Landscape elements as potential barriers and corridors for bees, wasps and parasitoids
By Kristin Krewenka, A. Holzschuh, T. Tscharntke, Carsten F. Dormann. 2011
156 citations recorded by the source corpus.
Habitat loss and fragmentation in agricultural landscapes lead to severe declines of abundance and richness of many insect species in the remaining isolated semi-natural habitats. We analysed possible barrier effects of large hedges and corridor effects of narrow grass strips that were hypothesized to affect foraging and dispersal of hymenopterans. We selected calcareous grasslands in the vicinity of Gottingen (Germany), which harbour high Hymenoptera diversity and are starting points for foraging and dispersal in the landscape. We installed pan traps to sample bees (i) on the grasslands; (ii) on grassland edges behind adjacent hedges (potential barriers) and without hedges; (iii) on grass strips in 100 m distance to the grassland, which were connected or unconnected to the grassland; and (iv) unconnected (isolated) grass strips in 300 m and 750 m distance to test for corridor and isolation effects on abundance and species richness of foraging wild bees. Additionally we provided trap nests for bees, wasps and their parasitoids on the grasslands and the strips. Species abundance and richness declined with increasing isolation from grasslands for foraging solitary bees, trap-nesting bees, wasps and parasitoids, but not for foraging bumblebees. Hedges did not confine movement of foraging bees. We found no mitigating effects of (100 m) corridor strips on any of the observed groups. We conclude that conservation of semi-natural habitats as sources of bee and wasp diversity is important and that grass strips act as sinks rather than corridors when high quality patches are nearby.
Subfields: Ecology, Evolution, Behavior and Systematics, Nature and Landscape Conservation, Plant Science
View Paper: https://www.semanticscholar.org/paper/84fcdb587cf05d792c64786b218bc1918e7d9e82
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Ecology, Evolution, Behavior and Systematics
In Nature and Landscape Conservation
In Plant Science
Citations in the corpus
- Cavity-nest boxes for solitary bees: a century of design and research (2017, background): “…et al. 2008; forest canopy cover: Sobek et al. 2009; heavy metal contamination: Moroń et al. 2012; mass-flowering agricultural crop: Diekötter et al. 2014; urban land use: Fortel et al. 2016) as well as the effects of fragmentation (Klein et al. 2006; Krewenka et al. 2011; Coudrain et al. 2014).”
- Effects of grazing abandonment on functional and taxonomic diversity of Mediterranean grasslands (2012, background): “Species diversity, usually measured as species richness, is the ost widely studied component of biodiversity (Helm et al., 2006; rewenka et al., 2011), although in recent years, there has been a roliferation of the focus on functional diversity (Díaz et al.”
- Local habitat characteristics but not landscape urbanization drive pollinator visitation and native plant pollination in forest remnants (2013, background): “As a result, both pollinator community responses and foraging behavior may differ between the two contexts leading to differential effects of habitat loss on pollination (Cane et al., 2006; Krewenka et al., 2011; Ries and Debinski, 2001; Slagle and Hendrix, 2009).”
- Landscapes with wild bee habitats enhance pollination, fruit set and yield of sweet cherry (2012, unknown): “Natural high-diversity habitats benefit wild bees by providing a variety of nesting sites and alternative flower resources beyond the short mass-flowering periods of crop plants (Krewenka et al., 2011; Roulston and Goodell, 2011).”