Holtkamp, Anna Mareike

[["dc.bibliographiccitation.seriesnr","1"],["dc.contributor.author","Faust, H."],["dc.contributor.author","Schwarze, S."],["dc.contributor.author","Beckert, B."],["dc.contributor.author","Bruemmer, B."],["dc.contributor.author","Dittrich, C."],["dc.contributor.author","Euler, M."],["dc.contributor.author","Gatto, M."],["dc.contributor.author","Hauser-Schäublin, B."],["dc.contributor.author","Hein, J."],["dc.contributor.author","Holtkamp, A. M."],["dc.contributor.author","Ibanez, M."],["dc.contributor.author","Klasen, S."],["dc.contributor.author","Kopp, T."],["dc.contributor.author","Krishna, V."],["dc.contributor.author","Kunz, Y."],["dc.contributor.author","Lay, J."],["dc.contributor.author","Mußhoff, O."],["dc.contributor.author","Qaim, M."],["dc.contributor.author","Steinebach, S."],["dc.contributor.author","Vorlaufer, M."],["dc.contributor.author","Wollni, M."],["dc.date.accessioned","2017-09-07T11:50:59Z"],["dc.date.available","2017-09-07T11:50:59Z"],["dc.date.issued","2013-09"],["dc.description.abstract","EFForTS is a collaborative research center (CRC) which focuses on Ecological and socio-economic Functions of Tropical Lowland Rainforest Transformation Systems in Sumatra, Indonesia. The paper presents the common sampling frame of the socio economic sub-projects. The investigations and data collections intertwine and complement one another. Thus the methodological approach reflects the idea of an interdisciplinary and integrative research approach. Lead by hypotheses we structured our sampling procedure hierarchically. Starting at the household level in the core villages of the research regions we investigate additional local villages. Further we extend the data collections on the regional level with household, village and trader surveys. The national and international levels we reach by stakeholder interviews with governmental and non-governmental experts. The applied methods are composed of qualitative and quantitative empirical studies."],["dc.format.extent","32"],["dc.identifier.gro","3147868"],["dc.identifier.ppn","766862577"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/5197"],["dc.language.iso","en"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","chake"],["dc.publisher","SFB 990, University of Göttingen; GOEDOC, Dokumenten- und Publikationsserver der Georg-August-Universität Göttingen"],["dc.publisher.place","Göttingen"],["dc.relation","SFB 990: Ökologische und sozioökonomische Funktionen tropischer Tieflandregenwald-Transformationssysteme (Sumatra, Indonesien)"],["dc.relation","SFB 990 | C | C01: Produktivität, Marktzugang und internationale Anbindung von kleinbäuerlicher Kautschuk- und Palmölerzeugung in der Provinz Jambi"],["dc.relation","SFB 990 | C | C02: Soziale Transformationsprozesse und nachhaltige Ressourcennutzung im ländlichen Jambi"],["dc.relation","SFB 990 | C | C03: Culture-Specific Human Interaction with Tropical Lowland Rainforests in Transformation in Jambi, Sumatra"],["dc.relation","SFB 990 | C | C04: Mitigating trade-offs between economic and ecological functions and services through certification"],["dc.relation","SFB 990 | C | C06: Zum Verständnis des Zertifizierungs- und Wiederanpflanzungsverhaltens indonesischer Kleinbauern"],["dc.relation","SFB 990 | C | C07: Einflussfaktoren von Landnutzungswandel und sozioökonomische Auswirkungen für ländliche Haushalte"],["dc.relation","SFB 990 | C | C08: Design effektiver Politikinstrumente zur Förderung nachhaltiger Landnutzung"],["dc.relation.crisseries","EFForTS Discussion Paper Series"],["dc.relation.ispartofseries","EFForTS Discussion Paper Series;1"],["dc.relation.orgunit","Johann-Friedrich-Blumenbach-Institut für Zoologie und Anthropologie"],["dc.rights","CC BY-ND 3.0"],["dc.subject","socioeconomic functions rainforest transformation systems sampling framework methods Jambi Indonesia"],["dc.subject.gro","sfb990_discussionpaperseries"],["dc.title","Assessment of Socio-Economic Functions of Tropical Lowland Transformation Systems in Indonesia - Sampling Framework and Methodological Approach"],["dc.type","working_paper"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","no"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","110"],["dc.bibliographiccitation.journal","Agriculture, Ecosystems & Environment"],["dc.bibliographiccitation.lastpage","118"],["dc.bibliographiccitation.volume","232"],["dc.contributor.author","Guillaume, Thomas"],["dc.contributor.author","Holtkamp, Anna Mareike"],["dc.contributor.author","Damris, Muhammad"],["dc.contributor.author","Brümmer, Bernhard"],["dc.contributor.author","Kuzyakov, Yakov"],["dc.date.accessioned","2017-11-28T10:02:28Z"],["dc.date.available","2017-11-28T10:02:28Z"],["dc.date.issued","2016"],["dc.description.abstract","Tropical regions, such as Sumatra, experiencing extensive transformation of natural ecosystems, are close to complete exhaustion of available land. Agroecosystems strongly modify water and nutrient cycles, leading to losses of soil fertility, C sequestration and biodiversity. Although large companies are the main drivers of deforestation and plantation establishment, smallholders account for 40% of the oil palm and the majority of the rubber production in Indonesia. Here, we assess the extent and mechanisms of soil degradation under smallholder oil palm and rubber plantations in a context of land scarcity. The topsoil properties (C and N contents, C stocks, C/N ratio, bulk density) in 207 oil palm and rubber plantations in the Jambi province of Sumatra were determined beside trees, inside rows and interrows. Soils under oil palms were on average more degraded than under rubber, showing lower C content and stocks, lower N and higher bulk density. While soil properties were homogenous under rubber, two opposite trends were observed under oil palm plantations: the majority of soils had C content <2.2%, but about one fifth of the plantations had >9% C. This resulted from the establishment of oil palms under conditions of land scarcity. Because the oil palm boom started when rubber was already well-established, oil palms were frequently planted in marginal areas, such as peatlands or riparian areas (high C) or soils degraded by previous use (low C). The management of oil palms led to subsequent soil degradation, especially in interrows: C content decreased and bulk density increased in older oil palm plantations. This was not observed in rubber plantations because of a C input from leaf litter spread homogeneously all over the plantation, higher ground cover and a limited use of motorized vehicles. Considering that 10% of soils under oil palms had very low C content (<1%), we conclude that intensive cultivation can lead to intensive soil degradation and expect future degradation of soils under young oil palms. This challenges the sustainability of agricultural intensification in Sumatra. Because Sumatra is a pioneer of tropical land-use change, this should be regarded as potential threats that other tropical regions may face in future."],["dc.identifier.doi","10.1016/j.agee.2016.07.002"],["dc.identifier.fs","622613"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/10574"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.relation","SFB 990: Ökologische und sozioökonomische Funktionen tropischer Tieflandregenwald-Transformationssysteme (Sumatra, Indonesien)"],["dc.relation","SFB 990 | A | A04: Carbon stock, turnover and functions in heavily weathered soils under lowland rainforest transformation systems"],["dc.relation","SFB 990 | C | C01: Produktivität, Marktzugang und internationale Anbindung von kleinbäuerlicher Kautschuk- und Palmölerzeugung in der Provinz Jambi"],["dc.relation.issn","0167-8809"],["dc.subject.gro","sfb990_journalarticles"],["dc.title","Soil degradation in oil palm and rubber plantations under land resource scarcity"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","unknown"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","13137"],["dc.bibliographiccitation.firstpage","1"],["dc.bibliographiccitation.journal","Nature Communications"],["dc.bibliographiccitation.lastpage","12"],["dc.bibliographiccitation.volume","7"],["dc.contributor.author","Clough, Yann"],["dc.contributor.author","Krishna, Vijesh V."],["dc.contributor.author","Corre, Marife D."],["dc.contributor.author","Darras, Kevin"],["dc.contributor.author","Denmead, Lisa H."],["dc.contributor.author","Meijide, Ana"],["dc.contributor.author","Moser, Stefan"],["dc.contributor.author","Mußhoff, Oliver"],["dc.contributor.author","Steinebach, Stefanie"],["dc.contributor.author","Veldkamp, Edzo"],["dc.contributor.author","Allen, Kara"],["dc.contributor.author","Barnes, Andrew D."],["dc.contributor.author","Breidenbach, Natalie"],["dc.contributor.author","Brose, Ulrich"],["dc.contributor.author","Buchori, Damayanti"],["dc.contributor.author","Daniel, Rolf"],["dc.contributor.author","Finkeldey, Reiner"],["dc.contributor.author","Harahap, Idham"],["dc.contributor.author","Hertel, Dietrich"],["dc.contributor.author","Holtkamp, A. Mareike"],["dc.contributor.author","Hörandl, Elvira"],["dc.contributor.author","Irawan, Bambang"],["dc.contributor.author","Jaya, I. Nengah Surati"],["dc.contributor.author","Jochum, Malte"],["dc.contributor.author","Klarner, Bernhard"],["dc.contributor.author","Knohl, Alexander"],["dc.contributor.author","Kotowska, Martyna M."],["dc.contributor.author","Krashevska, Valentyna"],["dc.contributor.author","Kreft, Holger"],["dc.contributor.author","Kurniawan, Syahrul"],["dc.contributor.author","Leuschner, Christoph"],["dc.contributor.author","Maraun, Mark"],["dc.contributor.author","Melati, Dian Nuraini"],["dc.contributor.author","Opfermann, Nicole"],["dc.contributor.author","Pérez-Cruzado, César"],["dc.contributor.author","Prabowo, Walesa Edho"],["dc.contributor.author","Rembold, Katja"],["dc.contributor.author","Rizali, Akhmad"],["dc.contributor.author","Rubiana, Ratna"],["dc.contributor.author","Schneider, Dominik"],["dc.contributor.author","Tjitrosoedirdjo, Sri Sudarmiyati"],["dc.contributor.author","Tjoa, Aiyen"],["dc.contributor.author","Tscharntke, Teja"],["dc.contributor.author","Scheu, Stefan"],["dc.date.accessioned","2017-09-07T11:45:50Z"],["dc.date.available","2017-09-07T11:45:50Z"],["dc.date.issued","2016"],["dc.description.abstract","Smallholder-dominated agricultural mosaic landscapes are highlighted as model production systems that deliver both economic and ecological goods in tropical agricultural landscapes, but trade-offs underlying current land-use dynamics are poorly known. Here, using the most comprehensive quantification of land-use change and associated bundles of ecosystem functions, services and economic benefits to date, we show that Indonesian smallholders predominantly choose farm portfolios with high economic productivity but low ecological value. The more profitable oil palm and rubber monocultures replace forests and agroforests critical for maintaining above- and below-ground ecological functions and the diversity of most taxa. Between the monocultures, the higher economic performance of oil palm over rubber comes with the reliance on fertilizer inputs and with increased nutrient leaching losses. Strategies to achieve an ecological-economic balance and a sustainable management of tropical smallholder landscapes must be prioritized to avoid further environmental degradation."],["dc.description.sponsorship","Open-Access-Publikationsfonds 2016"],["dc.identifier.doi","10.1038/ncomms13137"],["dc.identifier.fs","625489"],["dc.identifier.gro","3149120"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/13958"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/5770"],["dc.language.iso","en"],["dc.notes.intern","Kreft Crossref Import"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation","SFB 990: Ökologische und sozioökonomische Funktionen tropischer Tieflandregenwald-Transformationssysteme (Sumatra, Indonesien)"],["dc.relation","SFB 990 | A | A03: Untersuchung von Land-Atmosphäre Austauschprozesse in Landnutzungsänderungs-Systemen"],["dc.relation","SFB 990 | A | A05: Optimierung des Nährstoffmanagements in Ölpalmplantagen und Hochrechnung plot-basierter Treibhausgasflüsse auf die Landschaftsebene transformierter Regenwälder"],["dc.relation","SFB 990 | B | B01: Structure, stability and functioning of macro-invertebrate communities in rainforest transformation systems in Sumatra (Indonesia)"],["dc.relation","SFB 990 | B | B02: Impact of rainforest transformation on phylogenetic and functional diversity of soil prokaryotic communities in Sumatra (Indonesia)"],["dc.relation","SFB 990 | B | B03: Plant genetic diversity in tropical lowland rainforest transformation systems"],["dc.relation","SFB 990 | B | B04: Pflanzenproduktivität und Ressourcenaufteilung im Wurzelraum entlang von Gradienten tropischer Landnutzungsintensität und Baumartenvielfalt"],["dc.relation","SFB 990 | B | B05: Land use patterns in Jambi - quantification of structure, heterogeneity and changes of vegetation and land use as a basis for the explanation of ecological and socioeconomic functions"],["dc.relation","SFB 990 | B | B06: Taxonomische, funktionelle, phylogenetische und biogeographische Diversität vaskulärer Pflanzen in Regenwald-Transformationssystemen auf Sumatra (Indonesien)"],["dc.relation","SFB 990 | B | B08: Struktur und Funktion des Zersetzersystems in Transformationssystemen von Tiefland-Regenwäldern"],["dc.relation","SFB 990 | B | B09: Oberirdische Biodiversitätsmuster und Prozesse in Regenwaldtransformations-Landschaften"],["dc.relation","SFB 990 | B | B12: Reproductive strategies of weedy flowering plants in tropical rainforest transformation systems"],["dc.relation","SFB 990 | B | B13: Impact of management intensity and tree enrichment of oil palm plantations on below- and aboveground invertebrates in Sumatra (Indonesia)"],["dc.relation","SFB 990 | C | C01: Produktivität, Marktzugang und internationale Anbindung von kleinbäuerlicher Kautschuk- und Palmölerzeugung in der Provinz Jambi"],["dc.relation","SFB 990 | C | C03: Culture-Specific Human Interaction with Tropical Lowland Rainforests in Transformation in Jambi, Sumatra"],["dc.relation","SFB 990 | C | C06: Zum Verständnis des Zertifizierungs- und Wiederanpflanzungsverhaltens indonesischer Kleinbauern"],["dc.relation","SFB 990 | C | C07: Einflussfaktoren von Landnutzungswandel und sozioökonomische Auswirkungen für ländliche Haushalte"],["dc.relation.issn","2041-1723"],["dc.relation.orgunit","Abteilung Bioklimatologie"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0/"],["dc.subject.gro","sfb990_journalarticles"],["dc.title","Land-use choices follow profitability at the expense of ecological functions in Indonesian smallholder landscapes"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.seriesnr","11"],["dc.contributor.author","Schwarze, S."],["dc.contributor.author","Euler, M."],["dc.contributor.author","Gatto, M."],["dc.contributor.author","Hein, J."],["dc.contributor.author","Hettig, E."],["dc.contributor.author","Holtkamp, A. M."],["dc.contributor.author","Izhar, L."],["dc.contributor.author","Kunz, Y."],["dc.contributor.author","Lay, J."],["dc.contributor.author","Merten, J."],["dc.contributor.author","Moser, S."],["dc.contributor.author","Mußhoff, O."],["dc.contributor.author","Otten, F."],["dc.contributor.author","Qaim, M."],["dc.contributor.author","Soetarto, E."],["dc.contributor.author","Steinebach, S."],["dc.contributor.author","Trapp, K."],["dc.contributor.author","Vorlaufer, M."],["dc.contributor.author","Faust, H."],["dc.date.accessioned","2017-09-07T11:50:57Z"],["dc.date.available","2017-09-07T11:50:57Z"],["dc.date.issued","2015-04"],["dc.description.abstract","The rapid expansion of the oil palm area in many tropical countries has raised concerns about its negative impact on local communities, food security, and on the environment. While the expansion of oil palm in early stages was mainly driven by large private and public companies, it is expected that smallholders will outnumber large estates in the near future. For policy formulation it is hence important to better understand who these smallholders are and why they have started to cultivate oil palm. In this paper, we used a rich dataset collected in the province of Jambi, which is one of the most important production areas for oil palm, to analyse smallholders’ decision making by combining qualitative, quantitative, and experimental methods. We identified agricultural expertise, lacking flexibility in labour requirements, availability of seedlings, and investment costs as the major constraints for farmers to cultivate oil palm. Important reasons for oil palm cultivation are the higher returns to labour and the shorter immature phase of oil palm. We also showed that oil palm farmers are neither risk-averse nor risk-loving, rather, they appear to be risk-neutral."],["dc.format.extent","IV, 29"],["dc.identifier.gro","3147870"],["dc.identifier.ppn","824603850"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/5200"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.publisher","SFB 990, University of Göttingen; GOEDOC, Dokumenten- und Publikationsserver der Georg-August-Universität Göttingen"],["dc.publisher.place","Göttingen"],["dc.relation","SFB 990: Ökologische und sozioökonomische Funktionen tropischer Tieflandregenwald-Transformationssysteme (Sumatra, Indonesien)"],["dc.relation","SFB 990 | B | B10: Landschaftsbezogene Bewertung der ökologischen und sozioökonomischen Funktionen von Regenwald- Transformationssystemen in Sumatra (Indonesien)"],["dc.relation","SFB 990 | C | C01: Produktivität, Marktzugang und internationale Anbindung von kleinbäuerlicher Kautschuk- und Palmölerzeugung in der Provinz Jambi"],["dc.relation","SFB 990 | C | C02: Soziale Transformationsprozesse und nachhaltige Ressourcennutzung im ländlichen Jambi"],["dc.relation","SFB 990 | C | C03: Culture-Specific Human Interaction with Tropical Lowland Rainforests in Transformation in Jambi, Sumatra"],["dc.relation","SFB 990 | C | C04: Mitigating trade-offs between economic and ecological functions and services through certification"],["dc.relation","SFB 990 | C | C06: Zum Verständnis des Zertifizierungs- und Wiederanpflanzungsverhaltens indonesischer Kleinbauern"],["dc.relation","SFB 990 | C | C07: Einflussfaktoren von Landnutzungswandel und sozioökonomische Auswirkungen für ländliche Haushalte"],["dc.relation","SFB 990 | C | C08: Design effektiver Politikinstrumente zur Förderung nachhaltiger Landnutzung"],["dc.relation.crisseries","EFForTS Discussion Paper Series"],["dc.relation.ispartofseries","EFForTS Discussion Paper Series;11"],["dc.relation.orgunit","Johann-Friedrich-Blumenbach-Institut für Zoologie und Anthropologie"],["dc.rights","CC BY-ND 4.0"],["dc.subject","Smallholders crop choice oil palm rubber Indonesia"],["dc.subject.gro","Smallholders; crop choice; oil palm; rubber; Indonesia"],["dc.subject.gro","sfb990_discussionpaperseries"],["dc.title","Rubber vs. oil palm: an analysis of factors influencing smallholders’ crop choice in Jambi, Indonesia"],["dc.type","working_paper"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","no"],["dc.type.version","unpublished"],["dspace.entity.type","Publication"]]