Krewenka, Kristin M.

[["dc.bibliographiccitation.firstpage","1608"],["dc.bibliographiccitation.issue","6127"],["dc.bibliographiccitation.journal","Science"],["dc.bibliographiccitation.lastpage","1611"],["dc.bibliographiccitation.volume","339"],["dc.contributor.author","Garibaldi, L. A."],["dc.contributor.author","Steffan-Dewenter, I."],["dc.contributor.author","Winfree, R."],["dc.contributor.author","Aizen, M. A."],["dc.contributor.author","Bommarco, R."],["dc.contributor.author","Cunningham, S. A."],["dc.contributor.author","Kremen, C."],["dc.contributor.author","Carvalheiro, L. G."],["dc.contributor.author","Harder, L. D."],["dc.contributor.author","Afik, O."],["dc.contributor.author","Bartomeus, I."],["dc.contributor.author","Benjamin, F."],["dc.contributor.author","Boreux, V."],["dc.contributor.author","Cariveau, D."],["dc.contributor.author","Chacoff, N. P."],["dc.contributor.author","Dudenhöffer, Jan-H."],["dc.contributor.author","Freitas, B. M."],["dc.contributor.author","Ghazoul, J."],["dc.contributor.author","Greenleaf, S."],["dc.contributor.author","Hipolito, J."],["dc.contributor.author","Holzschuh, A."],["dc.contributor.author","Howlett, B."],["dc.contributor.author","Isaacs, R."],["dc.contributor.author","Javorek, S. K."],["dc.contributor.author","Kennedy, C. M."],["dc.contributor.author","Krewenka, K. M."],["dc.contributor.author","Krishnan, S."],["dc.contributor.author","Mandelik, Y."],["dc.contributor.author","Mayfield, M. M."],["dc.contributor.author","Motzke, I."],["dc.contributor.author","Munyuli, T."],["dc.contributor.author","Nault, B. A."],["dc.contributor.author","Otieno, M."],["dc.contributor.author","Petersen, J."],["dc.contributor.author","Pisanty, G."],["dc.contributor.author","Potts, S. G."],["dc.contributor.author","Rader, R."],["dc.contributor.author","Ricketts, T. H."],["dc.contributor.author","Rundlof, M."],["dc.contributor.author","Seymour, C. L."],["dc.contributor.author","Schuepp, C."],["dc.contributor.author","Szentgyorgyi, H."],["dc.contributor.author","Taki, H."],["dc.contributor.author","Tscharntke, T."],["dc.contributor.author","Vergara, C. H."],["dc.contributor.author","Viana, B. F."],["dc.contributor.author","Wanger, T. C."],["dc.contributor.author","Westphal, C."],["dc.contributor.author","Williams, N."],["dc.contributor.author","Klein, A. M."],["dc.date.accessioned","2017-09-07T11:54:48Z"],["dc.date.available","2017-09-07T11:54:48Z"],["dc.date.issued","2013"],["dc.description.abstract","The diversity and abundance of wild insect pollinators have declined in many agricultural landscapes. Whether such declines reduce crop yields, or are mitigated by managed pollinators such as honey bees, is unclear. We found universally positive associations of fruit set with flower visitation by wild insects in 41 crop systems worldwide. In contrast, fruit set increased significantly with flower visitation by honey bees in only 14% of the systems surveyed. Overall, wild insects pollinated crops more effectively; an increase in wild insect visitation enhanced fruit set by twice as much as an equivalent increase in honey bee visitation. Visitation by wild insects and honey bees promoted fruit set independently, so pollination by managed honey bees supplemented, rather than substituted for, pollination by wild insects. Our results suggest that new practices for integrated management of both honey bees and diverse wild insect assemblages will enhance global crop yields."],["dc.identifier.doi","10.1126/science.1230200"],["dc.identifier.gro","3150108"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6838"],["dc.language.iso","en"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","chake"],["dc.relation.issn","0036-8075"],["dc.title","Wild Pollinators Enhance Fruit Set of Crops Regardless of Honey Bee Abundance"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1062"],["dc.bibliographiccitation.issue","10"],["dc.bibliographiccitation.journal","Ecology Letters"],["dc.bibliographiccitation.lastpage","1072"],["dc.bibliographiccitation.volume","14"],["dc.contributor.author","Garibaldi, Lucas A."],["dc.contributor.author","Steffan-Dewenter, Ingolf D."],["dc.contributor.author","Kremen, Claire"],["dc.contributor.author","Morales, Juan M."],["dc.contributor.author","Bommarco, Riccardo"],["dc.contributor.author","Cunningham, Saul A."],["dc.contributor.author","Carvalheiro, Luisa G."],["dc.contributor.author","Chacoff, Natacha P."],["dc.contributor.author","Dudenhoeffer, Jan-Hendrik"],["dc.contributor.author","Greenleaf, Sarah S."],["dc.contributor.author","Holzschuh, Andrea"],["dc.contributor.author","Isaacs, Rufus"],["dc.contributor.author","Krewenka, Kristin M."],["dc.contributor.author","Mandelik, Yael"],["dc.contributor.author","Mayfield, Margaret M."],["dc.contributor.author","Morandin, Lora A."],["dc.contributor.author","Potts, Simon G."],["dc.contributor.author","Ricketts, Taylor H."],["dc.contributor.author","Szentgyoergyi, Hajnalka"],["dc.contributor.author","Viana, Blandina Felipe"],["dc.contributor.author","Westphal, Catrin"],["dc.contributor.author","Winfree, Rachael"],["dc.contributor.author","Klein, Alexandra Maria"],["dc.date.accessioned","2018-11-07T08:51:31Z"],["dc.date.available","2018-11-07T08:51:31Z"],["dc.date.issued","2011"],["dc.description.abstract","Sustainable agricultural landscapes by definition provide high magnitude and stability of ecosystem services, biodiversity and crop productivity. However, few studies have considered landscape effects on the stability of ecosystem services. We tested whether isolation from florally diverse natural and semi-natural areas reduces the spatial and temporal stability of flower-visitor richness and pollination services in crop fields. We synthesised data from 29 studies with contrasting biomes, crop species and pollinator communities. Stability of flower-visitor richness, visitation rate (all insects except honey bees) and fruit set all decreased with distance from natural areas. At 1 km from adjacent natural areas, spatial stability decreased by 25, 16 and 9% for richness, visitation and fruit set, respectively, while temporal stability decreased by 39% for richness and 13% for visitation. Mean richness, visitation and fruit set also decreased with isolation, by 34, 27 and 16% at 1 km respectively. In contrast, honey bee visitation did not change with isolation and represented > 25% of crop visits in 21 studies. Therefore, wild pollinators are relevant for crop productivity and stability even when honey bees are abundant. Policies to preserve and restore natural areas in agricultural landscapes should enhance levels and reliability of pollination services."],["dc.identifier.doi","10.1111/j.1461-0248.2011.01669.x"],["dc.identifier.isi","000294917700011"],["dc.identifier.pmid","21806746"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/21951"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","1461-023X"],["dc.title","Stability of pollination services decreases with isolation from natural areas despite honey bee visits"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","40"],["dc.bibliographiccitation.issue","1-2"],["dc.bibliographiccitation.journal","Agriculture Ecosystems & Environment"],["dc.bibliographiccitation.lastpage","47"],["dc.bibliographiccitation.volume","133"],["dc.contributor.author","Carre, Gabriel"],["dc.contributor.author","Roche, Philip"],["dc.contributor.author","Chifflet, Remy"],["dc.contributor.author","Morison, Nicolas"],["dc.contributor.author","Bommarco, Riccardo"],["dc.contributor.author","Harrison-Cripps, Jenn"],["dc.contributor.author","Krewenka, Kristin M."],["dc.contributor.author","Potts, Simon G."],["dc.contributor.author","Roberts, Stuart P. M."],["dc.contributor.author","Rodet, Guy"],["dc.contributor.author","Settele, Josef"],["dc.contributor.author","Steffan-Dewenter, Ingolf D."],["dc.contributor.author","Szentgyorgyi, Hajnalka"],["dc.contributor.author","Tscheulin, Thomas"],["dc.contributor.author","Westphal, Catrin"],["dc.contributor.author","Woyciechowski, Michal"],["dc.contributor.author","Vaissiere, Bernard E."],["dc.date.accessioned","2018-11-07T11:24:27Z"],["dc.date.available","2018-11-07T11:24:27Z"],["dc.date.issued","2009"],["dc.description.abstract","To better understand the dynamics of bee populations in crops, we assessed the effect of landscape context and habitat type on bee communities in annual entomophilous crops in Europe. We quantified bee communities in five pairs of crop-country: buckwheat in Poland, cantaloupe in France, field beans in the UK, spring oilseed rape in Sweden, and strawberries in Germany. For each country, 7-10 study fields were sampled over a gradient of increasing proportion of semi-natural habitats in the surrounding landscape. The CORINE land cover classification was used to characterize the landscape over a 3 km radius around each study field and we used multivariate and regression analyses to quantify the impact of landscape features on bee abundance and diversity at the sub-generic taxonomic level. Neither overall wild bee abundance nor diversity, taken as the number of sub-genera. was significantly affected by the proportion of semi-natural habitat. Therefore, we used the most precise level of the CORINE classification to examine the possible links between specific landscape features and wild bee communities. Bee community composition fell into three distinct groups across Europe: group I included Poland, Germany, and Sweden, group 2 the UK, and group 3 France. Among all three groups, wild bee abundance and sub-generic diversity were affected by 17 landscape elements including some semi-natural habitats (e.g., transitional wood land-shrub), some urban habitats (e.g., sport and leisure facilities) and some crop habitats (e.g., non-irrigated arable land). Some bee taxa were positively affected by urban habitats only, others by semi-natural habitats only, and others by a combination of semi-natural, urban and crop habitats. Bee sub-genera favoured by urban and crop habitats were more resistant to landscape change than those favoured only by semi-natural habitats. In agroecosystems, the agricultural intensification defined as the loss of semi-natural habitats does not necessarily cause a decline in evenness at the local level, but can change community composition towards a bee fauna dominated by common taxa. (C) 2009 Elsevier B.V. All rights reserved."],["dc.description.sponsorship","EC [GOCE-CT-2003-506675]"],["dc.identifier.doi","10.1016/j.agee.2009.05.001"],["dc.identifier.isi","000268149800006"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/56410"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","1873-2305"],["dc.relation.issn","0167-8809"],["dc.title","Landscape context and habitat type as drivers of bee diversity in European annual crops"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1436"],["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","Journal of Applied Ecology"],["dc.bibliographiccitation.lastpage","1444"],["dc.bibliographiccitation.volume","52"],["dc.contributor.author","Garibaldi, L. A."],["dc.contributor.author","Bartomeus, I."],["dc.contributor.author","Bommarco, R."],["dc.contributor.author","Klein, A. M."],["dc.contributor.author","Cunningham, S. A."],["dc.contributor.author","Aizen, M. A."],["dc.contributor.author","Boreux, V."],["dc.contributor.author","Garratt, M. P. D."],["dc.contributor.author","Carvalheiro, L. G."],["dc.contributor.author","Kremen, C."],["dc.contributor.author","Morales, C. L."],["dc.contributor.author","Schüepp, C."],["dc.contributor.author","Chacoff, N. P."],["dc.contributor.author","Freitas, B. M."],["dc.contributor.author","Gagic, V."],["dc.contributor.author","Holzschuh, A."],["dc.contributor.author","Klatt, B. K."],["dc.contributor.author","Krewenka, K. M."],["dc.contributor.author","Krishnan, S."],["dc.contributor.author","Mayfield, M. M."],["dc.contributor.author","Motzke, I."],["dc.contributor.author","Otieno, M."],["dc.contributor.author","Petersen, J."],["dc.contributor.author","Potts, S. G."],["dc.contributor.author","Ricketts, T. H."],["dc.contributor.author","Rundlöf, M."],["dc.contributor.author","Sciligo, A."],["dc.contributor.author","Sinu, P. A."],["dc.contributor.author","Steffan-Dewenter, I."],["dc.contributor.author","Taki, H."],["dc.contributor.author","Tscharntke, T."],["dc.contributor.author","Vergara, C. H."],["dc.contributor.author","Viana, B. F."],["dc.contributor.author","Woyciechowski, M."],["dc.date.accessioned","2017-09-07T11:53:47Z"],["dc.date.available","2017-09-07T11:53:47Z"],["dc.date.issued","2015"],["dc.identifier.doi","10.1111/1365-2664.12530"],["dc.identifier.gro","3149975"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6692"],["dc.notes.status","public"],["dc.notes.submitter","chake"],["dc.relation.issn","0021-8901"],["dc.title","EDITOR'S CHOICE: REVIEW: Trait matching of flower visitors and crops predicts fruit set better than trait diversity"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","584"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","Ecology Letters"],["dc.bibliographiccitation.lastpage","599"],["dc.bibliographiccitation.volume","16"],["dc.contributor.author","Kennedy, Christina M."],["dc.contributor.author","Lonsdorf, Eric"],["dc.contributor.author","Neel, Maile C."],["dc.contributor.author","Williams, Neal M."],["dc.contributor.author","Ricketts, Taylor H."],["dc.contributor.author","Winfree, Rachael"],["dc.contributor.author","Bommarco, Riccardo"],["dc.contributor.author","Brittain, Claire"],["dc.contributor.author","Burley, Alana L."],["dc.contributor.author","Cariveau, Daniel"],["dc.contributor.author","Carvalheiro, Luisa G."],["dc.contributor.author","Chacoff, Natacha P."],["dc.contributor.author","Cunningham, Saul A."],["dc.contributor.author","Danforth, Bryan N."],["dc.contributor.author","Dudenhoeffer, Jan-Hendrik"],["dc.contributor.author","Elle, Elizabeth"],["dc.contributor.author","Gaines, Hannah R."],["dc.contributor.author","Garibaldi, Lucas A."],["dc.contributor.author","Gratton, Claudio"],["dc.contributor.author","Holzschuh, Andrea"],["dc.contributor.author","Isaacs, Rufus"],["dc.contributor.author","Javorek, Steven K."],["dc.contributor.author","Jha, Shalene"],["dc.contributor.author","Klein, Alexandra Maria"],["dc.contributor.author","Krewenka, Kristin M."],["dc.contributor.author","Mandelik, Yael"],["dc.contributor.author","Mayfield, Margaret M."],["dc.contributor.author","Morandin, Lora A."],["dc.contributor.author","Neame, Lisa A."],["dc.contributor.author","Otieno, Mark"],["dc.contributor.author","Park, Mia"],["dc.contributor.author","Potts, Simon G."],["dc.contributor.author","Rundlof, Maj"],["dc.contributor.author","Saez, Agustin"],["dc.contributor.author","Steffan-Dewenter, Ingolf D."],["dc.contributor.author","Taki, Hisatomo"],["dc.contributor.author","Viana, Blandina Felipe"],["dc.contributor.author","Westphal, Catrin"],["dc.contributor.author","Wilson, Julianna K."],["dc.contributor.author","Greenleaf, Sarah S."],["dc.contributor.author","Kremen, Claire"],["dc.date.accessioned","2018-11-07T09:25:19Z"],["dc.date.available","2018-11-07T09:25:19Z"],["dc.date.issued","2013"],["dc.description.abstract","Bees provide essential pollination services that are potentially affected both by local farm management and the surrounding landscape. To better understand these different factors, we modelled the relative effects of landscape composition (nesting and floral resources within foraging distances), landscape configuration (patch shape, interpatch connectivity and habitat aggregation) and farm management (organic vs. conventional and local-scale field diversity), and their interactions, on wild bee abundance and richness for 39 crop systems globally. Bee abundance and richness were higher in diversified and organic fields and in landscapes comprising more high-quality habitats; bee richness on conventional fields with low diversity benefited most from high-quality surrounding land cover. Landscape configuration effects were weak. Bee responses varied slightly by biome. Our synthesis reveals that pollinator persistence will depend on both the maintenance of high-quality habitats around farms and on local management practices that may offset impacts of intensive monoculture agriculture."],["dc.identifier.doi","10.1111/ele.12082"],["dc.identifier.isi","000318077200003"],["dc.identifier.pmid","23489285"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/30038"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","1461-0248"],["dc.relation.issn","1461-023X"],["dc.title","A global quantitative synthesis of local and landscape effects on wild bee pollinators in agroecosystems"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1816"],["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","Biological Conservation"],["dc.bibliographiccitation.lastpage","1825"],["dc.bibliographiccitation.volume","144"],["dc.contributor.author","Krewenka, Kristin M."],["dc.contributor.author","Holzschuh, Andrea"],["dc.contributor.author","Tscharntke, Teja"],["dc.contributor.author","Dormann, Carsten F."],["dc.date.accessioned","2017-09-07T11:50:54Z"],["dc.date.available","2017-09-07T11:50:54Z"],["dc.date.issued","2011"],["dc.description.abstract","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 Göttingen (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."],["dc.identifier.doi","10.1016/j.biocon.2011.03.014"],["dc.identifier.gro","3149952"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6666"],["dc.language.iso","en"],["dc.notes.status","public"],["dc.relation.issn","0006-3207"],["dc.subject","Grass strips; Hedges; Corridors; Bees; Wasps; Agricultural landscape"],["dc.title","Landscape elements as potential barriers and corridors for bees, wasps and parasitoids"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]