De Koning, G. H. J.

[["dc.bibliographiccitation.artnumber","1110"],["dc.bibliographiccitation.firstpage","1110"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Soil Science Society of America Journal"],["dc.bibliographiccitation.lastpage","1117"],["dc.bibliographiccitation.volume","69"],["dc.contributor.author","López-Ulloa, M."],["dc.contributor.author","Veldkamp, Edzo"],["dc.contributor.author","Koning, G. H. J. de"],["dc.date.accessioned","2017-09-07T11:54:56Z"],["dc.date.available","2017-09-07T11:54:56Z"],["dc.date.issued","2005"],["dc.description.abstract","The influence of soil C stabilization mechanisms is normally not considered in studies on the effects of land use changes. Instead, observed changes are typically explained by differences in litter input. As a result, it is not well known if and how quickly newly incorporated C is stabilized in soils. Our goals were to find out how much soil C was stabilized in two different soil orders (Andisols and Inceptisols) and which are the responsible mechanisms of C stabilization. Furthermore, we looked for evidence that newly incorporated soil C was stabilized in these contrasting soil orders. We selected 25 sites in northwestern Ecuador with two paired plots per site: one plot where pasture was converted to secondary forest and one plot where forest was converted to pasture. In all the plots, soil C content, stocks, and stable isotope (δ13C) signal were measured in the surface soil. The δ13C values were used to estimate the stocks of soil C derived from forest (Cdf) and from pasture (Cdp) in all plots. We calculated correlations between these stocks and soil and environmental characteristics to identify mechanisms of soil C stabilization. Our results show that long-term stabilization in Andisols was through formation of metal–humus complexes and allophane, while in Inceptisols long-term stabilization was through sorption to clay minerals. We found evidence that recently incorporated C was not stabilized in Andisols, while in Inceptisols, poorly crystalline (hydr-) oxides seemed to have stabilized part of this soil C. We conclude that unless soil C stabilizing mechanisms are explicitly considered, we will not be able to predict the direction and magnitude of changes in soil C stocks following land use changes in the tropics."],["dc.identifier.doi","10.2136/sssaj2004.0353"],["dc.identifier.gro","3150162"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6895"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.relation.issn","1435-0661"],["dc.title","Soil Carbon Stabilization in Converted Tropical Pastures and Forests Depends on Soil Type"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","472"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","The American Journal of Human Genetics"],["dc.bibliographiccitation.lastpage","481"],["dc.bibliographiccitation.volume","74"],["dc.contributor.author","Schwarz, M."],["dc.contributor.author","Thiel, C."],["dc.contributor.author","Lubbehusen, J."],["dc.contributor.author","Dorland, B."],["dc.contributor.author","de Koning, T."],["dc.contributor.author","von Figura, Kurt"],["dc.contributor.author","Lehle, L."],["dc.contributor.author","Korner, C."],["dc.date.accessioned","2018-11-07T10:50:25Z"],["dc.date.available","2018-11-07T10:50:25Z"],["dc.date.issued","2004"],["dc.description.abstract","The molecular nature of a severe multisystemic disorder with a recurrent nonimmune hydrops fetalis was identified as deficiency of GDP-Man: GlcNAc(2)-PP-dolichol mannosyltransferase, the human orthologue of the yeast ALG1 gene (MIM 605907). The disease belongs to the group of congenital disorders of glycosylation (CDG) and is designated as subtype CDG-Ik. In patient-derived serum, the total amount of the glycoprotein transferrin was reduced. Moreover, a partial loss of N-glycan chains was observed, a characteristic feature of CDG type I forms. Metabolic labeling with [6-H-3] glucosamine revealed an accumulation of GlcNAc(2)-PP-dolichol and GlcNAc(1)-PP-dolichol in skin fibroblasts of the patient. Incubation of fibroblast extracts with [C-14] GlcNAc(2)-PP-dolichol and GDP-mannose indicated a severely reduced activity of the beta1,4- mannosyltransferase, elongating GlcNAc(2)-PP-dol-ichol to Man1 GlcNAc(2)-PP-dolichol at the cytosolic side of the endoplasmic reticulum. Genetic analysis of the patient's hALG1 gene identified a homozygous mutation leading to the exchange of a serine residue to leucine at position 258 in the hALG1 protein. The disease-causing nature of the hALG1 mutation for the glycosylation defect was verified by a retroviral complementation approach in patient-derived primary fibroblasts and was confirmed by the expression of wild-type and mutant hALG1 in the Saccharomyces cerevisiae alg1-1 strain."],["dc.identifier.doi","10.1086/382492"],["dc.identifier.isi","000220118500014"],["dc.identifier.pmid","14973778"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/48645"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Univ Chicago Press"],["dc.relation.issn","0002-9297"],["dc.title","Deficiency of GDP-Man : GlcNAc(2)-PP-dolichol mannosyltransferase causes congenital disorder of glycosylation type Ik"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","59"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Diversity and Distributions"],["dc.bibliographiccitation.lastpage","68"],["dc.bibliographiccitation.volume","14"],["dc.contributor.author","Lozada, Tannya"],["dc.contributor.author","Koning, G. H. J. de"],["dc.contributor.author","Kessler, Michael"],["dc.contributor.author","Klein, Alexandra-Maria"],["dc.contributor.author","Tscharntke, Teja"],["dc.date.accessioned","2017-09-07T11:49:58Z"],["dc.date.available","2017-09-07T11:49:58Z"],["dc.date.issued","2009"],["dc.description.abstract","Biodiversity patterns may be influenced by the species geographical range sizes, but this is rarely shown. We used a highly replicated and large-scale study in coastal Ecuador to determine for the first time the importance of latitudinal range size of plant species in their response to land-use activities. We examined herbaceous plant communities of five land-use types with decreasing anthropogenic disturbance (from the most intervened rice and pasture to the less intervened managed agroforest, abandoned agroforest, and forest) in a low and a high impact human-dominated landscape. All species were classified in four latitudinal range size quartiles, from the 25% species with the narrowest to the 25% with the widest range size. We found notable differences between patterns of total species richness and those of individual range size quartiles. Whereas total species richness was higher in more intervened land-use types, percentages of narrow-ranged species were significantly higher in less intervened land-use types. In contrast, percentages of wide-ranging species were higher in more intervened land-use types. Hence, responses of plant species to human activities were influenced by traits that determine their range sizes. An analysis of floristic similarity between land-use types revealed that narrow-ranged species were mainly preserved in forest fragments, but the other land-use types supported many unique narrow-ranged species and therefore made an important contribution to their preservation at the landscape level. Conservation efforts should combine protection of natural habitats with strategies to maintain a diversity of low-intensity land-use types, looking for win-win solutions or trade-offs between biodiversity conservation and human welfare in human-dominated landscapes."],["dc.identifier.doi","10.1111/j.1472-4642.2007.00413.x"],["dc.identifier.gro","3149798"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6496"],["dc.language.iso","en"],["dc.notes.status","public"],["dc.relation.issn","1366-9516"],["dc.subject","Chocó biogeographical region; disturbance; biodiversity; land-use management; endemism; Ecuador"],["dc.title","Geographical range size of tropical plants influences their response to anthropogenic activities"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","131"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Perspectives in Plant Ecology, Evolution and Systematics"],["dc.bibliographiccitation.lastpage","140"],["dc.bibliographiccitation.volume","8"],["dc.contributor.author","Lozada, Tannya"],["dc.contributor.author","Koning, G. H. J. de"],["dc.contributor.author","Marché, Raphael"],["dc.contributor.author","Klein, Alexandra-Maria"],["dc.contributor.author","Tscharntke, Teja"],["dc.date.accessioned","2017-09-07T11:53:53Z"],["dc.date.available","2017-09-07T11:53:53Z"],["dc.date.issued","2007"],["dc.description.abstract","We used a highly replicated study to examine vegetation characteristics between patches of intervened forest, abandoned agroforestry systems with coffee and actively managed agroforestry systems with coffee in a tropical landscape. In all habitats, plant structural characteristics, individual abundance, species richness and composition were recorded for the three plant size classes: adult trees, saplings and seedlings. Furthermore, bird species richness and composition, and seeds dispersed by birds were recorded. Tree abundance was higher in forest habitats while saplings and seedlings were more abundant in abandoned coffee sites. Although species richness of adult trees was similar in the three habitats, species richness of saplings and seedlings was much higher in forest and abandoned coffee than in managed coffee sites. However, in spite of their relatively low species richness, managed coffee sites are an important refuge for tree species common to the almost disappeared mature forest in the area. Floristic similarity for adult trees was relatively low between land use types, but clearly higher for seedlings, indicating homogenizing processes at the landscape level. More than half of the saplings and seedling were not represented by adults in the canopy layer, suggesting the importance of seed dispersal by birds between habitats. Our results show that each of the studied ecosystems plays a unique and complementary role as seed source and as habitat for tree recovery and tree diversity."],["dc.identifier.doi","10.1016/j.ppees.2006.10.001"],["dc.identifier.gro","3150007"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6727"],["dc.language.iso","en"],["dc.notes.status","public"],["dc.relation.issn","1433-8319"],["dc.subject","Agroforestry systems; Coffee plantation; Intervened forest; Species richness; Structural characteristics; Tropical landscape"],["dc.title","Tree recovery and seed dispersal by birds: Comparing forest, agroforestry and abandoned agroforestry in coastal Ecuador"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","255"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Landscape and Urban Planning"],["dc.bibliographiccitation.lastpage","267"],["dc.bibliographiccitation.volume","83"],["dc.contributor.author","de Koning, G. H. J."],["dc.contributor.author","Benitez, Pablo C."],["dc.contributor.author","Munoz, Fernando"],["dc.contributor.author","Olschewski, Roland"],["dc.date.accessioned","2018-11-07T10:45:29Z"],["dc.date.available","2018-11-07T10:45:29Z"],["dc.date.issued","2007"],["dc.description.abstract","We present a land-use allocation model that evaluates the impact of payments for ecosystem services such as biodiversity conservation on land-use patterns. In a non-linear optimisation procedure, land use is allocated at farm level, taking into account risk behaviour, and spatial as well as temporal variability of net revenues of land-use alternatives, using a spatial resolution of 29 m x 29 m. The model is applied to a study area of 30 km x 34 km in western Ecuador, considered a hotspot for biodiversity. In this coffee growing region, agroforestry systems with shade-coffee are important for biodiversity conservation at the landscape level, but under pressure due to low revenues. Through scenario analyses, we analyse the effects of price premiums per kg, payments per ha, and price buffering for coffee, as well as incentives leading to coffee yield increases, and payments per ha of forest remnants. We compare different risk aversion levels of the involved agents. We conclude that payments per ha are more efficient to maintain or increase coffee areas than payments per kg. Price buffering may be the most cost-effective way to support coffee production, especially at high-risk aversion levels. Significant yield increases are necessary to make coffee more attractive compared to the other alternatives. Relatively low payments per ha of forest can significantly increase forested land. Risk behaviour turns out to be an important factor when determining the possible effect of payments for ecosystem services. We conclude that the model is a versatile tool to support planning of payments for conserving ecosystems. (c) 2007 Elsevier B.V. All rights reserved."],["dc.identifier.doi","10.1016/j.landurbplan.2007.04.010"],["dc.identifier.isi","000251928300004"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/47513"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Science Bv"],["dc.relation.issn","0169-2046"],["dc.title","Modelling the impacts of payments for biodiversity conservation on regional land-use patterns"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","77"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Journal of Forest Economics"],["dc.bibliographiccitation.lastpage","94"],["dc.bibliographiccitation.volume","11"],["dc.contributor.author","Olschewski, Roland"],["dc.contributor.author","Benitez, Pablo C."],["dc.contributor.author","de Koning, GHJ"],["dc.contributor.author","Schlichter, T."],["dc.date.accessioned","2018-11-07T08:41:53Z"],["dc.date.available","2018-11-07T08:41:53Z"],["dc.date.issued","2005"],["dc.description.abstract","The Clean Development Mechanism includes afforestation projects as possible instruments to reduce global atmospheric CO2. These projects have also the potential to combat regional environmental problems like land degradation and desertification. The present article analyzes forestry projects in north-western Patagonia from an economic viewpoint based on the latest Kyoto Protocol developments. We consider temporary and long-term Certified Emission Reductions (CER) and determine the conditions on which forest plantations are attractive to potential CER suppliers and demanders. We conclude that for most of the recent carbon price projections, carbon sink projects would be economically viable for CER suppliers and at the same time attractive to CER demanders looking for cost-efficient emission abatement opportunities. (c) 2005 Elsevier GmbH. All rights reserved."],["dc.identifier.doi","10.1016/j.jfe.2005.04.001"],["dc.identifier.isi","000233639900002"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/19569"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Gmbh, Urban & Fischer Verlag"],["dc.relation.issn","1104-6899"],["dc.title","How attractive are forest carbon sinks? Economic insights into supply and demand of Certified Emission Reductions"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Global Biogeochemical Cycles"],["dc.bibliographiccitation.volume","17"],["dc.contributor.author","Koning, G. H. J. de"],["dc.contributor.author","Veldkamp, Edzo"],["dc.contributor.author","López-Ulloa, M."],["dc.date.accessioned","2017-09-07T11:43:33Z"],["dc.date.available","2017-09-07T11:43:33Z"],["dc.date.issued","2003"],["dc.format.extent","12"],["dc.identifier.doi","10.1029/2003gb002099"],["dc.identifier.gro","3150175"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6911"],["dc.language.iso","en"],["dc.notes.status","zu prüfen"],["dc.relation.issn","0886-6236"],["dc.title","Quantification of carbon sequestration in soils following pasture to forest conversion in northwestern Ecuador"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","257"],["dc.bibliographiccitation.issue","2-3"],["dc.bibliographiccitation.journal","Ecological Modelling"],["dc.bibliographiccitation.lastpage","270"],["dc.bibliographiccitation.volume","164"],["dc.contributor.author","Overmars, K. P."],["dc.contributor.author","de Koning, GHJ"],["dc.contributor.author","Veldkamp, A."],["dc.date.accessioned","2018-11-07T10:38:15Z"],["dc.date.available","2018-11-07T10:38:15Z"],["dc.date.issued","2003"],["dc.description.abstract","In several land use models statistical methods are being used to analyse spatial data. Land use drivers that best describe land use patterns quantitatively are often selected through (logistic) regression analysis. A problem using conventional statistical methods, like (logistic) regression, in spatial land use analysis is that these methods assume the data to be statistically independent. But, spatial land use data have the tendency to be dependent, a phenomenon known as spatial autocorrelation. Values over distance are more similar or less similar than expected for randomly associated pairs of observations. In this paper correlograms of the Moran's I are used to describe spatial autocorrelation for a data set of Ecuador. Positive spatial autocorrelation was detected in both dependent and independent variables, and it is shown that the occurrence of spatial autocorrelation is highly dependent on the aggregation level. The residuals of the original regression model also show positive autocorrelation, which indicates that the standard multiple linear regression model cannot capture all spatial dependency in the land use data. To overcome this, mixed regressive-spatial autoregressive models, which incorporate both regression and spatial autocorrelation, were constructed. These models yield residuals without spatial autocorrelation and have a better goodness-of-fit. The mixed regressive-spatial autoregressive model is statistically sound in the presence of spatially dependent data, in contrast with the standard linear model which is not. By using spatial models a part of the variance is explained by neighbouring values. This is a way to incorporate spatial interactions that cannot be captured by the independent variables. These interactions are caused by unknown spatial processes such as social relations and market effects. (C) 2003 Elsevier Science B.V. All rights reserved."],["dc.identifier.doi","10.1016/S0304-3800(03)00070-X"],["dc.identifier.isi","000183394200011"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/45769"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Science Bv"],["dc.relation.issn","0304-3800"],["dc.title","Spatial autocorrelation in multi-scale land use models"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","520"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Biotropica"],["dc.bibliographiccitation.lastpage","529"],["dc.bibliographiccitation.volume","41"],["dc.contributor.author","Haro-Carrion, Xavier"],["dc.contributor.author","Lozada, Tannya"],["dc.contributor.author","Navarrete, Hugo"],["dc.contributor.author","de Koning, G. H. J."],["dc.date.accessioned","2018-11-07T08:28:01Z"],["dc.date.available","2018-11-07T08:28:01Z"],["dc.date.issued","2009"],["dc.description.abstract","To assess the contributions of rustic shade cacao plantations to vascular epiphyte conservation, we compared epiphyte species richness, abundance, composition, and vertical distributions on shade trees and in the understories of six plantations and adjacent natural forests. On three phorophytes and three 10 x 10 m understory plots in each of the agroforestry plantations and natural forests, 54 and 77 species were observed, respectively. Individual-based rarefaction curves revealed that epiphyte species richness was significantly higher on forest phorophytes than on cacao farm shade trees; detailed analyses showed that the differences were confined to the inner and outer crown zones of the phorophytes. No differences in epiphyte species richness were found in understories. Araceae, Piperaceae, and Pteridophyta were less species-rich in plantations than in forests, while there were no differences in Orchidaceae and Bromeliaceae. Regression analysis revealed that epiphyte species richness on trunks varied with canopy cover, while abundance was more closely related to soil pH, canopy cover, and phorophyte height. For crown epiphytes, phorophyte diameter at breast height (dbh) explained much of the variation in species richness and abundance. There were also pronounced downward shifts in the vertical distributions of epiphyte species in agroforests relative to natural forests. The results confirm that epiphyte diversity, composition, and vertical distributions are useful indicators of human disturbance and showed that while the studied plantations serve to preserve portions of epiphyte diversity in the landscape, their presence does not fully compensate for the loss of forests."],["dc.description.sponsorship","Federal Ministry of Education and Research (BMBF), Germany"],["dc.identifier.doi","10.1111/j.1744-7429.2009.00510.x"],["dc.identifier.isi","000267538200016"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/16326"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Wiley-blackwell Publishing, Inc"],["dc.relation.issn","0006-3606"],["dc.title","Conservation of Vascular Epiphyte Diversity in Shade Cacao Plantations in the Choco Region of Ecuador"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]