Flessa, Heiner

[["dc.bibliographiccitation.firstpage","25"],["dc.bibliographiccitation.issue","1-2"],["dc.bibliographiccitation.journal","Plant and Soil"],["dc.bibliographiccitation.lastpage","38"],["dc.bibliographiccitation.volume","336"],["dc.contributor.author","Guckland, Anja"],["dc.contributor.author","Corre, Marife D."],["dc.contributor.author","Flessa, Heiner"],["dc.date.accessioned","2018-11-07T08:37:48Z"],["dc.date.available","2018-11-07T08:37:48Z"],["dc.date.issued","2010"],["dc.description.abstract","The mixture of other broadleaf species into beech forests in Central Europe leads to an increase of tree species diversity, which may alter soil biochemical processes. This study was aimed at 1) assessing differences in gross rates of soil N cycling among deciduous stands of different beech (Fagus sylvatica L.) abundance in a limestone area, 2) analyzing the relationships between gross rates of soil N cycling and forest stand N cycling, and 3) quantifying N2O emission and determining its relationship with gross rates of soil N cycling. We used N-15 pool dilution techniques for soil N transformation measurement and chamber method for N2O flux measurement. Gross rates of mineral N production in the 0-5 cm mineral soil increased across stands of decreasing beech abundance and increasing soil clay content. These rates were correlated with microbial biomass which, in turn, was influenced by substrate quantity, quality and soil fertility. Leaf litter-N, C:N ratio and base saturation in the mineral soil increased with decreasing beech abundance. Soil mineral N production and assimilation by microbes were tightly coupled, resulting in low N2O emissions. Annual N2O emissions were largely contributed by the freeze-thaw event emissions, which were correlated with the amount of soil microbial biomass. Our results suggest that soil N availability may increase through the mixture of broadleaf species into beech forests."],["dc.description.sponsorship","Deutsche Forschungsgemeinschaft (DFG) [Graduiertenkolleg 1086]"],["dc.identifier.doi","10.1007/s11104-010-0437-8"],["dc.identifier.isi","000283367600004"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/7634"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/18622"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","0032-079X"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Variability of soil N cycling and N2O emission in a mixed deciduous forest with different abundance of beech"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","389"],["dc.bibliographiccitation.issue","1-2"],["dc.bibliographiccitation.journal","Plant and Soil"],["dc.bibliographiccitation.lastpage","403"],["dc.bibliographiccitation.volume","352"],["dc.contributor.author","Langenbruch, Christina"],["dc.contributor.author","Helfrich, Mirjam"],["dc.contributor.author","Flessa, Heinz"],["dc.date.accessioned","2018-11-07T09:12:42Z"],["dc.date.available","2018-11-07T09:12:42Z"],["dc.date.issued","2012"],["dc.description.abstract","Aims We aimed to determine the influence of the distribution of different broadleaved tree species on soil chemical properties in a mature deciduous forest in Central Germany. Methods Triangles of three neighboring trees (tree clusters) that consisted of either one or two species of European beech (Fagus sylvatica L.), European ash (Fraxinus excelsior L.) or lime (Tilia cordata Mill. or Tilia platyphyllos Scop.) were selected and analyzed for their litterfall chemistry and chemical properties of the forest floor and mineral soil (0-10 cm and 10-20 cm). Results Base saturation, pH-value and the stock of exchangeable Mg2+ (0-10 cm) were highest under ash and lowest under beech. The proportion of exchangeable Al3+ was smallest under ash and highest under beech. The stock of exchangeable Mg2+ and Ca2+ correlated positively with the annual input of the respective nutrient from leaf litterfall. Ash leaf litterfall contained highest amounts of Mg and Ca. Beech leaf litterfall showed the highest C:N ratio and lignin: N ratio. Soil pH, stocks of organic C, total N and exchangeable Mg2+ and Ca2+ correlated positively with increasing proportions of ash leaf litter to total leaf litterfall. Conclusions Our results indicate that the abundance of ash in beech dominated forests on loess over limestone had a positive effect on soil chemical properties and reduced soil acidification. The intermixture and distribution of ash in beech-dominated stands resulted in an increase of the horizontal and vertical diversity of the soil habitat."],["dc.description.sponsorship","Deutsche Forschungsgemeinschaft (DFG) [1086]"],["dc.identifier.doi","10.1007/s11104-011-1004-7"],["dc.identifier.isi","000302421300028"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/7543"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/27004"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","0032-079X"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Effects of beech (Fagus sylvatica), ash (Fraxinus excelsior) and lime (Tilia spec.) on soil chemical properties in a mixed deciduous forest"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","483"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","Biology and Fertility of Soils"],["dc.bibliographiccitation.lastpage","494"],["dc.bibliographiccitation.volume","47"],["dc.contributor.author","Jaeger, Nadine"],["dc.contributor.author","Stange, Claus Florian"],["dc.contributor.author","Ludwig, Bernard"],["dc.contributor.author","Flessa, Heiner"],["dc.date.accessioned","2018-11-07T08:54:37Z"],["dc.date.available","2018-11-07T08:54:37Z"],["dc.date.issued","2011"],["dc.description.abstract","Increasing organic matter stocks in soils reduce atmospheric carbon dioxide (CO2), but they may also promote emissions of nitrous oxide (N2O) by providing substrates for nitrification and denitrification and by increasing microbial O-2 consumption. The objectives of this study were to determine the effects of fertilization history, which had resulted in different soil organic matter stocks on (1) the emission rates of N2O and CO2 at a constant soil moisture content of 60% water-holding capacity, (2) the short-term fluxes of N2O and CO2 following the application of different fertilizers (KNO3 vs. farmyard manure from cattle) and (3) the response to a simulated heavy rainfall event, which increased soil moisture to field capacity. Soil samples from different treatments of three long-term fertilization experiments in Germany (Methau, Sproda and Bad Lauchstadt) were incubated in a laboratory experiment with continuous determination of N2O and CO2 emissions and a monitoring of soil mineral N. The long-term fertilization treatments included application of mineral N (Methau and Sproda), farmyard manure + mineral N (Methau and Sproda), farmyard manure deposition in excess (Bad Lauchstadt) and nil fertilization (Bad Lauchstadt). Long-term addition of farmyard manure increased the soil organic C (SOC) content by 55% at Methau (silt loam), by 17% at Sproda (sandy loam) and by 88% at Bad Lauchstadt (silt loam; extreme treatment which does not represent common agricultural management). Increased soil organic matter stocks induced by long-term application of farmyard manure at Methau and Sproda resulted in slightly increased N2O emissions at a soil moisture content of 60% water-holding capacity. However, the effect of fertilization history and SOC content on N2O emissions was small compared to the short-term effects induced by the current fertilizer application. At Bad Lauchstadt, high N2O emissions from the treatment without fertilization for 25 years indicate the importance of a sustainable soil organic matter management to maintain soil structure and soil aeration. Emissions of N2O following the application of nitrate and farmyard manure differed because of their specific effects on soil nitrate availability and microbial oxygen consumption. At a soil moisture content of 60% waterholding capacity, fertilizer-induced emissions were higher for farmyard manure than for nitrate. At field capacity, nitrate application induced the highest emissions. Our results indicate that feedback mechanisms of soil C sequestration on N2O emissions have to be considered when discussing options to increase soil C stocks."],["dc.description.sponsorship","German Research Association (Deutsche Forschungsgemeinschaft, DFG)"],["dc.identifier.doi","10.1007/s00374-011-0553-5"],["dc.identifier.isi","000292972400001"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/6608"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/22711"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","0178-2762"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Emission rates of N2O and CO2 from soils with different organic matter content from three long-term fertilization experiments-a laboratory study"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","299"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Nutrient Cycling in Agroecosystems"],["dc.bibliographiccitation.lastpage","312"],["dc.bibliographiccitation.volume","85"],["dc.contributor.author","Weymann, Daniel"],["dc.contributor.author","Well, Reinhard"],["dc.contributor.author","von der Heide, Carolin"],["dc.contributor.author","Boettcher, Juergen"],["dc.contributor.author","Flessa, Heiner"],["dc.contributor.author","Duijnisveld, Wilhelmus H. M."],["dc.date.accessioned","2018-11-07T11:23:03Z"],["dc.date.available","2018-11-07T11:23:03Z"],["dc.date.issued","2009"],["dc.description.abstract","Production and accumulation of the major greenhouse gas nitrous oxide (N2O) in surface groundwater might contribute to N2O emissions to the atmosphere. We report on a N-15 tracer study conducted in the Fuhrberger Feld aquifer in northern Germany. A (KNO3)-N-15 tracer solution (60 atom%) was applied to the surface groundwater on an 8 m(2) measuring plot using 45 injection points in order to stimulate production of (N2O)-N-15 by denitrification and to detect its contribution to emissions at the soil surface. Samples from the surface groundwater, from the unsaturated zone and at the soil surface were collected in regular intervals over a 72-days period. Total N2O fluxes at the soil surface were low and in a range between -7.6 and 29.1 mu g N2O-N m(-2) h(-1). N-15 enrichment of N2O decreased considerably upwards in the profile. In the surface groundwater, we found a N-15 enrichment of N2O between 13 and 42 atom%. In contrast, N-15 enrichment of N2O in flux chambers at the soil surface was very low, but a detectable N-15 enrichment was found at all sampling events. Fluxes of groundwater-derived N-15-N2O were very low and ranged between 0.0002 and 0.0018 kg N2O-N ha(-1) year(-1), indicating that indirect N2O emissions from the surface groundwater of the Fuhrberger Feld aquifer occurring via upward diffusion are hardly significant. Due to these observations we concluded that N2O dynamics at the soil-atmosphere interface is predominantly governed by topsoil parameters. However, highest N-15 enrichments of N2O throughout the profile were obtained in the course of a rapid drawdown of the groundwater table. We assume that such fluctuations may enhance diffusive N2O fluxes from the surface groundwater to the atmosphere for a short time."],["dc.description.sponsorship","German Research Foundation"],["dc.identifier.doi","10.1007/s10705-009-9269-4"],["dc.identifier.isi","000270649300008"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/6796"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/56106"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","1385-1314"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Recovery of groundwater N2O at the soil surface and its contribution to total N2O emissions"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1953"],["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","BIOGEOSCIENCES"],["dc.bibliographiccitation.lastpage","1972"],["dc.bibliographiccitation.volume","7"],["dc.contributor.author","Weymann, Daniel"],["dc.contributor.author","Geistlinger, H."],["dc.contributor.author","Well, Reinhard"],["dc.contributor.author","von der Heide, Carolin"],["dc.contributor.author","Flessa, H."],["dc.date.accessioned","2018-11-07T08:47:08Z"],["dc.date.available","2018-11-07T08:47:08Z"],["dc.date.issued","2010"],["dc.description.abstract","Knowledge of the kinetics of N2O production and reduction in groundwater is essential for the assessment of potential indirect emissions of the greenhouse gas. In the present study, we investigated this kinetics using a laboratory approach. The results were compared to field measurements in order to examine their transferability to the in situ conditions. The study site was the unconfined, predominantly sandy Fuhrberger Feld aquifer in northern Germany. A special characteristic of the aquifer is the occurrence of the vertically separated process zones of heterotrophic denitrification in the near-surface groundwater and of autotrophic denitrification in depths beyond 2-3 m below the groundwater table, respectively. The kinetics of N2O production and reduction in both process zones was studied during long-term anaerobic laboratory incubations of aquifer slurries using the N-15 tracer technique. We measured N2O, N-2, NO3-, NO2-, and SO42- concentrations as well as parameters of the aquifer material that were related to the relevant electron donors, i.e. organic carbon and pyrite. The laboratory incubations showed a low denitrification activity of heterotrophic denitrification with initial rates between 0.2 and 13 mu g N kg(-1) d(-1). The process was carbon limited due to the poor availability of its electron donor. In the autotrophic denitrification zone, initial denitrification rates were considerably higher, ranging between 30 and 148 mu g N kg(-1) d(-1), and NO3- as well as N2O were completely removed within 60 to 198 days. N2O accumulated during heterotrophic and autotrophic denitrification, but maximum concentrations were substantially higher during the autotrophic process. The results revealed a satisfactory transferability of the laboratory incubations to the field scale for autotrophic denitrification, whereas the heterotrophic process less reflected the field conditions due to considerably lower N2O accumulation during laboratory incubation. Finally, we applied a conventional model using first-order-kinetics to determine the reaction rate constants k(1) for N2O production and k(2) for N2O reduction, respectively. The goodness of fit to the experimental data was partly limited, indicating that a more sophisticated approach is essential to describe the investigated reaction kinetics satisfactorily."],["dc.description.sponsorship","German Research Foundation (DFG)"],["dc.identifier.doi","10.5194/bg-7-1953-2010"],["dc.identifier.isi","000279390700009"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/5734"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/20872"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Copernicus Gesellschaft Mbh"],["dc.relation.issn","1726-4170"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Kinetics of N2O production and reduction in a nitrate-contaminated aquifer inferred from laboratory incubation experiments"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1215"],["dc.bibliographiccitation.journal","Biogeosciences"],["dc.bibliographiccitation.lastpage","1226"],["dc.bibliographiccitation.volume","5"],["dc.contributor.author","Weymann, D."],["dc.contributor.author","Well, R."],["dc.contributor.author","Flessa, H."],["dc.contributor.author","Heide, C. von der"],["dc.contributor.author","Deurer, M."],["dc.contributor.author","Meyer, K."],["dc.contributor.author","Konrad, C."],["dc.contributor.author","Walther, W."],["dc.date.accessioned","2019-07-10T08:13:59Z"],["dc.date.available","2019-07-10T08:13:59Z"],["dc.date.issued","2008"],["dc.description.abstract","We investigated the dynamics of denitrification and nitrous oxide (N2O) accumulation in 4 nitrate (NO-3) contaminated denitrifying sand and gravel aquifers of northern Germany (Fuhrberg, Sulingen, Thülsfelde and Göttingen) to quantify their potential N2O emission and to evaluate existing concepts of N2O emission factors. Excess N2 – N2 produced by denitrification – was determined by using the argon (Ar) concentration in groundwater as a natural inert tracer, assuming that this noble gas functions as a stable component and does not change during denitrification. Furthermore, initial NO− 3 concentrations (NO− 3 that enters the groundwater) were derived from excess N2 and actual NO− 3 concentrations in groundwater in order to determine potential indirect N2O emissions as a function of the N input. Median concentrations of N2O and excess N2 ranged from 3 to 89μgNL−1 and from 3 to 10 mgNL−1, respectively. Reaction progress (RP) of denitrification was determined as the ratio between products (N2O-N + excess N2) and starting material (initial NO− 3 concentration) of the process, characterizing the different stages of denitrification. N2O concentrations were lowest at RP close to 0 and RP close to 1 but relatively high at a RP between 0.2 and 0.6. For the first time, we report groundwater N2O emission factors consisting of the ratio between N2O-N and initial NO− 3 -N concentrations (EF1). In addition, we determined a groundwater emission factor (EF2) using a previous concept consisting of the ratio between N2O-N and actual NO− 3 -N concentrations. Depending on RP, EF(1) resulted in smaller values compared to EF(2), demonstrating (i) the relevance of NO− 3 consumption and consequently (ii) the need to take initial NO− 3 -N concentrations into account. In general, both evaluated emission factors were highly variable within and among the aquifers. The site medians ranged between 0.00043– 0.00438 for EF(1) and 0.00092–0.01801 for EF(2), respectively. For the aquifers of Fuhrberg and Sulingen, we found EF(1) median values which are close to the 2006 IPCC default value of 0.0025. In contrast, we determined significant lower EF values for the aquifers of Thülsfelde and Göttingen. Summing the results up, our study supports the substantial downward revision of the IPCC default EF5-g from 0.015 (1997) to 0.0025 (2006)."],["dc.identifier.fs","457062"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/8421"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/61399"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.relation.issn","1726-4170"],["dc.relation.orgunit","Fakultät für Forstwissenschaften und Waldökologie"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.subject.ddc","570"],["dc.title","Groundwater N2O emission factors of nitrate-contaminated aquifers as derived from denitrification progress and N2O accumulation"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","57"],["dc.bibliographiccitation.journal","Agriculture, Ecosystems & Environment"],["dc.bibliographiccitation.lastpage","69"],["dc.bibliographiccitation.volume","249"],["dc.contributor.author","Ruser, Reiner"],["dc.contributor.author","Fuß, Roland"],["dc.contributor.author","Andres, Monique"],["dc.contributor.author","Hegewald, Hannes"],["dc.contributor.author","Kesenheimer, Katharina"],["dc.contributor.author","Köbke, Sarah"],["dc.contributor.author","Räbiger, Thomas"],["dc.contributor.author","Quinones, Teresa Suarez"],["dc.contributor.author","Augustin, Jürgen"],["dc.contributor.author","Christen, Olaf"],["dc.contributor.author","Dittert, Klaus"],["dc.contributor.author","Kage, Henning"],["dc.contributor.author","Lewandowski, Iris"],["dc.contributor.author","Prochnow, Annette"],["dc.contributor.author","Stichnothe, Heinz"],["dc.contributor.author","Flessa, Heinz"],["dc.date.accessioned","2019-07-09T11:44:51Z"],["dc.date.available","2019-07-09T11:44:51Z"],["dc.date.issued","2017"],["dc.description.abstract","Winter oilseed rape (Brassica napus L., WOSR) is the major oil crop cultivated in Europe. Rapeseed oil is predominantly used for production of biodiesel. The framework of the European Renewable Energy Directive requires that use of biofuels achieves GHG savings of at least 50% compared to use of fossil fuel starting in 2018. However, N2O field emissions are estimated using emission factors that are not specific for the crop and associated with strong uncertainty. N2O field emissions are controlled by N fertilization and dominate the GHG balance of WOSR cropping due to the high global warming potential of N2O. Thus, field experiments were conducted to increase the data basis and subsequently derive a new WOSR-specific emission factor. N2O emissions and crop yields were monitored for three years over a range of N fertilization intensities at five study sites representative of German WOSR production. N2O fluxes exhibited the typical high spatial and temporal variability in dependence on soil texture, weather and nitrogen availability. The annual N2O emissions ranged between 0.24 kg and 5.48 kg N2O-N ha−1 a−1. N fertilization increased N2O emissions, particularly with the highest N treatment (240 kg N ha−1). Oil yield increased up to a fertilizer amount of 120 kg N ha−1, higher N-doses increased grain yield but decreased oil concentrations in the seeds. Consequently oil yield remained constant at higher N fertilization. Since, yield-related emission also increased exponentially with N surpluses, there is potential for reduction of the N fertilizer rate, which offers perspectives for the mitigation of GHG emissions. Our measurements double the published data basis of annual N2O flux measurements in WOSR. Based on this extended dataset we modeled the relationship between N2O emissions and fertilizer N input using an exponential model. The corresponding new N2O emission factor was 0.6% of applied fertilizer N for a common N fertilizer amount under best management practice in WOSR production (200 kg N ha−1 a−1). This factor is substantially lower than the linear IPCC Tier 1 factor (EF1) of 1.0% and other models that have been proposed."],["dc.identifier.doi","10.1016/j.agee.2017.07.039"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/14925"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/59111"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.relation.issn","0167-8809"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0/"],["dc.subject.ddc","630"],["dc.title","Nitrous oxide emissions from winter oilseed rape cultivation"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","469"],["dc.bibliographiccitation.issue","1-3"],["dc.bibliographiccitation.journal","Biogeochemistry"],["dc.bibliographiccitation.lastpage","483"],["dc.bibliographiccitation.volume","111"],["dc.contributor.author","Wolf, Katrin"],["dc.contributor.author","Flessa, Heiner"],["dc.contributor.author","Veldkamp, Edzo"],["dc.date.accessioned","2017-09-07T11:43:38Z"],["dc.date.available","2017-09-07T11:43:38Z"],["dc.date.issued","2011"],["dc.identifier.doi","10.1007/s10533-011-9681-0"],["dc.identifier.gro","3150182"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/8839"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6918"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.relation.issn","0168-2563"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Atmospheric methane uptake by tropical montane forest soils and the contribution of organic layers"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","247"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Biogeochemistry"],["dc.bibliographiccitation.lastpage","263"],["dc.bibliographiccitation.volume","87"],["dc.contributor.author","Paul, Sonja"],["dc.contributor.author","Flessa, Heiner"],["dc.contributor.author","Veldkamp, Edzo"],["dc.contributor.author","López-Ulloa, Magdalena"],["dc.date.accessioned","2017-09-07T11:43:37Z"],["dc.date.available","2017-09-07T11:43:37Z"],["dc.date.issued","2008"],["dc.description.abstract","Quantitative knowledge of stabilization- and decomposition processes is necessary to understand, assess and predict effects of land use changes on storage and stability of soil organic carbon (soil C) in the tropics. Although it is well documented that different soil types have different soil C stocks, it is presently unknown how different soil types affect the stability of recently formed soil C. Here, we analyze the main controls of soil C storage in the top 0.1 m of soils developed on Tertiary sediments and soils developed on volcanic ashes. Using a combination of fractionation techniques with 13C isotopes analyses we had the opportunity to trace origin and stability of soil carbon in different aggregate fractions under pasture and secondary forest. Soil C contents were higher in volcanic ash soils (47–130 g kg−1) than in sedimentary soils (19–50 g kg−1). Mean residence time (MRT) of forest-derived carbon in pastures increased from 37 to 57 years with increasing silt + clay content in sedimentary soils, but was independent from soil properties in volcanic ash soils. MRTs of pasture-derived carbon in secondary forests were considerably shorter, especially in volcanic ash soils, where no pasture-derived carbon could be detected in any of the four studied secondary forests. The implications of these results are that the MRT of recently incorporated organic carbon depends on clay mineralogy and is longer in soils dominated by smectite than non-crystalline minerals. Our results show that the presence of soil C stabilization processes, does not necessarily mean that recent incorporated soil C will also be effectively stabilized."],["dc.identifier.doi","10.1007/s10533-008-9182-y"],["dc.identifier.gro","3150189"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/4347"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6926"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","public"],["dc.relation.issn","0168-2563"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.subject","Carbon sequestration; Ecuador; Mean residence time; Pasture; Secondary forest; Soil type; Texture; Water-stable aggregates"],["dc.title","Stabilization of recent soil carbon in the humid tropics following land use changes: evidence from aggregate fractionation and stable isotope analyses"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]