Scheu, Stefan

[["dc.bibliographiccitation.firstpage","1135"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Oecologia"],["dc.bibliographiccitation.lastpage","1145"],["dc.bibliographiccitation.volume","179"],["dc.contributor.author","Scheunemann, Nicole"],["dc.contributor.author","Digel, Christoph"],["dc.contributor.author","Scheu, Stefan"],["dc.contributor.author","Butenschoen, Olaf"],["dc.date.accessioned","2018-11-07T09:48:42Z"],["dc.date.available","2018-11-07T09:48:42Z"],["dc.date.issued","2015"],["dc.description.abstract","Soil food webs are driven by plant-derived carbon (C) entering the soil belowground as rhizodeposits or aboveground via leaf litter, with recent research pointing to a higher importance of the former for driving forest soil food webs. Using natural abundance stable isotopes of wheat (C3 plant) and maize (C4 plant), we followed and quantified the incorporation of shoot residue- and root-derived maize C into the soil animal food web of an arable field for 1 year, thereby disentangling the importance of shoot residue- versus root-derived resources for arable soil food webs. On average, shoot residue-derived resources only contributed less than 12 % to soil arthropod body C, while incorporation of root-derived resources averaged 26 % after 2 months of maize crop and increased to 32 % after 1 year. However, incorporation of root-derived maize C did not consistently increase with time: rather, it increased, decreased or remained constant depending on species. Further, preference of shoot residue- or root-derived resources was also species-specific with about half the species incorporating mainly root-derived C, while only a few species preferentially incorporated shoot residue-derived C, and about 40 % incorporated both shoot residue- as well as root-derived C. The results highlight the predominant importance of root-derived resources for arable soil food webs and suggest that shoot residues only form an additional resource of minor importance. Variation in the use of plant-derived C between soil arthropod species suggests that the flux of C through soil food webs of arable systems can only be disentangled by adopting a species-specific approach."],["dc.identifier.doi","10.1007/s00442-015-3415-2"],["dc.identifier.isi","000364226900019"],["dc.identifier.pmid","26267404"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/35359"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","1432-1939"],["dc.relation.issn","0029-8549"],["dc.title","Roots rather than shoot residues drive soil arthropod communities of arable fields"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1212"],["dc.bibliographiccitation.issue","10"],["dc.bibliographiccitation.journal","Oikos"],["dc.bibliographiccitation.lastpage","1223"],["dc.bibliographiccitation.volume","123"],["dc.contributor.author","Ott, David"],["dc.contributor.author","Digel, Christoph"],["dc.contributor.author","Klarner, Bernhard"],["dc.contributor.author","Maraun, Mark"],["dc.contributor.author","Pollierer, Melanie M."],["dc.contributor.author","Rall, Bjoern Christian"],["dc.contributor.author","Scheu, Stefan"],["dc.contributor.author","Seelig, Gesine"],["dc.contributor.author","Brose, Ulrich"],["dc.date.accessioned","2018-11-07T09:34:38Z"],["dc.date.available","2018-11-07T09:34:38Z"],["dc.date.issued","2014"],["dc.description.abstract","To maintain constant chemical composition, i.e. elemental homeostasis, organisms have to consume resources of sufficient quality to meet their own specific stoichiometric demand. Therefore, concentrations of elements indicate resource quality, and rare elements in the environment may act as limiting factors for individual organisms scaling up to constrain population densities. We investigated how the biomass densities of invertebrate populations of temperate forest soil communities depend on 1) the stoichiometry of the basal litter according to ecological stoichiometry concepts and 2) the population average body mass as predicted by metabolic theory. We used a large data set on biomass densities of 4959 populations across 48 forests in three regions of Germany. Following various ecological stoichiometry hypotheses, we tested for effects of the carbon-to-element ratios of 10 elements. Additionally, we included the abiotic litter characteristics habitat size (represented by litter depth), litter diversity and pH, as well as forest type as an indicator for human management. Across 12 species groups, we found that the biomass densities scaled significantly with population-averaged body masses thus supporting metabolic theory. Additionally, 10 of these allometric scaling relationships exhibited interactions with stoichiometric and abiotic co-variables. The four most frequent co-variables were 1) forest type, 2) the carbon-to-phosphorus ratio (C:P), 3) the carbon-to-sodium ratio (C:Na), and the carbon-to-nitrogen ratio (C:N). Hence, our analyses support the sodium shortage hypothesis for microbi-detritivores, the structural elements hypothesis for some predator groups (concerning N), and the secondary productivity hypothesis (concerning P) across all trophic groups in our data. In contrast, the ecosystem size hypothesis was only supported for some meso- and macrofauna detritivores. Our study is thus providing a comprehensive analysis how the elemental stoichiometry of the litter as the basal resource constrain population densities across multiple trophic levels of soil communities."],["dc.description.sponsorship","DFG [1374, BR 2315/7-2]"],["dc.identifier.doi","10.1111/oik.01670"],["dc.identifier.isi","000342754100007"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/32214"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Wiley-blackwell"],["dc.relation.issn","1600-0706"],["dc.relation.issn","0030-1299"],["dc.title","Litter elemental stoichiometry and biomass densities of forest soil invertebrates"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.journal","Ecology Letters"],["dc.contributor.author","Bauer, Barbara"],["dc.contributor.author","Berti, Emilio"],["dc.contributor.author","Ryser, Remo"],["dc.contributor.author","Gauzens, Benoit"],["dc.contributor.author","Hirt, Myriam R."],["dc.contributor.author","Rosenbaum, Benjamin"],["dc.contributor.author","Digel, Christoph"],["dc.contributor.author","Ott, David"],["dc.contributor.author","Scheu, Stefan"],["dc.contributor.author","Brose, Ulrich"],["dc.contributor.editor","Lafferty, Kevin"],["dc.date.accessioned","2022-04-01T10:03:27Z"],["dc.date.available","2022-04-01T10:03:27Z"],["dc.date.issued","2022"],["dc.identifier.doi","10.1111/ele.13995"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/106171"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-530"],["dc.relation.eissn","1461-0248"],["dc.relation.issn","1461-023X"],["dc.title","Biotic filtering by species’ interactions constrains food‐web variability across spatial and abiotic gradients"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1247"],["dc.bibliographiccitation.issue","10"],["dc.bibliographiccitation.journal","Ecology Letters"],["dc.bibliographiccitation.lastpage","1256"],["dc.bibliographiccitation.volume","17"],["dc.contributor.author","Ott, David"],["dc.contributor.author","Digel, Christoph"],["dc.contributor.author","Rall, Bjoern Christian"],["dc.contributor.author","Maraun, Mark"],["dc.contributor.author","Scheu, Stefan"],["dc.contributor.author","Brose, Ulrich"],["dc.date.accessioned","2018-11-07T09:34:51Z"],["dc.date.available","2018-11-07T09:34:51Z"],["dc.date.issued","2014"],["dc.description.abstract","While metabolic theory predicts variance in population density within communities depending on population average body masses, the ecological stoichiometry concept relates density variation across communities to varying resource stoichiometry. Using a data set including biomass densities of 4959 populations of soil invertebrates across 48 forest sites we combined these two frameworks. We analyzed how the scaling of biomass densities with population-averaged body masses systematically interacts with stoichiometric variables. Simplified analyses employing either only body masses or only resource stoichiometry are highly context sensitive and yield variable and often misleading results. Our findings provide strong evidence that analyses of ecological state variables should integrate allometric and stoichiometric variables to explain deviations from predicted allometric scaling and avoid erroneous conclusions. In consequence, our study provides an important step towards unifying two prominent ecological theories, metabolic theory and ecological stoichiometry."],["dc.description.sponsorship","DFG [1374, BR 2315/7-2]"],["dc.identifier.doi","10.1111/ele.12330"],["dc.identifier.isi","000341883000007"],["dc.identifier.pmid","25041038"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/32266"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Wiley-blackwell"],["dc.relation.issn","1461-0248"],["dc.relation.issn","1461-023X"],["dc.title","Unifying elemental stoichiometry and metabolic theory in predicting species abundances"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]