Fehrmann, Lutz

[["dc.bibliographiccitation.firstpage","14"],["dc.bibliographiccitation.journal","Environmental Modelling & Software"],["dc.bibliographiccitation.lastpage","26"],["dc.bibliographiccitation.volume","73"],["dc.contributor.author","Pérez-Cruzado, César"],["dc.contributor.author","Fehrmann, Lutz"],["dc.contributor.author","Magdon, Paul"],["dc.contributor.author","Cañellas, Isabel"],["dc.contributor.author","Sixto, Hortensia"],["dc.contributor.author","Kleinn, Christoph"],["dc.date.accessioned","2017-09-07T11:47:09Z"],["dc.date.available","2017-09-07T11:47:09Z"],["dc.date.issued","2015"],["dc.description.abstract","Tree biomass estimates in environmental studies are based on allometric models, which are known to vary with species, site, and other forest characteristics. The UNFCCC published a guideline to evaluate the appropriateness of biomass models before application, but it misleads the concept of model suitability and does also allow the selection of models with systematic deviations in the predictions. Here we present an alternative approach based on non-parametric techniques. The approach was tested for pure stands, but this methodology is likewise applicable to mixed forests. The proposed tests perform well in rejecting a model if the predictions for the targeted population are systematically deviant. It is demonstrated that the suitability of an allometric model is a matter of accuracy. The proposed method also allows localizing the model. The presented approach can improve the transparency of global forest monitoring systems and can be implemented with relatively small effort."],["dc.identifier.doi","10.1016/j.envsoft.2015.07.019"],["dc.identifier.gro","3149279"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/5938"],["dc.language.iso","en"],["dc.notes.intern","Kleinn Crossref Import"],["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 | 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.issn","1364-8152"],["dc.subject.gro","sfb990_journalarticles"],["dc.title","On the site-level suitability of biomass models"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","no"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","574"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","iForest - Biogeosciences and Forestry"],["dc.bibliographiccitation.lastpage","581"],["dc.bibliographiccitation.volume","8"],["dc.contributor.author","Nölke, Nils"],["dc.contributor.author","Fehrmann, Lutz"],["dc.contributor.author","Jaya, I. Nengah Surati"],["dc.contributor.author","Tiryana, Tatang"],["dc.contributor.author","Seidel, Dominik"],["dc.contributor.author","Kleinn, Christoph"],["dc.date.accessioned","2017-09-07T11:47:03Z"],["dc.date.available","2017-09-07T11:47:03Z"],["dc.date.issued","2015"],["dc.description.abstract","In many old-growth natural and close-to-natural forest types, notably in humid tropical forests, a relatively small number of very tall trees contribute considerably to stand basal area and biomass. Such trees often show distinct buttress roots with irregular non-convex shapes. Buttresses are complex structures in the lowest stem section, where most tree biomass is located. The methods used to assess the diameter of buttressed trees have a large impact on the determination of volume and biomass, as well as on the resulting estimates of the aboveground carbon stock in tropical forests. As the measurement of diameter at breast height (DBH at 1.3 m) is not feasible in such conditions, the diameter above buttress (DAB), where the cylindrical bole of the tree begins, is usually measured and included as an independent variable in biomass models. We conducted a methodological study aimed at determining the volume and biomass of individual buttressed trees belonging to several tropical species by the application of terrestrial laser scanning (TLS). The geometry and allometry of the buttresses, as well as the change with height along the stem in buttress volume and cross-sectional area were analyzed. Our results suggest that the relationship between cross-sectional areas at DAB height (ADAB) and the actual tree basal area measured at 1.3 m height is relatively strong (R² = 0.87) across a range of different species, buttress morphologies and tree dimensions. Furthermore, the change in stem cross-sectional area with tree height was surprisingly similar and smooth. Despite the small number of trees sampled, the methodological approach used in this study provided new insights on the very irregular geometry of buttressed trees. Our results may help improving the volume and biomass models for buttressed trees, that are crucial contributors to carbon stocks in tropical forests."],["dc.identifier.doi","10.3832/ifor1449-007"],["dc.identifier.gro","3149246"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/5902"],["dc.language.iso","en"],["dc.notes.intern","Kleinn Crossref Import"],["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 | 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.issn","1971-7458"],["dc.subject.gro","sfb990_journalarticles"],["dc.title","On the geometry and allometry of big-buttressed trees - a challenge for forest monitoring: new insights from 3D-modeling with terrestrial laser scanning"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","no"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1186"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Nature Communications"],["dc.bibliographiccitation.volume","11"],["dc.contributor.author","Grass, Ingo"],["dc.contributor.author","Kubitza, Christoph"],["dc.contributor.author","Krishna, Vijesh V."],["dc.contributor.author","Corre, Marife D."],["dc.contributor.author","Mußhoff, Oliver"],["dc.contributor.author","Pütz, Peter"],["dc.contributor.author","Drescher, Jochen"],["dc.contributor.author","Rembold, Katja"],["dc.contributor.author","Ariyanti, Eka Sulpin"],["dc.contributor.author","Barnes, Andrew D."],["dc.contributor.author","Brinkmann, Nicole"],["dc.contributor.author","Brose, Ulrich"],["dc.contributor.author","Brümmer, Bernhard"],["dc.contributor.author","Buchori, Damayanti"],["dc.contributor.author","Daniel, Rolf"],["dc.contributor.author","Darras, Kevin F. A."],["dc.contributor.author","Faust, Heiko"],["dc.contributor.author","Fehrmann, Lutz"],["dc.contributor.author","Hein, Jonas"],["dc.contributor.author","Hennings, Nina"],["dc.contributor.author","Hidayat, Purnama"],["dc.contributor.author","Hölscher, Dirk"],["dc.contributor.author","Jochum, Malte"],["dc.contributor.author","Knohl, Alexander"],["dc.contributor.author","Kotowska, Martyna M."],["dc.contributor.author","Krashevska, Valentyna"],["dc.contributor.author","Kreft, Holger"],["dc.contributor.author","Leuschner, Christoph"],["dc.contributor.author","Lobite, Neil Jun S."],["dc.contributor.author","Panjaitan, Rawati"],["dc.contributor.author","Polle, Andrea"],["dc.contributor.author","Potapov, Anton M."],["dc.contributor.author","Purnama, Edwine"],["dc.contributor.author","Qaim, Matin"],["dc.contributor.author","Röll, Alexander"],["dc.contributor.author","Scheu, Stefan"],["dc.contributor.author","Schneider, Dominik"],["dc.contributor.author","Tjoa, Aiyen"],["dc.contributor.author","Tscharntke, Teja"],["dc.contributor.author","Veldkamp, Edzo"],["dc.contributor.author","Wollni, Meike"],["dc.date.accessioned","2021-04-12T09:49:43Z"],["dc.date.available","2021-04-12T09:49:43Z"],["dc.date.issued","2020"],["dc.description.abstract","Land-use transitions can enhance the livelihoods of smallholder farmers but potential economic-ecological trade-offs remain poorly understood. Here, we present an interdisciplinary study of the environmental, social and economic consequences of land-use transitions in a tropical smallholder landscape on Sumatra, Indonesia. We find widespread biodiversity-profit trade-offs resulting from land-use transitions from forest and agroforestry systems to rubber and oil palm monocultures, for 26,894 aboveground and belowground species and whole-ecosystem multidiversity. Despite variation between ecosystem functions, profit gains come at the expense of ecosystem multifunctionality, indicating far-reaching ecosystem deterioration. We identify landscape compositions that can mitigate trade-offs under optimal land-use allocation but also show that intensive monocultures always lead to higher profits. These findings suggest that, to reduce losses in biodiversity and ecosystem functioning, changes in economic incentive structures through well-designed policies are urgently needed."],["dc.identifier.doi","10.1038/s41467-020-15013-5"],["dc.identifier.pmid","32132531"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/80644"],["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 | 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","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 | 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 | 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 | 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 | 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","SFB 990 | Z | Z02: Central Scientific Support Unit"],["dc.relation","SFB 990 | INF: Forschungsdatenmanagement und integrative statistische Datenanalyse"],["dc.relation.issn","2041-1723"],["dc.relation.orgunit","Zentrum für Biodiversität und Nachhaltige Landnutzung"],["dc.relation.orgunit","Department für Agrarökonomie und Rurale Entwicklung"],["dc.relation.orgunit","Abteilung Bioklimatologie"],["dc.rights","CC BY 4.0"],["dc.subject.gro","sfb990_journalarticles"],["dc.title","Trade-offs between multifunctionality and profit in tropical smallholder landscapes"],["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","3"],["dc.bibliographiccitation.journal","Ecology and Society"],["dc.bibliographiccitation.volume","25"],["dc.contributor.author","Merten, Jennifer"],["dc.contributor.author","Stiegler, Christian"],["dc.contributor.author","Hennings, Nina"],["dc.contributor.author","Purnama, Edwine S."],["dc.contributor.author","Röll, Alexander"],["dc.contributor.author","Agusta, Herdhata"],["dc.contributor.author","Dippold, Michaela A."],["dc.contributor.author","Fehrmann, Lutz"],["dc.contributor.author","Gunawan, Dodo"],["dc.contributor.author","Hölscher, Dirk"],["dc.contributor.author","Knohl, Alexander"],["dc.contributor.author","Kückes, Johanna"],["dc.contributor.author","Otten, Fenna"],["dc.contributor.author","Zemp, Delphine C."],["dc.contributor.author","Faust, Heiko"],["dc.date.accessioned","2021-02-10T15:27:00Z"],["dc.date.available","2021-02-10T15:27:00Z"],["dc.date.issued","2020"],["dc.identifier.doi","10.5751/ES-11678-250314"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/79677"],["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","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 | B11: Biodiversitäts-Anreicherung in Ölpalmen-Plantagen: Pflanzliche Sukzession und Integration"],["dc.relation","SFB 990 | C | C02: Soziale Transformationsprozesse und nachhaltige Ressourcennutzung im ländlichen Jambi"],["dc.relation.doi","10.5751/ES-11678-250314"],["dc.relation.issn","1708-3087"],["dc.relation.orgunit","Zentrum für Biodiversität und Nachhaltige Landnutzung"],["dc.relation.orgunit","Department für Nutzpflanzenwissenschaften"],["dc.relation.orgunit","Abteilung Bioklimatologie"],["dc.subject.gro","sfb990_journalarticles"],["dc.title","Flooding and land use change in Jambi Province, Sumatra: integrating local knowledge and scientific inquiry"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]