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| Registros recuperados: 24 | |
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| Prance,Ghillean T.; Silva,Marlene Freitas da; Albuquerque,Byron Wilson; Araújo,Izonete de Jesus da Silva; Carreira,Léa Maria Medeiros; Braga,Marilene Marinho Nogueira; Macedo,Miramy; Conceição,Pedro Nonato da; Lisbôa,Pedro Luiz Braga; Braga,Pedro Ivo; Lisbôa,Regina Célia Lobato; Vilhena,Raimunda Conceição Queiroz. |
| Resumo Estudo das Rhizophoraceas da Amazônia abrangendo 5 gêneros: Rhizophora, Cassipourea, Sterigmapetalum, Polygonanthus e Anisophyllea. Doze espécies dos referidos gêneros são estudadas e descritas. Novos taxa não foram encontrados, porém, diversos nomes foram colocados em sinonímia. Apresentada a descrição do pólen de algumas espécies. |
| Ano: 1975 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671975000100005 |
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| Prance,Ghillean T.. |
| Resumo Há muita confusão na literatura botânica sobre a terminologia empregada para os tipos de mata inundada temporária ou permanentemente. É necessário criar uma terminologia mais correta em termos de cobertura vegetacional, tipo de água e duração da alagação. No Brasil, os termos várzea e igapó e Tahuampa, no Peru, têm sido atribuídos a tipos muito diferentes de mata pelos ecologistas e cientistas de outras disciplinas e até agora não têm definição correta. Neste trabalho, é tentado classificar as categorias principais de vegetação inundável. |
| Ano: 1980 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671980000300499 |
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| Prance,Ghillean T.. |
| Abstract This paper is the third in a series of additional publications on the plant family Chrysobalanaceae. The new species Couepia marlenei Prance, and subspecies Licania octandra (Hoffmgg. ex Roem. & Schult.) Kuntze subsp. grandifolia are described. Notes on additional collections of five other species are given. Two of these were previously known only from the types. Licania affnis Fritsch, a species well-known in the Guianas and eastern Amazonia is shown to have a disjunct distribution, since it has now been collected in Panama. |
| Ano: 1974 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671974000100017 |
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| Prance,Ghillean T.. |
| Abstract In 1972 the author described the new species Acioa edulis (Chrysobalanaceae) to name the Castanha de cutia, a plant which is economically important because of its edible fruit. The original description was based on fruiting material only. Recently collected flowering material has shown that the original generic assignment was incorrect, and so it is now transferred to Couepia the correct genus, and the flowers are described for the first time. |
| Ano: 1975 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671975000200143 |
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| Keel,Shirley H. Kuo; Prance,Ghillean T.. |
| Summary The vegetation analysis of a Central Amazonian igapó, a forest under severe environmental stress — poor soil and seasonal flooding, reveals the existence of the dominant species Myrciaria dubia with a M.I.V. 75. The Shannon diversity index of this forest is 4.358 bits per individual, of which 75.73% is attributable to the evenness value. Species distributions change along the moisture gradient. Though many species exhibit the tendency of zonal distribution, the boundaries of zones are not abrupt. The authors suggest that species distribution is the result of physiological difference to flood tolerance. Further research should be directed to the comparison of flood tolerance of the plants which occur in the following three areas: permanent... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1979 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671979000700645 |
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| Prance,Ghillean T.. |
| SUMMARY Five new taxa of Amazonian Chrysobalanaceae are described based on recently collected material: Couepia cidiana Prance, Hirtella radamii Prance, Licania heteromorpha Benth. var. revoluta Prance, Licania miltonii Prance, and Licania tocantina Prance. The continued collection of many undescribed taxa indicates that there is still much to be done in the basic botanical inventory of Amazonia. |
| Ano: 1983 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671983000100021 |
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| Prance,Ghillean T.. |
| Abstract In recent years it has generally been accepted that Amazonia was subject to long dry periods in the late Pleistocene and post-Pleistocene which induced forest cover to a few limited areas or refuges. It has been proposed that the subsequent genetic isolation into separate populations is a mnjor factor in the evolution of the species diversity within the lowland forest of Amazonia. Most of the previous evidence for this theory is based on studies of animals, for example: lizards, butterflies, and birds. Here data are presented to confirm the theory of forest refuges using evidence from phytogeography. Distribution patterns of the lowland species of the woody plant families Caryocaraceae, Chrysobalanaceae, Dichapetalaceae and Lecythidaceae are... |
| Ano: 1973 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671973000300005 |
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| Prance,Ghillean T.; Schubart,Herbert O. R.. |
| Summary The origins of the open areas of white sand campinas of the lower rio Negro is discussed. Campinas are compared with the denser campina forests or caatingas of the upper rio Negro. It is concluded that the campinas are areas of white sand forest cleared by Indians. Evidence from pottery shards and radiocarbon dating of charcoal deposited in the soil demonstrates that the campinas were occupied by Indians of the Guarita subtradition around 800 A.D. The open campina areas show a gradual sucession to more closed type of campina to campina forest, the climax on the white sand. Recolonization after Indian clearing is extremely slow on white sand because of limiting factors such as nutrients and excessive drainage in the dry season. |
| Ano: 1977 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671977000400567 |
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| Prance,Ghillean T.. |
| Abstract Four new species of Licania and two of Hirtella are described and additional notes are given on three other little known species of Chrysobalanaceae. All the new species have been collected recently since 1972 when the author monographed the neotropical Chrysobalanaceae. Three of the new species are from Amazonia, two from Panama, and one from Pacific coastal Colombia confirming that these three areas still have many undescribed species and are in need of further exploration. |
| Ano: 1978 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671978000400577 |
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| Prance,Ghillean T.; Nelson,Bruce W.; Silva,MarIene Freitas da; Daly,Douglas C.. |
| A review of the history and results of the first eight years of fieldwork of Projeto Flora Amazônica is given. This binational plant collecting program, sponsored by the Conselho Nacional de Desenvolvimento Científico e Tecnológico and the National Science Foundation, has mounted 25 expeditions to many parts of Brazilian Amazonia. Expeditions have visited both areas threatened with destruction of the forest and remote areas previously unknown botanically. The results have included the collection of 32,976 members of vascular plants, 16, 482 of cryptogams, as well as quantitative inventory of 18.67 hectares of forest with the collection of 7,294*** numbers of sterile vouncher collections. The non-inventory collections have been made in replicate sets of... |
| Ano: 1984 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671984000300005 |
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| Absy,Maria Lúcia; Prance,Ghillean T.; Barbosa,Edelcílio Marques. |
| Foi feito um inventário de seis hectares de floresta de. terra firme na área de influência da Estrada Cuiabá-Porto Velho (BR-364). Destes seis hectares, dois foram feitos no Município de Jaru, vicinal 605 e quatro na área do Projeto Machadinho, vicinais MC-2, MA-9. A flonesta apresenta uma altura média de 15m e um total de 278 espécies diferentes, representadas por 2.235 indivíduos e 57 famílias nos seis hectares estudados. Os hectares I e II do Município de Jaru apresentaram, respectivamente, uma diversidade florística de 113 e 136 espécies de 10cm ou mais de diâmetro (DAP), enquanto que os hectares III, IV, V e VI da área do Projeto Machadinho apresentaram respectivamente, 103, 115, 122 e. 121 espécies. A espécie mais importante no hectare I é o breu... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1987 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671987000200085 |
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| Hill,Robert J.; Prance,Ghillean T.; Mori,Scott A.; Steward,William C.; Shimabukuru,Darcy; Bernardi,João. |
| Resumo Ao longo de um trecho de 2.174 km do rio Solimões, partindo de Iquitos. Peru, a Manaus, Brasil, foi realizado um estudo eletroforético para determinação da quantidade de variação genética em três taxa de leguminosas (Aeschynomene sensitiva Sw. var. amazonica Rudd, Papilionoideae; Mimosa Pigra L., Mimosoideae). A variabilidade genética foi expressa em termos de: 1) grau de polimorfismo enzimático (P'), e 2) heterozigosidade populacional média (H'). Foram examinados cinco sistemas enzimáticos: leucina-aminopeptidase (LAP), glutamato-dehidrogenase (GDH). fosfoglucomutase (PGM), fosfoglucoisomerase (PGI), e fosfatase ácida (AcPH). Os taxa ribeirinhos apresentam condições excepcionais para estudos experimentais sobre biologia de população e evolução. A... |
| Ano: 1978 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671978000200183 |
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| Prance,Ghillean T.; Arias,Jorge R.. |
| Abstract A field study of the floral biology of Victoria amazonica (Poepp.) Sowerby (Nymphaeaceae) was made for comparison with the many studies made in cultivated plants, of Victoria in the past. In the study areas in the vicinity of Manaus, four species of Dynastid beetles were found in flowers of V. amazonica, three of the genus Cyclocephala and one of Ligyrus. The commonest species of beetle proved to be a new species of Cyclocephala and was found in over 90 percent of the flowers studied. The flowers of V. amazonica attract beetles by their odour and their white colour on the first day that they open. The beetles are trapped in the flower for twenty-four hours and feed on the starchy carpellary appendages. Observations were made of flower temperature,... |
| Ano: 1975 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671975000200109 |
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| Prance,Ghillean T.; Anderson,Anthony B.. |
| Abstract A field study of the floral biology of two species of Nymphaea (Nymphaeaceae) wp.s made. N. rudgeana G.F.W. Meyer, a night flowering species, was studied around Manaus and Belém. It is visited by the scarab beetle Cyclocephala castanea Oliv. in the Manaus vicinity and by C. verticalis Burm. in the Belém vicinity. N. rudgeana is protogynous and cross-pollination is quite frequent. N. ampla (Salisb.) DC., a day flowering species, was studied near Salvador, Bahia. This species is visited by the bee species Trigona spinipes. N. ampla is not protogynous and is largely self-fertilized, although a small amount of cross-fertilization may occur through the activity of the Trígona bees. |
| Ano: 1976 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671976000200163 |
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| Prance,Ghillean T.. |
| RESUMO Um resumo da história taxonômica do gênero Victoria Lindl. é apresentado. É mostrado que a espécie freqüentemente chamada Victoria regia Lindl., em verdade deve ser chamada Victoria amazonica (Poeppig) Sowerby. Embora Sowerby tenha feito a nova combinação nomenclatural no ano de 1850, o nome correto é ainda pouco usado. Espera o autor que o trabalho chame a atenção para a nomenclatura e estimule o uso do nome correto — Victoria amazonica. |
| Ano: 1974 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671974000300005 |
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| Prance,Ghillean T.. |
| Abstract The Lecythidaceae of a 2500 m2 area of the secondary forest of INPA was studied. The 97 individuals of Lecythidaceae present indicated a high number of primary forest species. It is concluded that most of the area was not burnt when the original forest was cut, and the regeneration of primary forest species is much greater in areas which are not burnt over after felling. This is further supported by parallel studies of Bignoniaceae and Meliaceae of the same area. |
| Ano: 1975 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671975000300261 |
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| Registros recuperados: 24 | |
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