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Road verges are corridors and roads barriers for the movement of flower-visiting insects

Dániel Ferreira, Juliana and Berggren, Åsa and Wissman, Jörgen and Öckinger, Erik (2022). Road verges are corridors and roads barriers for the movement of flower-visiting insects. Ecography :2 , e05847
[Research article]

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Abstract

Roads and road verges can potentially have opposite impacts on organisms that move through the landscape. While road verges can be habitat for a large number of species, and have been proposed to act as dispersal corridors, roads can act as barriers to movement. This duality of roads and road verges has however rarely been assessed simultaneously, and it is unknown to what degree it depends on the amount of traffic on the road and on the habitat quality of the road verge. We used fluorescent powdered dye to track movements of flower-visiting insects along roads with varying traffic intensity, and in verges with contrasting habitat quality (flowering plant species richness and flower density). Insect movements along road verges were more frequent than movements into the adjacent habitats, indicating that verges act as corridors. The frequency of movements that required crossing the road was lower compared to the frequency of movements that did not, suggesting that roads are barriers. The movement patterns were independent of traffic intensity, but the barrier effect was stronger when the road verge had a higher density of flower resources. The effect of roads as a barrier and of the road verges as corridors were independent of each other. Our results suggest that flower-visiting insects tend to remain longer in road verges with high density of flowers and we therefore suggest that managing road verge habitats for an increased plant diversity will mitigate the known negative impacts of roads on insect populations.

Authors/Creators:Dániel Ferreira, Juliana and Berggren, Åsa and Wissman, Jörgen and Öckinger, Erik
Title:Road verges are corridors and roads barriers for the movement of flower-visiting insects
Series Name/Journal:Ecography
Year of publishing :2022
Number:2
Article number:e05847
Number of Pages:11
Publisher:WILEY
ISSN:0906-7590
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
Keywords:bees, butterflies, dispersal, habitats, hoverflies, landscape, linear infrastructure connectivity
URN:NBN:urn:nbn:se:slu:epsilon-p-115197
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-115197
Additional ID:
Type of IDID
DOI10.1111/ecog.05847
Web of Science (WoS)000734791300001
Otherhttps://onlinelibrary.wiley.com/doi/full/10.1111/ecog.05847
Alternative URL:https://onlinelibrary.wiley.com/doi/full/10.1111/ecog.05847
ID Code:27173
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Ecology
(S) > Dept. of Ecology

(NL, NJ) > Swedish Biodiversity Centre
Deposited By: SLUpub Connector
Deposited On:22 Feb 2022 08:25
Metadata Last Modified:22 Feb 2022 08:31

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