Fender, Ann-Catrin

[["dc.bibliographiccitation.firstpage","23"],["dc.bibliographiccitation.journal","Soil Biology and Biochemistry"],["dc.bibliographiccitation.lastpage","32"],["dc.bibliographiccitation.volume","61"],["dc.contributor.author","Cesarz, Simone"],["dc.contributor.author","Fender, Ann-Catrin"],["dc.contributor.author","Beyer, Friderike"],["dc.contributor.author","Valtanen, Kerttu"],["dc.contributor.author","Pfeiffer, Birgit"],["dc.contributor.author","Gansert, Dirk"],["dc.contributor.author","Hertel, Dietrich"],["dc.contributor.author","Polle, Andrea"],["dc.contributor.author","Daniel, Rolf"],["dc.contributor.author","Leuschner, Christoph"],["dc.contributor.author","Scheu, Stefan"],["dc.date.accessioned","2017-09-07T11:49:12Z"],["dc.date.available","2017-09-07T11:49:12Z"],["dc.date.issued","2013"],["dc.description.abstract","Knowledge about the influence of living roots on decomposition processes in soil is scarce but is needed to understand carbon dynamics in soil. We investigated the effect of dominant deciduous tree species of the Central European forest vegetation, European beech (Fagus sylvatica L.) and European ash (Fraxinus excelsior L.), on soil biota and carbon dynamics differentiating between root- and leaf litter-mediated effects. The influence of beech and ash seedlings on carbon and nitrogen flow was investigated using leaf litter enriched in 13C and 15N in double split-root rhizotrons planted with beech and ash seedlings as well as a mixture of both tree species and a control without plants. Stable isotope and compound-specific fatty acid analysis (13C-PLFA) were used to follow the incorporation of stable isotopes into microorganisms, soil animals and plants. Further, the bacterial community composition was analyzed using pyrosequencing of 16S rRNA gene amplicons. Although beech root biomass was significantly lower than that of ash only beech significantly decreased soil carbon and nitrogen concentrations after 475 days of incubation. In addition, beech significantly decreased microbial carbon use efficiency as indicated by higher specific respiration. Low soil pH probably increased specific respiration of bacteria suggesting that rhizodeposits of beech roots induced increased microbial respiration and therefore carbon loss from soil. Compared to beech δ13C and δ15N signatures of gamasid mites in ash rhizotrons were significantly higher indicating higher amounts of litter-derived carbon and nitrogen to reach higher trophic levels. Similar δ13C signatures of bacteria and fine roots indicate that mainly bacteria incorporated root-derived carbon in beech rhizotrons. The results suggest that beech and ash differentially impact soil processes with beech more strongly affecting the belowground system via root exudates and associated changes in rhizosphere microorganisms and carbon dynamics than ash."],["dc.identifier.doi","10.1016/j.soilbio.2013.02.003"],["dc.identifier.gro","3147219"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/4851"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.issn","0038-0717"],["dc.title","Roots from beech (Fagus sylvatica L.) and ash (Fraxinus excelsior L.) differentially affect soil microorganisms and carbon dynamics"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","14"],["dc.bibliographiccitation.journal","Forest Ecology and Management"],["dc.bibliographiccitation.lastpage","22"],["dc.bibliographiccitation.volume","302"],["dc.contributor.author","Beyer, Friderike"],["dc.contributor.author","Hertel, Dietrich"],["dc.contributor.author","Jung, Klaus"],["dc.contributor.author","Fender, Ann-Catrin"],["dc.contributor.author","Leuschner, Christoph"],["dc.date.accessioned","2018-08-13T14:57:49Z"],["dc.date.available","2018-08-13T14:57:49Z"],["dc.date.issued","2013"],["dc.description.abstract","Belowground competition has been identified as a major force structuring plant communities, but it is not well known how inter- and intraspecific root competition are influencing the survivorship of individual roots. We investigated the impact of inter- and intraspecific competition between European ash (Fraxinus excelsior) and European beech (Fagus sylvatica) on fine root survivorship, root system size and plant productivity in a competition experiment with direct fine root growth observation. Ash and beech saplings were grown either in mixture, monoculture or in isolation (single plant) in rhizoboxes with a transparent observation window that allowed quantifying root growth as well as root longevity dependent on neighbour presence. Root survival was analysed using Cox proportional hazards regression and Kaplan–Meier estimations. Standing root biomass and root productivity were quantified at a final harvest, allowing the calculation of competition indices and biomass partitioning in the plant. With competition indices indicating asymmetric competition in favour of ash, our experiment supports earlier findings on the competitive superiority of juvenile ash over beech plants. Mean root lifespan differed significantly among species (higher longevity of ash fine roots) and also in dependence of the competition treatment. The risk of fine root mortality increased when beech roots grew in mixture with ash or in beech monoculture as compared to beech plants growing in isolation. In contrast, ash fine roots had a lower mortality in mixture with beech than when grown in isolation. Our data indicate that ash fine roots apparently profit from the presence of beech roots while beech root growth and survival are negatively affected, indicating size-asymmetric belowground competition. Competition may represent an important force influencing the fine root lifespan of these tree species."],["dc.identifier.doi","10.1016/j.foreco.2013.03.020"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/15260"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.title","Competition effects on fine root survival of Fagus sylvatica and Fraxinus excelsior"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","587"],["dc.bibliographiccitation.journal","Soil Biology and Biochemistry"],["dc.bibliographiccitation.lastpage","597"],["dc.bibliographiccitation.volume","57"],["dc.contributor.author","Fender, Ann-Catrin"],["dc.contributor.author","Gansert, Dirk"],["dc.contributor.author","Jungkunst, Hermann F."],["dc.contributor.author","Fiedler, Sabine"],["dc.contributor.author","Beyer, Friderike"],["dc.contributor.author","Schützenmeister, Klaus"],["dc.contributor.author","Thiele, Björn"],["dc.contributor.author","Valtanen, Kerttu"],["dc.contributor.author","Polle, Andrea"],["dc.contributor.author","Leuschner, Christoph"],["dc.date.accessioned","2017-09-07T11:49:18Z"],["dc.date.available","2017-09-07T11:49:18Z"],["dc.date.issued","2013"],["dc.description.abstract","Through their leaf litter and throughfall water, tree species can have a pronounced influence on soil chemistry. However, there is little knowledge of species-specific root effects on greenhouse gas fluxes between forest soils and the atmosphere. By growing saplings of beech (Fagus sylvatica) and ash (Fraxinus excelsior) in monoculture or mixture at defined atmospheric and soil conditions in rhizotrons, we tested four hypotheses related to potential root-induced tree species effects on the uptake of CH4 and the emission of N2O and CO2 from the soil. This design excluded putative effects of leaf litter mineralisation on trace gas fluxes. Gas fluxes were measured biweekly using the closed chamber technique; the CO2 derived from root respiration was estimated, and the concentration of organic acids in the rhizosphere solution was analysed. Rhizotrons planted with ash took up significantly more CH4 and emitted less N2O than control rhizotrons without plants. CH4 and N2O fluxes from beech rhizotrons did not differ from the root-free control but were significantly smaller (CH4) or higher (N2O) than the fluxes from the ash treatment. While root respiration of ash was higher than of beech, root-induced soil respiration was higher in the rhizosphere of beech roots. The concentration of organic acids tended to be higher in the rhizosphere of beech and also the composition was different from that of ash. We conclude that tree species identity may substantially alter the soil source/sink strength for greenhouse gases through root-related processes."],["dc.identifier.doi","10.1016/j.soilbio.2012.08.004"],["dc.identifier.gro","3147247"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/4880"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.issn","0038-0717"],["dc.title","Root-induced tree species effects on the source/sink strength for greenhouse gases (CH4, N2O and CO2) of a temperate deciduous forest soil"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]