Dessa forma, análises da variabilidade genética de populações contendo indivíduos com essas características devem ser consideradas. Por outro lado, a ocorrência de fenótipos de coloração polimórficos em iraras indica que hipóteses podem ser testadas tanto com relação à fixação de caraterísticas recessivas, quanto sobre possíveis vantagens adaptativas ambientais desses fenótipos.

Abstract The occurrence of anomalous coloration (albinism, leucism and melanism) in mammals is a rare phenomenon in nature, but this phenomenon has been reported for several species of mammals. In this study, we report on the occurrence of leucism in Eira barbara by examining three road-killed individuals and two sightings of live animals in Reserva Particular do Patrimônio Natural Santuário do Caraça, southeastern Brazil. In addition, we examined tayra specimens housed in mammal collections from Brazil and USA. The animals found dead and those sighted had a whitish yellow fur on the body and head, resulting in lighter coloration than the coloring pattern commonly observed in tayras. Despite these lighter color pattern, the specimens showed parts of soft tissue, such as iris and the skin, with pigmentation very similar to that present in individuals with the typical color pattern. This set of factors indicates the specimens recorded were in fact leucistic and not albino. Among the specimens examined in the scientific collections, we found nine individuals from different localities that presented the whitish yellow color pattern. Some studies attribute the higher frequency of cases of leucism due to small populations and / or with some mechanism of reproductive isolation. Thus, analysis of the genetic variability of populations containing individuals with such characteristics should be considered. On the other hand, the occurrence of polymorphic color phenotype in tayras indicates that hypotheses related to the fixation of recessive characteristics, or on possible environmental adaptive advantages of these phenotypes can be tested.

https://doi.org/10.1590/1676-0611-bn-2017-0328 1485 downloads

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