Scheu, Stefan

[["dc.bibliographiccitation.firstpage","436"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","Ecology Letters"],["dc.bibliographiccitation.lastpage","443"],["dc.bibliographiccitation.volume","15"],["dc.contributor.author","Schneider, Florian Dirk"],["dc.contributor.author","Scheu, Stefan"],["dc.contributor.author","Brose, Ulrich"],["dc.date.accessioned","2018-11-07T09:11:00Z"],["dc.date.available","2018-11-07T09:11:00Z"],["dc.date.issued","2012"],["dc.description.abstract","Understanding effects of species loss in complex food webs with multiple trophic levels is complicated by the idiosyncrasy of the predator effects on lower trophic levels: direct and indirect effects intermingle and may increase, decrease or not affect ecosystem functioning. We introduce a reductionist approach explaining a predators trophic effect only by empirically well-founded body-mass constraints on abundance, diet breadth and feeding strength. We demonstrate that this mechanistic concept successfully explains the positive, negative and neutral net effects of predators on decomposers in a litter microcosm experiment. This approach offers a new perspective on the interplay of complex interactions within food webs and is easily extendable to include phylogenetic and other body-mass independent traits. We anticipate that allometry will substantially improve our understanding of idiosyncratic predator effects in experiments and the consequences of predator loss in natural ecosystems."],["dc.identifier.doi","10.1111/j.1461-0248.2012.01750.x"],["dc.identifier.isi","000302288900005"],["dc.identifier.pmid","22380767"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/26623"],["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","Body mass constraints on feeding rates determine the consequences of predator loss"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","000"],["dc.bibliographiccitation.journal","The American Naturalist"],["dc.bibliographiccitation.lastpage","000"],["dc.bibliographiccitation.volume","194"],["dc.contributor.author","Potapov, Anton M."],["dc.contributor.author","Brose, Ulrich"],["dc.contributor.author","Scheu, Stefan"],["dc.contributor.author","Tiunov, Alexei V."],["dc.date.accessioned","2019-11-04T08:08:38Z"],["dc.date.available","2019-11-04T08:08:38Z"],["dc.date.issued","2019"],["dc.description.abstract","Do large organisms occupy higher trophic levels? Predators are often larger than their prey in food chains, but empirical evidence for positive body mass–trophic level scaling for entire food webs mostly comes from marine communities on the basis of unicellular producers. Using published data on stable isotope compositions of 1,093 consumer species, we explored how trophic level scales with body size, food web type (green vs. brown), and phylogenetic group across biomes. In contrast to widespread assumptions, the relationship between body size and trophic level of consumers—fromprotists to large vertebrates—was not significant per se but varied among ecosystemtypes and animal groups. The correlation between body size and trophic level was strong in marine consumers, weak in freshwater consumers, and absent in terrestrial consumers, which was also observed at the scale of local food webs. Vertebrates occupied higher trophic positions than invertebrates, and green trophic chains were longer than brown ones in aquatic (primarily marine) but not in terrestrial food webs. Variations in body size of top predators suggest that terrestrial andmany freshwater food webs are size compartmentalized, implying different trophic dynamics and responses to perturbations than in size-structured marine food webs."],["dc.identifier.doi","10.1086/705811"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/62561"],["dc.language.iso","en"],["dc.relation","SFB 990: Ökologische und sozioökonomische Funktionen tropischer Tieflandregenwald-Transformationssysteme (Sumatra, Indonesien)"],["dc.relation","SFB 990 | B | B08: Struktur und Funktion des Zersetzersystems in Transformationssystemen von Tiefland-Regenwäldern"],["dc.relation.issn","0003-0147"],["dc.relation.issn","1537-5323"],["dc.relation.orgunit","Zentrum für Biodiversität und Nachhaltige Landnutzung"],["dc.subject.gro","sfb990_reviews"],["dc.title","Trophic Position of Consumers and Size Structure of Food Webs across Aquatic and Terrestrial Ecosystems"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","overview_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","307"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","Pedobiologia"],["dc.bibliographiccitation.lastpage","312"],["dc.bibliographiccitation.volume","53"],["dc.contributor.author","Vucic-Pestic, Olivera"],["dc.contributor.author","Birkhofer, Klaus"],["dc.contributor.author","Rall, Bjoern Christian"],["dc.contributor.author","Scheu, Stefan"],["dc.contributor.author","Brose, Ulrich"],["dc.date.accessioned","2018-11-07T08:48:22Z"],["dc.date.available","2018-11-07T08:48:22Z"],["dc.date.issued","2010"],["dc.description.abstract","Functional responses describe the per capita consumption rates of predators depending on prey density, which quantifies the energy transfer between trophic levels. We studied a typical interaction of the litter-soil systems between hunting spiders (Pardosa lugubris; Araneae: Lycosidae) and springtails (Heteromurus nitidus; Collembola: Entomobryidae) at varying habitat structure, i.e. with moss vs. without moss. We found a hyperbolic increase in consumption (functional response type II) in the treatment without habitat structure that was converted into a roller-coaster (or dome-shaped in a broad sense) functional response in treatments with habitat structure. Additional experiments suggest that the reduced per capita consumption rates at high prey densities may be explained by aggregative defence behaviour of the springtails. Experimentally, this behaviour was induced by the presence of habitat structure. We analyzed the net-energy gain of this predator-prey interaction by comparing the predator's metabolic energy loss to its energy gain by consumption. In treatments with habitat structure, the net-energy gain of the predator was limited at intermediate prey densities where prey aggregation reduced the consumption rates. Our results stress the importance of habitat structure and prey behaviour in shaping the functional response in a typical soil-litter predator-prey interaction. (C) 2010 Elsevier GmbH. All rights reserved."],["dc.description.sponsorship","German Research Foundation [BR 2315/4-1, 6-1]"],["dc.identifier.doi","10.1016/j.pedobi.2010.02.003"],["dc.identifier.isi","000280531300004"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/21188"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Gmbh, Urban & Fischer Verlag"],["dc.relation.issn","0031-4056"],["dc.title","Habitat structure and prey aggregation determine the functional response in a soil predator-prey interaction"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1153"],["dc.bibliographiccitation.issue","10"],["dc.bibliographiccitation.journal","Oikos"],["dc.bibliographiccitation.lastpage","1156"],["dc.bibliographiccitation.volume","123"],["dc.contributor.author","Brose, Ulrich"],["dc.contributor.author","Scheu, Stefan"],["dc.date.accessioned","2018-11-07T09:34:36Z"],["dc.date.available","2018-11-07T09:34:36Z"],["dc.date.issued","2014"],["dc.identifier.doi","10.1111/oik.01768"],["dc.identifier.isi","000342754100001"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/32206"],["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","Into darkness: unravelling the structure of soil food webs"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.subtype","letter_note"],["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.firstpage","1224"],["dc.bibliographiccitation.issue","10"],["dc.bibliographiccitation.journal","Oikos"],["dc.bibliographiccitation.lastpage","1233"],["dc.bibliographiccitation.volume","123"],["dc.contributor.author","Lang, Birgit"],["dc.contributor.author","Rall, Bjoern Christian"],["dc.contributor.author","Scheu, Stefan"],["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","Soil systems maintain important ecosystem processes crucial for plant life and food production. Especially agricultural systems are strongly affected by climate change due to low vegetation cover associated with high temperatures and drought. Nevertheless, the response of soil systems to climate change is little explored. We used microcosms with a simplified soil community to address effects of climate change using independent temperature and dryness gradients and addressed their effects on top-down control and litter decomposition. The community consisted of maize litter as a basal resource, fungi, springtails and as top predators mites and centipedes. As the body-size structure is of high importance for communities, we included differently-sized springtails and predator species. After seven weeks, the experiment was terminated, and the impact of climate change on direct feeding interactions and indirect effects across trophic levels was analysed. With increasing temperature and dryness, consumption rates increased, thereby amplifying the negative influence of consumer populations on their resources. Hence, these climate-change variables increased the top-down control of 1) predators (mainly mites) on springtails and 2) fungi on litter decomposition. In addition, we found that the climate-change variables strengthened trophic cascades from predators on fungi whose density was thus increasingly decoupled from top-down control by their springtail consumers. Their increased decomposition rates are of high importance for carbon cycling and may result in accelerated nutrient turnover. In conclusion, our results suggest that climate change may strongly influence the structure and functioning of soil systems by strengthening consumption rates and trophic cascades, which will have far reaching consequences for the nutrient turnover and productivity of agricultural ecosystems."],["dc.identifier.doi","10.1111/j.1600-0706.2013.00894.x"],["dc.identifier.isi","000342754100008"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/32215"],["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","Effects of environmental warming and drought on size-structured soil food webs"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","131"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","The American Naturalist"],["dc.bibliographiccitation.lastpage","143"],["dc.bibliographiccitation.volume","190"],["dc.contributor.author","Jochum, Malte"],["dc.contributor.author","Barnes, Andrew D."],["dc.contributor.author","Ott, David"],["dc.contributor.author","Lang, Birgit"],["dc.contributor.author","Klarner, Bernhard"],["dc.contributor.author","Farajallah, Achmad"],["dc.contributor.author","Scheu, Stefan"],["dc.contributor.author","Brose, Ulrich"],["dc.date.accessioned","2018-11-07T10:22:18Z"],["dc.date.available","2018-11-07T10:22:18Z"],["dc.date.issued","2017"],["dc.description.abstract","Living organisms are constrained by both resource quantity and quality. Ecological stoichiometry offers important insights into how the elemental composition of resources affects their consumers. If resource quality decreases, consumers can respond by shifting their body stoichiometry, avoiding low-quality resources, or up-regulating feeding rates to maintain the supply of required elements while excreting excess carbon (i.e., compensatory feeding). We analyzed multitrophic consumer body stoichiometry, biomass, and feeding rates along a resource-quality gradient in the litter of tropical forest and rubber and oil-palm plantations. Specifically, we calculated macroinvertebrate feeding rates based on consumer metabolic demand and assimilation efficiency. Using linear mixed effects models, we assessed resource-quality effects on macroinvertebrate detritivore and predator communities. We did not detect shifts in consumer body stoichiometry or decreases in consumer biomass in response to declining resource quality, as indicated by increasing carbon-to-nitrogen ratios. However, across trophic levels, we found a strong indication of decreasing resource quality leading to increased consumer feeding rates through altered assimilation efficiency and community body size structure. Our study reveals the influence of resource quality on multitrophic consumer feeding rates and suggests compensatory feeding to be more common across consumer trophic levels than was formerly known."],["dc.identifier.doi","10.1086/691790"],["dc.identifier.isi","000403565000012"],["dc.identifier.pmid","28617641"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/42244"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","PUB_WoS_Import"],["dc.relation","SFB 990: Ökologische und sozioökonomische Funktionen tropischer Tieflandregenwald-Transformationssysteme (Sumatra, Indonesien)"],["dc.relation","SFB 990 | B | B01: Structure, stability and functioning of macro-invertebrate communities in rainforest transformation systems in Sumatra (Indonesia)"],["dc.relation","SFB 990 | B | B08: Struktur und Funktion des Zersetzersystems in Transformationssystemen von Tiefland-Regenwäldern"],["dc.relation.issn","1537-5323"],["dc.relation.issn","0003-0147"],["dc.subject.gro","sfb990_journalarticles"],["dc.title","Decreasing Stoichiometric Resource Quality Drives Compensatory Feeding across Trophic Levels in Tropical Litter Invertebrate Communities"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","297"],["dc.bibliographiccitation.journal","Advances in Ecological Research"],["dc.bibliographiccitation.lastpage","322"],["dc.bibliographiccitation.volume","61"],["dc.contributor.author","Hines, Jes"],["dc.contributor.author","Ebeling, Anne"],["dc.contributor.author","Barnes, Andrew D."],["dc.contributor.author","Brose, Ulrich"],["dc.contributor.author","Scherber, Christoph"],["dc.contributor.author","Scheu, Stefan"],["dc.contributor.author","Tscharntke, Teja"],["dc.contributor.author","Weisser, Wolfgang W."],["dc.contributor.author","Giling, Darren P."],["dc.contributor.author","Klein, Alexandra M."],["dc.contributor.author","Eisenhauer, Nico"],["dc.date.accessioned","2019-07-23T07:31:59Z"],["dc.date.available","2019-07-23T07:31:59Z"],["dc.date.issued","2019"],["dc.description.abstract","Human activities are causing major changes in biological communities worldwide. Due to concern about the consequences of these changes, an academic conversation about biodiversity and ecosystem functioning (BEF) has emerged over the last few decades. Here we use a keyword co-occurrence analysis to characterize and review 28 years of research focused on these terms. We find that the rapidly growing literature has developed in four research domains. The first two domains “BEF Experiments” and “Science Policy” emerge early, and persist through time, as core research areas with emphases on experiments and management, respectively. The second two domains, “Agricultural Landscapes” and “Aquatic Food Webs”, arise as integrative domains that connect divisions in scientific discussion surrounding BEF Experiments and Science Policy. Terms related to species interactions (i.e. pollinator, predator, food web) appear more commonly in the two integrative domains reflecting shared interests of many scientists focusing on biodiversity and ecosystem functioning. Despite shared interests in food webs, research in the four domains differ with respect to their spatial scale, baseline comparisons, and currency of measurements. Food-web research that bridges these divides should be pushed to the forefront of biodiversity and ecosystem functioning research priorities."],["dc.identifier.doi","10.1016/bs.aecr.2019.06.008"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/61867"],["dc.language.iso","en"],["dc.relation.issn","0065-2504"],["dc.title","Mapping change in biodiversity and ecosystem function research: Food webs foster integration of experiments and science policy"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1339"],["dc.bibliographiccitation.issue","10"],["dc.bibliographiccitation.journal","Ecology Letters"],["dc.bibliographiccitation.lastpage","1340"],["dc.bibliographiccitation.volume","17"],["dc.contributor.author","Schneider, Florian Dirk"],["dc.contributor.author","Scheu, Stefan"],["dc.contributor.author","Brose, Ulrich"],["dc.date.accessioned","2018-11-07T09:34:52Z"],["dc.date.available","2018-11-07T09:34:52Z"],["dc.date.issued","2014"],["dc.identifier.doi","10.1111/ele.12333"],["dc.identifier.isi","000341883000017"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/32267"],["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","Body mass constraints on feeding rates determine the consequences of predator loss (vol 15, pg 436, 2012)"],["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"]]