Maraun, Mark

[["dc.bibliographiccitation.artnumber","e47128"],["dc.bibliographiccitation.issue","10"],["dc.bibliographiccitation.journal","PLoS ONE"],["dc.bibliographiccitation.volume","7"],["dc.contributor.author","Homeier, Jürgen"],["dc.contributor.author","Hertel, Dietrich"],["dc.contributor.author","Camenzind, Tessa"],["dc.contributor.author","Cumbicus, Nixon L."],["dc.contributor.author","Maraun, Mark"],["dc.contributor.author","Martinson, Guntars O."],["dc.contributor.author","Poma, L. Nohemy"],["dc.contributor.author","Rillig, Matthias C."],["dc.contributor.author","Sandmann, Dorothee"],["dc.contributor.author","Scheu, Stefan"],["dc.contributor.author","Veldkamp, Edzo"],["dc.contributor.author","Wilcke, Wolfgang"],["dc.contributor.author","Wullaert, Hans"],["dc.contributor.author","Leuschner, Christoph"],["dc.contributor.editor","Chen, Han Y. H."],["dc.date.accessioned","2017-09-07T11:54:53Z"],["dc.date.available","2017-09-07T11:54:53Z"],["dc.date.issued","2012"],["dc.description.abstract","Tropical regions are facing increasing atmospheric inputs of nutrients, which will have unknown consequences for the structure and functioning of these systems. Here, we show that Neotropical montane rainforests respond rapidly to moderate additions of N (50 kg ha(-1) yr(-1)) and P (10 kg ha(-1) yr(-1)). Monitoring of nutrient fluxes demonstrated that the majority of added nutrients remained in the system, in either soil or vegetation. N and P additions led to not only an increase in foliar N and P concentrations, but also altered soil microbial biomass, standing fine root biomass, stem growth, and litterfall. The different effects suggest that trees are primarily limited by P, whereas some processes-notably aboveground productivity--are limited by both N and P. Highly variable and partly contrasting responses of different tree species suggest marked changes in species composition and diversity of these forests by nutrient inputs in the long term. The unexpectedly fast response of the ecosystem to moderate nutrient additions suggests high vulnerability of tropical montane forests to the expected increase in nutrient inputs."],["dc.identifier.doi","10.1371/journal.pone.0047128"],["dc.identifier.gro","3150124"],["dc.identifier.pmid","23071734"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/8325"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6854"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","final"],["dc.relation.issn","1932-6203"],["dc.rights","CC BY 2.5"],["dc.rights.uri","https://creativecommons.org/licenses/by/2.5"],["dc.title","Tropical Andean Forests Are Highly Susceptible to Nutrient Inputs—Rapid Effects of Experimental N and P Addition to an Ecuadorian Montane Forest"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.journal","Experimental and Applied Acarology"],["dc.contributor.author","Cordes, Peter Hans"],["dc.contributor.author","Maraun, Mark"],["dc.contributor.author","Schaefer, Ina"],["dc.date.accessioned","2022-02-01T10:31:55Z"],["dc.date.available","2022-02-01T10:31:55Z"],["dc.date.issued","2022"],["dc.description.abstract","Abstract Oribatid mites are tiny arthropods that are common in all soils of the world; however, they also occur in microhabitats above the soil such as lichens, mosses, on the bark of trees and in suspended soils. For understanding oribatid mite community structure, it is important to know whether they are dispersal limited. The aim of this study was to investigate the importance of oribatid mite dispersal using Malaise traps to exclude sole passive wind-dispersal. Oribatid mite communities were collected over a 3-year period from five habitat types (coniferous forests, deciduous forests, mixed forests, meadows, bog/heathlands sites) and three seasons (spring, summer, autumn) in Sweden. Mites entered traps either by walking or by phoresy, i.e., by being attached to flying insects. We hypothesized (1) that oribatid mite communities in the traps differ between habitats, indicating habitat-limited dispersal, and (2) that oribatid mite communities differ among seasons suggesting that dispersal varies due to changing environmental conditions such as moisture or resource availability. The majority of the collected species were not typically soil-living species but rather from habitats such as trees, lichens and mosses (e.g., Carabodes labyrinthicus, Cymbaeremaeus cymba, Diapterobates humeralis and Phauloppia lucorum ) indicating that walking into the traps or entering them via phoresy are of greater importance for aboveground than for soil-living species. Overall, oribatid mite communities collected in the traps likely originated from the surrounding local habitat suggesting that long distance dispersal of oribatid mites is scarce. Significant differences among seasons indicate higher dispersal during warm and dry periods of the year. Notably, 16 species of oribatid mites collected in our study were sampled for the first time in Sweden. This study also demonstrates that Malaise traps are a meaningful tool to investigate spatial and temporal patterns of oribatid mite communities."],["dc.description.abstract","Abstract Oribatid mites are tiny arthropods that are common in all soils of the world; however, they also occur in microhabitats above the soil such as lichens, mosses, on the bark of trees and in suspended soils. For understanding oribatid mite community structure, it is important to know whether they are dispersal limited. The aim of this study was to investigate the importance of oribatid mite dispersal using Malaise traps to exclude sole passive wind-dispersal. Oribatid mite communities were collected over a 3-year period from five habitat types (coniferous forests, deciduous forests, mixed forests, meadows, bog/heathlands sites) and three seasons (spring, summer, autumn) in Sweden. Mites entered traps either by walking or by phoresy, i.e., by being attached to flying insects. We hypothesized (1) that oribatid mite communities in the traps differ between habitats, indicating habitat-limited dispersal, and (2) that oribatid mite communities differ among seasons suggesting that dispersal varies due to changing environmental conditions such as moisture or resource availability. The majority of the collected species were not typically soil-living species but rather from habitats such as trees, lichens and mosses (e.g., Carabodes labyrinthicus, Cymbaeremaeus cymba, Diapterobates humeralis and Phauloppia lucorum ) indicating that walking into the traps or entering them via phoresy are of greater importance for aboveground than for soil-living species. Overall, oribatid mite communities collected in the traps likely originated from the surrounding local habitat suggesting that long distance dispersal of oribatid mites is scarce. Significant differences among seasons indicate higher dispersal during warm and dry periods of the year. Notably, 16 species of oribatid mites collected in our study were sampled for the first time in Sweden. This study also demonstrates that Malaise traps are a meaningful tool to investigate spatial and temporal patterns of oribatid mite communities."],["dc.identifier.doi","10.1007/s10493-022-00686-y"],["dc.identifier.pii","686"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/98981"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-517"],["dc.relation.eissn","1572-9702"],["dc.relation.issn","0168-8162"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.title","Dispersal patterns of oribatid mites across habitats and seasons"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","10"],["dc.bibliographiccitation.journal","Soil Biology and Biochemistry"],["dc.bibliographiccitation.lastpage","17"],["dc.bibliographiccitation.volume","46"],["dc.contributor.author","Jacquemin, Justine"],["dc.contributor.author","Maraun, Mark"],["dc.contributor.author","Roisin, Yves"],["dc.contributor.author","Leponce, Maurice"],["dc.date.accessioned","2018-11-07T09:13:11Z"],["dc.date.available","2018-11-07T09:13:11Z"],["dc.date.issued","2012"],["dc.description.abstract","In tropical ecosystems, access to nitrogen (N) and phosphorus (P) limits the decomposition rate of leaf-litter. Leaf-litter ants are abundant in this microhabitat and present a wide variety of diets. Our aim was to study the response of various ant trophic groups to an increased nutrient availability which boosts the decomposition of their habitat and selectively affects the abundance of their prey. A 6-month nutrient addition experiment (CN, CNP) was performed in a tropical montane forest of the Ecuadorian Andes. The density of ants, of other predators (e.g. arachnids, beetles) and of their potential prey (mesofauna, ranging from 0.1 to 2 mm) was measured in treatments and control plots. The litter volume in fertilized plots decreased significantly. Collembola and total mesofauna density were enhanced by the CNP addition. Ants responded differentially according to their trophic group: despite increased prey availability, predatory species in general and collembolan hunters in particular were negatively affected by both treatments. Other ant trophic group densities did not change. By contrast, the density of Dermaptera increased with the treatments. A complementary isotopic approach allowed us to trace carbon fluxes through the food web. Our results suggest that the nutrient input enhanced the litter decomposition rate, leading to reduction of habitat size. They also suggest that predatory ants in tropical leaf-litter food webs are limited by habitat size rather than by prey availability, and that these ants are more affected by habitat loss than their prey, other ant trophic groups and other macrofauna taxa. (C) 2011 Elsevier Ltd. All rights reserved."],["dc.identifier.doi","10.1016/j.soilbio.2011.11.007"],["dc.identifier.isi","000300743400002"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/27117"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Pergamon-elsevier Science Ltd"],["dc.relation.issn","0038-0717"],["dc.title","Differential response of ants to nutrient addition in a tropical Brown Food Web"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","e113268"],["dc.bibliographiccitation.issue","11"],["dc.bibliographiccitation.journal","PLoS ONE"],["dc.bibliographiccitation.volume","9"],["dc.contributor.author","von Saltzwedel, Helge"],["dc.contributor.author","Maraun, Mark"],["dc.contributor.author","Scheu, Stefan"],["dc.contributor.author","Schaefer, Ina"],["dc.date.accessioned","2018-11-07T09:32:35Z"],["dc.date.available","2018-11-07T09:32:35Z"],["dc.date.issued","2014"],["dc.description.abstract","Parthenogenetic lineages may colonize marginal areas of the range of related sexual species or coexist with sexual species in the same habitat. Frozen-Niche-Variation and General-Purpose-Genotype are two hypotheses suggesting that competition and interclonal selection result in parthenogenetic populations being either genetically diverse or rather homogeneous. The cosmopolitan parthenogenetic oribatid mite Oppiella nova has a broad ecological phenotype and is omnipresent in a variety of habitats. Morphological variation in body size is prominent in this species and suggests adaptation to distinct environmental conditions. We investigated genetic variance and body size of five independent forest -grassland ecotones. Forests and grasslands were inhabited by distinct genetic lineages with transitional habitats being colonized by both genetic lineages from forest and grassland. Notably, individuals of grasslands were significantly larger than individuals in forests. These differences indicate the presence of specialized genetic lineages specifically adapted to either forests or grasslands which coexist in transitional habitats. Molecular clock estimates suggest that forest and grassland lineages separated 16-6 million years ago, indicating long-term persistence of these lineages in their respective habitat. Long-term persistence, and morphological and genetic divergence imply that drift and environmental factors result in the evolution of distinct parthenogenetic lineages resembling evolution in sexual species. This suggests that parthenogenetic reproduction is not an evolutionary dead end."],["dc.description.sponsorship","Open-Access-Publikationsfonds 2014"],["dc.identifier.doi","10.1371/journal.pone.0113268"],["dc.identifier.isi","000345533200087"],["dc.identifier.pmid","25409516"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/11138"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/31783"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Public Library Science"],["dc.relation.issn","1932-6203"],["dc.rights","CC BY 3.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/3.0"],["dc.title","Evidence for Frozen-Niche Variation in a Cosmopolitan Parthenogenetic Soil Mite Species (Acari, Oribatida)"],["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","1126"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","The ISME Journal"],["dc.bibliographiccitation.lastpage","1134"],["dc.bibliographiccitation.volume","8"],["dc.contributor.author","Krashevska, Valentyna"],["dc.contributor.author","Sandmann, Dorothee"],["dc.contributor.author","Maraun, Mark"],["dc.contributor.author","Scheu, Stefan"],["dc.date.accessioned","2018-11-07T09:40:57Z"],["dc.date.available","2018-11-07T09:40:57Z"],["dc.date.issued","2014"],["dc.description.abstract","We investigated the response of soil microbial communities in tropical ecosystems to increased nutrient deposition, such as predicted by anthropogenic change scenarios. Moderate amounts of nitrogen and phosphorus and their combination were added along an altitudinal transect. We expected microorganisms and microbial grazers (testate amoebae) to significantly respond to nutrient additions with the effect increasing with increasing altitude and with duration of nutrient additions. Further, we expected nutrients to alter grazer-prey interrelationships. Indeed, nutrient additions strongly altered microbial biomass (MB) and community structure as well as the community structure of testate amoebae. The response of microorganisms varied with both altitude and duration of nutrient addition. The results indicate that microorganisms are generally limited by N, but saprotrophic fungi also by P. Also, arbuscular mycorrhizal fungi benefited from N and/or P addition. Parallel to MB, testate amoebae benefited from the addition of N but were detrimentally affected by P, with the addition of P negating the positive effect of N. Our data suggests that testate amoeba communities are predominantly structured by abiotic factors and by antagonistic interactions with other microorganisms, in particular mycorrhizal fungi, rather than by the availability of prey. Overall, the results suggest that the decomposer system of tropical montane rainforests significantly responds to even moderate changes in nutrient inputs with the potential to cause major ramifications of the whole ecosystem including litter decomposition and plant growth."],["dc.description.sponsorship","German Research Foundation (DFG) [FOR 816]"],["dc.identifier.doi","10.1038/ismej.2013.209"],["dc.identifier.isi","000334912000016"],["dc.identifier.pmid","24285360"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/12122"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/33616"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Nature Publishing Group"],["dc.relation.issn","1751-7370"],["dc.relation.issn","1751-7362"],["dc.rights","CC BY-NC-SA 3.0"],["dc.rights.uri","https://creativecommons.org/licenses/by-nc-sa/3.0"],["dc.title","Moderate changes in nutrient input alter tropical microbial and protist communities and belowground linkages"],["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","56"],["dc.bibliographiccitation.journal","Soil Biology and Biochemistry"],["dc.bibliographiccitation.lastpage","63"],["dc.bibliographiccitation.volume","53"],["dc.contributor.author","Perdomo, Giselle"],["dc.contributor.author","Evans, Alistair"],["dc.contributor.author","Maraun, Mark"],["dc.contributor.author","Sunnucks, Paul"],["dc.contributor.author","Thompson, Ross M."],["dc.date.accessioned","2018-11-07T09:05:40Z"],["dc.date.available","2018-11-07T09:05:40Z"],["dc.date.issued","2012"],["dc.description.abstract","Mosses provide habitat for microarthropod communities that are dominated in abundance and richness by mites. Although these systems are used as experimental models to address questions of relevance to general ecology, and despite the fact that they are also of relevance to key, ecosystem-wide functions such as nutrient cycling rates, the trophic relationships that underpin these functions are poorly resolved. The complexity of the moss habitat matrix and the small size of its residents have hampered progress in the determination of diets. We use stable isotope analysis of moss communities and present tools that allow for more in-depth studies of food web structure in mosses and soils than are currently available. We test in mites for the first time the association between mouthpart morphology and isotope signatures. Isotopes capture the diet of mites under field conditions and over a longer time-span than traditional, snapshot measures of diet such as gut contents analyses. Our data suggest that cheliceral morphology can be used as a first inexpensive and quick filter for estimation of dietary preference in mites, with ambiguous trophic relationships resolved through isotope analyses. This work provides new information and tools for the study of mite-dominated food webs. (C) 2012 Elsevier Ltd. All rights reserved."],["dc.identifier.doi","10.1016/j.soilbio.2012.05.002"],["dc.identifier.isi","000307141400008"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/25376"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Pergamon-elsevier Science Ltd"],["dc.relation.issn","0038-0717"],["dc.title","Mouthpart morphology and trophic position of microarthropods from soils and mosses are strongly correlated"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","697"],["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","Biology and Fertility of Soils"],["dc.bibliographiccitation.lastpage","705"],["dc.bibliographiccitation.volume","51"],["dc.contributor.author","Krashevska, Valentyna"],["dc.contributor.author","Klarner, Bernhard"],["dc.contributor.author","Widyastuti, Rahayu"],["dc.contributor.author","Maraun, Mark"],["dc.contributor.author","Scheu, Stefan"],["dc.date.accessioned","2018-11-07T09:53:51Z"],["dc.date.available","2018-11-07T09:53:51Z"],["dc.date.issued","2015"],["dc.description.abstract","Focusing on Sumatra, a hotspot of tropical lowland rainforest transformation, we investigated effects of the conversion of rainforests into rubber agroforests (\"jungle rubber\"), intensive rubber, and oil palm plantations on the communities of litter and soil microorganisms and identified factors responsible for these changes. Litter basal respiration, microbial biomass, total bacterial phospholipid fatty acids (PLFAs), and fungal PLFAs did not vary significantly with rainforest conversion. In litter of converted ecosystems, the concentration of certain PLFAs including the Gram-negative bacteria marker PLFA cy17:0 and the Gram-positive bacteria marker PLFA i17:0 was reduced as compared to rainforest, whereas the concentration of the arbuscular mycorrhizal fungi (AMF) marker neutral lipid fatty acid (NLFA) 16:1 omega 5c increased. As indicated by redundancy analysis, litter pH and carbon concentration explained most of the variation in litter microbial community composition. In soil, microbial biomass did not vary significantly with rainforest conversion, whereas basal respiration declined. Total PLFAs and especially that of Gram-negative bacteria decreased, whereas PLFA i17:0 increased with rainforest conversion. The concentration of fungal PLFAs increased with rainforest conversion, whereas NLFA 16:1 omega 5c did not change significantly. Redundancy analysis indicated that soil pH explained most of the variation in soil microbial community composition. Overall, the data suggest that conversion of rainforests into production systems results in more pronounced changes in microbial community composition in soil as compared to litter. In particular, the response of fungi and bacteria was more pronounced in soil, while the response of AMF was more pronounced in litter. Notably, only certain bacterial markers but not those of saprotrophic fungi and AMF were detrimentally affected by rainforest conversion."],["dc.description.sponsorship","German Research Foundation (DFG) [CRC990]"],["dc.identifier.doi","10.1007/s00374-015-1021-4"],["dc.identifier.isi","000359160800006"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/36417"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["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","1432-0789"],["dc.relation.issn","0178-2762"],["dc.subject.gro","sfb990_journalarticles"],["dc.title","Impact of tropical lowland rainforest conversion into rubber and oil palm plantations on soil microbial 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","603"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","Acta Oecologica"],["dc.bibliographiccitation.lastpage","609"],["dc.bibliographiccitation.volume","35"],["dc.contributor.author","Kardol, Paul"],["dc.contributor.author","Newton, Jeffrey S."],["dc.contributor.author","Bezemer, T. Martijn"],["dc.contributor.author","Maraun, Mark"],["dc.contributor.author","van der Putten, Wim H."],["dc.date.accessioned","2018-11-07T11:24:27Z"],["dc.date.available","2018-11-07T11:24:27Z"],["dc.date.issued","2009"],["dc.description.abstract","Soil biodiversity has been recognized as a key feature of ecosystem functioning and stability. However, soil biodiversity is strongly impaired by agriculture and relatively little is known on how and at what spatial and temporal scales soil biodiversity is restored after the human disturbances have come to an end. Here, a multi-scale approach was used to compare diversity patterns of soil mites and nematodes at four stages (early, mid, late, reference site) along a secondary succession chronosequence from abandoned arable land to heath land. In each field four soil samples were taken during four successive seasons. We determined soil diversity within samples (alpha-diversity), between samples (beta-diversity) and within field sites (gamma-diversity). The patterns of alpha- and gamma-diversity developed similarly along the chronosequence for oribatid mites, but not for nematodes. Nematode alpha-diversity was highest in mid- and late-successional sites, while gamma-diversity was constant along the chronosequence. Oribatid mite beta-diversity was initially high, but decreased thereafter, whereas nematode beta-diversity increased when succession proceeded: indicating that patterns of within-site heterogeneity diverged for oribatid mites and nematodes. The spatio-temporal diversity patterns after land abandonment suggest that oribatid mite community development depends predominantly on colonization of new taxa, whereas nematode community development depends on shifts in dominance patterns. This would imply that at old fields diversity patterns of oribatid mites are mainly controlled by dispersal, whereas diversity patterns of nematodes are mainly controlled by changing abiotic or biotic soil conditions. Our Study shows that the restoration of soil biodiversity along secondary successional gradients can be both scale- and phylum-dependent. Published by Elsevier Masson SAS."],["dc.identifier.doi","10.1016/j.actao.2009.05.006"],["dc.identifier.isi","000270748300006"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/56409"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Gauthier-villars/editions Elsevier"],["dc.relation.issn","1146-609X"],["dc.title","Contrasting diversity patterns of soil mites and nematodes in secondary succession"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","469"],["dc.bibliographiccitation.journal","Journal of Tropical Ecology"],["dc.bibliographiccitation.lastpage","476"],["dc.bibliographiccitation.volume","22"],["dc.contributor.author","Kupfer, Alexander"],["dc.contributor.author","Langel, Reinhard"],["dc.contributor.author","Scheu, Stefan"],["dc.contributor.author","Himstedt, Werner"],["dc.contributor.author","Maraun, Mark"],["dc.date.accessioned","2018-11-07T09:37:30Z"],["dc.date.available","2018-11-07T09:37:30Z"],["dc.date.issued","2006"],["dc.description.abstract","We used stable isotope analysis (N-15/N-14) to characterize the trophic relationships of consumer communities of an aquatic food web (a permanent pond) and the adjacent terrestrial food web (secondary dry dipterocarp forest) from a seasonal tropical field site in north-eastern Thailand. In general, isotopic signatures of aquatic vertebrates were high er (delta N-15 range = 4.51-9.90%) than those of invertebrates (delta N-15 range = 1.10-6.00%). High N-15 signatures identified water snakes and swamp eels as top predators in the pond food web. In the terrestrial food web N-15 signatures of saprophagous litter invertebrates (diplopods, earthworms). termites, ants and beetle larvae were lower than in those of predatory invertebrates (scolopendrids, scorpions, whip spiders). Predatory terrestrial frogs and caecilians had lower N-15 signatures than snakes. indicating that snakes are among the top predators in the terrestrial web. Based on the distribution of isotopic signatures, we estimated five trophic levels for both the aquatic and terrestrial food web. The food chains of a seasonal tropical site studied were rather short. which implies similarities to the structure of temperate food webs."],["dc.identifier.doi","10.1017/S0266467406003336"],["dc.identifier.isi","000239587500011"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/32858"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Cambridge Univ Press"],["dc.relation.issn","0266-4674"],["dc.title","Trophic ecology of a tropical aquatic and terrestrial food web: insights from stable isotopes (N-15)"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1199"],["dc.bibliographiccitation.issue","10"],["dc.bibliographiccitation.journal","Oikos"],["dc.bibliographiccitation.lastpage","1211"],["dc.bibliographiccitation.volume","123"],["dc.contributor.author","Heidemann, Kerstin"],["dc.contributor.author","Hennies, Annika"],["dc.contributor.author","Schakowske, Johanna"],["dc.contributor.author","Blumenberg, Lars"],["dc.contributor.author","Ruess, Liliane"],["dc.contributor.author","Scheu, Stefan"],["dc.contributor.author","Maraun, Mark"],["dc.date.accessioned","2018-11-07T09:34:37Z"],["dc.date.available","2018-11-07T09:34:37Z"],["dc.date.issued","2014"],["dc.description.abstract","Nematodes are the most abundant invertebrates in soils and are key prey in soil food webs. Uncovering their contribution to predator nutrition is essential for understanding the structure of soil food webs and the way energy channels through soil systems. Molecular gut content analysis of consumers of nematodes, such as soil microarthropods, using specific DNA markers is a novel approach for studying predator-prey interactions in soil. We designed new specific primer pairs (partial 18S rDNA) for individual soil-living bacterial-feeding nematode taxa (Acrobeloides buetschlii, Panagrellus redivivus, Plectus velox and Plectus minimus). Primer specificity was tested against more than 100 non-target soil organisms. Further, we determined how long nematode DNA can be traced in the gut of predators. Potential predators were identified in laboratory experiments including nine soil mite (Oribatida, Gamasina and Uropodina) and ten springtail species (Collembola). Finally, the approach was tested under field conditions by analyzing five mite and three collembola species for feeding on the three target nematode species. The results proved the three primer sets to specifically amplify DNA of the respective nematode taxa. Detection time of nematode DNA in predators varied with time of prey exposure. Further, consumption of nematodes in the laboratory varied with microarthropod species. Our field study is the first definitive proof that free-living nematodes are important prey for a wide range of soil microarthropods including those commonly regarded as detritivores. Overall, the results highlight the eminent role of nematodes as prey in soil food webs and for channelling bacterial carbon to higher trophic levels."],["dc.description.sponsorship","German Research Foundation (DFG) [MA 2461/8]"],["dc.identifier.doi","10.1111/j.1600-0706.2013.00872.x"],["dc.identifier.isi","000342754100006"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/32212"],["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","Free-living nematodes as prey for higher trophic levels of forest soil food webs"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]