Olschewski, Roland

[["dc.bibliographiccitation.firstpage","314"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Ecological Complexity"],["dc.bibliographiccitation.lastpage","319"],["dc.bibliographiccitation.volume","7"],["dc.contributor.author","Olschewski, Roland"],["dc.contributor.author","Klein, Alexandra-Maria"],["dc.contributor.author","Tscharntke, Teja"],["dc.date.accessioned","2017-09-07T11:53:46Z"],["dc.date.available","2017-09-07T11:53:46Z"],["dc.date.issued","2010"],["dc.identifier.doi","10.1016/j.ecocom.2010.01.002"],["dc.identifier.gro","3149964"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6680"],["dc.language.iso","en"],["dc.notes.status","zu prüfen"],["dc.relation.issn","1476-945X"],["dc.title","Economic trade-offs between carbon sequestration, timber production, and crop pollination in tropical forested landscapes"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","7"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Ecology and Society"],["dc.bibliographiccitation.volume","11"],["dc.contributor.author","Olschewski, Roland"],["dc.contributor.author","Tscharntke, Teja"],["dc.contributor.author","Benitez, Pablo C."],["dc.contributor.author","Schwarze, Stefan"],["dc.contributor.author","Klein, Alexandra-Maria"],["dc.date.accessioned","2018-11-07T09:44:34Z"],["dc.date.available","2018-11-07T09:44:34Z"],["dc.date.issued","2006"],["dc.description.abstract","Biodiversity conservation through land-use systems on private land is becoming a pressing environmental policy issue. Agroforestry, such as shade-coffee production, contributes to biodiversity conservation. However, falling coffee prices force many coffee growers to convert their sites into economically more attractive land uses. We performed an economic evaluation of coffee pollination by bees in two distinct tropical regions: an area of low human impact with forests neighboring agroforestry in Indonesia and an area of high human impact with little remaining forest in Ecuador. We evaluated bee pollination for different forest-destruction scenarios, where coffee yields depend on forests to provide nesting sites for bees. We used two novel approaches. First, we examined how coffee net revenues depend on the pollination services of adjacent forests by considering berry weight in addition to fruit set, thereby providing a comprehensive evaluation. Second, we determined the net welfare effects of land-use changes, including the fact that former forestland is normally used for alternative crops. In both regions, crop revenues exceeded coffee pollination values, generating incentives to convert forests, even if owners would be compensated for pollination services. The promotion of certified \"biodiversity-friendly\" coffee is a feasible option to maintain shade-coffee systems. This is of special importance in high-impact areas where only small forest fragments remain. We conclude that a comprehensive economic analysis is necessary to adequately evaluate rainforest preservation for the enhancement of ecosystem services, such as pollination."],["dc.identifier.doi","10.5751/es-01629-110107"],["dc.identifier.gro","3149832"],["dc.identifier.isi","000239121300006"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/34424"],["dc.language.iso","en"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Resilience Alliance"],["dc.relation.issn","1708-3087"],["dc.title","Economic evaluation of pollination services comparing coffee landscapes in Ecuador and Indonesia"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["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"]]