scholarly journals The most effective pollinator revisited: pollen dynamics in a spring-flowering herb

2013 ◽  
Vol 7 (3) ◽  
pp. 315-322 ◽  
Author(s):  
Marcin Zych ◽  
Jan Goldstein ◽  
Katarzyna Roguz ◽  
Małgorzata Stpiczyńska
Keyword(s):  
Pollen Dynamics ◽  
Effective Pollinator

Satellite-based phenology products and in-situ pollen dynamics: A comparative assessment

2022 ◽  
Vol 204 ◽  
pp. 111937
Author(s):  
Linze Li ◽  
Dalai Hao ◽  
Xuecao Li ◽  
Min Chen ◽  
Yuyu Zhou ◽  
...  
Keyword(s):  
Comparative Assessment ◽  
Pollen Dynamics

scholarly journals Polinização de Vellozia candida Mikan (Velloziaceae) nos Afloramentos Rochosos do Costão de Itacoatiara, Niterói, RJ: Um Caso de Melitofilia em Inselbergue do Brasil

2012 ◽  
Vol 5 (1) ◽  
pp. 29-32
Author(s):  
Fábio Castro Verçoza
Keyword(s):  
Floral Biology ◽  
Pollination Ecology ◽  
Reproductive Phenology ◽  
Flowering Period ◽  
Rock Outcrops ◽  
Floral Visitors ◽  
Rocky Outcrops ◽  
And Behavior ◽  
Effective Pollinator

Este trabalho apresenta dados sobre a fenologia reprodutiva, a biologia floral e a ecologia da polinização de Vellozia candida Mikan (Velloziaceae) nos afloramentos rochosos do Costão de Itacoatiara, Niterói, RJ. Uma população de dez indivíduos da espécie foi estudada nessa localidade no período de junho de 2006 a dezembro de 2008. Foram realizadas observações sobre período de floração, morfologia, cor e odor das flores, ocorrência e comportamento dos visitantes florais. A floração de V. candida ocorreu de setembro a dezembro nos dois anos consecutivos do estudo. As flores são brancas, nectaríferas e exalam odor suave e adocicado. Reúnem características típicas da síndrome da melitofilia e foram intensamente visitadas por três espécies de abelhas. Xylocopa ordinaria Smith se destacou como o polinizador efetivo da espécie estudada. Por ser uma abelha de grande porte e robusta, durante a coleta de néctar e de pólen, deposita este último no estigma, polinizando as flores. Pollination of Vellozia candida Mikan (Velloziaceae) on Rock Outcrops of Costão de Itacoatiara, Niterói, RJ: A Case of Mellitophily Inselberg BrazilAbstract. This paper presents data on the reproductive phenology, floral biology and pollination ecology of Vellozia candida Mikan (Velloziaceae) on rocky outcrops of Costão Itacoatiara, Niterói, RJ. A population of ten individuals of the species was studied in this location from June 2006 to December 2008. Observations were made on flowering period, morphology, color and odor of flowers, the occurrence and behavior of floral visitors. The flowering of V. candida occurred from September to December in two successive years of study. The flowers are white, exude nectar and sweet odor. Meet typical syndrome melitophyly and were intensively visited by three species of bees. Xylocopa ordinaria Smith stood out as the effective pollinator of the species studied. Being a bee large and robust, while collecting nectar and pollen, the latter deposited on the stigma, pollinating the flowers.

Pollination Syndromes: A Global Pattern of Convergent Evolution Driven by the Most Effective Pollinator

2015 ◽  
pp. 203-224 ◽  
Author(s):  
Lorena Ashworth ◽  
Ramiro Aguilar ◽  
Silvana Martén-Rodríguez ◽  
Martha Lopezaraiza-Mikel ◽  
Germán Avila-Sakar ◽  
...  
Keyword(s):  
Convergent Evolution ◽  
Pollination Syndromes ◽  
Global Pattern ◽  
Effective Pollinator

scholarly journals Megachile sculpturalis, the Giant Resin Bee, overcomes the blossom structure of Sunn Hemp (Crotalaria juncea) that impedes pollination

2016 ◽  
pp. 1-11 ◽  
Author(s):  
H Glenn Hall ◽  
Laura Avila
Keyword(s):  
Cover Crop ◽  
Exotic Plant ◽  
Crotalaria Juncea ◽  
Optimal Position ◽  
Large Size ◽  
The Family ◽  
Sunn Hemp ◽  
And Behavior ◽  
Effective Pollinators ◽  
Effective Pollinator

Bee species that are effective pollinators of sunn hemp (Crotalaria juncea L.: Fabaceae: Crotalarieae) are few in number because of the large size and papilionaceous structure of the plant’s blossom.  Seed for this potentially valuable cover crop is largely unavailable due to the paucity of pollinators and to the plant’s self-incompatibility.  The introduced Megachile (Callomegachile) sculpturalis Smith (Megachilidae: Megachilinae), the giant resin bee, has the anatomy and behavior to be a most effective pollinator.  While holding onto the upper vexillum petal of the blossom with her mandibles, this bee has the strength to depress the lower keel causing pollen to be expelled by the style through the small opening at the end.  The bee is long enough for its metasoma to extend over the end of the keel, and, as a member of the family Megachilidae, has scopal hairs on the venter of the metasoma, which are thus in an optimal position to contact the pollen.  Honey bees (Apis mellifera L.: Apidae) are common visitors to sunn hemp flowers but are too small to be effective pollinators.  A honey bee worker robs the pollen by inserting her proboscis into the end of the keel and extracting the adhering pollen.  Possible problems could result from mutual enhancement of populations of an exotic bee and an exotic plant.

The swift parrot Lathamus discolor (Psittacidae), social bees (Apidae), and native insects as pollinators of Eucalyptus globulus ssp. globulus (Myrtaceae)

2004 ◽  
Vol 52 (3) ◽  
pp. 371 ◽  
Author(s):  
A. B. Hingston ◽  
B. M. Potts ◽  
P. B. McQuillan
Keyword(s):  
Eucalyptus Globulus ◽  
Seed Set ◽  
Bombus Terrestris ◽  
Pollination Services ◽  
Social Bees ◽  
Single Flower ◽  
Fitness Benefits ◽  
The Cost ◽  
Effective Pollinator ◽  
Better Than

It has been argued that the production of sufficient nectar to attract bird pollinators would evolve if the fitness benefits accruing from pollination services by birds, compared with insects, outweighed the cost of increased allocation of photosynthate to nectar. This hypothesis implies that the pollination services provided by birds must be considerably better than those provided by insects with which the plant has evolved. Consistent with this, we found that the endangered native swift parrot Lathamus discolor (Shaw) was a very effective pollinator of the native tree Eucalyptus globulus Labill. in Tasmania, facilitating an average of 76% of the maximum possible seed set for open-pollinated flowers in just one visit to a flower, whereas single flower visits by native insects did not facilitate any seed production. Flowers visited once by either species of introduced social bees, the honeybee Apis mellifera L. or the bumblebee Bombus terrestris (L.), produced less than 7% of the maximum possible seed set for open-pollinated flowers. Hence, easily managed social bees appear to be poor substitutes for bird pollinators in commercial seed orchards of this tree. We propose three possible reasons why this largely bird-pollinated tree has not evolved characters that deter insects from removing nectar.

scholarly journals Reproductive ecology of two pioneer legumes in a coastal plain degraded by sand mining

Hoehnea ◽  
2018 ◽  
Vol 45 (1) ◽  
pp. 93-102 ◽  
Author(s):  
Adriana de Oliveira Fidalgo ◽  
Débora Marcouizos Guimarães ◽  
Gabriela Toledo Caldiron ◽  
José Marcos Barbosa
Keyword(s):  
Coastal Plain ◽  
Rainy Season ◽  
Pollen Limitation ◽  
Breeding Systems ◽  
Sand Mining ◽  
Male And Female ◽  
Paulo State ◽  
Bombus Morio ◽  
Effective Pollinator ◽  
Frequent Visitor

ABSTRACT The present study evaluates and compares the phenology, pollination biology and breeding systems of Chamaecrista desvauxii (Collad.) Killip.and Clitoria laurifolia Poir. in a coastal plain degraded by sand mining in São Paulo State, Brazil, from January 2006 to May 2008. Flowering and fruiting events occurred in the warm and rainy season. Both species are self-compatible but only C. desvauxii was pollinator-dependent to set fruits. A small group of bees, comprising Eufrisea sp., Eulaema (Apeulaema) cingulata and Bombus morio, accessed the male and female floral structures and moved among individuals resulting in cross-pollinations. However, only B. morio was a frequent visitor and an effective pollinator. Although recruitment and survival of population in the study area are high for both species, we observed lower abundance and richness of visitors suggesting the possible lack of pollinators and pollen limitation.

scholarly journals Melitofilia em Canavalia rosea (Sw.) DC. (Leguminosae-Papilionoideae)

2010 ◽  
Vol 3 (3) ◽  
pp. 73-76 ◽  
Author(s):  
Fábio de Castro Verçoza ◽  
Elaine Conceição Do Nascimento ◽  
Izabel Maria Ribeiro Côrtes
Keyword(s):  
Apis Mellifera ◽  
Environmental Protection ◽  
Floral Biology ◽  
Environmental Protection Area ◽  
Tetragonisca Angustula ◽  
Protection Area ◽  
Floral Visitors ◽  
Western Zone ◽  
Ease Of Access ◽  
Effective Pollinator

Este trabalho teve como objetivo estudar a polinização de Canavalia rosea (Sw.) DC. (Leguminosae-Papilionoideae) por abelhas na vegetação de restinga da Área de Proteção Ambiental de Grumari, localizada na zona oeste do município do Rio de Janeiro. O estudo foi desenvolvido entre os meses de junho de 2008 a junho de 2009, realizando-se observações sobre morfologia, cor e odor das flores da espécie. Foi registrado o número de flores abertas por dia em cada indivíduo, bem como as etapas de abertura, determinando-se o período da antese. A ocorrência de visitantes florais foi registrada observando-se o horário de visita, a adaptabilidade para polinização, a facilidade de acesso à recompensa e o comportamento intra-floral desempenhado. C. rosea ocorre nas comunidades psamófila e pós-praia da restinga da APA de Grumari. Apresenta características típicas da melitofilia (polinização por abelhas) e as flores são polinizadas por Xylocopa frontalis Oliver. São ainda visitas por Tetragonisca angustula Latreille, Trigona spinipes Fabricius e Apis mellifera Linnaeus, que recolhem pólen sem polinizar as flores. X. frontalis mostrou ser o único polinizador efetivo de C. rosea na restinga de Grumari, tornando a planta diretamente dependente desta espécie para produção de frutos e sementes nesta localidade. Mellitophily in Canavalia rosea (Sw.) DC. (Leguminosae-Papilionoideae) Abstract. This work aimed to study the floral biology and the pollination’s ecology of Canavalia rosea (Sw.) DC. (Leguminosae-Papilionoideae) by bees in the sandbank vegetation of the Grumari Environmental Protection Area (EPA) , located in the western zone of Rio de Janeiro’s city. The study was developed between the months of June of 2008 to June of 2009. Sampling on morphology, color and odor of the flowers of the species were made. The number of open flowers per day in each individual was recorded, as well as the opening steps, determining the period of anthesis. The occurrence of floral visitors was recorded through the observation of the visit’s time, of the adaptability for pollination, of the ease of access to the reward and of the intra-floral behavior played. C. rosea occurs in psamophily communities and in post-beach sandbank of Grumari’s EPA. It presents typical characteristics of mellitophily (pollination by bees) and the flowers are pollinated by Xylocopa frontalis Oliver. It also receives visits from Tetragonisca angustula Latreille, Trigona spinipes Fabricius and Apis mellifera Linnaeus, which collects pollen without pollinating the flowers. X. frontalis proved to be the only effective pollinator of C. rosea in the Grumari sandbank, making the plant directly dependent on this species for fruit and seed’s production in this location.

scholarly journals A meta-analysis of single visit pollination effectiveness

2021 ◽  
Author(s):  
Maureen L Page ◽  
Charlie C Nicholson ◽  
Ross Brennan ◽  
Anna Britzman ◽  
Jeremy Hemberger ◽  
...  
Keyword(s):  
Crop Production ◽  
Meta Analysis ◽  
Crop Plants ◽  
Single Visit ◽  
Pollination Effectiveness ◽  
Visitation Frequency ◽  
Floral Visitors ◽  
The Difference ◽  
Effective Pollinators ◽  
Effective Pollinator

Many animals provide essential ecosystem services in the form of plant pollination. A rich literature documents considerable variation in the single visit pollination effectiveness of different plant visitors, but this literature has yet to be comprehensively synthesized. We conducted a hierarchical meta-analysis of 193 studies and extracted 1716 single visit effectiveness (SVE) comparisons for 252 plant species. We paired SVE data with visitation frequency data for 75 of these studies. Given the global dominance of honeybees in pollinator communities, we used these data to ask: 1) Do honeybees (Apis mellifera) and other floral visitors vary in their SVE?; 2) To what extent do plant and pollinator attributes predict the difference in SVE between honeybees and other visitors?; and 3) Is there a correlation between floral visitation frequency and SVE? We found that honeybees were significantly less effective than the most effective non-honeybee pollinator. Although not significantly different, honeybees also tended to be less effective than the mean community effectiveness. Honeybees were less effective as pollinators of crop plants and when compared to birds and other bees. Visitation frequency and pollination effectiveness were positively correlated, but this trend was largely driven by data from communities where honeybees were absent, suggesting that honeybees generally combine high visitation frequency and lower SVE. Our study demonstrates that non-honeybee floral visitors are highly effective pollinators of many crop and non-crop plants. While the high visitation frequency typically displayed by honeybees undoubtably makes them important pollinators, we show that honeybees are slightly less effective than the average pollinator and rarely the most effective pollinator of the plants they visit. As such, honeybees may be imperfect substitutes for the loss of wild pollinators and safeguarding global crop production will benefit from conservation of non-honeybee taxa.

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