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Registros recuperados: 13
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A new dwarf species, new distribution records, and supplementary descriptive notes of the centipede genus Ityphilus Cook, 1899 (Chilopoda: Geophilomorpha: Ballophilidae) from central Amazonia, Brazil Pap. Avulsos de Zool. (São Paulo)
Pereira,Luis Alberto.
A new dwarf species of the centipede genus Ityphilus Cook, 1899, named I. donatellae sp. nov. (Chilopoda: Geophilomorpha: Ballophilidae) is hereby proposed on the basis of specimens from the vicinity of Manaus, Central Amazonia (Brazil), previously identified as Ityphilus calinus Chamberlin, 1957 (hereby designated holotype female, paratype male and paratype female). Supplementary morphological data and new illustrations are provided after this type material. The new species, characterized by having the internal edge of the forcipular tarsungulum serrate, is herein included in a key that will enable the identification of the 10 other Neotropical members of the genus Ityphilus sharing the same trait. New distribution records and supplementary descriptive...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ityphilus; Taxonomy; New species; New distribution records; Central Amazonia; Brazil; Geophilomorpha; Ballophilidae.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492012002500001
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First report of two species of scarab beetles (Coleoptera, Scarabaeidae) inside nests of Azteca cf. chartifex Forel (Hymenoptera, Formicidae) in Brazilian Amazonian Rainforest Rev. Bras. entomol.
Alves-Oliveira,João Rafael; Mendes,Diego Matheus de Mello; Campos,Douglas de; Silva-Neto,Alberto Moreira da; Morais,José Wellington de; Grossi,Paschoal Coelho.
ABSTRACT We report for the first time the occurrence of two species of scarab beetles, Phileurus carinatus declivis Prell, 1914 (Scarabaeidae: Dynastinae) and Cyclidius elongatus (Olivier, 1789) (Cetoniinae: Cremastocheilini) inside nests of Azteca cf. chartifex Forel, 1896, a neotropical arboreal ant species. This report indicates that these two beetle species are associated, at least as inquilines, to this ant species, although the nature of this relationship remains unclear.
Tipo: Info:eu-repo/semantics/other Palavras-chave: Central Amazonia; Flower chafer; Myrmecophily; Rhinoceros beetle.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262016000400359
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Floral biology and a pollinator effectiveness test of the diurnal floral visitors of Tabernaemontana undulata Vahl. (Apocynaceae) in the understory of Amazon Rainforest, Brazil Acta Botanica
Moura,Thaysa Nogueira de; Webber,Antonio Carlos; Torres,Liliane Noemia Melo.
In this paper we examined the floral biology, per-visit effectiveness, frequency of visits and relative abundance of the diurnal floral visitor taxa of T. undulata (Apocynaceae) at two populations located in the primary forest and in a disturbed area connected to the continuous forest. Its hermaphrodite flowers show a long and narrow floral tube and introrse anthers form a cone around the apex of the style head where the pollen is deposited. The stigmatic head has three functional regions, in a complex pollination mechanism favoring cross-pollination. In the pollinator censuses conducted in the primary forest population we registered Eulaema bombiformis. In the disturbed area Euglossa sp. was responsible for visits on T. undulata fl owers. Eulaema...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Central Amazonia; Eulaema bombiformis; Euglossa; Pollination.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062011000200014
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Influence of edapho-climatic factors on the sporulation and colonization of arbuscular mycorrhizal fungi in two Amazonian native fruit species BABT
Oliveira,Arlem Nascimento de; Oliveira,Luiz Antonio de.
Arbuscular mycorrhizal fungi (AMF) colonization and spore numbers in the rhizosphere of two fruit species, Paullinia cupana Mart. and Theobroma grandiflorum Schum., growing in a terra firme ecosystem in Central Amazonia were studied from August 1998 to May 2000. Climatic and edaphic factors were also determined to investigate their influence on mycorrhizal variables. Soil pH, Al, Mn and effective cation exchange capacity exhibited seasonal variations during the investigation period. Temporal variations in mycorrhizal colonization levels and spore numbers occurred, indicating seasonality. Moreover, the patterns of mycorrhizal colonization levels and spore numbers for both host species were similar during the studied period. Mycorrhizal variables were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Arbuscular mycorrhizal fungi; P. cupana; T. grandiflorum; Central Amazonia.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000300021
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OSL age determinations of Pleistocene fluvial deposits in Central Amazonia Anais da ABC (AABC)
Soares,Emílio A.A.; Tatumi,Sonia H.; Riccomini,Claudio.
Absolute dating methods have been used in chronological studies of geological processes and sedimentary units of Quaternary age in Central Amazonia, Brazil. Although radiocarbon dating has been very useful in archaeological research and soil studies, the temporal interval of this method is inefficient in evaluating the sedimentation aspects and geological events from the beginning of the Quaternary in the Amazon basin. The use of crystal luminescence dating has been one of the most promising tool for determining the absolute dating of Quaternary deposits in the Amazonian region. Optically stimulated luminescence (OSL) dating, following the MAR and SAR protocols, in a tectonic-sedimentary study of Quaternary fluvial deposits in the confluence area of the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Crystal luminescence dating; Quaternary; Fluvial terraces; Central Amazonia.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652010000300017
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Polinizadores de Bertholletia excelsa (Lecythidales: Lecythidaceae): interações com abelhas sem ferrão (Apidae: Meliponini) e nicho trófico Neotropical Entomology
Santos,Charles F; Absy,Maria L.
This paper presents an analysis of the foraging behavior and interactions of Xylocopa frontalis Olivier (Apidae: Xylocopini) and Eulaema mocsaryi (Friese) (Apidae: Euglossini) in the presence of stingless bees (Apidae: Meliponini) in flowers of Bertholletia excelsa, the Brazilian nut. The palynological load carried by both species was also examined. This study was conducted in the farm Aruanã, Itacoatiara/ Amazonas state, Brazil, during the flowering peak of B. excelsa. The visitation by the main pollinators X. frontalis and E. mocsaryi were influenced by the presence and activities of stingless bees in the flowers of B. excelsa. Meliponini bees did not have any effect on the visits and collection of floral resources by X. frontalis, while negatively...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Foraging strategy; Interspecific relation; Pollen stealing; Central Amazonia; Brazil.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2010000600002
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Pollination of Pagamea duckei Standl. (Rubiaceae): a functionally dioecious species Biota Neotropica
Terra-Araujo,Mário Henrique; Webber,Antonio Carlos; Vicentini,Alberto.
The floral biology, pollination and breeding system of Pagamea duckei Standl. (Rubiaceae) were studied at the Reserva Biológica da Campina, Manaus, Amazonas, Brazil. Floral morphology suggested that P. duckei is a distylous species. However, crossing experiments revealed that it is functionally dioecious. The flowers are actinomorphic, yellowish, produce nectar and a sweet odor, which is more intense in the morning. Anthesis started in the morning between 5.00 and 6.00 AM and extended until dusk, when the corolla tube abscissed. The flowers were visited mostly by bees of the genus Melipona. Pagamea duckei is not agamospermic and thus needs pollen vectors for effective pollination. The results of this study strengthen the idea that, in Pagamea, species with...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Floral biology; Heterostyly; Campinarana forests; Central Amazonia.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032012000400010
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Rhizobia amylase production using various starchy substances as carbon substrates BJM
Oliveira,Arlem Nascimento de; Oliveira,Luiz Antonio de; Andrade,Jerusa Sousa; Chagas Júnior,Aloisio Freitas.
Six isolates of indigenous rhizobia of Central Amazonia were screened for the production of amylases in liquid media using various starchy substances as carbon sources. All rhizobia strains could produce more extracellular protein, biomass and amylases with the different kinds of carbon substrates. Among the carbon sources tested maltose was the best substrate for protein and amylase production. In general, peach palm flour and corn starch (maizena®) were also considered to be good carbon sources for rhizobia amylases. On the other hand, the biomass production by the rhizobia isolates was higher in the presence of oat flour. INPA strain R-926 was a good amylase producer in maltose (1.94 U) and corn starch (0.53 U) media. INPA strain R-991 was also a good...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Rhizobium; Bradyrhizobium; Cowpea; Soybean; Peach palm; Central Amazonia.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822007000200005
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Seasonal dynamics of arbuscular mycorrhizal fungi in plants of Theobroma grandiflorum Schum and Paullinia cupana Mart. of aN agroforestry system in Central Amazonia, Amazonas State, Brazil BJM
Oliveira,Arlem Nascimento de; Oliveira,Luiz Antonio de.
The seasonal dynamics of Arbuscular Mycorrhizal Fungi (AMF) was investigated in the rhizosphere of two fruit species in a terra firme (upland) ecosystem in Central Amazonia. Two host species (Theobroma grandiflorum and Paullinia cupana) and nine sampling months (August, September and December/1998, February, April, May and December/1999, February and May/2000) were studied in a completely randomized design, with five replications, set in a 2 x 9 factorial experiment. Soil (0-20 cm depth) and root samples were collected between August 1998 and May 2000. The mean percent colonization of AMF for both species reached maximal values in February and May 2000 (rainy season). In April and May 1999, February and May 2000 (rainy season) the highest AMF spore numbers...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Arbuscular mycorrhizal fungi; Theobroma grandiflorum; Paullinia cupana; Agroforestry system; Central Amazonia.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822005000300011
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Soil water storage in an upland forest after selective logging in Central Amazonia Rev. Bras. Ciênc. Solo
Ferreira,S. J. F.; Luizão,F. J.; Ross,S. M.; Biot,Y.; Mello-Ivo,W. M. P..
Soil water storage of Central Amazonian soil profiles in upland forest plots subjected to selective logging (in average, 8 trees or 34, 3 m³ of timber per hectare were removed) was measured in four layers, down to a depth of 70 cm. The study lasted 27-months and was divided in two phases: measurements were carried out nearly every week during the first 15 months; in the following year, five intensive periods of measurements were performed. Five damage levels were compared: (a) control (undisturbed forest plot); (b) centre of the clearing/gap; (c) edge of the gap; (d) edge of the remaining forest; and (e) remaining forest. The lowest values for water storage were found in the control (296 ± 19.1 mm), while the highest were observed (333 ± 25.8 mm) in the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Selective logging; Soil water storage; Upland rain forest; Central Amazonia.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832004000100006
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Surface swimming behavior of the curculionid Ochetina uniformis Pascoe (Erirhininae, Stenopelmini) and Ludovix fasciatus (Gyllenhal) (Curculioninae, Erodiscini) Rev. Bras. entomol.
Sousa,Wesley Oliveira de; Marques,Marinêz Isaac; Rosado-Neto,Germano Henrique; Adis,Joachim.
The swimming behavior exhibited by specimens of L. fasciatus and O. uniformis was analyzed frame-by-frame with video observation recorded with a digital camera, attached to a stereomicroscope. Adults of O. uniformis, an aquatic insect, swim with all three pairs of legs. During the process of swimming the majority of the abdomen and rostrum remain submerged, part of the fore and hind tibiae remain above the surface, while the mid tibiae remain submerged. The mesothoracic legs, during the power-stroke stage, provide the greatest thrust while the metathoracic legs provide the least forward propulsion. The prothoracic legs, extended forward, help to direct the swimming. The semi-aquatic specie L. fasciatus shows the same swimming style as O. uniformis, that...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aquatic/semi-aquatic weevils; Behavioral adaptation; Central Amazonia; Pantanal Mato-grossense.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262007000100015
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The snakes of the genus Atractus Wagler (Reptilia: Squamata: Colubridae) from the Manaus region, central Amazonia, Brazil Naturalis
Martins, M.; Oliveira, M.E..
Taxonomic and natural history data are presented on eight species of Atractus from the Manaus region, central Amazonia, Brazil, namely: A. alphonsehogei, A. latifrons, A, major, A. poeppigi, A. schach, A. snethlageae, A. torquatus, and A. trilineatus. Four of these species are recorded for the first time for the region, which indicates the scarcity of snake collections in central Amazonia. Apresentamos dados sobre a taxonomia e a história natural de oito espéies de Atractus da região de Manaus, Amazônia central, Brasil: A. alphonsehogei, A. latifrons, A. major, A. poeppigi, A, schach, A. snethlageae, A. torquatus e A. trilineatus. Quatro destas espécies são registradas pela primeira vez para a região, o que indica a escassez de coletas de serpentes na...
Tipo: Article / Letter to the editor Palavras-chave: Serpentes; Colubridae; Atractus; Taxonomy; Natural history; Central Amazonia; 42.82.
Ano: 1993 URL: http://www.repository.naturalis.nl/record/318525
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Wood density of trees in black water floodplains of Rio Jaú National Park, Amazonia, Brazil Acta Amazonica
PAROLIN,Pia; WORBES,Martin.
The Jaú National Park is the largest protected forested area in the world. The Vitória Amazônica Foundation is working towards understanding its ecosystem, to which this paper contributes. Wood density was analysed in 27 common tree species growing in the blackwater flood-plains of the Rio Jaú, an affluent of the Rio Negro (Amazonia, Brazil). Wood was sampled with an increment borer. Mean wood density of the analysed species ranged from 0.35 to 0.87 g cm-3. The mean of all sampled species was 0.67 g cm-3 (st. dev. 0.13). Lowest density was found for Hevea spruceana with 0.32 g cm-3 and highest for Crudia amazonica with 0.9 g cm-3.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Wood specific gravity; Wood density; Increment rings; Blackwater floodplain forest; Igapó; Rio Jaú; Central Amazonia.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672000000300441
Registros recuperados: 13
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