Schaefer, Matthias

[["dc.bibliographiccitation.firstpage","S61"],["dc.bibliographiccitation.journal","European Journal of Soil Biology"],["dc.bibliographiccitation.lastpage","S67"],["dc.bibliographiccitation.volume","43"],["dc.contributor.author","Cesarz, Simone"],["dc.contributor.author","Fahrenholz, Nadine"],["dc.contributor.author","Migge-Kleian, Sonja"],["dc.contributor.author","Platner, Christian"],["dc.contributor.author","Schaefer, Matthias"],["dc.date.accessioned","2018-11-07T10:56:32Z"],["dc.date.available","2018-11-07T10:56:32Z"],["dc.date.issued","2007"],["dc.description.abstract","The understanding of belowground biodiversity is still rather incomplete and interactions between above- and belowground systems have rarely been looked at when explaining belowground biodiversity patterns. The present study presents results of the influence of tree species diversity on the earthworm community in a central European deciduous mixed forest. Within the Hainich National Park three replicate sites were chosen within three levels of tree diversity ranging from one species (beech, DL1) to three species (beech, lime, ash, DL2) to five species stands (beech, lime, ash, hornbeam, maple, DL3). Earthworms were extracted by heat from soil and litter samples at four sampling dates at each site. In addition, in spring four samples per site were sorted by hand and identified to species level. Generally, earthworm densities were positively correlated with tree diversity in May and November but negatively in February. Sites with low tree species diversity had earthworm populations which were more stable due to a more permanent and deeper litter layer. Increasing proportions of high quality litter in DL2 und DL3 were correlated with higher densities of both epigeic and endogeic earthworm species, while litter in DL1 sites was mainly inhabited by epigeic species. Generally, there was a positive correlation between earthworm and tree species diversity indicating the importance of diverse food qualities for the decomposer fauna at the local scale especially in springtime. (C) 2007 Elsevier Masson SAS. All rights reserved."],["dc.identifier.doi","10.1016/j.ejsobi.2007.08.003"],["dc.identifier.isi","000251803300012"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/50035"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier France-editions Scientifiques Medicales Elsevier"],["dc.publisher.place","Paris"],["dc.relation.conference","8th International Symposium on Earthworm Ecology (ISEE8)"],["dc.relation.eventlocation","Cracow, POLAND"],["dc.relation.issn","1164-5563"],["dc.title","Earthworm communities in relation to tree diversity in a deciduous forest"],["dc.type","conference_paper"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","36"],["dc.bibliographiccitation.journal","Soil Biology and Biochemistry"],["dc.bibliographiccitation.lastpage","45"],["dc.bibliographiccitation.volume","62"],["dc.contributor.author","Cesarz, Simone"],["dc.contributor.author","Ruess, Liliane"],["dc.contributor.author","Jacob, Mascha"],["dc.contributor.author","Jacob, Andreas"],["dc.contributor.author","Schaefer, Matthias"],["dc.contributor.author","Scheu, Stefan"],["dc.date.accessioned","2018-11-07T09:23:18Z"],["dc.date.available","2018-11-07T09:23:18Z"],["dc.date.issued","2013"],["dc.description.abstract","Positive relationships between biodiversity and ecosystem functioning are reported in many studies. The underlying mechanisms are, however, only little understood, likely due to the focus on the aboveground system and neglecting species-specific traits. We used different clusters of tree species composition to investigate how tree species diversity and tree species identity affect belowground nematode communities. Since soil nematodes comprise different trophic groups and are strongly linked to the microbial community, results can provide insight on how soil food webs are structured. In addition, data on leaf litter and fine root biomass were included to account for different effects of aboveground and belowground resources. Clusters of three trees of one, two and three species were identified within a temperate deciduous forest. Target tree species were European beech (Fagus sylvatica), common ash (Fraxinus excelsior) and lime (Tilia cordata, T. platyphyllos) differing in physiology, leaf litter quality and type of mycorrhiza. Tree species identity strongly affected nematode trophic structure, whereas tree Species diversity had no impact. Ash beneficially affected bacterial-feeding nematodes, whereas fungal feeders were suppressed, likely caused by ash litter increasing soil pH. Fostering of the bacterial food chain by ash additionally could be related to rhizodeposition gaining importance after disappearance of high quality ash litter in spring, highlighting seasonal shifts in root and leaf litter-derived resources. The negative effect of ash on fungal-feeding nematodes is suggested to be due to the lack of ectomycorrhizal fungi as ash roots only form arbuscular mycorrhiza. In contrast, beech benefited fungal feeders and detrimentally affected bacterial feeders due to more acidic soil conditions that increase the competitive strength of fungi. Lime tended to negatively impact total nematode density but positively influenced plant-feeding nematodes. Generally, beech and ash strongly but opposingly influenced the trophic structure of nematode communities suggesting that changes in tree species identity result in major shifts in the channeling of energy through decomposer food webs. The results indicate that the structure of soil food webs varies markedly with tree species and point to the importance of basal resources, i.e., leaf litter and rhizodeposits. This suggests bottom-up forces mediated by individual tree species to control major decomposition pathways rather than tree diversity. (C) 2013 Elsevier Ltd. All rights reserved."],["dc.identifier.doi","10.1016/j.soilbio.2013.02.020"],["dc.identifier.isi","000320425800006"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/29546"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Pergamon-elsevier Science Ltd"],["dc.relation.issn","0038-0717"],["dc.title","Tree species diversity versus tree species identity: Driving forces in structuring forest food webs as indicated by soil nematodes"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","23"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Pedobiologia"],["dc.bibliographiccitation.lastpage","32"],["dc.bibliographiccitation.volume","58"],["dc.contributor.author","Cesarz, Simone"],["dc.contributor.author","Reich, Peter B."],["dc.contributor.author","Scheu, Stefan"],["dc.contributor.author","Ruess, Liliane"],["dc.contributor.author","Schaefer, Matthias"],["dc.contributor.author","Eisenhauer, Nico"],["dc.date.accessioned","2018-11-07T10:03:29Z"],["dc.date.available","2018-11-07T10:03:29Z"],["dc.date.issued","2015"],["dc.description.abstract","Soils store 80% of global terrestrial organic carbon and alterations in fluxes into and out of this pool may interact with ongoing climate change. Belowground food webs drive soil C dynamics, but little is known about their responses to co-occurring global change agents. We investigated open-air experimental grassland communities at ambient and elevated atmospheric CO2 concentration, ambient and enriched nitrogen input, and ambient and reduced summer precipitation to evaluate how these agents interactively affect soil nematodes, which are often used as an indicator group for soil food web structure and soil health. The aim of the study was to elucidate the response of the functional diversity of soil nematodes to changing environmental conditions by using nematode functional guilds and indices as indicators. The results suggest that nematode functional guilds surpass nematode trophic groups as soil indicators, suggesting that more detailed data on nematode community structure is essential to capture functional changes in response to environmental change. For instance, the density of opportunistic fungal feeders increased due to N addition with the response being more pronounced at elevated CO2, whereas densities of sensitive fungal-feeders were increased at ambient N and elevated CO2, illustrating opposing responses within one trophic group. Opportunistic bacterial feeders increased at elevated N, but did not respond to other environmental factors studied. Root-feeding Longidoridae were significantly reduced at elevated CO2 and elevated N compared to ambient conditions, whereas other plant feeders were little affected by the manipulations. Predacious nematodes were less abundant at elevated N, and the Structure Index (which indicates food web structure) suggested reduced top-down forces and simplified soil food webs, although omnivores did not vary significantly. Elevated CO2 buffered the effect of reduced precipitation on the Enrichment Index (which indicates increased resource availability) and the Channel Index (which indicates changes in decomposition channel) probably due to reduced stomatal conductance at elevated CO2. Further, the results suggest that the decomposer community switched from a bacterial-dominated to a fungal-dominated system at elevated N, indicating shifts in the microbial community as well as in the functioning of belowground food webs. Overall, the studied global change agents interactively and differentially affected functional guilds of soil nematodes, suggesting complex changes in soil processes. We highlight that detailed information on the functional guilds of nematodes is likely necessary to fully understand alterations in soil food webs and related processes due to global environmental change. (C) 2015 Elsevier GmbH. All rights reserved."],["dc.identifier.doi","10.1016/j.pedobi.2015.01.001"],["dc.identifier.isi","000351652200004"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/38477"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Gmbh, Urban & Fischer Verlag"],["dc.relation.issn","0031-4056"],["dc.title","Nematode functional guilds, not trophic groups, reflect shifts in soil food webs and processes in response to interacting global change factors"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]