Sistemas de polonização de duas espécies simpátricas de Dalechampia (Euphorbiaceae) no Amazonas, Brasil

Armbruster, W. Scott; Webster, Grady L.

doi:10.1590/1809-43921981111013

Cited by 17 publications

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“…This was determined from pollen collecting behavior as well as the frequency and time of permanence on the flowers. Similarly, Gimenes (2002) (Armbruster & Webster 1981;Armbruster & Herzig 1984), they seem to be important sources of pollen for T. diversipes. The high frequency of Dalechampia's pollen grains in the analyzed samples and the absence of information on resin collection by Tetrapedia bees, reinforce the evidence that Dalechampia species are important sources of pollen for this bee.…”

Section: Discussionmentioning

confidence: 98%

Nesting and use of pollen resources by Tetrapedia diversipes Klug (Apidae) in Atlantic Forest areas (Rio de Janeiro, Brazil) in different stages of regeneration

Menezes¹,

Gonçalves-Esteves²,

Bastos³

et al. 2012

Rev. Bras. entomol.

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Nesting and use of pollen resources by Tetrapedia diversipes Klug (Apidae) in Atlantic Forest areas (Rio de Janeiro, Brazil) in different stages of regeneration. The nesting in trap-nests and use of pollen sources in larval food by Tetrapedia diversipes Klug, 1810 (Apidae) was compared between regenerating areas of Atlantic Forest. The study was conducted between April 2008 and October 2009 at União Biological Reserve, Rio de Janeiro, Brazil. T. diversipes nested in 66 trap-nests and showed a peak of nesting during the months of highest rainfall. The most frequent pollen type in brood cells during the wet season was Dalechampia sp. 1. During the dry season, the type Ludwigia sp. was the most frequent, followed by Dalechampia sp. 2. The high frequency of Dalechampia and Ludwigia species in the larval food, observed in both habitats and in the two seasons could be considered relevant for T. diversipes, suggesting highly selective diet based primarily on two plant species unrelated, but similar in size of pollen grains.
Nidificação e uso de fontes de pólen por Tetrapedia diversipes Klug (Apidae) em áreas de Mata Atlântica (Rio de Janeiro, Brasil) em diferentes estágios de regeneração. A nidificação em ninhos-armadilha e o uso de fontes de pólen no alimento larval por Tetrapedia diversipes Klug, 1810 (Apidae) foram comparados entre áreas de Floresta Atlântica em regeneração. O estudo foi realizado entre abril de 2008 e outubro de 2009 na Reserva Biológica União, Rio de Janeiro, Brasil. T. diversipes nidificou em 66 ninhos-armadilha e apresentou um pico de nidificação durante os meses de maior precipitação pluviométrica. O tipo polínico mais frequente nas células de cria durante a estação chuvosa foi Dalechampia sp. 1. Durante a estação seca, o tipo Ludwigia sp. foi o mais frequente, seguido de Dalechampia sp. 2. A alta frequência de espécies de Dalechampia e Ludwigia no alimento larval, observada em ambos os habitats e nas duas estações deve ser considerada um fato relevante para T. diversipes, sugerindo uma dieta altamente seletiva baseada primariamente em duas espécies vegetais não relacionadas, porém semelhantes quanto ao tamanho dos grãos de pólen

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Section: Discussionmentioning

confidence: 98%

Nesting and use of pollen resources by Tetrapedia diversipes Klug (Apidae) in Atlantic Forest areas (Rio de Janeiro, Brazil) in different stages of regeneration

Menezes¹,

Gonçalves-Esteves²,

Bastos³

et al. 2012

Rev. Bras. entomol.

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“…The interfloral distances generally determine the minimum size of the effective pollinator (Armbruster and Webster 1981, Armbruster 1985 and personal observation). Small amounts of resin attract only certain species of female bees, large amounts of resin attract other species of female bees, fragrances attract only certain male bees.…”

Section: The Plants and Their Pollinatorsmentioning

confidence: 99%

“…Additional specificity derives from differences between species in time of day of flower and bract opening and in the distances between the gland and the stigmas and between the gland and the anthers. The interfloral distances generally determine the minimum size of the effective pollinator (Armbruster and Webster 1981, Armbruster 1985 and personal observation).…”

Section: The Plants and Their Pollinatorsmentioning

confidence: 99%

Reproductive Interactions Between Sympatric Dalechampia Species: Are Natural Assemblages "Random" or Organized?

Armbruster¹

1986

Ecology

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By. considering patterns of species co-occurrence and pollinator use, I attempted to answer the question: are natural assemblages of Dalechampia species (Euphorbiaceae) organized in ways that reduce the amount of interspecific pollination and/or competition for pollinator service? The observed structure was tested against three null models, one operating by species assemblage processes, one operating by species evolution processes, and a third operating by both processes. Two alternative operational definitions of sympatry were used with each model. The outcome (rejection or acceptance of the null hypothesis) was sensitive to the null model employed and the definition of sympatry used .. ~his und~rscores ~he i~portance of using biologically realistic null models, assumptions, and defimttons. Usmg the biOlogically more reasonable definition ofsympatry, tests against all three. n~ mod~ls suggest that assemblages of Da/echampia are structured with respect to pollinator use; mdirect eVIdence suggests that some of this structuring has occurred through evolution of component taxa.

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“…Although visits of bees to Dalechampia were observed in Brazil in the 19th century, little was understood about the pollination until the observations of Webster in Mexico in 1976 (Armbruster & and Sazima, Sazima & Carvalho-Okano in Brazil in 1979(Sazima et al, 1985. Additional observations have been reported from Panama (Armbruster & Herzig, 1984), Ecuador (Armbruster & Webster, 1982), Amazonian Brazil (Armbruster & Webster, 1981) and Costa Rica (Armbruster, 1983(Armbruster, , 1984b. It is now apparent that the majority of neotropical species are pollinated by female bees that visit the inflorescences to gather resin from the gland in the staminate subflorescence.…”

Section: Ecologymentioning

confidence: 87%

A synopsis of the neotropical species of Dalechampia (Euphorbiaceae)

Webster

Armbruster

1991

Botanical Journal of the Linnean Society

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WEBSTER, G. L. & ARMBRUSTER, W. S., 1991. A synopsis of the neotropical species ofDalechampia (Euphorbiaceae). The characters used in inferring phylogenetic relationship in Dalechampia are discussed, and a consistent terminology is devised for the parts of the distinctive pseudanthial inflorescences. The infrageneric classification is radically modified, with the 92 provisionally accepted binomials for the neotropical taxa referred to six sections: Rhopalostylis, Dioscoreifoliae, Cremophyllum, Coriaceae, Tiliifoliae and Dalechampia. As here interpreted, section Dalechampia includes 53 species in five subsections; one new subsection, Convolvuloides, is described.

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Sistemas de polonização de duas espécies simpátricas de Dalechampia (Euphorbiaceae) no Amazonas, Brasil

Cited by 17 publications

References 1 publication

Nesting and use of pollen resources by Tetrapedia diversipes Klug (Apidae) in Atlantic Forest areas (Rio de Janeiro, Brazil) in different stages of regeneration

Nesting and use of pollen resources by Tetrapedia diversipes Klug (Apidae) in Atlantic Forest areas (Rio de Janeiro, Brazil) in different stages of regeneration

Reproductive Interactions Between Sympatric Dalechampia Species: Are Natural Assemblages "Random" or Organized?

A synopsis of the neotropical species of Dalechampia (Euphorbiaceae)

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