scholarly journals Pollinator effectiveness in a composite: a specialist bee pollinates more florets but does not move pollen farther than other visitors

2019 ◽  
Vol 106 (11) ◽  
pp. 1487-1498 ◽  
Author(s):  
Maureen L. Page ◽  
Jennifer L. Ison ◽  
Alison L. Bewley ◽  
Keaton M. Holsinger ◽  
Andrew D. Kaul ◽  
...  
Keyword(s):  
Pollinator Effectiveness

scholarly journals Pollinator importance networks illustrate the crucial value of bees in a highly speciose plant community

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Gavin Ballantyne ◽  
Katherine C. R. Baldock ◽  
Luke Rendell ◽  
P. G. Willmer
Keyword(s):  
Plant Species ◽  
Community Level ◽  
Taxonomic Resolution ◽  
Pollen Deposition ◽  
Pollinator Effectiveness ◽  
Flower Visitors ◽  
Pollinator Importance ◽  
Visitation Frequency ◽  
Pollinator Performance ◽  
Number Of Plant Species

AbstractAccurate predictions of pollination service delivery require a comprehensive understanding of the interactions between plants and flower visitors. To improve measurements of pollinator performance underlying such predictions, we surveyed visitation frequency, pollinator effectiveness (pollen deposition ability) and pollinator importance (the product of visitation frequency and effectiveness) of flower visitors in a diverse Mediterranean flower meadow. With these data we constructed the largest pollinator importance network to date and compared it with the corresponding visitation network to estimate the specialisation of the community with greater precision. Visitation frequencies at the community level were positively correlated with the amount of pollen deposited during individual visits, though rarely correlated at lower taxonomic resolution. Bees had the highest levels of pollinator effectiveness, with Apis, Andrena, Lasioglossum and Osmiini bees being the most effective visitors to a number of plant species. Bomblyiid flies were the most effective non-bee flower visitors. Predictions of community specialisation (H2′) were higher in the pollinator importance network than the visitation network, mirroring previous studies. Our results increase confidence in existing measures of pollinator redundancy at the community level using visitation data, while also providing detailed information on interaction quality at the plant species level.

Types of Flower Visitors: Syndromes, Constancy, and Effectiveness

2011 ◽  
Author(s):  
Pat Willmer
Keyword(s):  
Adaptive Radiation ◽  
Convergent Evolution ◽  
Pollination Syndromes ◽  
Pollinator Effectiveness ◽  
Flower Constancy ◽  
Flower Visitors ◽  
Floral Constancy ◽  
Effective Pollinators

This chapter examines pollination syndromes, floral constancy, and pollinator effectiveness. Flowers show enormous adaptive radiation, but the same kind of flower reappears by convergent evolution in many different families. Thus many families produce rather similar, simple bowl-shaped flowers like buttercups; many produce similar zygomorphic tubular lipped flowers; and many produce fluffy flower heads of massed (often white) florets. These broad flower types are the basis of the idea of pollination syndromes—the flowers have converged on certain morphologies and reward patterns because they are exploiting the abilities and preferences of particular kinds of visitor. After providing an overview of pollination syndromes, the chapter explains why pollination syndromes can be defended. It then considers flower constancy, along with the distinction between flower visitors and effective pollinators. It concludes with some observations on how flower visitors can contribute to speciation of plants through specialization and through their constancy.

scholarly journals Pollinator effectiveness of a specialist bee exploiting a generalist plant—tracking pollen transfer by Heriades truncorum with quantum dots

Apidologie ◽  
2019 ◽  
Vol 51 (2) ◽  
pp. 201-211 ◽  
Author(s):  
Sabine Konzmann ◽  
Margareta Kluth ◽  
Deniz Karadana ◽  
Klaus Lunau
Keyword(s):  
Quantum Dots ◽  
Reproductive Success ◽  
Pollen Germination ◽  
Pollen Grains ◽  
Pollen Transfer ◽  
Pollinator Effectiveness ◽  
Flower Constancy ◽  
Single Visit ◽  
Heriades Truncorum ◽  
Open Control

AbstractHeriades truncorum (Megachilidae) is a specialist bee that forages on Asteraceae and collects pollen by tapping its abdomen on pollen-presenting florets which places the grains directly in the ventral scopa. We tracked pollen transfer by female H. truncorum between conspecific inflorescences of Inula ensifolia and Pulicaria dysenterica by labelling pollen with quantum dots. On average, bees transferred 31.14 (I. ensifolia) and 9.96 (P. dysenterica) pollen grains from the last visited inflorescence, 39% and 45% of which were placed on receptive styles. Pollen germination ratio is significantly lower for inflorescences of P. dysenterica visited by one H. truncorum (0.13%) compared with open control inflorescences (0.51%), which suggests that the bees mainly transfer self-pollen of these self-incompatible plants. Thus, a single visit by H. truncorum does not grant the plant high reproductive success, but the bees’ abundance and flower constancy might reduce this disadvantage.

POLLINATOR EFFECTIVENESS AND SEED SET IN POPULATIONS OF AGALINIS STRICTIFOLIA (SCROPHULARIACEAE)

1992 ◽  
Vol 79 (9) ◽  
pp. 1018-1023 ◽  
Author(s):  
Gregg Dieringer
Keyword(s):  
Seed Set ◽  
Pollinator Effectiveness

scholarly journals Floral biology and a pollinator effectiveness test of the diurnal floral visitors of Tabernaemontana undulata Vahl. (Apocynaceae) in the understory of Amazon Rainforest, Brazil

2011 ◽  
Vol 25 (2) ◽  
pp. 380-386 ◽  
Author(s):  
Thaysa Nogueira de Moura ◽  
Antonio Carlos Webber ◽  
Liliane Noemia Melo Torres
Keyword(s):  
Relative Abundance ◽  
Floral Biology ◽  
Fruit Production ◽  
Primary Forest ◽  
Pollinator Effectiveness ◽  
Indirect Measure ◽  
Flower Visitors ◽  
Functional Regions ◽  
Disturbed Area ◽  
Floral Visitor

In this paper we examined the floral biology, per-visit effectiveness, frequency of visits and relative abundance of the diurnal floral visitor taxa of T. undulata (Apocynaceae) at two populations located in the primary forest and in a disturbed area connected to the continuous forest. Its hermaphrodite flowers show a long and narrow floral tube and introrse anthers form a cone around the apex of the style head where the pollen is deposited. The stigmatic head has three functional regions, in a complex pollination mechanism favoring cross-pollination. In the pollinator censuses conducted in the primary forest population we registered Eulaema bombiformis. In the disturbed area Euglossa sp. was responsible for visits on T. undulata fl owers. Eulaema bombiformis was not absent in the disturbed area, but preferred to forage on pollen and nectar-rich flowers of two neighboring flowering species. In the primary forest, T. undulata was the only fl owering treelet at the end of the dry season. Signifi cant differences were not observed regarding the frequency of visits and relative abundance among the diurnal flower visitors at both sites. In the per-visit effectiveness experiment among flower visitors, we observed one fruit produced aft er E. bombiformis' visits. Due to the complex breeding system of T. undulata in that it is characterized by very low fruit production even under natural conditions, an indirect measure of pollinator effectiveness is needed in at a future stage of this study in order to clarify the role of these bee species as pollinators of T. undulata.

Reproduction of Erythronium umbilicatum (Liliaceae): pollination success and pollinator effectiveness

Oecologia ◽  
1983 ◽  
Vol 59 (2-3) ◽  
pp. 351-359 ◽  
Author(s):  
Alexander F. Motten
Keyword(s):  
Pollinator Effectiveness ◽  
Pollination Success

Variation in pollinator effectiveness in swamp milkweed, Asclepias incarnata (Apocynaceae)

2003 ◽  
Vol 90 (2) ◽  
pp. 214-225 ◽  
Author(s):  
C. T. Ivey ◽  
P. Martinez ◽  
R. Wyatt
Keyword(s):  
Pollinator Effectiveness

RELATIVE POLLINATOR EFFECTIVENESS AND EVOLUTION OF FLORAL TRAITS IN SPATHIPHYLLUM FRIEDRICHSTHALII (ARACEAE)

1986 ◽  
Vol 73 (12) ◽  
pp. 1665-1676 ◽  
Author(s):  
Arlee M. Montalvo ◽  
James D. Ackerman
Keyword(s):  
Floral Traits ◽  
Pollinator Effectiveness
Sign in / Sign up

Export Citation Format

Share Document