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Estimates of accessible food resources for pollinators in urban landscapes should take landscape friction into account

Johansson, Victor and Koffman, Anna and Hedblom, Marcus and Deboni, Giulio and Andersson, Petter (2018). Estimates of accessible food resources for pollinators in urban landscapes should take landscape friction into account. Ecosphere. 9, 1-11
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Abstract

Maintaining biodiversity in urban landscapes requires a well-functioning green infrastructure for the landscape to remain ecologically functional. However, city planners often lack knowledge to identify how well different parts of the green infrastructure are connected, and tools to estimate the accessibility to important habitats for different species in urban areas are strongly needed. We compared the ability of three measures of available food resources, with increasing complexity, for explaining species richness and abundance of bees and wasps at 23 locations in an urban landscape in Sweden. Specifically, we tested (1) the summed amount of food habitat within a buffer circle, (2) the amount of food habitat weighted by distance, and (3) the summed amount of food habitat within an area created by cost-weighted distance based on the surrounding landscape friction. We tested two spatial scales (200 and 400 m). The results show that both the summed (1) and the weighted measures (2) were very poor in explaining species richness and abundance regardless of spatial scale, while we found significant relationships for both species richness and abundance with the friction-based measure (3) at both scales. For the friction-based measure, the relationships with both response variables were strongest at the smallest spatial scale (200 m). We conclude that bees and wasps are sensitive to barriers such as large roads and built-up areas when foraging in urban environments. This is important to consider when assessing the functionality of urban green infrastructure in order to not overestimate the available amount of habitat and how well different parts of the landscape are connected for these important pollinators.

Authors/Creators:Johansson, Victor and Koffman, Anna and Hedblom, Marcus and Deboni, Giulio and Andersson, Petter
Title:Estimates of accessible food resources for pollinators in urban landscapes should take landscape friction into account
Series/Journal:Ecosphere (2150-8925)
Year of publishing :2018
Volume:9
Page range:1-11
Number of Pages:11
Publisher:Wiley
ISSN:2150-8925
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Published version
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
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Landscape Architecture
Keywords:Aculeata, green infrastructure, habitat fragmentation, landscape friction/resistance, road ecology, wild bees
URN:NBN:urn:nbn:se:slu:epsilon-e-5146
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-5146
Additional ID:
Type of IDID
DOI10.1002/ecs2.2486
Web of Science (WoS)000449566200006
ID Code:15804
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
S - Faculty of Forest Sciences
Department:(S) > Dept. of Forest Resource Management
(NL, NJ) > Dept. of Forest Resource Management

(NL, NJ) > Dept. of Ecology
(S) > Dept. of Ecology
Deposited By: SLUpub Connector
Deposited On:18 Dec 2018 08:07
Metadata Last Modified:24 Dec 2018 22:55

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