Salecker, Jan

[["dc.bibliographiccitation.firstpage","1539"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Biological Reviews"],["dc.bibliographiccitation.lastpage","1569"],["dc.bibliographiccitation.volume","92"],["dc.contributor.author","Dislich, Claudia"],["dc.contributor.author","Keyel, Alexander C."],["dc.contributor.author","Salecker, Jan"],["dc.contributor.author","Kisel, Yael"],["dc.contributor.author","Meyer, Katrin M."],["dc.contributor.author","Auliya, Mark"],["dc.contributor.author","Barnes, Andrew D."],["dc.contributor.author","Corre, Marife D."],["dc.contributor.author","Darras, Kevin"],["dc.contributor.author","Faust, Heiko"],["dc.contributor.author","Hess, Bastian"],["dc.contributor.author","Klasen, Stephan"],["dc.contributor.author","Knohl, Alexander"],["dc.contributor.author","Kreft, Holger"],["dc.contributor.author","Meijide, Ana"],["dc.contributor.author","Nurdiansyah, Fuad"],["dc.contributor.author","Otten, Fenna"],["dc.contributor.author","Pe'er, Guy"],["dc.contributor.author","Steinebach, Stefanie"],["dc.contributor.author","Tarigan, Suria"],["dc.contributor.author","Tölle, Merja H."],["dc.contributor.author","Tscharntke, Teja"],["dc.contributor.author","Wiegand, Kerstin"],["dc.date.accessioned","2017-09-07T11:44:46Z"],["dc.date.available","2017-09-07T11:44:46Z"],["dc.date.issued","2017"],["dc.description.abstract","Oil palm plantations have expanded rapidly in recent decades. This large-scale land-use change has had great ecological, economic, and social impacts on both the areas converted to oil palm and their surroundings. However, research on the impacts of oil palm cultivation is scattered and patchy, and no clear overview exists. We address this gap through a systematic and comprehensive literature review of all ecosystem functions in oil palm plantations, including several (genetic, medicinal and ornamental resources, information functions) not included in previous systematic reviews. We compare ecosystem functions in oil palm plantations to those in forests, as the conversion of forest to oil palm is prevalent in the tropics. We find that oil palm plantations generally have reduced ecosystem functioning compared to forests: 11 out of 14 ecosystem functions show a net decrease in level of function. Some functions show decreases with potentially irreversible global impacts (e.g. reductions in gas and climate regulation, habitat and nursery functions, genetic resources, medicinal resources, and information functions). The most serious impacts occur when forest is cleared to establish new plantations, and immediately afterwards, especially on peat soils. To variable degrees, specific plantation management measures can prevent or reduce losses of some ecosystem functions (e.g. avoid illegal land clearing via fire, avoid draining of peat, use of integrated pest management, use of cover crops, mulch, and compost) and we highlight synergistic mitigation measures that can improve multiple ecosystem functions simultaneously. The only ecosystem function which increases in oil palm plantations is, unsurprisingly, the production of marketable goods. Our review highlights numerous research gaps. In particular, there are significant gaps with respect to socio-cultural information functions. Further, there is a need for more empirical data on the importance of spatial and temporal scales, such as differences among plantations in different environments, of different sizes, and of different ages, as our review has identified examples where ecosystem functions vary spatially and temporally. Finally, more research is needed on developing management practices that can offset the losses of ecosystem functions. Our findings should stimulate research to address the identified gaps, and provide a foundation for more systematic research and discussion on ways to minimize the negative impacts and maximize the positive impacts of oil palm cultivation."],["dc.identifier.doi","10.1111/brv.12295"],["dc.identifier.fs","621226"],["dc.identifier.gro","3148957"],["dc.identifier.pmid","27511961"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/14337"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/5600"],["dc.language.iso","en"],["dc.notes.intern","Wiegand 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 | B | B10: Landschaftsbezogene Bewertung der ökologischen und sozioökonomischen Funktionen von Regenwald- Transformationssystemen in Sumatra (Indonesien)"],["dc.relation.issn","1464-7931"],["dc.relation.orgunit","Abteilung Ökosystemmodellierung"],["dc.relation.orgunit","Wirtschaftswissenschaftliche Fakultät"],["dc.relation.orgunit","Abteilung Bioklimatologie"],["dc.rights","CC BY-NC 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by-nc/4.0/"],["dc.subject.gro","Elaeis guineensis"],["dc.subject.gro","biodiversity"],["dc.subject.gro","ecosystem functions"],["dc.subject.gro","ecosystem services"],["dc.subject.gro","land-use change"],["dc.subject.gro","oil palm"],["dc.subject.gro","sfb990_journalarticles"],["dc.title","A review of the ecosystem functions in oil palm plantations, using forests as a reference system"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1854"],["dc.bibliographiccitation.issue","11"],["dc.bibliographiccitation.journal","Methods in Ecology and Evolution"],["dc.bibliographiccitation.lastpage","1863"],["dc.bibliographiccitation.volume","10"],["dc.contributor.author","Salecker, Jan"],["dc.contributor.author","Sciaini, Marco"],["dc.contributor.author","Meyer, Katrin M."],["dc.contributor.author","Wiegand, Kerstin"],["dc.date.accessioned","2020-12-10T18:26:41Z"],["dc.date.available","2020-12-10T18:26:41Z"],["dc.date.issued","2019"],["dc.description.abstract","1.Agent-based models find wide application in all fields of science where large scale patterns emerge from properties of individuals. Due to increasing capacities of computing resources it was possible to improve the level of detail and structural realism of next-generation models in recent years. However, this is at the expense of increased model complexity, which requires more efficient tools for model exploration, analysis and documentation that enable reproducibility, repeatability and parallelisation. NetLogo is a widely used environment for agent-based model development, but it does not provide sufficient built-in tools for extensive model exploration, such as sensitivity analyses. One tool for controlling NetLogo externally is the R-package RNetLogo. However, this package is not suited for efficient, reproducible research as it has stability and resource allocation issues, is not straightforward to be setup and used on high performance computing clusters and does not provide utilities, such as storing and exchanging metadata, in an easy way. 2.We present the R-package nlrx, which overcomes stability and resource allocation issues by running NetLogo simulations via dynamically created XML experiment files. Class objects make setting up experiments more convenient and helper functions provide many parameter exploration approaches, such as Latin Hypercube designs, Sobol sensitivity analyses or optimization approaches. Output is automatically collected in user-friendly formats and can be post-processed with provided utility functions. nlrx enables reproducibility by storing all relevant information and simulation output of experiments in one R object which can conveniently be archived and shared. 3.We provide a detailed description of the nlrx package functions and the overall workflow. We also present a use case scenario using a NetLogo model, for which we performed a sensitivity analysis and a genetic algorithm optimization. 4.The nlrx package is the first framework for documentation and application of reproducible NetLogo simulation model analysis."],["dc.description.sponsorship","Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659"],["dc.identifier.doi","10.1111/2041-210X.13286"],["dc.identifier.issn","2041-210X"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/16518"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/76155"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.notes.intern","Merged from goescholar"],["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.issn","2041-210X"],["dc.relation.orgunit","Zentrum für Biodiversität und Nachhaltige Landnutzung"],["dc.relation.orgunit","Abteilung Ökosystemmodellierung"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.subject.gro","agent-based modelling"],["dc.subject.gro","individual-based modelling"],["dc.subject.gro","reproducible workflow"],["dc.subject.gro","R package"],["dc.subject.gro","NetLogo"],["dc.subject.gro","sfb990_journalarticles"],["dc.title","The nlrx r package: A next‐generation framework for reproducible NetLogo model analyses"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","125"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Current Landscape Ecology Reports"],["dc.bibliographiccitation.lastpage","138"],["dc.bibliographiccitation.volume","4"],["dc.contributor.author","Paul, Carola"],["dc.contributor.author","Reith, Esther"],["dc.contributor.author","Salecker, Jan"],["dc.contributor.author","Knoke, Thomas"],["dc.date.accessioned","2020-01-30T16:25:50Z"],["dc.date.available","2020-01-30T16:25:50Z"],["dc.date.issued","2019"],["dc.description.abstract","Purpose of Review The purpose of this review is to analyse recent advances in ecological-economic modelling designed to inform desirable landscape composition and configuration. We explore how models capture the economic and ecological consequences of landscape pattern, and potential feedbacks to the responses by policy or landholders. Recent Findings Modelling approaches are becoming increasingly interlinked, coupling components of empirical-statistical modelling, spatial and bioeconomic simulation, land-use optimization and agent-based models. We analyse recent methodological advances and find that only few examples capture feedbacks between landscape pattern and decision-making. Summary We outline how future hybrid models could build on these recent advances by inter alia an improved representation of landscape patterns, refining the theory behind decision-making, incorporating uncertainty and reducing model complexity. We conclude that coupling recent developments in land-use optimization and agent-based models may help bridge gaps between modelling philosophies as well as parsimony vs. complexity. This fruitful field of research could help to improve understanding on the role of landscape pattern in social-ecological systems."],["dc.identifier.doi","10.1007/s40823-019-00046-4"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/62913"],["dc.language.iso","en"],["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 | C12: Partizipative Landnutzungsmodellierung zur Vereinbarung ökologischer und ökonomischer Funktionen"],["dc.relation.issn","2364-494X"],["dc.relation.orgunit","Abteilung Ökosystemmodellierung"],["dc.relation.orgunit","Abteilung Forstökonomie und nachhaltige Landnutzungsplanung"],["dc.subject.gro","Bioeconomic modelling"],["dc.subject.gro","Social-economic models"],["dc.subject.gro","Portfolio analysis"],["dc.subject.gro","Landscape metrics"],["dc.subject.gro","Ecosystem services"],["dc.subject.gro","Trade-offs"],["dc.subject.gro","sfb990_journalarticles"],["dc.title","How Integrated Ecological-Economic Modelling Can Inform Landscape Pattern in Forest Agroecosystems"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","e06272"],["dc.bibliographiccitation.issue","12"],["dc.bibliographiccitation.journal","Ecography"],["dc.bibliographiccitation.volume","2022"],["dc.contributor.author","Simpkins, Craig Eric"],["dc.contributor.author","Hanß, Sebastian"],["dc.contributor.author","Spangenberg, M. C."],["dc.contributor.author","Salecker, Jan"],["dc.contributor.author","Hesselbarth, Maximilian H. K."],["dc.contributor.author","Wiegand, Kerstin"],["dc.date.accessioned","2022-10-25T09:40:17Z"],["dc.date.available","2022-10-25T09:40:17Z"],["dc.date.issued","2022"],["dc.description.abstract","An understanding of how biodiversity is distributed across space is key to much of ecology and conservation. Many predictive modelling approaches have been developed to estimate the distribution of biodiversity over various spatial scales. Community modelling techniques may offer many benefits over single species modelling. However, techniques capable of estimating precise species makeups of communities are highly data intensive and thus often limited in their applicability. Here we present an R package, spectre, which can predict regional community composition at a fine spatial resolution using only sparsely sampled biological data. The package can predict the presences and absences of all species in an area, both known and unknown, at the sample site scale. Underlying the spectre package is a min-conflicts optimisation algorithm that predicts species' presences and absences throughout an area using estimates of α-, β- and γ-diversity. We demonstrate the utility of the spectre package using a spatially-explicit simulated ecosystem to assess the accuracy of the package's results. spectre offers a simple to use tool with which to accurately predict community compositions across varying scales, facilitating further research and knowledge acquisition into this fundamental aspect of ecology."],["dc.identifier.doi","10.1111/ecog.06272"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/116496"],["dc.language.iso","en"],["dc.relation.issn","0906-7590"],["dc.relation.issn","1600-0587"],["dc.relation.orgunit","Abteilung Ökosystemmodellierung"],["dc.relation.orgunit","Zentrum für Biodiversität und Nachhaltige Landnutzung"],["dc.rights","CC BY 3.0"],["dc.title","spectre: an R package to estimate spatially‐explicit community composition using sparse data"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","e0190506"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","PLOS ONE"],["dc.bibliographiccitation.volume","13"],["dc.contributor.author","Dislich, Claudia"],["dc.contributor.author","Hettig, Elisabeth"],["dc.contributor.author","Salecker, Jan"],["dc.contributor.author","Heinonen, Johannes"],["dc.contributor.author","Lay, Jann"],["dc.contributor.author","Meyer, Katrin M."],["dc.contributor.author","Wiegand, Kerstin"],["dc.contributor.author","Tarigan, Suria"],["dc.date.accessioned","2019-07-09T11:45:08Z"],["dc.date.available","2019-07-09T11:45:08Z"],["dc.date.issued","2018"],["dc.description.abstract","Land-use changes have dramatically transformed tropical landscapes. We describe an ecological-economic land-use change model as an integrated, exploratory tool used to analyze how tropical land-use change affects ecological and socio-economic functions. The model analysis seeks to determine what kind of landscape mosaic can improve the ensemble of ecosystem functioning, biodiversity, and economic benefit based on the synergies and trade-offs that we have to account for. More specifically, (1) how do specific ecosystem functions, such as carbon storage, and economic functions, such as household consumption, relate to each other? (2) How do external factors, such as the output prices of crops, affect these relationships? (3) How do these relationships change when production inefficiency differs between smallholder farmers and learning is incorporated? We initialize the ecological-economic model with artificially generated land-use maps parameterized to our study region. The economic sub-model simulates smallholder land-use management decisions based on a profit maximization assumption. Each household determines factor inputs for all household fields and decides on land-use change based on available wealth. The ecological sub-model includes a simple account of carbon sequestration in above-ground and below-ground vegetation. We demonstrate model capabilities with results on household consumption and carbon sequestration from different output price and farming efficiency scenarios. The overall results reveal complex interactions between the economic and ecological spheres. For instance, model scenarios with heterogeneous crop-specific household productivity reveal a comparatively high inertia of land-use change. Our model analysis even shows such an increased temporal stability in landscape composition and carbon stocks of the agricultural area under dynamic price trends. These findings underline the utility of ecological-economic models, such as ours, to act as exploratory tools which can advance our understanding of the mechanisms underlying the trade-offs and synergies of ecological and economic functions in tropical landscapes."],["dc.identifier.doi","10.1371/journal.pone.0190506"],["dc.identifier.pmid","29351290"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/15038"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/59163"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["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.issn","1932-6203"],["dc.relation.orgunit","Abteilung Ökosystemmodellierung"],["dc.relation.orgunit","Zentrum für Biodiversität und Nachhaltige Landnutzung"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0/"],["dc.subject.ddc","570"],["dc.subject.gro","sfb990_journalarticles"],["dc.subject.mesh","Arecaceae"],["dc.subject.mesh","Carbon Sequestration"],["dc.subject.mesh","Conservation of Natural Resources"],["dc.subject.mesh","Crops, Agricultural"],["dc.subject.mesh","Ecosystem"],["dc.subject.mesh","Models, Theoretical"],["dc.subject.mesh","Palm Oil"],["dc.subject.mesh","Tropical Climate"],["dc.title","Land-use change in oil palm dominated tropical landscapes-An agent-based model to explore ecological and socio-economic trade-offs."],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.seriesnr","16"],["dc.contributor.author","Dislich, Claudia"],["dc.contributor.author","Keyel, Alexander C."],["dc.contributor.author","Salecker, Jan"],["dc.contributor.author","Kisel, Yael"],["dc.contributor.author","Meyer, Katrin M."],["dc.contributor.author","Corre, Marife D."],["dc.contributor.author","Faust, Heiko"],["dc.contributor.author","Hess, Bastian"],["dc.contributor.author","Knohl, Alexander"],["dc.contributor.author","Kreft, Holger"],["dc.contributor.author","Meijide, Ana"],["dc.contributor.author","Nurdiansyah, Fuad"],["dc.contributor.author","Otten, Fenna"],["dc.contributor.author","Pe’er, Guy"],["dc.contributor.author","Steinebach, Stefanie"],["dc.contributor.author","Tarigan, Suria"],["dc.contributor.author","Tscharntke, Teja"],["dc.contributor.author","Tölle, Merja"],["dc.contributor.author","Wiegand, Kerstin"],["dc.date.accessioned","2022-05-19T10:11:54Z"],["dc.date.available","2022-05-19T10:11:54Z"],["dc.date.issued","2015-06"],["dc.description.abstract","Oil palm plantations have expanded rapidly in the last decades. This large-scale land-use change has had great impacts on both the areas converted to oil palm and their surroundings. However, research on the impacts of oil palm agriculture is scattered and patchy, and no clear overview exists. Here, we address this gap through a systematic and comprehensive literature review of all ecosystem functions in oil palm plantations. We compare ecosystem functions in oil palm plantations to those in forests as forests are often cleared for the establishment of oil palm. We find that oil palm plantations generally have reduced ecosystem functioning compared to forests. Some of these functions are lost globally, such as those to gas and climate regulation and to habitat and nursery functions. The most serious impacts occur when land is cleared to establish new plantations, and immediately afterwards, especially on peat soils. To variable degrees, plantation management can prevent or reduce losses of some ecosystem functions. The only ecosystem function which increased in oil palm plantations is, unsurprisingly, the production of marketable goods. Our review highlights numerous research gaps. In particular, there are significant gaps with respect to information functions (socio-cultural functions). There is a need for empirical data on the importance of spatial and temporal scales, such as the differences between plantations in different environments, of different sizes, and of different ages. Finally, more research is needed on developing management practices that can off-set the losses of ecosystem functions. Our findings should stimulate research to address the identified gaps, and provide a foundation for more systematic research and discussion on ways to minimize the negative impacts and maximize the positive impacts of oil palm agriculture."],["dc.format.extent","IV, 55"],["dc.identifier.ppn","829081887"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/108099"],["dc.language.iso","en"],["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 | 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 | B06: Taxonomische, funktionelle, phylogenetische und biogeographische Diversität vaskulärer Pflanzen in Regenwald-Transformationssystemen auf Sumatra (Indonesien)"],["dc.relation","SFB 990 | B | B09: Oberirdische Biodiversitätsmuster und Prozesse in Regenwaldtransformations-Landschaften"],["dc.relation","SFB 990 | B | B10: Landschaftsbezogene Bewertung der ökologischen und sozioökonomischen Funktionen von Regenwald- Transformationssystemen in Sumatra (Indonesien)"],["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.crisseries","EFForTS Discussion Paper Series"],["dc.relation.orgunit","Johann-Friedrich-Blumenbach-Institut für Zoologie und Anthropologie"],["dc.rights","CC BY-ND 4.0"],["dc.subject.gro","ecosystem functions; ecosystem services; biodiversity; oil palm; land-use change; Elaeis guineensis; review"],["dc.subject.gro","sfb990_discussionpaperseries"],["dc.title","Ecosystem functions of oil palm plantations"],["dc.title.subtitle","a review"],["dc.type","working_paper"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","103944"],["dc.bibliographiccitation.journal","Journal of Economic Dynamics and Control"],["dc.bibliographiccitation.volume","117"],["dc.contributor.author","Kopp, Thomas"],["dc.contributor.author","Salecker, Jan"],["dc.date.accessioned","2020-12-08T08:09:28Z"],["dc.date.available","2020-12-08T08:09:28Z"],["dc.date.issued","2020"],["dc.description.abstract","Marketing channel choices in agricultural trade networks affect the networks\\’ overall performance and influence rural livelihoods. This study identifies key determinants of these choices among natural rubber traders in Indonesia to evaluate four policy scenarios and their potential effects on rural incomes. Since traders\\’ marketing decisions are based on past interactions, resulting trade networks are formed in recursive processes and can be understood as complex adaptive systems. Due to inherent endogeneity in these systems, process-based approaches such as agent-based modelling (ABM) can be effective in understanding them. Using a self-gathered primary dataset from Jambi Province, Indonesia, we implement and parameterise an ABM to simulate the formation of the rubber trading network and analyse the effects on rural livelihoods of four hypothetical policy scenarios: improved micro-credit availability, increased access to education, better infrastructure and transportation capacity, and market information availability. The model is calibrated through a genetic algorithm which maximises the similarity between the simulated network and the actual network observed in the data. Results indicate that sellers\\’ decisions on a buyer are primarily determined by debt obligations and past peer-interactions. The most influential sellers have a similar level of formal education as their peers and live in close physical proximity. Results of the policy scenario analysis suggests that policies aimed at reducing sellers\\’ dependence on credit from buyers and increasing education are the most effective policies for improving value chains and reducing poverty in the region under consideration."],["dc.identifier.doi","10.1016/j.jedc.2020.103944"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/69458"],["dc.language.iso","en"],["dc.relation.issn","0165-1889"],["dc.relation.orgunit","Abteilung Ökosystemmodellierung"],["dc.subject.gro","Agent-based modelling"],["dc.subject.gro","Complex adaptive systems"],["dc.subject.gro","Networks"],["dc.subject.gro","Rubber"],["dc.subject.gro","Indonesia"],["dc.subject.gro","Agricultural trade"],["dc.title","How traders influence their neighbours: Modelling social evolutionary processes and peer effects in agricultural trade networks"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","e0222949"],["dc.bibliographiccitation.issue","9"],["dc.bibliographiccitation.journal","PLoS One"],["dc.bibliographiccitation.volume","14"],["dc.contributor.author","Salecker, Jan"],["dc.contributor.author","Dislich, Claudia"],["dc.contributor.author","Wiegand, Kerstin"],["dc.contributor.author","Meyer, Katrin M."],["dc.contributor.author","Pe Er, Guy"],["dc.date.accessioned","2020-12-08T07:41:51Z"],["dc.date.available","2020-12-08T07:41:51Z"],["dc.date.issued","2019"],["dc.description.abstract","Spatially-explicit simulation models are commonly used to study complex ecological and socio-economic research questions. Often these models depend on detailed input data, such as initial land-cover maps to set up model simulations. Here we present the landscape generator EFFortS-LGraf that provides artificially-generated land-use maps of agricultural landscapes shaped by small-scale farms. EFForTS-LGraf is a process-based landscape generator that explicitly incorporates the human dimension of land-use change. The model generates roads and villages that consist of smallholder farming households. These smallholders use different establishment strategies to create fields in their close vicinity. Crop types are distributed to these fields based on crop fractions and specialization levels. EFForTS-LGraf model parameters such as household area or field size frequency distributions can be derived from household surveys or geospatial data. This can be an advantage over the abstract parameters of neutral landscape generators. We tested the model using oil palm and rubber farming in Indonesia as a case study and validated the artificially-generated maps against classified satellite images. Our results show that EFForTS-LGraf is able to generate realistic land-cover maps with properties that lie within the boundaries of landscapes from classified satellite images. An applied simulation experiment on landscape-level effects of increasing household area and crop specialization revealed that larger households with higher specialization levels led to spatially more homogeneous and less scattered crop type distributions and reduced edge area proportion. Thus, EFForTS-LGraf can be applied both to generate maps as inputs for simulation modelling and as a stand-alone tool for specific landscape-scale analyses in the context of ecological-economic studies of smallholder farming systems."],["dc.identifier.doi","10.1371/journal.pone.0222949"],["dc.identifier.pmid","31560726"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/16510"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/69449"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["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.eissn","1932-6203"],["dc.relation.orgunit","Abteilung Ökosystemmodellierung"],["dc.relation.orgunit","Zentrum für Biodiversität und Nachhaltige Landnutzung"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.subject.gro","landscape generator"],["dc.subject.gro","agent-based model"],["dc.subject.gro","ABM"],["dc.subject.gro","NetLogo"],["dc.subject.gro","process-based"],["dc.subject.gro","Indonesia"],["dc.subject.gro","sfb990_journalarticles"],["dc.title","EFForTS-LGraf: A landscape generator for creating smallholder-driven land-use mosaics"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.seriesnr","29"],["dc.contributor.author","Salecker, Jan"],["dc.contributor.author","Dislich, Claudia"],["dc.contributor.author","Wiegand, Kerstin"],["dc.contributor.author","Meyer, Katrin M."],["dc.contributor.author","Pe’er, Guy"],["dc.date.accessioned","2022-05-19T11:18:58Z"],["dc.date.available","2022-05-19T11:18:58Z"],["dc.date.issued","2019-05"],["dc.description.abstract","Spatially-explicit simulation models are commonly used to study complex ecological and socio-economic research questions. Often these models depend on detailed input data, such as initial land-cover maps to set up model simulations. Here we present the landscape generator EFFortS- LGraf that provides artificially-generated land-use maps of agricultural landscapes shaped by small- scale farms. EFForTS-LGraf is a process-based landscape generator that explicitly incorporates the human dimension of land-use change. The model generates roads and villages that consist of smallholder farming households. These smallholders use different establishment strategies to create fields in their close vicinity. Crop types are distributed to these fields based on crop fractions and specialization levels. EFForTS-LGraf model parameters such as household area or field size frequency distributions can be derived from household surveys or geospatial data. This can be an advantage over the abstract parameters of neutral landscape generators. We tested the model using oil palm and rubber farming in Indonesia as a case study and validated the artificially-generated maps against classified satellite images. Our results show that EFForTS-LGraf is able to generate realistic land-cover maps with properties that lie within the boundaries of landscapes from classified satellite images. An applied simulation experiment on landscape-level effects of increasing household area and crop specialization revealed that larger households with higher specialization levels led to spatially more homogeneous and less scattered crop type distributions and reduced edge area proportion. Thus, EFForTS-LGraf can be applied both to generate maps as inputs for simulation modelling and as a stand-alone tool for specific landscape-scale analyses in the context of ecological-economic studies of smallholder farming systems."],["dc.format.extent","37"],["dc.identifier.ppn","1665217219"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/108110"],["dc.language.iso","en"],["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.crisseries","EFForTS Discussion Paper Series"],["dc.relation.orgunit","Johann-Friedrich-Blumenbach-Institut für Zoologie und Anthropologie"],["dc.rights","CC BY-NC-ND 4.0"],["dc.subject.gro","landscape generator; agent-based model; ABM; NetLogo; process-based; Indonesia"],["dc.subject.gro","sfb990_discussionpaperseries"],["dc.title","EFForTS-LGraf"],["dc.title.subtitle","A Landscape Generator for Creating Smallholder-Driven Land-Use Mosaics"],["dc.type","working_paper"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.contributor.author","Salecker, Jan"],["dc.contributor.author","Meyer, Katrin M."],["dc.contributor.author","Wiegand, Kerstin"],["dc.date.accessioned","2020-12-08T11:09:20Z"],["dc.date.available","2020-12-08T11:09:20Z"],["dc.date.issued","2014"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/69483"],["dc.relation.eventlocation","Hildesheim"],["dc.relation.eventstart","2014"],["dc.relation.orgunit","Abteilung Ökosystemmodellierung"],["dc.title","Black Poplar Population Persistence"],["dc.type","poster"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]