Steffan-Dewenter, Ingolf D.

[["dc.bibliographiccitation.firstpage","153"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","American Journal of Botany"],["dc.bibliographiccitation.lastpage","157"],["dc.bibliographiccitation.volume","90"],["dc.contributor.author","Klein, Alexandra‐Maria"],["dc.contributor.author","Steffan-Dewenter, Ingolf"],["dc.contributor.author","Tscharntke, Teja"],["dc.date.accessioned","2017-09-07T11:50:53Z"],["dc.date.available","2017-09-07T11:50:53Z"],["dc.date.issued","2008"],["dc.identifier.doi","10.3732/ajb.90.1.153"],["dc.identifier.gro","3149938"],["dc.identifier.pmid","21659091"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6650"],["dc.language.iso","en"],["dc.notes.status","zu prüfen"],["dc.relation.issn","0002-9122"],["dc.title","Bee pollination and fruit set of Coffea arabica and C. canephora (Rubiaceae)"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["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","969"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","Ecological Research"],["dc.bibliographiccitation.lastpage","983"],["dc.bibliographiccitation.volume","26"],["dc.contributor.author","Nielsen, Anders"],["dc.contributor.author","Steffan-Dewenter, Ingolf D."],["dc.contributor.author","Westphal, Catrin"],["dc.contributor.author","Messinger, Olivia"],["dc.contributor.author","Potts, Simon G."],["dc.contributor.author","Roberts, Stuart P. M."],["dc.contributor.author","Settele, Josef"],["dc.contributor.author","Szentgyoergyi, Hajnalka"],["dc.contributor.author","Vaissiere, Bernard E."],["dc.contributor.author","Vaitis, Michalis"],["dc.contributor.author","Woyciechowski, Michal"],["dc.contributor.author","Bazos, Ioannis"],["dc.contributor.author","Biesmeijer, Jacobus C."],["dc.contributor.author","Bommarco, Riccardo"],["dc.contributor.author","Kunin, William E."],["dc.contributor.author","Tscheulin, Thomas"],["dc.contributor.author","Lamborn, Ellen"],["dc.contributor.author","Petanidou, Theodora"],["dc.date.accessioned","2018-11-07T08:51:54Z"],["dc.date.available","2018-11-07T08:51:54Z"],["dc.date.issued","2011"],["dc.description.abstract","The decline of bees has raised concerns regarding their conservation and the maintenance of ecosystem services they provide to bee-pollinated wild flowers and crops. Although the Mediterranean region is a hotspot for bee species richness, their status remains poorly studied. There is an urgent need for cost-effective, reliable, and unbiased sampling methods that give good bee species richness estimates. This study aims: (a) to assess bee species richness in two common Mediterranean habitat types: semi-natural scrub (phrygana) and managed olive groves; (b) to compare species richness in those systems to that of other biogeographic regions, and (c) to assess whether six different sampling methods (pan traps, variable and standardized transect walks, observation plots and trap nests), previously tested in other European biogeographic regions, are suitable in Mediterranean communities. Eight study sites, four per habitat type, were selected on the island of Lesvos, Greece. The species richness observed was high compared to other habitat types worldwide for which comparable data exist. Pan traps collected the highest proportion of the total bee species richness across all methods at the scale of a study site. Variable and standardized transect walks detected the highest total richness over all eight study sites. Trap nests and observation plots detected only a limited fraction of the bee species richness. To assess the total bee species richness in bee diversity hotspots, such as the studied habitats, we suggest a combination of transect walks conducted by trained bee collectors and pan trap sampling."],["dc.identifier.doi","10.1007/s11284-011-0852-1"],["dc.identifier.isi","000297204000013"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/22045"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","0912-3814"],["dc.title","Assessing bee species richness in two Mediterranean communities: importance of habitat type and sampling techniques"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","288"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Oecologia"],["dc.bibliographiccitation.lastpage","296"],["dc.bibliographiccitation.volume","122"],["dc.contributor.author","Steffan-Dewenter, Ingolf"],["dc.contributor.author","Tscharntke, Teja"],["dc.date.accessioned","2017-09-07T11:50:55Z"],["dc.date.available","2017-09-07T11:50:55Z"],["dc.date.issued","2002"],["dc.identifier.doi","10.1007/s004420050034"],["dc.identifier.gro","3149956"],["dc.identifier.pmid","28308384"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6670"],["dc.language.iso","en"],["dc.notes.status","zu prüfen"],["dc.relation.issn","0029-8549"],["dc.title","Resource overlap and possible competition between honey bees and wild bees in central Europe"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","303"],["dc.bibliographiccitation.issue","1608"],["dc.bibliographiccitation.journal","Proceedings of the Royal Society B: Biological Sciences"],["dc.bibliographiccitation.lastpage","313"],["dc.bibliographiccitation.volume","274"],["dc.contributor.author","Klein, Alexandra-Maria"],["dc.contributor.author","Vaissière, Bernard E"],["dc.contributor.author","Cane, J. H"],["dc.contributor.author","Steffan-Dewenter, Ingolf"],["dc.contributor.author","Cunningham, Saul A."],["dc.contributor.author","Kremen, Claire"],["dc.contributor.author","Tscharntke, Teja"],["dc.date.accessioned","2017-09-07T11:50:06Z"],["dc.date.available","2017-09-07T11:50:06Z"],["dc.date.issued","2006"],["dc.description.abstract","The extent of our reliance on animal pollination for world crop production for human food has not previously been evaluated and the previous estimates for countries or continents have seldom used primary data. In this review, we expand the previous estimates using novel primary data from 200 countries and found that fruit, vegetable or seed production from 87 of the leading global food crops is dependent upon animal pollination, while 28 crops do not rely upon animal pollination. However, global production volumes give a contrasting perspective, since 60% of global production comes from crops that do not depend on animal pollination, 35% from crops that depend on pollinators, and 5% are unevaluated. Using all crops traded on the world market and setting aside crops that are solely passively self-pollinated, wind-pollinated or parthenocarpic, we then evaluated the level of dependence on animal-mediated pollination for crops that are directly consumed by humans. We found that pollinators are essential for 13 crops, production is highly pollinator dependent for 30, moderately for 27, slightly for 21, unimportant for 7, and is of unknown significance for the remaining 9. We further evaluated whether local and landscape-wide management for natural pollination services could help to sustain crop diversity and production. Case studies for nine crops on four continents revealed that agricultural intensification jeopardizes wild bee communities and their stabilizing effect on pollination services at the landscape scale."],["dc.identifier.doi","10.1098/rspb.2006.3721"],["dc.identifier.gro","3149835"],["dc.identifier.pmid","17164193"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6537"],["dc.language.iso","en"],["dc.notes.status","public"],["dc.relation.issn","0962-8452"],["dc.title","Importance of pollinators in changing landscapes for world crops"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","491"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Journal of Animal Ecology"],["dc.bibliographiccitation.lastpage","500"],["dc.bibliographiccitation.volume","79"],["dc.contributor.author","Holzschuh, Andrea"],["dc.contributor.author","Steffan-Dewenter, Ingolf"],["dc.contributor.author","Tscharntke, Teja"],["dc.date.accessioned","2017-09-07T11:50:43Z"],["dc.date.available","2017-09-07T11:50:43Z"],["dc.date.issued","2009"],["dc.identifier.doi","10.1111/j.1365-2656.2009.01642.x"],["dc.identifier.gro","3149888"],["dc.identifier.pmid","20015213"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6596"],["dc.language.iso","en"],["dc.notes.status","zu prüfen"],["dc.relation.issn","0021-8790"],["dc.title","How do landscape composition and configuration, organic farming and fallow strips affect the diversity of bees, wasps and their parasitoids?"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","201"],["dc.bibliographiccitation.issue","2-4"],["dc.bibliographiccitation.journal","Agriculture, Ecosystems & Environment"],["dc.bibliographiccitation.lastpage","205"],["dc.bibliographiccitation.volume","120"],["dc.contributor.author","Bos, Merijn M."],["dc.contributor.author","Steffan-Dewenter, Ingolf"],["dc.contributor.author","Tscharntke, Teja"],["dc.date.accessioned","2017-09-07T11:53:52Z"],["dc.date.available","2017-09-07T11:53:52Z"],["dc.date.issued","2007"],["dc.description.abstract","The mortality of cacao fruits caused by early fruit abortion or insect and pathogen attacks was investigated in differently managedagroforestry systems in Central Sulawesi, Indonesia. Nine agroforestry systems shaded by three different types of tree stands were selected,which represented a decrease in structural heterogeneity: forest remnants, diverse planted trees and one or two species of planted leguminosetrees. After standardized manual cross-pollination, the development of 600 fruits on 54 trees (6 trees per agroforest) was followed during 18weeks of fruit development. In total, 432 of all fruits were lost before maturity, which seriously undermined yields. The proportion ofharvested fruits per tree (overall average: 27 4%) was not affected by canopy type. Although shade cover did not have a significant effect,losses due to fruit abortion were most likely under forest shade, where nitrogen-fixing leguminose shade trees were absent. Fruit losses due topathogenic infections and insect attacks increased with the homogenization of the agroforests, supporting the hypothesis that agriculturalhomogenization increases risks of pest outbreaks. In conclusion, shade management may be improved to increase yields from cacao usinghighly diversified natural shade agroforestry systems."],["dc.identifier.doi","10.1016/j.agee.2006.09.004"],["dc.identifier.gro","3150005"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6725"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.relation.issn","0167-8809"],["dc.subject","Flower–fruit ratio; Helopeltis; Herbivory; Indonesia; Pollination; Phytophthora; Cacao yield"],["dc.title","Shade tree management affects fruit abortion, insect pests and pathogens of cacao"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","4973"],["dc.bibliographiccitation.issue","12"],["dc.bibliographiccitation.journal","Proceedings of the National Academy of Sciences"],["dc.bibliographiccitation.lastpage","4978"],["dc.bibliographiccitation.volume","104"],["dc.contributor.author","Steffan-Dewenter, Ingolf"],["dc.contributor.author","Kessler, Michael"],["dc.contributor.author","Barkmann, Jan"],["dc.contributor.author","Bos, Merijn M."],["dc.contributor.author","Buchori, Damayanti"],["dc.contributor.author","Erasmi, Stefan"],["dc.contributor.author","Faust, Heiko"],["dc.contributor.author","Gerold, Gerhard"],["dc.contributor.author","Glenk, Klaus"],["dc.contributor.author","Gradstein, S. Robbert"],["dc.contributor.author","Guhardja, Edi"],["dc.contributor.author","Harteveld, Marieke"],["dc.contributor.author","Hertel, Dietrich"],["dc.contributor.author","Höhn, Patrick"],["dc.contributor.author","Kappas, Martin"],["dc.contributor.author","Köhler, Stefan"],["dc.contributor.author","Leuschner, Christoph"],["dc.contributor.author","Maertens, Miet"],["dc.contributor.author","Marggraf, Rainer"],["dc.contributor.author","Migge-Kleian, Sonja"],["dc.contributor.author","Mogea, Johanis"],["dc.contributor.author","Pitopang, Ramadhanil"],["dc.contributor.author","Schaefer, Matthias"],["dc.contributor.author","Schwarze, Stefan"],["dc.contributor.author","Sporn, Simone G."],["dc.contributor.author","Steingrebe, Andrea"],["dc.contributor.author","Tjitrosoedirdjo, Sri Sudarmiyati"],["dc.contributor.author","Tjitrosoemito, Soekisman"],["dc.contributor.author","Twele, André"],["dc.contributor.author","Weber, Robert"],["dc.contributor.author","Woltmann, Lars"],["dc.contributor.author","Zeller, Manfred"],["dc.contributor.author","Tscharntke, Teja"],["dc.date.accessioned","2017-09-07T11:44:51Z"],["dc.date.accessioned","2020-05-11T13:28:11Z"],["dc.date.available","2017-09-07T11:44:51Z"],["dc.date.available","2020-05-11T13:28:11Z"],["dc.date.issued","2007"],["dc.description.abstract","Losses of biodiversity and ecosystem functioning due to rainforest destruction and agricultural intensification are prime concerns for science and society alike. Potentially, ecosystems show nonlinear responses to land-use intensification that would open management options with limited ecological losses but satisfying economic gains. However, multidisciplinary studies to quantify ecological losses and socioeconomic tradeoffs under different management options are rare. Here, we evaluate opposing land use strategies in cacao agroforestry in Sulawesi, Indonesia, by using data on species richness of nine plant and animal taxa, six related ecosystem functions, and on socioeconomic drivers of agroforestry expansion. Expansion of cacao cultivation by 230% in the last two decades was triggered not only by economic market mechanisms, but also by rarely considered cultural factors. Transformation from near-primary forest to agroforestry had little effect on overall species richness, but reduced plant biomass and carbon storage by ≈75% and species richness of forest-using species by ≈60%. In contrast, increased land use intensity in cacao agroforestry, coupled with a reduction in shade tree cover from 80% to 40%, caused only minor quantitative changes in biodiversity and maintained high levels of ecosystem functioning while doubling farmers' net income. However, unshaded systems further increased income by ≈40%, implying that current economic incentives and cultural preferences for new intensification practices put shaded systems at risk. We conclude that low-shade agroforestry provides the best available compromise between economic forces and ecological needs. Certification schemes for shade-grown crops may provide a market-based mechanism to slow down current intensification trends."],["dc.identifier.doi","10.1073/pnas.0608409104"],["dc.identifier.gro","3148984"],["dc.identifier.scopus","2-s2.0-34247633507"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/5623"],["dc.identifier.url","http://www.scopus.com/inward/record.url?eid=2-s2.0-34247633507&partnerID=MN8TOARS"],["dc.language.iso","en"],["dc.notes.intern","Faust Crossref Import"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.eissn","1091-6490"],["dc.relation.issn","0027-8424"],["dc.title","Tradeoffs between income, biodiversity, and ecosystem functioning during tropical rainforest conversion and agroforestry intensification"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","4946"],["dc.bibliographiccitation.issue","11"],["dc.bibliographiccitation.journal","Global Change Biology"],["dc.bibliographiccitation.lastpage","4957"],["dc.bibliographiccitation.volume","23"],["dc.contributor.author","Lichtenberg, Elinor M."],["dc.contributor.author","Kennedy, Christina M."],["dc.contributor.author","Kremen, Claire"],["dc.contributor.author","Batáry, Péter"],["dc.contributor.author","Berendse, Frank"],["dc.contributor.author","Bommarco, Riccardo"],["dc.contributor.author","Bosque-Pérez, Nilsa A."],["dc.contributor.author","Carvalheiro, Luísa G."],["dc.contributor.author","Snyder, William E."],["dc.contributor.author","Williams, Neal M."],["dc.contributor.author","Winfree, Rachael"],["dc.contributor.author","Klatt, Björn K."],["dc.contributor.author","Åström, Sandra"],["dc.contributor.author","Benjamin, Faye"],["dc.contributor.author","Brittain, Claire"],["dc.contributor.author","Chaplin-Kramer, Rebecca"],["dc.contributor.author","Clough, Yann"],["dc.contributor.author","Danforth, Bryan"],["dc.contributor.author","Diekötter, Tim"],["dc.contributor.author","Eigenbrode, Sanford D."],["dc.contributor.author","Ekroos, Johan"],["dc.contributor.author","Elle, Elizabeth"],["dc.contributor.author","Freitas, Breno M."],["dc.contributor.author","Fukuda, Yuki"],["dc.contributor.author","Gaines-Day, Hannah R."],["dc.contributor.author","Grab, Heather"],["dc.contributor.author","Gratton, Claudio"],["dc.contributor.author","Holzschuh, Andrea"],["dc.contributor.author","Isaacs, Rufus"],["dc.contributor.author","Isaia, Marco"],["dc.contributor.author","Jha, Shalene"],["dc.contributor.author","Jonason, Dennis"],["dc.contributor.author","Jones, Vincent P."],["dc.contributor.author","Klein, Alexandra-Maria"],["dc.contributor.author","Krauss, Jochen"],["dc.contributor.author","Letourneau, Deborah K."],["dc.contributor.author","Macfadyen, Sarina"],["dc.contributor.author","Mallinger, Rachel E."],["dc.contributor.author","Martin, Emily A."],["dc.contributor.author","Martínez, Eliana"],["dc.contributor.author","Memmott, Jane"],["dc.contributor.author","Morandin, Lora"],["dc.contributor.author","Neame, Lisa"],["dc.contributor.author","Otieno, Mark"],["dc.contributor.author","Park, Mia G."],["dc.contributor.author","Pfiffner, Lukas"],["dc.contributor.author","Pocock, Michael J. O."],["dc.contributor.author","Ponce, Carlos"],["dc.contributor.author","Potts, Simon G."],["dc.contributor.author","Poveda, Katja"],["dc.contributor.author","Ramos, Mariangie"],["dc.contributor.author","Rosenheim, Jay A."],["dc.contributor.author","Rundlöf, Maj"],["dc.contributor.author","Sardiñas, Hillary"],["dc.contributor.author","Saunders, Manu E."],["dc.contributor.author","Schon, Nicole L."],["dc.contributor.author","Sciligo, Amber R."],["dc.contributor.author","Sidhu, C. Sheena"],["dc.contributor.author","Steffan-Dewenter, Ingolf"],["dc.contributor.author","Tscharntke, Teja"],["dc.contributor.author","Veselý, Milan"],["dc.contributor.author","Weisser, Wolfgang W."],["dc.contributor.author","Wilson, Julianna K."],["dc.contributor.author","Crowder, David W."],["dc.date.accessioned","2017-09-07T11:54:44Z"],["dc.date.available","2017-09-07T11:54:44Z"],["dc.date.issued","2017"],["dc.identifier.doi","10.1111/gcb.13714"],["dc.identifier.gro","3150092"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6822"],["dc.notes.status","public"],["dc.notes.submitter","chake"],["dc.relation.issn","1354-1013"],["dc.title","A global synthesis of the effects of diversified farming systems on arthropod diversity within fields and across agricultural landscapes"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","465"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Ecography"],["dc.bibliographiccitation.lastpage","474"],["dc.bibliographiccitation.volume","28"],["dc.contributor.author","Krauss, Jochen"],["dc.contributor.author","Steffan-Dewenter, Ingolf"],["dc.contributor.author","Müller, Christine B."],["dc.contributor.author","Tscharntke, Teja"],["dc.date.accessioned","2017-09-07T11:53:50Z"],["dc.date.available","2017-09-07T11:53:50Z"],["dc.date.issued","2005"],["dc.description.abstract","Fragmentation of food resources is a major cause of species extinction. We tested the effects of habitat area, isolation and quality for the occurrence and population density of the endangered butterfly Polyommatus coridon. Polyommatus coridon larvae are monophagous on the plant Hippocrepis comosa, and both species are specialised on calcareous grassland, which is an endangered and highly fragmented habitat type in Germany.In 2001 we surveyed all known calcareous grasslands (n=298) around the city of Göttingen (Germany) to map the population size of H. comosa in these habitats. Further, habitat isolation (between-patch distance: 70–7220 m) and habitat quality (cover of flowering plants, height of herb layer, percent bare ground, cover of shrub layer, wind protection, inclination) were quantified. Hippocrepis comosa occurred on only 124 fragments, which were then surveyed by 20 min transect counts for adult P. coridon in 2001 and 2002.Occurrence and population density of P. coridon were largely determined by the population size of its larval food plant, which was correlated with grassland area. Effects of habitat isolation and habitat quality on P. coridon populations contributed only little to the explanation.In conclusion, this monophagous habitat specialist depended on large habitats with large food plant populations to exist in viable populations. Habitat isolation and quality appear to contribute to occurrence and density patterns only in landscapes where these factors shift towards extremes, therefore general recommendations for conservation programs are difficult as they depend on regional distinctions."],["dc.identifier.doi","10.1111/j.0906-7590.2005.04201.x"],["dc.identifier.gro","3149996"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6715"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.relation.issn","0906-7590"],["dc.title","Relative importance of resource quantity, isolation and habitat quality for landscape distribution of a monophagous butterfly"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]