Veddeler, Dorthe

[["dc.bibliographiccitation.firstpage","755"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Oecologia"],["dc.bibliographiccitation.lastpage","762"],["dc.bibliographiccitation.volume","162"],["dc.contributor.author","Veddeler, Dorthe"],["dc.contributor.author","Tylianakis, Jason M."],["dc.contributor.author","Tscharntke, Teja"],["dc.contributor.author","Klein, Alexandra-Maria"],["dc.date.accessioned","2017-09-07T11:50:53Z"],["dc.date.available","2017-09-07T11:50:53Z"],["dc.date.issued","2010"],["dc.description.abstract","Biodiversity may enhance and stabilise ecosystem functioning, but little evidence exists for diversity-function relationships involving multitrophic interactions in real landscapes. In multitrophic communities diversity may vary at different trophic levels, with either synergistic or antagonistic effects on ecosystem functioning. Intensification of land-use systems is often found to reduce diversity, which in turn may lead to reduced associated ecological functions in natural food webs, such as host-parasite interactions. In this study we investigated the relationship between the number of natural enemy and host species and the mean rate and temporal variability of parasitism (inverse of stability), along an intensification gradient of coffee agroforests in Ecuador. We used standardised trap nests for bees and wasps and their natural enemies in 14 agroforests, and evaluated these monthly over a period of 17 months. We found that parasitism rates of wasps and bees increased with increasing number of enemy species and decreased with increasing number of host species. Temporal variability in parasitism rates decreased with increasing number of enemy species and increased with temporal variability in enemy species richness; however, these effects were restricted to wasp hosts. Intensification of agroforests did not significantly affect species richness of hosts or enemies or their relation to parasitism and its temporal variability. We conclude that high enemy diversity may enhance parasitism rates and that high host diversity may provide resistance against consumption. Furthermore, we show that a diverse and stable enemy community may also have a stabilizing effect on parasitism rates. However, these effects may be host-guild specific, as these relations were restricted to wasps."],["dc.identifier.doi","10.1007/s00442-009-1491-x"],["dc.identifier.gro","3149935"],["dc.identifier.pmid","19924447"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?goescholar/4153"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6647"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","final"],["dc.relation.issn","0029-8549"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.subject","Land use; Biodiversity; Management; Pollinator; Predator"],["dc.title","Natural enemy diversity reduces temporal variability in wasp but not bee parasitism"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","no"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","594"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Oikos"],["dc.bibliographiccitation.lastpage","601"],["dc.bibliographiccitation.volume","112"],["dc.contributor.author","Veddeler, Dorthe"],["dc.contributor.author","Klein, Alexandra-Maria"],["dc.contributor.author","Tscharntke, Teja"],["dc.date.accessioned","2017-09-07T11:50:09Z"],["dc.date.available","2017-09-07T11:50:09Z"],["dc.date.issued","2006"],["dc.identifier.doi","10.1111/j.0030-1299.2006.14111.x"],["dc.identifier.gro","3149851"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6555"],["dc.language.iso","en"],["dc.notes.status","zu prüfen"],["dc.relation.issn","0030-1299"],["dc.title","Contrasting responses of bee communities to coffee flowering at different spatial scales"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","109"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Agroforestry Systems"],["dc.bibliographiccitation.lastpage","114"],["dc.bibliographiccitation.volume","73"],["dc.contributor.author","Veddeler, Dorthe"],["dc.contributor.author","Olschewski, Roland"],["dc.contributor.author","Tscharntke, Teja"],["dc.contributor.author","Klein, Alexandra-Maria"],["dc.date.accessioned","2017-09-07T11:50:09Z"],["dc.date.available","2017-09-07T11:50:09Z"],["dc.date.issued","2008"],["dc.description.abstract","Fruit set and quality of highland coffee (Coffea arabica) have been experimentally shown to be higher with bee-mediated or manual pollen supplementation than with autonomous self-pollination. Based on extrapolation from these small-scale experiments, very substantial monetary values for the pollination service have recently been suggested. However, previous research has not included direct measurement of coffee yield at a farm level in relation to pollinator activity, testing if pollinators are not only limiting fruit set and quality, but also coffee yield and farm profit. The extrapolations from small-scale experiments may be subject to error, because resource reallocation during fruit development, associated with enhanced pollination, was neglected, and many studies were restricted to a single coffee farm, limiting the validity of extrapolation. Here, we investigate the relationship between coffee yield and the community of coffee flower-visiting bees on 21 farms in Ecuador, where coffee is grown under tree shade. Our data show, for the first time on a farm-scale, that coffee yield was positively related to the density of non-managed, social flower-visiting bees per coffee shrub, but not to the number of inflorescences per shrub. Our data revealed that a fourfold increase in bee density was associated with an 80% increase in yield and an 800% increase in net revenues. Consequently, in our study higher yield associated with increased pollination generated higher revenues per hectare, so that farm profit was higher when bees were abundant."],["dc.identifier.doi","10.1007/s10457-008-9120-y"],["dc.identifier.gro","3149852"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/6786"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6556"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","final"],["dc.relation.issn","0167-4366"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.subject","Coffea arabica; Ecosystem service; Farm-wide yield; Honey bee; Pollination; Stingless bees"],["dc.title","The contribution of non-managed social bees to coffee production: new economic insights based on farm-scale yield data"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","no"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1841"],["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","Ecological Applications"],["dc.bibliographiccitation.lastpage","1849"],["dc.bibliographiccitation.volume","17"],["dc.contributor.author","Bos, Merijn M."],["dc.contributor.author","Veddeler, Dorthe"],["dc.contributor.author","Bogdanski, Anne K."],["dc.contributor.author","Klein, Alexandra-Maria"],["dc.contributor.author","Tscharntke, Teja"],["dc.contributor.author","Steffan-Dewenter, Ingolf"],["dc.contributor.author","Tylianakis, Jason M."],["dc.date.accessioned","2017-09-07T11:53:56Z"],["dc.date.available","2017-09-07T11:53:56Z"],["dc.date.issued","2008"],["dc.identifier.doi","10.1890/06-1763.1"],["dc.identifier.gro","3150022"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6744"],["dc.language.iso","en"],["dc.notes.status","zu prüfen"],["dc.relation.issn","1051-0761"],["dc.title","CAVEATS TO QUANTIFYING ECOSYSTEM SERVICES: FRUIT ABORTION BLURS BENEFITS FROM CROP POLLINATION"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]