The matrix affects carabid beetle assemblages in linear urban ruderal habitats

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Prass , M , Vrezec , A , Setala , H & Kotze , D J 2017 , ' The matrix affects carabid beetle assemblages in linear urban ruderal habitats ' , Urban Ecosystems , vol. 20 , no. 5 , pp. 971-981 .

Title: The matrix affects carabid beetle assemblages in linear urban ruderal habitats
Author: Prass, Marju; Vrezec, Al; Setala, Heikki; Kotze, D. Johan
Contributor organization: Environmental Sciences
Heikki Setälä / Principal Investigator
Urban Ecosystems
Date: 2017-10
Language: eng
Number of pages: 11
Belongs to series: Urban Ecosystems
ISSN: 1083-8155
Abstract: Matrix contrasts affect communities in patchy landscapes by influencing resources, abiotic conditions and spill-over effects. However, current knowledge is significantly biased towards forest and rural communities. We examined the effects of three different matrix types, i.e., low, intermediate and high contrasts, on carabid beetle assemblages at urban railway verges in two climatic regions. Study sites were located in Finland and in Slovenia. Using pitfall trapping, non-metric multidimensional scaling and generalised linear mixed models, we investigated carabid assemblages at railway verges and in differently contrasting adjacent matrices, i.e. built-up, grassland and forest. The matrix influenced carabid assemblages at railway verges. Assemblages grouped with adjacent matrix types, although some Finnish railway assemblages included a characteristic set of open dry habitat species. Abundances of generalist species at railway verges were higher when next to grassland or forest than urban matrices. Habitat specialists responded negatively to high contrast matrices, resulting in lower abundances of open habitat specialists in railway verges when next to forests and nearly no spill-over of forest specialists into railway verges. These patterns were consistent in both countries, i.e. irrespective of climatic region. Our study emphasises effects of the adjacent matrix and matrix contrasts on communities in linear open habitat patches in cities. Knowledge on matrix effects in patchy landscapes, such as urban environments, is essential in understanding the distribution and composition of communities in discrete patches. This knowledge can be used in conservation planning. If habitat specialists are negatively affected by high matrix contrasts, high contrasts should be avoided.
Subject: Carabidae
Edge responses
Linear habitats
Matrix contrasts
Matrix effects
1172 Environmental sciences
Peer reviewed: Yes
Rights: unspecified
Usage restriction: openAccess
Self-archived version: acceptedVersion

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