Stiegler, Christian

[["dc.bibliographiccitation.firstpage","1"],["dc.bibliographiccitation.journal","Geoscientific Model Development"],["dc.bibliographiccitation.lastpage","41"],["dc.contributor.author","Ali, Ashehad A."],["dc.contributor.author","Fan, Yuanchao"],["dc.contributor.author","Corre, Marife D."],["dc.contributor.author","Kotowska, Martyna M."],["dc.contributor.author","Hassler, Evelyn"],["dc.contributor.author","Moyano, Fernando E."],["dc.contributor.author","Stiegler, Christian"],["dc.contributor.author","Röll, Alexander"],["dc.contributor.author","Meijide, Ana"],["dc.contributor.author","Ringeler, Andre"],["dc.contributor.author","Leuschner, Christoph"],["dc.contributor.author","June, Tania"],["dc.contributor.author","Tarigan, Suria"],["dc.contributor.author","Kreft, Holger"],["dc.contributor.author","Hölscher, Dirk"],["dc.contributor.author","Xu, Chonggang"],["dc.contributor.author","Koven, Charles D."],["dc.contributor.author","Fisher, Rosie"],["dc.contributor.author","Veldkamp, Edzo"],["dc.contributor.author","Knohl, Alexander"],["dc.date.accessioned","2019-11-14T15:45:28Z"],["dc.date.available","2019-11-14T15:45:28Z"],["dc.date.issued","2018"],["dc.description.abstract","Land-use change has a strong impact on carbon, energy and water fluxes and its effect is particularly pronounced in tropical regions. Uncertainties exist in the prediction of future land-use change impacts on these fluxes by land surface models due to scarcity of suitable measured data for parametrization and poor representation of key biogeochemical processes associated with tropical vegetation types. Rubber plantations (Havea brasilliensis) are a crucial land-use type across tropical landscapes that has greatly expanded in recent decades. Here, we first synthesize the relevant data for describing the biogeochemical processes of rubber from our past measurement campaigns in Jambi province, Indonesia. We then use these data-sets to develop a rubber plant functional type (PFT) for the Community Land Model (CLM4.5). Field measured data from small-holder plantations on leaf litterfall, soil respiration, latex harvest, leaf area index, transpiration, net primary productivity, and above-ground and fine root biomass were used to develop and calibrate a new PFT-based model (CLM4.5-rubber). CLM-rubber predictions adequately captured the annual net primary productivity and above-ground biomass as well as the seasonal dynamics of leaf litterfall, soil respiration, soil moisture and leaf area index. All of the predicted water fluxes of CLM-rubber were very similar to a site-specific calibrated soil water model. Including temporal variations in leaf life span enabled CLM-rubber to better capture the seasonality of leaf litterfall. Increased sensitivity of stomata to soil water stress and the enhancement of growth and maintenance respiration of fine roots in response to soil nutrient limitation enabled CLM-rubber to capture the magnitude of transpiration and leaf area index. Since CLM-rubber predicted reasonably well the carbon and water use, we think that the current model can be used for larger-scale simulations within Jambi province because more than 99% of the rubber plantations are smallholder owned in Jambi province and have low soil fertility."],["dc.identifier.doi","10.5194/gmd-2018-236"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/62628"],["dc.language.iso","en"],["dc.relation.issn","1991-962X"],["dc.relation.orgunit","Abteilung Bioklimatologie"],["dc.title","Observation-based implementation of ecophysiological processes for a rubber plant functional type in the community land model (CLM4.5-rubber_v1)"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","359"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Forests"],["dc.bibliographiccitation.volume","12"],["dc.contributor.author","Ali, Ashehad A."],["dc.contributor.author","Nugroho, Branindityo"],["dc.contributor.author","Brambach, Fabian"],["dc.contributor.author","Jenkins, Michael W."],["dc.contributor.author","Pangle, Robert"],["dc.contributor.author","Stiegler, Christian"],["dc.contributor.author","Blei, Emanuel"],["dc.contributor.author","Cahyo, Andi Nur"],["dc.contributor.author","Irawan, Bambang"],["dc.contributor.author","Ariani, Rahmi"],["dc.contributor.author","June, Tania"],["dc.contributor.author","Veldkamp, Edzo"],["dc.contributor.author","Knohl, Alexander"],["dc.contributor.author","Moyano, Fernando E."],["dc.contributor.author","Olchev, Alexander"],["dc.contributor.author","Tarigan, Suria"],["dc.contributor.author","Corre, Marife D."],["dc.contributor.orcid","0000-0002-7328-306X"],["dc.creator.author","Ali, Ashehad"],["dc.date.accessioned","2021-04-12T09:57:40Z"],["dc.date.available","2021-04-12T09:57:40Z"],["dc.date.issued","2021"],["dc.description.abstract","Rainforest conversion to woody croplands impacts the carbon cycle via ecophysiological processes such as photosynthesis and autotrophic respiration. Changes in the carbon cycle associated with land-use change can be estimated through Land Surface Models (LSMs). The accuracy of carbon flux estimation in carbon fluxes associated with land-use change has been attributed to uncertainties in the model parameters affecting photosynthetic activity, which is a function of both carboxylation capacity (Vcmax) and electron transport capacity (Jmax). In order to reduce such uncertainties for common tropical woody crops and trees, in this study we measured Vcmax25 (Vcmax standardized to 25 °C), Jmax25 (Jmax standardized to 25 °C) and light-saturated photosynthetic capacity (Amax) of Elaeis guineensis Jacq. (oil palm), Hevea brasiliensis (rubber tree), and two native tree species, Eusideroxylon zwageri and Alstonia scholaris, in a converted landscape in Jambi province (Sumatra, Indonesia) at smallholder plantations. We considered three plantations; a monoculture rubber, a monoculture oil palm, and an agroforestry system (jungle rubber plantation), where rubber trees coexist with some native trees. We performed measurements on leaves at the lower part of the canopy, and used a scaling method based on exponential function to scale up photosynthetic capacity related traits to the top of the canopy. At the lower part of the canopy, we found (i) high Vcmax25 values for H. brasiliensis from monoculture rubber plantation and jungle rubber plantation that was linked to a high area-based leaf nitrogen content, and (ii) low value of Amax for E. guineensis from oil palm plantation that was due to a low value of Vcmax25 and a high value of dark respiration. At the top of the canopy, Amax varied much more than Vcmax25 among different land-use types. We found that photosynthetic capacity declined fastest from the top to the lower part of the canopy in oil palm plantations. We demonstrate that photosynthetic capacity related traits measured at the lower part of the canopy can be successfully scaled up to the top of the canopy. We thus provide helpful new data that can be used to constrain LSMs that simulate land-use change related to rubber and oil palm expansion."],["dc.identifier.doi","10.3390/f12030359"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/80655"],["dc.identifier.url","https://publications.goettingen-research-online.de/handle/2/80655"],["dc.language.iso","en"],["dc.notes.intern","DeepGreen Import"],["dc.relation","SFB 990: Ökologische und sozioökonomische Funktionen tropischer Tieflandregenwald-Transformationssysteme (Sumatra, Indonesien)"],["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 | A | A07: Räumlich-zeitliche Skalierung des Einflusses von Landnutzung und Klimawandel auf Landnutzungssysteme in Indonesien"],["dc.relation","SFB 990 | B | B06: Taxonomische, funktionelle, phylogenetische und biogeographische Diversität vaskulärer Pflanzen in Regenwald-Transformationssystemen auf Sumatra (Indonesien)"],["dc.relation.doi","10.3390/f12030359"],["dc.relation.eissn","1999-4907"],["dc.relation.issn","1999-4907"],["dc.relation.orgunit","Zentrum für Biodiversität und Nachhaltige Landnutzung"],["dc.relation.orgunit","Abteilung Bioklimatologie"],["dc.rights","https://creativecommons.org/licenses/by/4.0/"],["dc.subject.gro","sfb990_journalarticles"],["dc.title","Using a Bottom-Up Approach to Scale Leaf Photosynthetic Traits of Oil Palm, Rubber, and Two Coexisting Tropical Woody Species"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.journal","Frontiers in Forests and Global Change"],["dc.bibliographiccitation.volume","2"],["dc.contributor.affiliation","Darras, Kevin F. A.; 1Agroecology, Department of Crop Sciences, University of Göttingen, Göttingen, Germany"],["dc.contributor.affiliation","Corre, Marife D.; 2Soil Science of Tropical and Subtropical Ecosystems, Faculty of Forest Sciences and Forest Ecology, University of Göttingen, Göttingen, Germany"],["dc.contributor.affiliation","Formaglio, Greta; 2Soil Science of Tropical and Subtropical Ecosystems, Faculty of Forest Sciences and Forest Ecology, University of Göttingen, Göttingen, Germany"],["dc.contributor.affiliation","Tjoa, Aiyen; 3Agriculture Faculty, Tadulako University, Palu, Indonesia"],["dc.contributor.affiliation","Potapov, Anton; 4Department of Animal Ecology, J. F. Blumenbach Institute of Zoology and Anthropology, University of Göttingen, Göttingen, Germany"],["dc.contributor.affiliation","Brambach, Fabian; 6Biodiversity, Macroecology and Biogeography, University of Göttingen, Göttingen, Germany"],["dc.contributor.affiliation","Sibhatu, Kibrom T.; 7Department of Agricultural Economics and Rural Development, University of Göttingen, Göttingen, Germany"],["dc.contributor.affiliation","Grass, Ingo; 1Agroecology, Department of Crop Sciences, University of Göttingen, Göttingen, Germany"],["dc.contributor.affiliation","Rubiano, Andres Angulo; 1Agroecology, Department of Crop Sciences, University of Göttingen, Göttingen, Germany"],["dc.contributor.affiliation","Buchori, Damayanti; 9Department of Plant Protection, IPB University, Bogor, Indonesia"],["dc.contributor.affiliation","Drescher, Jochen; 4Department of Animal Ecology, J. F. Blumenbach Institute of Zoology and Anthropology, University of Göttingen, Göttingen, Germany"],["dc.contributor.affiliation","Fardiansah, Riko; 10Collaborative Research Centre 990, University of Jambi, Jambi, Indonesia"],["dc.contributor.affiliation","Hölscher, Dirk; 11Tropical Silviculture and Forest Ecology, University of Göttingen, Göttingen, Germany"],["dc.contributor.affiliation","Irawan, Bambang; 12Forestry Faculty, University of Jambi, Jambi, Indonesia"],["dc.contributor.affiliation","Kneib, Thomas; 13Chair of Statistics, University of Göttingen, Göttingen, Germany"],["dc.contributor.affiliation","Krashevska, Valentyna; 4Department of Animal Ecology, J. F. Blumenbach Institute of Zoology and Anthropology, University of Göttingen, Göttingen, Germany"],["dc.contributor.affiliation","Krause, Alena; 4Department of Animal Ecology, J. F. Blumenbach Institute of Zoology and Anthropology, University of Göttingen, Göttingen, Germany"],["dc.contributor.affiliation","Kreft, Holger; 6Biodiversity, Macroecology and Biogeography, University of Göttingen, Göttingen, Germany"],["dc.contributor.affiliation","Li, Kevin; 1Agroecology, Department of Crop Sciences, University of Göttingen, Göttingen, Germany"],["dc.contributor.affiliation","Maraun, Mark; 4Department of Animal Ecology, J. F. Blumenbach Institute of Zoology and Anthropology, University of Göttingen, Göttingen, Germany"],["dc.contributor.affiliation","Polle, Andrea; 14Forest Botany and Tree Physiology, University of Göttingen, Göttingen, Germany"],["dc.contributor.affiliation","Ryadin, Aisjah R.; 14Forest Botany and Tree Physiology, University of Göttingen, Göttingen, Germany"],["dc.contributor.affiliation","Rembold, Katja; 6Biodiversity, Macroecology and Biogeography, University of Göttingen, Göttingen, Germany"],["dc.contributor.affiliation","Stiegler, Christian; 18Bioclimatology, University of Göttingen, Göttingen, Germany"],["dc.contributor.affiliation","Scheu, Stefan; 4Department of Animal Ecology, J. F. Blumenbach Institute of Zoology and Anthropology, University of Göttingen, Göttingen, Germany"],["dc.contributor.affiliation","Tarigan, Suria; 19Department of Soil Sciences and Land Resources Management, IPB University, Bogor, Indonesia"],["dc.contributor.affiliation","Valdés-Uribe, Alejandra; 11Tropical Silviculture and Forest Ecology, University of Göttingen, Göttingen, Germany"],["dc.contributor.affiliation","Yadi, Supri; 9Department of Plant Protection, IPB University, Bogor, Indonesia"],["dc.contributor.affiliation","Tscharntke, Teja; 1Agroecology, Department of Crop Sciences, University of Göttingen, Göttingen, Germany"],["dc.contributor.affiliation","Veldkamp, Edzo; 2Soil Science of Tropical and Subtropical Ecosystems, Faculty of Forest Sciences and Forest Ecology, University of Göttingen, Göttingen, Germany"],["dc.contributor.author","Darras, Kevin F. A."],["dc.contributor.author","Corre, Marife D."],["dc.contributor.author","Formaglio, Greta"],["dc.contributor.author","Tjoa, Aiyen"],["dc.contributor.author","Potapov, Anton"],["dc.contributor.author","Brambach, Fabian"],["dc.contributor.author","Sibhatu, Kibrom T."],["dc.contributor.author","Grass, Ingo"],["dc.contributor.author","Rubiano, Andres Angulo"],["dc.contributor.author","Buchori, Damayanti"],["dc.contributor.author","Drescher, Jochen"],["dc.contributor.author","Fardiansah, Riko"],["dc.contributor.author","Hölscher, Dirk"],["dc.contributor.author","Irawan, Bambang"],["dc.contributor.author","Kneib, Thomas"],["dc.contributor.author","Krashevska, Valentyna"],["dc.contributor.author","Krause, Alena"],["dc.contributor.author","Kreft, Holger"],["dc.contributor.author","Li, Kevin"],["dc.contributor.author","Maraun, Mark"],["dc.contributor.author","Polle, Andrea"],["dc.contributor.author","Ryadin, Aisjah R."],["dc.contributor.author","Rembold, Katja"],["dc.contributor.author","Stiegler, Christian"],["dc.contributor.author","Scheu, Stefan"],["dc.contributor.author","Tarigan, Suria"],["dc.contributor.author","Valdés-Uribe, Alejandra"],["dc.contributor.author","Yadi, Supri"],["dc.contributor.author","Tscharntke, Teja"],["dc.contributor.author","Veldkamp, Edzo"],["dc.date.accessioned","2019-12-17T15:35:22Z"],["dc.date.available","2019-12-17T15:35:22Z"],["dc.date.issued","2019"],["dc.date.updated","2022-09-06T08:10:07Z"],["dc.description.abstract","Oil palm plantations are intensively managed agricultural systems that increasingly dominate certain tropical regions. Oil palm monocultures have been criticized because of their reduced biodiversity compared to the forests they historically replaced, and because of their negative impact on soils, water, and climate. We experimentally test whether less intensive management schemes may enhance biodiversity and lessen detrimental effects on the environment while maintaining high yields. We compare reduced vs. conventional fertilization, as well as mechanical vs. chemical weed control (with herbicides) in a long-term, full-factorial, multidisciplinary experiment. We conducted the experiment in an oil palm company estate in Sumatra, Indonesia, and report the results of the first 2 years. We measured soil nutrients and functions, surveyed above- and below-ground organisms, tracked oil palm condition and productivity, and calculated plantation gross margins. Plants, aboveground arthropods, and belowground animals were positively affected by mechanical vs. chemical weed control, but we could not detect effects on birds and bats. There were no detectable negative effects of reduced fertilization or mechanical weeding on oil palm yields, fine roots, or leaf area index. Also, we could not detect detrimental effects of the reduced fertilization and mechanical weeding on soil nutrients and functions (mineral nitrogen, bulk density, and litter decomposition), but water infiltration and base saturation tended to be higher under mechanical weeding, while soil moisture, and microbial biomass varied with treatment. Economic performance, measured as gross margins, was higher under reduced fertilization. There might be a delayed response of oil palm to the different management schemes applied, so results of future years may confirm whether this is a sustainable management strategy. Nevertheless, the initial effects of the experiment are encouraging to consider less intensive management practices as economically and ecologically viable options for oil palm plantations."],["dc.identifier.doi","10.3389/ffgc.2019.00065"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/62760"],["dc.language.iso","en"],["dc.relation","SFB 990: Ökologische und sozioökonomische Funktionen tropischer Tieflandregenwald-Transformationssysteme (Sumatra, Indonesien)"],["dc.relation","SFB 990 | A | A02: Wassernutzungseigenschaften von Bäumen und Palmen in Regenwald-Transformationssystemen Zusammenfassung"],["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 | A | A07: Räumlich-zeitliche Skalierung des Einflusses von Landnutzung und Klimawandel auf Landnutzungssysteme in Indonesien"],["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 | B07: Functional diversity of mycorrhizal fungi along a tropical land-use gradient"],["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 | 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 | C07: Einflussfaktoren von Landnutzungswandel und sozioökonomische Auswirkungen für ländliche Haushalte"],["dc.relation.eissn","2624-893X"],["dc.relation.issn","2624-893X"],["dc.relation.orgunit","Zentrum für Biodiversität und Nachhaltige Landnutzung"],["dc.relation.orgunit","Abteilung Bioklimatologie"],["dc.rights","CC BY 4.0"],["dc.rights.uri","http://creativecommons.org/licenses/by/4.0/"],["dc.subject.gro","sfb990_journalarticles"],["dc.title","Reducing Fertilizer and Avoiding Herbicides in Oil Palm Plantations - Ecological and Economic Valuations"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Nature Communications"],["dc.bibliographiccitation.volume","11"],["dc.contributor.author","Meijide Orive, Ana"],["dc.contributor.author","de la Rua, Cristina"],["dc.contributor.author","Guillaume, Thomas"],["dc.contributor.author","Röll, Alexander"],["dc.contributor.author","Hassler, Evelyn"],["dc.contributor.author","Stiegler, Christian"],["dc.contributor.author","Tjoa, Aiyen"],["dc.contributor.author","June, Tania"],["dc.contributor.author","Corre, Marife D."],["dc.contributor.author","Veldkamp, Edzo"],["dc.contributor.author","Knohl, Alexander"],["dc.date.accessioned","2020-12-10T18:09:53Z"],["dc.date.available","2020-12-10T18:09:53Z"],["dc.date.issued","2020"],["dc.description.abstract","The potential of palm-oil biofuels to reduce greenhouse gas (GHG) emissions compared with fossil fuels is increasingly questioned. So far, no measurement-based GHG budgets were available, and plantation age was ignored in Life Cycle Analyses (LCA). Here, we conduct LCA based on measured CO2, CH4 and N2O fluxes in young and mature Indonesian oil palm plantations. CO2 dominates the on-site GHG budgets. The young plantation is a carbon source (1012 ± 51 gC m−2 yr−1), the mature plantation a sink (−754 ± 38 gC m−2 yr−1). LCA considering the measured fluxes shows higher GHG emissions for palm-oil biodiesel than traditional LCA assuming carbon neutrality. Plantation rotation-cycle extension and earlier-yielding varieties potentially decrease GHG emissions. Due to the high emissions associated with forest conversion to oil palm, our results indicate that only biodiesel from second rotation-cycle plantations or plantations established on degraded land has the potential for pronounced GHG emission savings."],["dc.identifier.doi","10.1038/s41467-020-14852-6"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/73788"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["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 | A04: Carbon stock, turnover and functions in heavily weathered soils under lowland rainforest transformation systems"],["dc.relation","SFB 990 | A | A05: Optimierung des Nährstoffmanagements in Ölpalmplantagen und Hochrechnung plot-basierter Treibhausgasflüsse auf die Landschaftsebene transformierter Regenwälder"],["dc.relation.orgunit","Zentrum für Biodiversität und Nachhaltige Landnutzung"],["dc.relation.orgunit","Department für Nutzpflanzenwissenschaften"],["dc.relation.orgunit","Fakultät für Agrarwissenschaften"],["dc.relation.orgunit","Abteilung Pflanzenbau"],["dc.relation.orgunit","Abteilung Bioklimatologie"],["dc.rights","CC BY 4.0"],["dc.subject.gro","sfb990_journalarticles"],["dc.title","Measured greenhouse gas budgets challenge emission savings from palm-oil biodiesel"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]