Angraecoid Orchids and Hawkmoths in Central Madagascar: Specialized Pollination Systems and Generalist Foragers

Biotropica ◽  
1987 ◽  
Vol 19 (4) ◽  
pp. 310 ◽  
Author(s):  
L. Aners Nilsson ◽  
Lars Johnsson ◽  
Lydia Ralison ◽  
Emile Randrianjohany
Keyword(s):  
Angraecoid Orchids ◽  
Pollination Systems

Temporal organization among pollination systems in a tropical seasonal forest

2021 ◽  
Vol 108 (4) ◽  
Author(s):  
Julieta Genini ◽  
Paulo R. Guimarães ◽  
Marlies Sazima ◽  
Ivan Sazima ◽  
Leonor Patrícia Cerdeira Morellato
Keyword(s):  
Temporal Organization ◽  
Tropical Seasonal Forest ◽  
Pollination Systems

scholarly journals Selective attraction in bird-pollinated flowers. A commentary on: ‘Red flowers differ in shades between pollination systems and across continents’

2020 ◽  
Vol 126 (5) ◽  
pp. iv-v
Author(s):  
Klaus Lunau ◽  
Sarah Gerten
Keyword(s):  
Pollination Systems

This article comments on: Zhe Chen, Yang Niu, Chang-Qiu Liu and Hang Sun, Red flowers differ in shades between pollination systems and across continents, Annals of Botany, Volume 126, Issue 5, 9 October 2020, Pages 837–848, https://doi.org/10.1093/aob/mcaa103

Exotic insect pollinators and native pollination systems

Plant Ecology ◽  
2021 ◽  
Author(s):  
Scott Debnam ◽  
Agustin Saez ◽  
Marcelo A. Aizen ◽  
Ragan M. Callaway
Keyword(s):  
Insect Pollinators ◽  
Pollination Systems

 A new genus of angraecoid orchids (Orchidaceae: Angraecinae) with highly distinctive pollinaria morphology, including three new species from tropical West and Central Africa

Phytotaxa ◽  
2018 ◽  
Vol 373 (2) ◽  
pp. 99
Author(s):  
PASCAL DESCOURVIÈRES ◽  
JOÃO N. M. FARMINHÃO ◽  
VINCENT DROISSART ◽  
JEAN-YVES DUBUISSON ◽  
MURIELLE SIMO-DROISSART ◽  
...  
Keyword(s):  
New Species ◽  
New Genus ◽  
Conservation Status ◽  
Central Africa ◽  
Iucn Red List ◽  
Valid Species ◽  
Preliminary Assessment ◽  
West And Central Africa ◽  
Three New Species ◽  
Angraecoid Orchids

A recent large phylogenetic tree for the angraecoid orchids has shown that the Afrotropical genus Diaphananthe is polyphyletic with a small group of four species sister to Aerangis and Eurychone. These species have diagnostic morphological features different from any other angraecoids, notably an erose to fringed surface of the stipes and a calceiform viscidium. Diaphananthe quintasii, which has been regarded as conspecific with D. rohrii, is reinstated as a valid species and lectotypified, and Diaphananthe alfredii and Rhipidoglossum magnicalcar are put in synonymy under D. quintasii. To accommodate this group of species, along with three new taxa from West and Central Africa, a new genus named Kylicanthe is here described. Four new combinations are thus proposed, and K. bueae is chosen as the type species of the new genus and neotypified. Additionally, K. arcuata, K. cornuata, and K. perezverae are described as new species. An identification key for Kylicanthe and allied genera is presented, as well as one for the seven species in the genus. Notes on ecology and distribution in addition to a preliminary assessment of conservation status following the IUCN Red List are also provided.

scholarly journals Pollination Efficiency and the Evolution of Specialized Deceptive Pollination Systems

2010 ◽  
Vol 175 (1) ◽  
pp. 98-105 ◽  
Author(s):  
Giovanni Scopece ◽  
Salvatore Cozzolino ◽  
Steven D. Johnson ◽  
Florian P. Schiestl
Keyword(s):  
Pollination Efficiency ◽  
Deceptive Pollination ◽  
Pollination Systems

scholarly journals Precision management of pollination services to blueberry crops

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
P. Cavigliasso ◽  
P. Negri ◽  
M. Viel ◽  
M. M. Graziani ◽  
C. Challiol ◽  
...  
Keyword(s):  
Key Management ◽  
Fruit Production ◽  
Fruit Weight ◽  
Strength Distribution ◽  
Pollination Services ◽  
Precision Management ◽  
Fruit Productivity ◽  
Account Due ◽  
Pollination Systems ◽  
Large Groups

AbstractWhile the cultivated area of pollinator-dependent crops is increasing, pollinator availability is decreasing, leading to problems in many agroecosystems. For this reason, pollinator-dependent crop growers often rent beehives to support their pollination requirements to sustain fruit productivity. However, the efficiency of those pollination systems has not been extensively studied. Here, we compared the effect of “precision” pollination (i.e., application of pesticides coordinated with growers, audit of hives, dietary supplementation and individual distribution of hives) with conventional practices (i.e., pesticides applications without coordination with growers and no audit of hives, low maintenance of hives and hives distributed in large groups) on the mean level of pollination and fruit production and quality in blueberry crops. In nine blueberry fields, we measured bee visitation rate to flowers, fruit set, fruit firmness and fruit weight. On average, precision-pollinated plots had 70% more bee visits to flowers and produced 13% more fruits that were 12% heavier and 12% firmer than those obtained through conventional practices. These results showed that pollination efficiency could be improved if key management related to bee strength, distribution and health care are taken into account. Due to these results, we encourage growers and beekeepers to include precision pollination practices to both increase the productivity of blueberry fields and the wellbeing of honey bees within agroecosystems.

scholarly journals Bumblebee Preadators Reduce Pollinator Density and Plant Fitness

2004 ◽  
Vol 28 ◽  
pp. 94-97
Author(s):  
Reuven Dukas
Keyword(s):  
Food Reward ◽  
Fruit Set ◽  
Field Work ◽  
Pollination Biology ◽  
Food Sources ◽  
Plant Fitness ◽  
Predatory Activity ◽  
Selective Agents ◽  
Flower Visiting ◽  
Pollination Systems

Research in pollination biology has focused on the interactions between animals and the flowers they visit for food reward. However, other selective agents, including predators, seed feeders and herbivores, may affect pollination systems. Because flowers are predictable food sources for a variety of species, flowers are also reliable sites at which predators can locate flower-visiting animals. Prominent among pollinators' predators are beewolves (Philanthus spp), common sphecid wasps (Sphecidae) that prey almost exclusively on bees. My field work over three years indicates, first, that an area of approximately 50 square km surrounding a single bumblebee wolf (Philanthus bicinctus) aggregation had a low bumblebee (Bombus spp) density caused by intense predation by the wasps, and, second, that fruit set of the bumblebee pollinated western monkshood (Aconitum columbianum) was significantly lower at locations and times of bumblebee wolf activity than at control locations and times with no such predatory activity. These results indicate that predation can sometimes alter plant­pollinator interactions.

scholarly journals Pollination by nectar-foraging thynnine wasps in the endangered Caladenia arenaria and Caladenia concolor (Orchidaceae)

2019 ◽  
Vol 67 (7) ◽  
pp. 490 ◽  
Author(s):  
Noushka Reiter ◽  
Björn Bohman ◽  
Marc Freestone ◽  
Graham R. Brown ◽  
Ryan D. Phillips
Keyword(s):  
Threatened Species ◽  
Single Species ◽  
Orchid Species ◽  
Late Afternoon ◽  
Nectar Foraging ◽  
Pollinator Species ◽  
Floral Visitors ◽  
Pollination Strategy ◽  
Pollination Systems

Prior to undertaking conservation translocations of plants with specialised pollination systems, it is important to ensure the presence of pollinators at recipient sites. Here, for two threatened species, Caladenia concolor Fitzg. and Caladenia arenaria Fitzg. (Orchidaceae), we determine (i) the pollination strategy used, (ii) which floral visitors are involved in pollination, and (iii) whether the pollinator species are present at potential translocation sites. For both orchid species, pollination was primarily achieved by nectar-foraging thynnine wasps, with a single species responsible for pollination in C. concolor, whereas C. arenaria utilised at least two species to achieve pollination. Both orchid species secreted meagre quantities of sucrose on the upper surface of the labellum. Visits to C. concolor occurred primarily in the late afternoon, with some wasps perching on the flowers overnight. Surveys revealed that pollinators were present at all extant populations and most potential translocation sites for both orchids. The specialisation on one pollinator species in C. concolor means that the distribution of the pollinator needs to be considered for conservation translocations. With C. arenaria, the risk of hybridisation with other Caladenia that are known to share one of its pollinator species needs to be taken into account when selecting translocation sites.

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