Bees in a Heat Island: Bee Assemblages on Cercis canadensis and Cornus florida in Urban and Exurban Sites

The predicted effects of climate change on pollination processes are multiple, including earlier blooming times and decoupling from pollinators. Yet, little research has been conducted, especially in urban areas where the heat island effect is known to speed up warming. Our aim is to investigate wh...

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Main Authors: Gerardo R. Camilo, Nina S. Fogel, Jenny C. Mullikin, Alan Moss, Retha M. Edens-Meier, Peter Bernhardt
Format: Article
Language:English
Published: Enviroquest Ltd. 2025-05-01
Series:Journal of Pollination Ecology
Subjects:
Online Access:https://pollinationecology.org/index.php/jpe/article/view/822
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author Gerardo R. Camilo
Nina S. Fogel
Jenny C. Mullikin
Alan Moss
Retha M. Edens-Meier
Peter Bernhardt
author_facet Gerardo R. Camilo
Nina S. Fogel
Jenny C. Mullikin
Alan Moss
Retha M. Edens-Meier
Peter Bernhardt
author_sort Gerardo R. Camilo
collection DOAJ
description The predicted effects of climate change on pollination processes are multiple, including earlier blooming times and decoupling from pollinators. Yet, little research has been conducted, especially in urban areas where the heat island effect is known to speed up warming. Our aim is to investigate which bee species visit two native, vernal-blooming tree species with continuous distributions from urban to exurban sites. In 2019 and 2020, we collected bees on the native, mass-flowering Cercis canadensis and Cornus florida in the St. Louis metropolitan and exurban areas in Missouri, USA. A total of 434 bees carrying pollen were collected identifying 54 species representing five families. An additional 123 specimens which did not carry any pollen at all were captured representing 37 species within five families. We observed a greater species diversity among pollen carrying bees at exurban sites while the numbers of male bees collected were proportionately higher in urban versus exurban sites. Although flowering periods of the two tree species overlapped, the pollen of both tree species was identified on only 34 bees.
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institution Kabale University
issn 1920-7603
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publishDate 2025-05-01
publisher Enviroquest Ltd.
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series Journal of Pollination Ecology
spelling doaj-art-a7c03c42e6d044e2a4d653d0794d4c2f2025-08-20T03:49:41ZengEnviroquest Ltd.Journal of Pollination Ecology1920-76032025-05-0110.26786/1920-7603(2025)822Bees in a Heat Island: Bee Assemblages on Cercis canadensis and Cornus florida in Urban and Exurban SitesGerardo R. Camilohttps://orcid.org/0000-0002-2360-5235Nina S. Fogelhttps://orcid.org/0000-0002-8065-2150Jenny C. MullikinAlan MossRetha M. Edens-Meierhttps://orcid.org/0000-0002-7668-1469Peter Bernhardthttps://orcid.org/0009-0001-9190-4018 The predicted effects of climate change on pollination processes are multiple, including earlier blooming times and decoupling from pollinators. Yet, little research has been conducted, especially in urban areas where the heat island effect is known to speed up warming. Our aim is to investigate which bee species visit two native, vernal-blooming tree species with continuous distributions from urban to exurban sites. In 2019 and 2020, we collected bees on the native, mass-flowering Cercis canadensis and Cornus florida in the St. Louis metropolitan and exurban areas in Missouri, USA. A total of 434 bees carrying pollen were collected identifying 54 species representing five families. An additional 123 specimens which did not carry any pollen at all were captured representing 37 species within five families. We observed a greater species diversity among pollen carrying bees at exurban sites while the numbers of male bees collected were proportionately higher in urban versus exurban sites. Although flowering periods of the two tree species overlapped, the pollen of both tree species was identified on only 34 bees. https://pollinationecology.org/index.php/jpe/article/view/822BeesCercis canadensisCornus floridaHeat Island EffectPollen LoadUrban-Exurban Gradient
spellingShingle Gerardo R. Camilo
Nina S. Fogel
Jenny C. Mullikin
Alan Moss
Retha M. Edens-Meier
Peter Bernhardt
Bees in a Heat Island: Bee Assemblages on Cercis canadensis and Cornus florida in Urban and Exurban Sites
Journal of Pollination Ecology
Bees
Cercis canadensis
Cornus florida
Heat Island Effect
Pollen Load
Urban-Exurban Gradient
title Bees in a Heat Island: Bee Assemblages on Cercis canadensis and Cornus florida in Urban and Exurban Sites
title_full Bees in a Heat Island: Bee Assemblages on Cercis canadensis and Cornus florida in Urban and Exurban Sites
title_fullStr Bees in a Heat Island: Bee Assemblages on Cercis canadensis and Cornus florida in Urban and Exurban Sites
title_full_unstemmed Bees in a Heat Island: Bee Assemblages on Cercis canadensis and Cornus florida in Urban and Exurban Sites
title_short Bees in a Heat Island: Bee Assemblages on Cercis canadensis and Cornus florida in Urban and Exurban Sites
title_sort bees in a heat island bee assemblages on cercis canadensis and cornus florida in urban and exurban sites
topic Bees
Cercis canadensis
Cornus florida
Heat Island Effect
Pollen Load
Urban-Exurban Gradient
url https://pollinationecology.org/index.php/jpe/article/view/822
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