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| Registros recuperados: 121 | |
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| MISSAGIA,CAIO C.C.; VERÇOZA,FÁBIO C.; ALVES,MARIA ALICE S.. |
| The purpose of this study was to investigate the reproductive phenology and sharing of floral resource (nectar) ofDahlstedtia pinnata (Benth.) Malme. (Fabaceae), endemic of Atlantic forest, among hummingbirds. For the phenology, we looked at the presence of reproductive structures in the plants, and for floral resource sharing, the frequency of potential pollinators and foraging behaviors were examined. This study was conducted in Pedra Branca State Park, in state of Rio de Janeiro, in a dense ombrophilous forest, between August 2010 and August 2011. Flowering occurred between December 2010 and March 2011, and fruiting between April and June 2011. Hummingbirds' foraging schedules differed significantly, with legitimate visits to the flowers occurring in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Floral theft; Foraging behavior; Ornithophily; Pollination. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000401693 |
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| Sutherland, William J.; Conservation Science Group, Department of Zoology, University of Cambridge; w.sutherland@zoo.cam.ac.uk; Gardner, Toby; Conservation Science Group, Department of Zoology, University of Cambridge; tobyagardner@gmail.com; Bogich, Tiffany L.; Princeton University, Ecology & Evolutionary Biology; tbogich@princeton.edu; Bradbury, Richard B.; Conservation Science Department, Royal Society for the Protection of Birds;; Clothier, Brent; New Zealand Plant & Food Research, Climate Lab;; Jonsson, Mattias; Department of Ecology, Swedish University of Agricultural Sciences;; Kapos, Val; United Nations Environment Programme World Conservation Monitoring Centre;; Lane, Stuart N.; Institute of Hazard, Risk and Resilience, Science Laboratories;; Schroeder, Martin; Department of Ecology, Swedish University of Agricultural Sciences; martin.schroeder@slu.se; Spalding, Mark; The Nature Conservancy and Conservation Science Group, Department of Zoology, University of Cambridge; mspalding@TNC.ORG; Spencer, Tom; Cambridge Coastal Research Unit, Department of Geography, University of Cambridge;; White, Piran C. L. ; Environment Department, University of York;; Dicks, Lynn V.; Conservation Science Group, Department of Zoology, University of Cambridge; lvd22@cam.ac.uk. |
| The major task of policy makers and practitioners when confronted with a resource management problem is to decide on the potential solution(s) to adopt from a range of available options. However, this process is unlikely to be successful and cost effective without access to an independently verified and comprehensive available list of options. There is currently burgeoning interest in ecosystem services and quantitative assessments of their importance and value. Recognition of the value of ecosystem services to human well-being represents an increasingly important argument for protecting and restoring the natural environment, alongside the moral and ethical justifications for conservation. As well as understanding the benefits of ecosystem services, it is... |
| Tipo: Peer-Reviewed Insight |
Palavras-chave: Climate regulation; Policy making; Pollination; Regulating services; Solution scanning; Water regulation. |
| Ano: 2014 |
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| Crispim,Joelson Germano; Rêgo,Elizanilda R; Rêgo,Mailson M; Nascimento,Naysa Flávia F; Barroso,Priscila A. |
| ABSTRACT The objective of this study was to evaluate stigma receptivity and anther dehiscence in three floral development stages in F3 population of ornamental pepper (Capsicum annuum). A total of 162 plants (81 of purple corolla and 81 of white corolla) were used in this study. To analyze the stigma receptivity and anther dehiscence, three floral stages were analyzed: bud, pre-anthesis, and open flower. For each stage, 33 flowers of each phenotypic class were collected. The receptivity of the stigma was detected by dripping hydrogen peroxide solution (3%). For the evaluation of the level of receptivity, scores of 0 to 3 were assigned, varying according to the bubbles percentage found on the stigmatic surface. Scores of 1 to 5 were assigned for the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Capsicum annuum; Breeding; Floral biology; Pollination. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362017000400609 |
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| Rocha,Carlos Frederico Duarte da; Duarte,Marcelo. |
| The use of nectar and pollen of a bromeliad by two heliconiine butterflies, Heliconius ethilla narcaea Godart, 1819 and H. sara apseudes (Hübner, [1813]) (Lepidoptera, Nymphalidae, Heliconiinae), is herein reported. Observations were made during a pollination study of Aechmea gracilis Lindman (Bromeliaceae, Bromelioidea) in a second-growth forest of the village Vila Dois Rios, Ilha Grande, Rio de Janeiro State, southeastern Brazil. Field observations showed that H. ethilla can be more aggressive than H. sara in exploiting A. gracilis floral resources. Temporal differences in the use of these resources were also observed: H. sara remained comparatively less time on flowers than H. ethilla. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lepidoptera; Heliconius; Pollination; Aechmea gracilis; Competition; Home range. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752001000500027 |
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| Santos,Sílvia K. D.; Gimenes,Miriam. |
| ABSTRACT The family Convolvulaceae is widely distributed in tropical regions, mainly in open areas. Convolvulaceae flowers are characterized mainly by being beautiful and ephemeral, attracting many flower visitors that belong to different taxonomic groups. This work aimed to investigate the interactions between insects and flowers of Jacquemontia bracteosa (Convolvulaceae), focusing on the pollination efficiency, in an area in the Brazilian semiarid. From November 2011 to October 2012, floral biology of J. bracteosa was investigated as well as the flower visit frequency, behavior, and morphology of floral visitors. The flowers of J. bracteosa are white, showy and open early in the morning, lasting less than 12 hours, with fruiting occurring both by selfing... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pollination; Ancyloscelis apiformis; Augochlora; Jacquemontia bracteosa; Apoidea. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212016000100225 |
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| Missagia,Caio C.C.; Alves,Maria Alice S.. |
| Legitimate flowers visitors pollinate the flower during the visit and thus influence the production of fruits and seeds. We tested whether the visitation rate of potential pollinators is associated with the amount of seeds per fruit produced by the self-compatible bromeliad Tillandsia stricta (Bromeliaceae). We determined whether hummingbirds are legitimate visitors by testing for a correlation between visits and pollination (seed production) at the Guapiaçú Ecological Reserve (Reserva Ecológica de Guapiaçú), state of Rio de Janeiro. We tested 30 flowers, five of which were also monitored to test the possibility of spontaneous self-pollination. The remaining 25 flowers were exposed to floral visitors. Twenty-two flowers formed fruits and seeds, from which... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Atlantic forest; Hummingbird; Pollination; Self-compatibility. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702015000300260 |
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| Gottsberger,Gerhard. |
| ABSTRACT Data of six studied Neotropical Anaxagorea species are analyzed and discussed with respect to the population structure, flowering phenology, flower morphology, anthesis, scent emission, thermogenesis, floral visitors, breeding system, fruit-set and seed dispersal. The probably reason for the patchy distribution of small populations of Anaxagorea species within lowland tropical forests is given. A novel explanation of the functional significance of ruminate endosperm is presented. Flowering of the species follows either the annual or the continuous flowering pattern. All studied species have diurnal, two-day lasting, protogynous anthesis; several species have thermogenic flowers. Self-compatibility appears to be the prevailing reproductive system... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anaxagorea; Pollination; Reproductive biology; Radiation and diversification of Annonaceae; Reproductive systems; Ruminate endosperm; Seed dispersal. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000200313 |
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| Amarante,Cassandro Vidal Talamini do; Ernani,Paulo Roberto; Blum,Luiz Eduardo Bassay; Megguer,Clarice Aparecida. |
| Apple (Malus domestica Borkh.) trees, cultivars Gala and Fuji, were sprayed at full bloom with thidiazuron (TDZ) at doses of 0, 5, 10, or 20 g ha-1 of a.i. in order to evaluate its effects on plant growth and development, return bloom, fruit set, nutrition, and fruit yield. Fruit set increased with TDZ dose in 'Gala' but not in 'Fuji'. TDZ did not affect fruit yield in any cultivar. In 'Gala', the return bloom was reduced in about 50% at TDZ doses of 10 or 20 g ha-1. TDZ increased shoot growth in both cultivars. In leaves, TDZ decreased the concentration of Ca and Mg in 'Gala' and of Mg in 'Fuji', but did not affect the chlorophyll content, leaf area, length, width, and dry mass per cm² regardless of cultivar. In fruits, the effect of TDZ varied according... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Malus domestica; Cytokinin; Phenylurea; Calcium; Fruit yield; Pollination; Plant development. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2002001000003 |
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| Vitali-Veiga,Maria J.; Machado,Vera L.L.. |
| Inspite of Etythrina species exhibit morphologic attributes for adaptation to pollination by nectarivorous birds mentioned in the literature, E. speciosa is pollinated by lots of bees (Apinae and Meliponinae) which show a great urban occurrence. Systems of E. speciosa floral reproduction, fenology, diversity, frequency and constancy of insects visiting at different hours and flowering periods were studied. E. speciosa is Biocompatible, but xenogamy is the predominant system of reproduction. A large diversity of insects visiting the inflorescences was observed, with predominance of bees. The bee species showed a higher frequency: Apis mellifera Linnaeus, 1758 (45,0 %), Trigona spinipes (Fabricius, 1793) (28,6%), Trigona hyalinata (Lepeletier, 1836) (12,2 %)... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pollination; Erythrina speciosa; Bee; Fenology; Floral visitors. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752000000200007 |
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| Vitali-Veiga,Maria de Jesus; Dutra,João Cloves Stanzani; Machado,Vera Lígia Letízio. |
| Studies were carried out with Lagerstroemia speciosa Pers. on floral reproductive systems, diversity and constancy of visiting insects at different hours of day, the behaviour of these insects at the flowers and the influence of these environmental factors in relation to their visits. The fenology, anthesis and others particularity of this vegetal species was studied. A great diversity of insects was verified visiting the flowers with the predominance of bees. The most frequent and constant species encountered were: Nannotrigona testaceicornis (Lepeletier, 1836) (40,2%), Tetragonisca angustula (Latreille, 1811) (16,9%), Apis mellifera Linnaeus, 1758 (11,8%), Plebeia droryana (Friese, 1900) (9,1 %) e Exomalopsis fulvofasciata (Smith, 1879) (8,5%). The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bee; Flower visitors; Phenology; Pollination; Lagerstroemia speciosa. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751999000200006 |
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| Registros recuperados: 121 | |
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