Maraun, Mark

[["dc.bibliographiccitation.artnumber","108"],["dc.bibliographiccitation.journal","Journal of insect science (Online)"],["dc.bibliographiccitation.volume","14"],["dc.contributor.author","Jacquemin, Justine"],["dc.contributor.author","Delsinne, Thibaut"],["dc.contributor.author","Maraun, Mark"],["dc.contributor.author","Leponce, Maurice"],["dc.date.accessioned","2019-07-09T11:41:14Z"],["dc.date.available","2019-07-09T11:41:14Z"],["dc.date.issued","2014"],["dc.description.abstract","Ants of the genus Tatuidris Brown and Kempf (Formicidae: Agroecomyrmecinae) generally occur at low abundances in forests of Central and South America. Their morphological peculiarities, such as mandibular brushes, are presumably linked with specialized predatory habits. Our aims were to (1) assess the Tatuidris abundance in an evergreen premontane forest of Ecuador; (2) detail morphological characteristics and feeding behavior of Tatuidris; and (3) define the position of Tatuidris in the food web. A total of 465 litter samples were collected. For the first time, live Tatuidris individuals were observed. Various potential food sources were offered to them. A nitrogen stable isotope ratio analysis ((15)N/(14)N) was conducted on Tatuidris tatusia, other ants, and common organisms from the leaf-litter mesofauna. We found a relatively high abundance of T. tatusia in the site. Live individuals did not feed on any of the food sources offered, as usually observed with diet specialist ants. The isotope analysis revealed that T. tatusia is one of the top predators of the leaf-litter food web."],["dc.identifier.doi","10.1673/031.014.108"],["dc.identifier.fs","608459"],["dc.identifier.pmid","25199767"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/11871"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/58380"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.relation.issn","1536-2442"],["dc.rights","CC BY 3.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/3.0"],["dc.subject.mesh","Animals"],["dc.subject.mesh","Ants"],["dc.subject.mesh","Carnivory"],["dc.subject.mesh","Ecology"],["dc.subject.mesh","Ecuador"],["dc.subject.mesh","Food Chain"],["dc.subject.mesh","Nitrogen Isotopes"],["dc.subject.mesh","Population Density"],["dc.title","Trophic ecology of the armadillo ant, Tatuidris tatusia, assessed by stable isotopes and behavioral observations."],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","e0189645"],["dc.bibliographiccitation.firstpage","1"],["dc.bibliographiccitation.issue","12"],["dc.bibliographiccitation.journal","PloS one"],["dc.bibliographiccitation.lastpage","20"],["dc.bibliographiccitation.volume","12"],["dc.contributor.author","Haynert, Kristin"],["dc.contributor.author","Kiggen, Mirijam"],["dc.contributor.author","Klarner, Bernhard"],["dc.contributor.author","Maraun, Mark"],["dc.contributor.author","Scheu, Stefan"],["dc.date.accessioned","2019-07-09T11:45:04Z"],["dc.date.available","2019-07-09T11:45:04Z"],["dc.date.issued","2017"],["dc.description.abstract","Mesofauna taxa fill key trophic positions in soil food webs, even in terrestrial-marine boundary habitats characterized by frequent natural disturbances. Salt marshes represent such boundary habitats, characterized by frequent inundations increasing from the terrestrial upper to the marine pioneer zone. Despite the high abundance of soil mesofauna in salt marshes and their important function by facilitating energy and carbon flows, the structure, trophic ecology and habitat-related diet shifts of mesofauna species in natural salt marsh habitats is virtually unknown. Therefore, we investigated the effects of natural disturbance (inundation frequency) on community structure, food web complexity and resource use of soil mesofauna using stable isotope analysis (15N, 13C) in three salt marsh zones. In this intertidal habitat, the pioneer zone is exposed to inundations twice a day, but lower and upper salt marshes are less frequently inundated based on shore height. The mesofauna comprised 86 species / taxa dominated by Collembola, Oribatida and Mesostigmata. Shifts in environmental disturbances influenced the structure of food webs, diversity and density declined strongly from the land to the sea pointing to the importance of increasing levels of inundation frequency. Accordingly, the reduced diversity and density was associated by a simplification of the food web in the pioneer zone as compared to the less inundated lower and upper salt marsh with a higher number of trophic levels. Strong variations in δ15N signatures demonstrated that mesofauna species are feeding at multiple trophic levels. Primary decomposers were low and most mesofauna species functioned as secondary decomposers or predators including second order predators or scavengers. The results document that major decomposer taxa, such as Collembola and Oribatida, are more diverse than previously assumed and predominantly dwell on autochthonous resources of the respective salt marsh zone. The results further suggest that Mesostigmata mostly adopt an intraguild predation lifestyle. The high trophic position of a large number of predators suggests that intraguild predation is of significant importance in salt marsh food webs. Presumably, intraguild predation contributes to stabilizing the salt marsh food web against disturbances."],["dc.identifier.doi","10.1371/journal.pone.0189645"],["dc.identifier.pmid","29240806"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/15029"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/59156"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.relation.issn","1932-6203"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.subject.ddc","570"],["dc.subject.mesh","Animals"],["dc.subject.mesh","Biodiversity"],["dc.subject.mesh","Food Chain"],["dc.subject.mesh","Germany"],["dc.subject.mesh","Humans"],["dc.subject.mesh","Predatory Behavior"],["dc.subject.mesh","Soil"],["dc.subject.mesh","Wetlands"],["dc.title","The structure of salt marsh soil mesofauna food webs - The prevalence of disturbance"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]