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| Registros recuperados: 42 | |
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| Monteiro,Daniela; Ramalho,Mauro. |
| It is controversial the role played by Meliponina bees in the pollination of mass flowering trees with small generalized flowers (FMPG), very common group of trees in the tropical forest canopy. The species richness and relative abundance of flower visiting insects of the mass flowering tree Stryphnodendron pulcherrimum were measured to test the hypothesis of tight ecological association between these generalist bees and FMPG and to evaluate the effect of this relationship upon the reproductive success variation among tree crowns. The flower visiting insects were sampled on 10 flowering tree crowns at the Atlantic Rainforest in southern Bahia. Altogether, 553 visiting insects were collected during the flowering period of S. pulcherrimum: 293 (52%)... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Stingless bee; Pollination; Geitonogamy; Canopy. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2010000400009 |
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| EUCLIDES, V. P. B.; MONTAGNER, D. B.; BARBOSA, R. A.; VALLE, C. B. do; NANTES, N. N.. |
| The objective of the present study was to evaluate live weight gain per animal and per area and its relationship with the characteristics of pastures of Brachiaria brizantha cv. Paiaguás and Piatã. A randomized blocks experimental design was used, with two treatments and six replicates. The experimental area was 8.0 ha, divided into twelve paddocks of 0.67 ha. The grazing method used was continuous stocking, with variable stocking rate. Three tester steers were used per paddock. Sward heights were measured once a week, and the stocking rate (SR) was adjusted using regulator steers to maintain the sward height at 30 cm. Pasture samples were collected once a month, and herbage accumulation rate (HAR), percentage of leaves (PL), leaf:stem ratio (LSR), and... |
| Tipo: Artigo de periódico |
Palavras-chave: Canopy; Nutritive value; Stocking rate. |
| Ano: 2016 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1061652 |
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| Hoogmoed, M.S.; Avila-Pires, T.C.S.. |
| The Mission Radeau des Cimes to Petit Saut, French Guiana, offered the opportunity to study the herpetofauna of the canopy of the tropical rainforest, an area hardly studied sofar. Two localities at heights of 30 and 35 m could be studied, whereas data on a third site were obtained through information from other participants. The herpetological results of the research in the canopy were meagre. Only the frog Hyla leucophyllata (Beireis) and the lizard Mabuya bistriata (Spix) were observed in the canopy. Additionally the terrestrial herpetofauna was studied extensively and turned out to contain some species that had not been reported before from French Guiana. Also, for many species new distribution data within French Guiana were obtained. Le Mission Radeau... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Reptilia; Amphibia; Tropical rainforest; Canopy; Forest floor; Neotropics; French Guiana; 42.82. |
| Ano: 1991 |
URL: http://www.repository.naturalis.nl/record/318446 |
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| Batista,Natália de Almeida; Bianchini,Edmilson; Carvalho,Eloisa de Souza; Pimenta,José Antonio. |
| We aimed to answer the following questions related to the architecture of individuals 0.5-3.0 m in height belonging to understory or canopy/emergent layer tree species: "Is there a difference between individuals belonging to different strata developing in environments with the same light intensity, in terms of their architecture?"; and "Given the same light intensity, do understory species exhibit less crown plasticity than do canopy/emergent layer species?" Thirteen architectural variables were evaluated in 80 individuals per species. We found that understory species showed greater increases in stem thickness and leaf number, as well as wider, deeper crowns, longer branches, greater self-shading and less crown plasticity. Stems and crowns were more... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Resource allocation; Canopy; Allometric relationships; Understory. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062014000100004 |
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| MARANHÃO, T. D.; CÂNDIDO, M. J. D.; LOPES, M. N.; POMPEU, R. C. F. F.; CARNEIRO, M. S. de S.; FURTADO, R. N.; SILVA, R. R. da; SILVEIRA, F. G. A. da. |
| Abstract: This study was carried out aiming to evaluate the biomass components of elephant grass cv. Roxo at seven growth ages, during rainy, transition and dry seasons. A completely randomized design was adopted with a split plot arrangement over time. The treatments consisted of seven growth ages (9, 18, 27, 36, 45, 54 and 63) and three seasons (rainy, transition and dry). The variables green forage biomass, dead forage biomass, green stem biomass and green leaf blade biomass showed positive linear responses to age and had their magnitude influenced by the evaluated seasons. The live/dead material ratio showed a decreasing linear response as a function of age. The leaf blade/stem ratio showed a negative linear adjustment in the rainy season, reaching a... |
| Tipo: Artigo de periódico |
Palavras-chave: Grassland management; Growth stages; Seasonality; Estacionalidade; Estrutura do dossel; Capim Roxo; Estação seca; Manejo de pastagem; Pennisetum Purpureum; Capim Elefante; Forrageira Tropical; Gramínea Forrageira; Crescimento; Caule; Biomass; Canopy; Dry season; Grasslands; Leaves; Stems; Wet season; Pasture management. |
| Ano: 2018 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1094388 |
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| MOREIRA, J. B. da S.; COUTINHO, D. N.; CÂNDIDO, M. M. D.; POMPEU, R. C. F. F.; Duarte MARANHÃO, T. D.; NASCIMENTO, B. B. do; ALMEIDA, B. P. de; NASCIMENTO, D. R. do. |
| Abstract: In regions where the poor rainfall distribution reduces the availability of food to feed the herds, sorghum hybrids present as a viable forage resource to prolong the forage supply in the field. This study evaluated the morphogenetic characteristics of sorghum hybrids under grazing frequencies managed under intermittent stocking with sheep. The experiment was conducted at Núcleo de Ensino e Estudos em Forragicultura, Fortaleza-CE. The treatments were combinations between hybrids of Sorghum for grazing (BR and CM) and two grazing frequencies (60 and 80 cm canopy height), in a 2 x 2 factorial randomized block design, with four replications. Higher leaf elongation rate was observed in CM hybrid pastures and in the 60 cm frequency. The stem... |
| Tipo: Anais e Proceedings de eventos |
Palavras-chave: Altura do dossel; Estacionalidade da produção; Fluxo de biomassa; Lotação rotativa; Semiárido; Brasil; Produção de forragem; Pasto; Seasonality; Ovino; Sorgo Forrageiro; Sheep; Forage production; Canopy; Biomass production; Sorghum (Poaceae); Semiarid soils; Brazil. |
| Ano: 2018 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1096077 |
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| SCHÄFFER, L. H.; MATTAR, E. A.; NAKAJIMA, N. Y.; SILVA, S. A. da; BORGES, R. A.; BORGES, A. V. P.; CARPANEZZI, A. A.; NEVES, E. J. M.; ANGELO, A. C.; BRITEZ, R. M. de. |
| Este estudo teve como objetivo avaliar o crescimento das espécies Senna multijuga, Myrsine coriaceae, Schizolobium parahyba var. parahyba, Inga edulis, I. marginata e Citharexylum myrianthum na recuperação de uma área degradada pela pecuária. O experimento foi desenvolvido na Reserva Natural da Guaricica em Antonina, PR. Foram testados quatro tratamentos com diferentes densidades de indivíduos de cada espécie, cada um com três repetições em blocos de 3.000 m2. A avaliação foi baseada nas variáveis: altura total (h), diâmetro a 1,30 m do solo, área de cobertura da copa, área basal e mortalidade. Com exceção da mortalidade que foi comparada pelo teste de Kruskal-Wallis, as demais variáveis foram comparadas pelo teste de Tukey a 5% de significância. I. edulis... |
| Tipo: Artigo de periódico |
Palavras-chave: Cobertura de copa; Áreas de terras baixas; Forest landscape restoration; Lowland areas; Floresta; Regeneração; Canopy. |
| Ano: 2020 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1128968 |
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| RONCATTO, G.; ROMANO, M. R.; CARAVINA, S. M.; OLIBONE, D.; GIRARDI, E. A.; SOARES FILHO, W. dos S.; BOTELHO, S. de C. C.; WRUCK, D. S. M.. |
| Resumo: O objetivo do trabalho foi avaliar variáveis de crescimento vegetativo de limeira ácida ?Tahiti CNPMF 02? enxertada em porta-enxertos em Sorriso, MT e Guarantã do Norte, MT. Os porta-enxertos foram: citrandarin ?Indio? [C. sunki (Hayata) hort ex Tanaka x Poncirus trifoliata (L.) Raf. ?English?] (CTRI) e ?San Diego? (C. sunki x P. trifoliata ?Swingle?) (CTRSD), citrumelo ?Swingle? (C. paradisi Macfad. x P. trifoliata) (CTSW), limoeiro ?Cravo?, clones ?Santa Cruz? e ?CNPMF-003?, tangerineira ?Sunki Tropical? (C. sunki) e os híbridos HTR - 069, TSKC x (LCR x TR) - 059, LVK x LCR - 038, TSKC x CTSW ? 028, LRF x (LCR x TR) - 005, TSKC x TRFD 003 e 006. Aos 3,5 anos até os 4,5 anos de idade foram avaliadas as seguintes características: altura de planta,... |
| Tipo: Folhetos |
Palavras-chave: Limeira ácida; Volume da copa; Diâmetro do caule; Selo ODS 2; Selo ODS 12; Gomose; Porta Enxerto; Planta Porta-Enxerto; Doença de Planta; Fruta Cítrica; Volume; Estrutura Vegetal; Caule; Estatura de Planta; Tahiti; Citrus; Gummosis; Canopy. |
| Ano: 2022 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1149393 |
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| Chen, W.-M.; Lee , Y.-F.; Tsai, C.-F.; Yao, C.-T.; Chen, Y.-H.; Li, S.-H.; Kuo, Y.-M.. |
| Many birds in breeding seasons engage in vigorous dawn singing that often turns to a prominent chorus. We examined dawn chorus variation of avian assemblages in a tropical montane forest in Taiwan and tested the hypothesis that onset sequence is affected by eye sizes, foraging heights, and diet of birds. Chorus onset and duration varied between sampling months, but generally peaked in the prime breeding season. Overall dawn chorus length increased with, but mean duration per species was negatively correlated with, species richness. The inter-correlation among trait variables in phylogenetic independent contrasts was calculated and examined. Both foraging height and relative eye size were selected as positively explanatory factors, but no dietary effects... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Breeding; Canopy; Diets; Eye size; Foraging; Perch; Taiwan; Tropical forests; Birds; 42.83; 42.62. |
| Ano: 2015 |
URL: http://www.repository.naturalis.nl/record/578950 |
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| SILVA, C. S.; MONTAGNER, D. B.; EUCLIDES, V. P. B.; QUEIROZ, C. de A.; ANDRADE, R. A. S.. |
| O objetivo deste trabalho foi comparar as características estruturais, morfológicas e bromatológicas da forragem e o desempenho de bovinos de corte, da raça Caracu (200±9kg de peso inicial), suplementados com mistura mineral múltipla (0,25% do peso corporal) em pastos diferidos de Brachiaria brizantha, cv. ?Marandu?, e Brachiaria decumbens, cv. ?Basilisk?, sob pastejo contínuo. Após o rebaixamento dos pastos a 10cm de altura, realizado em março de 2014 por meio de pastejo, ambas as espécies foram vedadas e diferidas por 126 dias. O período experimental foi de julho a outubro de 2014, e as avaliações das características do pasto e as pesagens dos animais foram realizadas a cada 28 dias. A maior massa de forragem foi registrada em pastos de ?Marandu?. A... |
| Tipo: Artigo de periódico |
Palavras-chave: Estação seca; Mistura mineral múltipla; Estrutura do dossel; Multi-mineral mixture; Valor nutritivo; Dry season; Canopy; Nutritive value. |
| Ano: 2016 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1061755 |
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| TSCHOPE, G. L.; GOMES, F. J.; MARCIANO, R. B.; PEDREIRA, C. G. S.; PEDREIRA, B. C. e. |
| PT-BR: O objetivo desse estudo foi descrever e explicar a distribuição da frequência da altura do capim-marandu (Brachiaria brizantha cv. Marandu) sob lotação contínua e taxa de lotação variável em sistemas de produção animal. O experimento foi em delineamento em blocos completos casualizados, com avaliação de 2 sistemas de produção em 4 repetições. A distribuição da altura foi caracterizada com auxílio de histogramas, e os parâmetros média, moda, assimetria e curtose foram calculados para cada tratamento. A altura nos sistemas de produção foi semelhante (p = 0,888) com média de 37 cm. Os sistemas silvipastoril e pecuária tiveram distribuição acentuada (0,44 e 0,47 de curtose, respectivamente). A assimetria do sistema silvipastoril foi 0,209614 e da... |
| Tipo: Separatas |
Palavras-chave: Altura do dossel; Silvipastoril; Estatura de Planta; Pastejo; Nutrição animal; Sistema de pastejo; Sombreamento; Prática cultural; Canopy; Grazing; Silvopastoral systems. |
| Ano: 2017 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1086443 |
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| Ferlito,Filippo; Allegra,Maria; Torrisi,Biagio; Pappalardo,Helena; Gentile,Alessandra; Malfa,Stefano La; Continella,Alberto; Stagno,Fiorella; Nicolosi,Elisabetta. |
| ABSTRACT: The effect of basal zone defoliation on vines influences yield and ripening depending on the phenological stage and its intensity. Early basal defoliation (EBD) was carried out at flowering on the autochthonous Vitis vinifera (L.) cultivar ‘Nerello mascalese’ grown on the eastern slopes of Mount Etna, Sicily. The effects were evaluated over a two-year period. In the first year, the canopy retained 67 % of its original leaf area after EBD and in the second year, 58 %. Compared with control vines, mid-day leaf water potentials in the EBD vines enjoyed higher water status throughout the growing seasons in both years. EBD had no significant negative effects on yield but did have significant positive effects on the levels of total polyphenols, total... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vitis vinifera (L.); Photosynthesis; Canopy; Sustainability; Berry quality. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162020000600602 |
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| BARRETT, K.; VALENTIM, J. F.; TURNER II, B. L.. |
| Deforestation is responsible for a substantial fraction of global carbon emissions and changes in surface energy budgets that affect climate. Deforestation losses include wildlife and human habitat, and myriad forest products on which rural and urban societies depend for food, fiber, fuel, fresh water, medicine, and recreation. Ecosystem services gained in the transition from forests to pasture and croplands, however, are often ignored in assessments of the impact of land cover change. The role of converted lands in tropical areas in terms of carbon uptake and storage is largely unknown. Pastures represent the fastest-growing form of converted land use in the tropics, even in some areas of rapid urban expansion. Tree biomass stored in these areas spans a... |
| Tipo: Artigo de periódico |
Palavras-chave: Serviços ecossistêmicos; Deforestación; Cambio climático; Cubierta (plantas); Pastizales; Servicios ecosistémicos; Desmatamento; Impacto Ambiental; Mudança Climática; Planta de Cobertura; Pastagem; Deforestation; Environmental impact; Climate change; Canopy; Pastures; Ecosystem services; Amazonia. |
| Ano: 2013 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1131969 |
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| Tovar-Sánchez,Efraín; Valencia-Cuevas,Leticia; Mussali-Galante,Patricia; Ramírez-Rodríguez,Rolando; Castillo-Mendoza,Elgar. |
| BACKGROUND: Recently it has been proposed that the genetic diversity of foundation species influences the structure and function of the community by creating locally stable conditions for other species and modulating ecosystem dynamics. Oak species are an ideal system to test this hypothesis because many of them have a wide geographical distribution, and they are dominant elements of the forest canopy. In this study we explored the response of canopy arthropod community structure (diversity and biomass) to the level of genetic diversity of Quercus crassipes and Q. rugosa, two important canopy species. Also, we examined the effect of oak species and locality on some community structure parameters (diversity, biomass, rare species, and richness of arthropod... |
| Tipo: Journal article |
Palavras-chave: Arthropods community; Canopy; Foundation species; Genetic diversity; Quercus. |
| Ano: 2015 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2015000100012 |
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| Registros recuperados: 42 | |
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