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Registros recuperados: 9
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Distribuição e quantificação de classes de vegetação do Pantanal através de levantamento aéreo Rev. Bras. Bot.
SILVA,MARTA PEREIRA DA; MAURO,RODINEY; MOURÃO,GUILHERME; COUTINHO,MARCOS.
O método de levantamento aéreo foi adaptado e utilizado pela primeira vez para a elaboração de mapas de distribuição e quantificação de classes de vegetação no Pantanal Mato-Grossense por sub-região. Foram identificadas 16 classes, baseando-se em aspectos fitofisionômicos, sendo as principais campo (31,1%), cerradão (22,1%), cerrado (14,3%), brejos (7,4%), mata semidecídua (4,0%), mata de galeria e 2,4% de baceiro ou batume. Estas informações podem subsidiar a escolha de áreas de conservação ou preservação, bem como auxiliar o monitoramento de áreas com grande extensão e difícil acesso.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Neotropical savanna; Vegetation mapping; Wetland; Pantanal Matogrossense.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042000000200004
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Gochnatia polymorpha (Less.) Cabrera (Asteraceae) changes in leaf structure due to differences in light and edaphic conditions Acta Botanica
Rossatto,Davi Rodrigo; Kolb,Rosana Marta.
Gochnatia polymorpha (Less.) Cabrera is a widespread Asteraceae species found in different physiognomies of cerrado (Neotropical savanna) and in forest formations of southeast Brazil. This study describes some leaf anatomy characteristics of this species and quantitatively evaluates them in relation to different environments, as well as under different light conditions. We found quantitative differences in all anatomical parameters analyzed. The results demonstrate that high leaf anatomy plasticity is an adaptive advantage that allows this species to occur in diverse cerrado conditions.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Anatomical plasticity; Gallery forest; Leaf morphology; Neotropical savanna; Stomatal frequency.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062010000300002
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Interactions between frugivorous birds and plants in savanna and forest formations of the Cerrado Biota Neotropica
Purificação,Keila Nunes; Pascotto,Márcia Cristina; Pedroni,Fernando; Pereira,Jessiane Mayara Nogueira; Lima,Naftali Alves.
We recorded interactions between frugivorous birds and plants in the Cerrado and we assessed the role and importance of birds as potential seed dispersers. We analyzed the distribution of recorded feeding events, bird-plant interactions, and bird species composition between savanna and forest formations and between the dry and rainy seasons. Samplings were carried out from August 2009 to October 2010 and from November 2011 to August 2012 by means of line transects and focal observations. We recorded 348 feeding events and 187 interactions involving 44 plant species and 60 bird species. Most of the feeding events were observed in the forests and during the dry season (χ2 = 39.529; gl = 1; p < 0.001). However, no significant difference was found in the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Mutualistic interactions; Neotropical savanna; Seasonality; Seed dispersal.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032014000400105
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Key decision-making criteria for dormancy-breaking and ability to form seed banks of Cerrado native tree species Acta Botanica
Colado,Maria Luciana Zequim; Reis,Letícia Koutchin; Guerra,Angélica; Ferreira,Bruno Henrique dos Santos; Fonseca,Diego Rezende; Timóteo,Amanda; Gondim,Evânia Xavier; Guerin,Natalia; Garcia,Letícia Couto.
ABSTRACT Ecological restoration by direct seeding in the Cerrado biome still lacks information about native species germination, the need for dormancy overcoming and seed bank formation. This study aims to verify the effects of dormancy overcoming on germination of four tree species and the ability of 12 tree species to form seed banks for restoration use. Our results showed wide variation of species’ germination rates. Overcoming dormancy enhanced germination for Dimorphandra mollis, Hymenaea stigonocarpa, and Peltophorum dubium and decreased it for Copaifera langsdorffii, but was only cost-effective for H. stigonocarpa. Regarding the ability to form seed banks, only H. stigonocarpa and Cecropia pachystachya germinated and live seedlings of Terminalia...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Direct sowing; Ecophysiology; Neotropical savanna; Restoration ecology; Seed photoblastism.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000400694
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Leaf and fruiting phenology and gas exchange of Mangabeira in response to irrigation Braz. J. Plant Physiol.
Lobo,Francisco de A.; Campelo Junior,José H.; Rodríguez-Ortíz,Carmen E.; Lucena,Isabela C. de; Vourlitis,George L..
The mangabeira (Hancornia speciosa Gómez) is a native species of Brazil occurring in the savanna (Cerrado) and Atlantic Coastal forests. It is a promising species for large-scale horticulture due to the high-protein properties of its fruits, but extensive cultivation has not yet been accomplished. Research is still needed to determine cultivation techniques that will optimize productivity. As irrigation is considered to be the most important agronomic technique to enhance productivity, the goal of this investigation was to evaluate the effects of irrigation on leaf gas exchange (net photosynthesis rate and transpiration rate) and foliar and fruiting phenology. Our results suggest that irrigation acts by increasing the growth and fruit production of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Hancornia speciosa; Neotropical savanna; Photosynthesis; Specific leaf area.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202008000100001
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Predation on artificial nests in open habitats of central Brazil: effects of time and egg size Biota Neotropica
Oliveira,Cleyton Washington da Silva; Almeida,Glaudson Pereira; Paiva,Luciana Vieira de; França,Leonardo Fernandes.
The accuracy of artificial nests in representing natural patterns of nest predation has been widely studied in temperate regions and egg size is one of the most tested sources of bias. In the neotropics, experiments with artificial nests usually used larger than natural eggs, despite suggestions in literature that the eggs should be similar to those of the local species. Here, we tested the hypothesis of spatial-temporal variation in predation risk of artificial nests in relation to egg size. We used quail (Coturnix coturnix; large), Chestnut-bellied Seed-finch (Oryzoborus angolensis; small) and plasticine (both sizes) eggs placed in artificial nests. We analyzed daily nest survival using models in the Program MARK. The best-fit model included the effects...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bird; Cerrado; Neotropical savanna; Nest success; Reproduction.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032013000100016
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Sexual ratio and floral biology of the dioecious Neea theifera Oerst. (Nyctaginaceae) in a cerrado rupestre of central Brazil Acta Botanica
Amorim,Felipe Wanderley; Mendes-Rodrigues,Clesnan; Maruyama,Pietro Kiyoshi; Oliveira,Paulo Eugênio.
Dioecy is characterized by a complete separation of sexual functions on male and female plants. It has evolved many times in flowering plants and is widespread among distinct Angiosperm families. It is viewed as a reproductive strategy to reduce endogamy, and to promote optimal resource allocation between male and female sexual functions. Neea theifera is a common species in Cerrado, neotropical savannas in Brazil, but information regarding its reproductive biology is still incomplete. In order to investigate how environmental conditions possibly affect this dioecious species, we studied its floral biology, sex ratio and spatial distribution of sexual morphs along a soil-altitudinal gradient. The sex ratio did not significantly deviate from the expected...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Altitudinal gradient; Dioecy; Neotropical savanna; Sexual structure; Pollination.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062011000400006
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Structural differences in mammal assemblages between savanna ecosystems of the Colombian Llanos Pap. Avulsos de Zool. (São Paulo)
Castillo-Figueroa,Dennis; Martínez-Medina,Daniela; Rodríguez-Posada,Miguel E.; Bernal-Vergara,Sandra.
Abstract The Colombian Orinoquia region is characterized by a high diversity of mammals, which is associated with complex ecosystems that include large extensions of Neotropical savannas (known locally as “Llanos Orientales”). Despite accelerated anthropogenic transformations in savanna ecosystems, the knowledge to design effective conservation strategies, such as the distribution of mammal assemblages, is still lacking for this region. In this paper, we evaluate if assemblages of medium and large mammals (i.e., species richness, relative abundance and the contribution of the different trophic guilds) are homogeneous across the Colombian Llanos by comparing three savanna ecosystems: floodplains savannas associated with an Andean river, aeolian floodplains...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Neotropical savanna; Orinoco plains; Camera trapping; Medium- and large-sized mammals; Trophic guilds.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492019000100214
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What is on the menu for frugivorous birds in the Cerrado? Fruiting phenology and nutritional traits highlight the importance of habitat complementarity Acta Botanica
Maruyama,Pietro Kiyoshi; Melo,Celine; Pascoal,Camila; Vicente,Eduardo; Cardoso,João Custódio Fernandes; Brito,Vinícius Lourenço Garcia; Oliveira,Paulo Eugênio.
ABSTRACT The relationship between plants and frugivorous animals is modulated by morphological and nutritional characteristics of fruits, as well as their seasonal availability across habitats. We evaluated fruiting phenology, fruit morphology and nutritional characteristics of 35 abundant plant species from 15 families associated with frugivorous birds from distinct habitats in the Cerrado (savanna, forest, and palm swamp). For a subset of 16 plant species, we also evaluated the overlap in interactions with frugivorous birds using data from the literature. Open-habitat plants had their fruiting peak during the rainy season, while fruiting of forest species was evenly distributed across the year. Plants of the same family exhibited similar fruit morphology...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Copaifera langsdorffii; Matayba guianensis; Miconia rubiginosa; Neotropical savanna; Ouratea; Rourea induta; Rudgea viburnoides; Seed dispersal; Styrax ferrugineus; Vereda.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019000300572
Registros recuperados: 9
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