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Registros recuperados: 26
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Abelhas generalistas (Meliponina) e o sucesso reprodutivo de Stryphnodendron pulcherrimum (Fabales: Mimosaceae) com florada em massa na Mata Atlântica, BA Neotropical Entomology
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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Annotated checklist of the herpetofauna of Petit Saut, Sinnamary River, French Guiana Naturalis
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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Architecture of tree species of different strata developing in environments with the same light intensity in a semideciduous forest in southern Brazil Acta Botanica
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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Blast development on the new rice plant type in relation to canopy structure, microclimate, and crop management practices International Rice Research Institute
Pangga, Ireneo B..
163 l. : ill. Thesis (M.S.) -- University of the Philippines at Los Baños
Tipo: Thesis Palavras-chave: Rice; Blast disease; Canopy; Microclimate; Plant cultural practices; Nitrogen fertilizers.
Ano: 1995 URL: http://hdl.handle.net/123456789/647
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Comparing two technologies for quantifying rice plant cover in breeding nurseries International Rice Research Institute
Caton, B. P.; Navarez, D. C.; Cope, A. E..
p.70-71
Palavras-chave: Growth; Leaf area index; Canopy; Photography; Image processing.
Ano: 2004 URL: http://hdl.handle.net/123456789/865
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Comparison between canopy trees and arboreal lower strata of urban semideciduous seasonal forest in Araguari - MG BABT
Souza,João Paulo de; Araújo,Glein Monteiro; Schiavini,Ivan; Duarte,Polyana Custódio.
The present study intended to determine the phytosociological characteristics of the tree elements on the lower strata and the canopy of a semideciduous seasonal forest. The trees (> 15 cm circumference at breast height) were sampled in 40 plots of 10m x 20m. The individuals in the lower strata (> 1m up to 15 cm of circumference in the base of the stem) were sampled in plots of 10m x 10m. Licania apetala and Micrandra elata obtained the first and second places in the two strata. Among the species with the highest value of importance on the canopy, Alchornea glandulosa, Pimenta pseudocaryophyllus, Copaifera langsdorffii, Heisteria ovata and Didymopanax morototoni presented a ratio of less than one individual in the lower strata when compared to the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Semideciduous forest; Lower strata; Canopy.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000600012
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Dawn chorus variation in East-Asian tropical montane forest birds and its ecological and morphological correlates Naturalis
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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Defasagem entre as produtividades real e potencial do algodoeiro herbáceo: limitações morfológicas, fisiológicas e ambientais. Infoteca-e
BELTRÃO, N. E. de M.; AZEVEDO, D. M. P. de.
Fatores limitantes relacionados com a morfologia, a organografia e arquiteture do algodoeiro herbaceo; fatores limitantes relacionados com -a fisiologia e a bioquimica da planta do algodoeiro herbaceo; fatores limitantes relacionados com as condicoes do ambiente; consideracoes holoticas envolvendo fatores da planta e do ambiente.
Tipo: Livro técnico (INFOTECA-E) Palavras-chave: Herbaceo; Taxas de Crescimento; Cultura; Fotorrespiracao; Trofofilos; Dossel; Balanco; Assimilado; Limitacao incontrolavel; Desenvolvimento; Brasil; Paraiba; Annual cotton; Production; Growth rate; Reespiration; Assimilation; Crop; Levll; Not controllable; Limitation; Growth; Deelopment.; Algodão; Bioquímica; Crescimento; Fotossíntese; Fisiologia Vegetal; Gossypium Hirsutum; Metabolismo; Respiração.; Produção; Biochemistry; Canopy; Leaves; Physiology.; Photosynthesis; Photorespiration; Metabolism.
Ano: 1993 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/264934
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Distribution and recycling of canopy nitrogen storage reserves in sweet cherry (Prunus avium) fruiting branches following 15N-urea foliar applications after harvest Ciencia e Investigación Agraria
Ayala,Marlene; Bañados,Pilar; Thielemann,Mariana; Toro,Román.
In sweet cherries, accumulated nitrogen (N) stores from the previous fall support early spring growth. To complement the N supply in the soil, Chilean growers use foliar urea applications after harvest. Information on the effectiveness of foliar N applications in sweet cherry is lacking. To study the canopy distribution of N applied as urea foliar sprays, an experiment using a "Bing"/"Gisela®6" ("GI®6") sweet cherry orchard was carried out in 2009/2010 in Chile (35° 09' 53'' S, 71° 20' 43'' W). The objective was to investigate N distribution and recycling in 3-year-old fruiting branches. A total of 120 branches (one per tree) were labeled using 15N-urea. 15N-urea was applied to the whole branch on four separate dates or treatments (TR) after fruit harvest:...
Tipo: Journal article Palavras-chave: Bark; Buds; Canopy; Leaves; N use efficiency; Fruit; Stored N; Spur; Sweet cherry wood.
Ano: 2014 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202014000100007
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Early defoliation effects on water status, fruit yield and must quality of ‘Nerello mascalese’ grapes Scientia Agricola
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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Effect of host-plant genetic diversity on oak canopy arthropod community structure in central Mexico RChHN
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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Effects of deforestation on headwater stream fish assemblages in the Upper Xingu River Basin, Southeastern Amazonia Neotropical Ichthyology
Ilha,Paulo; Rosso,Sergio; Schiesari,Luis.
ABSTRACT The expansion of the Amazonian agricultural frontier represents the most extensive land cover change in the world, detrimentally affecting stream ecosystems which collectively harbor the greatest diversity of freshwater fish on the planet. Our goal was to test the hypotheses that deforestation affects the abundance, richness, and taxonomic structure of headwater stream fish assemblages in the Upper Xingu River Basin, in Southeastern Amazonia. Standardized sampling surveys in replicated first order streams demonstrated that deforestation strongly influences fish assemblage structure. Deforested stream reaches had twice the fish abundance than reference stream reaches in primary forests. These differences in assemblage structure were largely driven...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Arc of Deforestation; Canopy; Land use; Ichthyofauna; Vegetation cover.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252019000100201
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Forest structure and species composition along a successional gradient of Lowland Atlantic Forest in Southern Brazil Biota Neotropica
Marques,Márcia C.M.; Zwiener,Victor P.; Ramos,Fernando M.; Borgo,Marília; Marques,Renato.
The Lowland Forest is one of the most disturbed and fragile ecosystems in the Atlantic Forest biome, yet little is known regarding its successional trajectory and resilience. We evaluated changes in species assemblages and forest structure of the canopy and understory along a successional gradient (young 21-yrs old forest, immature 34-yrs old forest and late successional 59-yrs old forest) aiming to assess changes in species composition and successional trajectory of different strata of secondary forests. A 0.1 ha plot (ten 10x10 m sub-plots) from each forest stand was surveyed for trees and shrubs with a diameter at breast height (DBH) ≥ 4.8 cm (canopy) and for individuals with heights ≥ 1 m and DBH < 4.8 cm (understory). A total of 3,619 individuals...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Canopy; Chronosequence; Restinga; Understory.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032014000300118
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Habitat utilization and CAM occurrence among epiphytic bromeliads in a dry forest from southeastern Brazil Rev. Bras. Bot.
Fontoura,Talita; Reinert,Fernanda.
We studied the community and habitat occupation of epiphytes to understand how these plants cope with a supposedly stressful habitat: i) how general epiphytes occupy tree trunks, ii) how epiphytic bromeliads, occupy their supportive trees, iii) how CAM bromeliads are spatially distributed. The study was done in the dry forest of Jacarepiá, State of Rio de Janeiro. Data collection on epiphytes, phorophytes, and trees was based on the point-center quarter method. The photosynthetic pathway of the bromeliad species was determined using isotope ratio mass spectrometry. The presence of Gesneriaceae, Araceae, and Cactaceae indicates that some humidity is present in the area allowing the presence of supposedly less-specialized epiphytes. There was no correlation...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Atlantic rainforest; Bromeliaceae; Canopy; Restinga vegetation.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042009000300011
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Modelagem da hidrografia em planos de manejo e critérios para definição de árvores em APP pelo Modeflora. Infoteca-e
FIGUEIREDO, E. O.; MOURA, D. C. de S.; FIGUEIREDO, S. M. de M.; PAPA, D. de A..
Novas tecnologias, sendo advindas do geoprocessamento e do sensoriamento remoto, vêm sendo desenvolvidas a fim de auxiliar no processo de delimitação das APPs e demarcação das árvores. No entanto, faltam estudos para investigar e comprovar sua eficácia. Não há registro de trabalhos, publicados no Brasil, que utilizem diferentes metodologias na definição de APPs para avaliá-las. O presente trabalho teve como objetivo propor uma metodologia precisa para o mapeamento de áreas de preservação permanente e definição de árvores protegidas e exploráveis na região de influência das APPs, comprovando a sua aplicabilidade nos PMFS.
Tipo: Circular Técnica (INFOTECA-E) Palavras-chave: Código Florestal; Área de proteção ambiental; Área de Preservação Permanete (APP); Geotécnica; Manejo florestal; Biometria florestal; Embrapa Acre; Manejo de precisão; Sistema de posicionamento global; Forest biometry; Modelagem 3D; Modeflora; Acre; Rio Branco (AC); Biometría forestal; Amazônia Ocidental; Western Amazon; Agricultura de precisión; Mapeamento; Cubierta (plantas); Inventario forestal; Ley ambiental; Manejo forestal; Sistemas de información geográfica; Sistemas de posicionamiento global; Teledetección.; Sensoriamento remoto; Sistema de informação geográfica; Agricultura de precisão; Inventário florestal; Administração florestal; Vegetação; Hidrografia; Cartografia; Hidrologia.; Precision agriculture; Forest management; Global positioning systems; Geographic information systems; Forest inventory; Hydrology; Canopy; Environmental law.; Cartography; Remote sensing.
Ano: 2009 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/852921
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Occurrence and natural history of Myrmelachista Roger (Formicidae: Formicinae) in the Atlantic Forest of southeastern Brazil RChHN
AKEMI NAKANO,MÁRCIA; OLIVEIRA DE MIRANDA,VITOR F; RODRIGUES DE SOUZA,DÉBORA; FEITOSA,RODRIGO M; MORINI,M. SANTINA C.
Information on the biology of the species in Myrmelachista remains notably scarce. The objective of this study was to report the occurrence, analyze the influence of canopy cover on the number of nests in twigs in the litter describe behavioral characteristics of this genus. Hand sampling was performed on trees and twigs deposited in the litter. A total of 84 nests and seven species were found. Myrmelachista ruszkii and M. catharinae were the most frequent and abundant species. In trees, most of the nests were located at the tips of dry twigs, and these nests were probably the source of the nests found in the litter of fragments of Atlantic Forest of southeastern Brazil. Canopy cover is associated with the number of nests that were in twigs.
Tipo: Journal article Palavras-chave: Canopy; Dense ombrophilous forest; Polydomy; Reproduction; Tree species.
Ano: 2013 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2013000200006
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Physiological characteristics of cassava tolerance to prolonged drought in the tropics: implications for breeding cultivars adapted to seasonally dry and semiarid environments Braz. J. Plant Physiol.
El-Sharkawy,Mabrouk A..
The paper summarizes research conducted at International Center for Tropical Agriculture (CIAT) on responses of cassava to extended water shortages in the field aided by modern gas-exchange and water-relation techniques as well as biochemical assays. The aim of the research was to coordinate basic and applied aspects of crop physiology into a breeding strategy with a multidisciplinary approach. Several physiological characteristics/traits and mechanisms underpinning tolerance of cassava to drought were elucidated using a large number of genotypes from the CIAT core germplasm collection grown in various locations representing ecozones where cassava is cultivated. Most notable among these characteristics are the high photosynthetic capacity of cassava leaves...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agriculture; Breeding; Canopy; Carboxylation enzymes; C3-C4 intermediate; Ecophysiology; Growth; Leaf photosynthesis; Manihot sp.; PEP carboxylase; Productivity; Stomata; Water stress; Yield.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202007000400003
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Potato crop growth as affected by nitrogen and plant density PAB
OLIVEIRA,CARLOS ALBERTO DA SILVA.
Growth and development variables and dry matter characteristics were studied for cultivar Snowden of potato (Solanum tuberosum L.) to evaluate nitrogen and plant density influence. Disregarding ending of season plant stress, the average number of actives haulms per plant was five and it was not affected by plant spacing. However, seasonal and final number of active haulms per plant were increased at 200 kg/ha of nitrogen. Maximum stem elongation was reached quickly with double density and had the tendency to keep constant at the highest and lowest nitrogen levels after 70 days after planting. Specific stem mass defined as mass per unit stem length was established as an indirect measure of stem thickness and load capacity. Specific leaf mass position in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Snowden cultivar; Plant nutrition; Canopy; Leaf area; Tubers; Stems; Dry matter; Plant population.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2000000500011
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Rice yield constraints and production technology: perception of farmers through PRA International Rice Research Institute
Singh, S. P.; Shrivastava, S. K.; Kendra, K. V..
p.72-73
Palavras-chave: Growth; Leaf area index; Canopy; Photography; Image processing.
Ano: 2004 URL: http://hdl.handle.net/123456789/867
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Richness of Chrysomelidae (Coleoptera) depends on the area and habitat structure in semideciduous forest remnants Iheringia, Sér. Zool.
Teles,Thiago S.; Ribeiro,Danilo B.; Raizer,Josué; Linzmeier,Adelita M..
ABSTRACT The total area of a habitat patch can increase the local species richness both directly (through balance between immigration and extinction) and indirectly (by increasing the habitat heterogeneity and/or as an effect of sample effort). More heterogeneous environments present a wider variety of resources and conditions, allowing species to coexist through niche differentiation. This study shows that the diversity of Chrysomelidae depends on the area and habitat structure of semideciduous forest remnants. We sampled 16 remnants with Malaise traps in August 2012 to March 2013. In order to characterize the habitat, the area, structural heterogeneity of the understory, coverage and canopy height were measured. These variables were used in a path...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Canopy; Leaf beetle; Phytophaga; Understory.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212019000100240
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