scholarly journals How are pollinators guided by colourful floral structures? A commentary on: ‘The role of pollinator preference in the maintenance of pollen colour variation’

2019 ◽  
Vol 123 (6) ◽  
pp. iv-vi ◽  
Author(s):  
Natalie Hempel de Ibarra ◽  
Hema Somanathan
Keyword(s):  
Colour Variation ◽  
Pollinator Preference ◽  
Pollen Colour

This article comments on: Jennifer L. Ison, Elizabeth S. L. Tuan, Matthew H. Koski, Jack S. Whalen and Laura F. Galloway. 2019. The role of pollinator preference in the maintenance of pollen colour variation. Annals of Botany 123(6): 951–960.

scholarly journals The role of pollinator preference in the maintenance of pollen colour variation

2018 ◽  
Vol 123 (6) ◽  
pp. 951-960 ◽  
Author(s):  
Jennifer L Ison ◽  
Elizabeth S L Tuan ◽  
Matthew H Koski ◽  
Jack S Whalen ◽  
Laura F Galloway
Keyword(s):  
Colour Variation ◽  
Pollinator Preference ◽  
Pollen Colour

scholarly journals Morphological and plumage colour variation in the Réunion grey white-eye (Aves:Zosterops borbonicus): assessing the role of selection

2014 ◽  
Vol 114 (2) ◽  
pp. 459-473 ◽  
Author(s):  
Josselin Cornuault ◽  
Boris Delahaie ◽  
Joris A. M. Bertrand ◽  
Yann X. C. Bourgeois ◽  
Borja Milá ◽  
...  
Keyword(s):  
Plumage Colour ◽  
Colour Variation

Selection on quantitative colour variation in Centaurea cyanus : the role of the pollinator's visual system

2013 ◽  
Vol 26 (11) ◽  
pp. 2415-2427 ◽  
Author(s):  
J. P. Renoult ◽  
M. Thomann ◽  
H. M. Schaefer ◽  
P.-O. Cheptou
Keyword(s):  
Visual System ◽  
Colour Variation ◽  
Centaurea Cyanus

scholarly journals Pollinator sharing and gene flow among closely related sympatric dioecious fig taxa

2016 ◽  
Vol 283 (1828) ◽  
pp. 20152963 ◽  
Author(s):  
Gang Wang ◽  
Charles H. Cannon ◽  
Jin Chen
Keyword(s):  
Gene Flow ◽  
Host Recognition ◽  
Floral Volatiles ◽  
Fig Wasps ◽  
Pollinator Species ◽  
Pollinator Preference ◽  
Main Host ◽  
Pollinator Sharing ◽  
Plant Diversification

Hybridization and insect pollination are widely believed to increase rates of plant diversification. The extreme diversity of figs ( Ficus ) and their obligate pollinators, fig wasps (Agaonidae), provides an opportunity to examine the possible role of pollinator-mediated hybridization in plant diversification. Increasing evidence suggests that pollinator sharing and hybridization occurs among fig taxa, despite relatively strict coevolution with the pollinating wasp. Using five sympatric dioecious fig taxa and their pollinators, we examine the degree of pollinator sharing and inter-taxa gene flow. We experimentally test pollinator preference for floral volatiles, the main host recognition signal, from different figs. All five fig taxa shared pollinators with other taxa, and gene flow occurred between fig taxa within and between sections. Floral volatiles of each taxon attracted more than one pollinator species. Floral volatiles were more similar between closely related figs, which experienced higher levels of pollinator sharing and inter-taxa gene flow. This study demonstrates that pollinator sharing and inter-taxa gene flow occurs among closely related sympatric dioecious fig taxa and that pollinators choose the floral volatiles of multiple fig taxa. The implications of pollinator sharing and inter-taxa gene flow on diversification, occurring even in this highly specialized obligate pollination system, require further study.

scholarly journals Male colour variation in a eurytopic African cichlid: the role of diet and hypoxia

2016 ◽  
Vol 118 (3) ◽  
pp. 551-568 ◽  
Author(s):  
Georgia V. McNeil ◽  
Caitlin N. Friesen ◽  
Suzanne M. Gray ◽  
Amalia Aldredge ◽  
Lauren J. Chapman
Keyword(s):  
Colour Variation ◽  
African Cichlid

scholarly journals Associative learning of flowers by generalist bumble bees can be mediated by microbes on the petals

2019 ◽  
Vol 30 (3) ◽  
pp. 746-755 ◽  
Author(s):  
Avery L Russell ◽  
Tia-Lynn Ashman
Keyword(s):  
Microbial Community ◽  
Associative Learning ◽  
Bumble Bees ◽  
Bumble Bee ◽  
Microbial Abundance ◽  
Pollinator Visitation ◽  
Pollinator Preference ◽  
Floral Displays ◽  
Plant Pollinator

Abstract Communication is often vital to the maintenance of mutualisms. In plant-pollinator mutualisms, plants signal pollinators via floral displays, composed of olfactory, visual, and other plant-derived cues. While plants are understood to be associated with microbes, only recently has the role of microbial (yeast and bacteria) inhabitants of flowers as intermediaries of plant-pollinator communication been recognized. Animals frequently use microbial cues to find resources, yet no study has examined whether microbes directly mediate learned and innate pollinator responses. Here, we asked whether microbes on the flower surface, independent of their modification of floral rewards, can mediate these key components of pollinator preference. In the field, we characterized flower and bumble bee microbial abundance, and in laboratory assays we tested whether bumble bees (Bombus impatiens) discriminated flowers on the basis of an experimental floral microbial community on the petals and whether microbe-derived chemicals were effective cues. Learning of microbial community cues was associative and reward context-dependent and mediated by microbial chemicals. Deconstructing the experimental microbial community showed bees innately avoided flowers with bacteria, but were undeterred by yeast. Microbial cues thus potentially facilitate dynamic communication between plants and pollinators such as bumble bees, especially as pollinator visitation can change flower microbiota. We suggest that the study of communication in mutualism generally would benefit by considering not only the multicellular eukaryote partners, but their microbial associates.

scholarly journals Phaeomelanin matters: redness associates with inter-individual differences in behaviour and hormone profiles in male Scops owls (Otus scops)

2020 ◽  
Author(s):  
ANGEL CRUZ MIRALLES ◽  
Jesús M. Avilés ◽  
Olivier Chastel ◽  
Mónica Expósito-Granados ◽  
Deseada Parejo
Keyword(s):  
Individual Differences ◽  
Evolutionary Ecology ◽  
Bird Species ◽  
Pivotal Role ◽  
Phenotypic Integration ◽  
Plumage Colour ◽  
Colour Variation ◽  
Parental Behaviour ◽  
Consistent Variation

Abstract Background: Individuals within populations often show consistent variation in behavioural and physiological traits, which are frequently inter-correlated, potentially leading to phenotypic integration. Understanding the mechanisms behind such integration is a key task in evolutionary ecology, and melanism has been suggested to play a pivotal role. In birds, most of plumage colour variation is determined by two types of melanin, eumelanin and phaeomelanin, but the role of melanin in avian phenotype integration has mostly been analysed in relation to eumelanin. Here we test for covariation between phaeo-melanin-based coloration, behavioural traits (i.e. nest territoriality, response against researchers, breath rate and parental behaviour) and corticosterone profiles in the polymorphic scops owl Otus scops , a bird species in which more phaeomelanic individuals display reddish colorations. Results: In males, we observed differences between red and grey individuals in latency to return to the nest after being disturbed and in feather CORT. Reddish males took longer to return to their nests and showed higher levels of feather CORT than grey ones. Behaviour and CORT profiles did not differ between red and grey females. Conclusions: The found associations between redness, behaviour and CORT in males, but not in females, might suggest the existence of a sex-specific integrated phaeomelanic phenotype, likely due to pleiotropy, in scops owls.

scholarly journals Phaeomelanin matters: Redness associates with inter-individual differences in behaviour and feather corticosterone in male scops owls (Otus scops)

PLoS ONE ◽  
2020 ◽  
Vol 15 (11) ◽  
pp. e0241380
Author(s):  
Ángel Cruz-Miralles ◽  
Jesús M. Avilés ◽  
Olivier Chastel ◽  
Mónica Expósito-Granados ◽  
Deseada Parejo
Keyword(s):  
Individual Differences ◽  
Evolutionary Ecology ◽  
Bird Species ◽  
Phenotypic Integration ◽  
Plumage Colour ◽  
Colour Variation ◽  
Parental Behaviour ◽  
Consistent Variation ◽  
Feather Corticosterone

Individuals within populations often show consistent variation in behavioural and physiological traits which are frequently inter-correlated, potentially leading to phenotypic integration. Understanding the mechanisms behind such integration is a key task in evolutionary ecology, and melanin based colouration has been suggested to play a pivotal role. In birds, most of plumage colour variation is determined by two types of melanin, eumelanin and phaeomelanin, but the role of phaeomelanin in avian phenotype integration has been barely investigated. Here, we test for covariation between phaeomelanin-based colouration, behavioural traits (i.e. nest territoriality, aggressiveness, breath rate and parental behaviour) and corticosterone in feathers in the polymorphic scops owl Otus scops, a bird species in which more phaeomelanic individuals display reddish colourations. In males, we observed that reddish males took longer to return to their nests and showed higher levels of feather CORT than more greyish ones. Behaviour and feather CORT were not associated to plumage colour in females. The found associations between redness, behaviour and feather CORT in males, but not in females, might suggest the existence of a sex-specific integrated phaeomelanic phenotype in scops owls.

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