Sauer, Daniela

[["dc.bibliographiccitation.firstpage","251"],["dc.bibliographiccitation.journal","Geoderma"],["dc.bibliographiccitation.lastpage","261"],["dc.bibliographiccitation.volume","209-210"],["dc.contributor.author","Georgiadis, Anna"],["dc.contributor.author","Sauer, Daniela"],["dc.contributor.author","Herrmann, Ludger"],["dc.contributor.author","Breuer, Jörn"],["dc.contributor.author","Zarei, Mehdi"],["dc.contributor.author","Stahr, Karl"],["dc.date.accessioned","2017-09-07T11:48:27Z"],["dc.date.available","2017-09-07T11:48:27Z"],["dc.date.issued","2013"],["dc.description.abstract","The soil under savanna woody species is often enriched in nutrients in what is termed an ‘island of fertility'. We tested for positive feedbacks between encroaching woody plants and soil fertility in two co-occurring shrub species at three sites. One of these shrub species is nitrogen-fixing, Acacia mellifera, and the other is non‑nitrogen-fixing, Tarchonanthus camphoratus; we compared these effects to the grasslands surrounding the shrub patches. We found that soil nutrient concentrations were usually related to shrub size rather than the species. Fertile patches developed underneath large shrubs as indicated by higher carbon and nitrogen concentrations, a higher CECeff(especially sodium, which is a limiting nutrient for grazing livestock) and a pH near 6. We found no difference in soil nitrogen between the N-fixing A. mellifera and T. camphoratus. Plant cover under large shrubs was less than in open grassland. There are ‘islands of fertility' under large shrubs. However, the development of fertility islands did not facilitate understorey growth. Thus, increased soil fertility had no positive feedback on overall vegetation composition. Negative effects of the woody vegetation may override the positive effects of increased soil nutrient availability."],["dc.identifier.doi","10.1016/j.geoderma.2013.06.023"],["dc.identifier.gro","3149467"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6145"],["dc.language.iso","en"],["dc.notes.intern","Sauer Crossref Import"],["dc.notes.status","public"],["dc.notes.submitter","chake"],["dc.relation.issn","0016-7061"],["dc.relation.orgunit","Abteilung Ökosystemmodellierung"],["dc.subject.gro","Acacia"],["dc.subject.gro","Carbon"],["dc.subject.gro","Fertility islands"],["dc.subject.gro","Legumes"],["dc.subject.gro","Nitrogen"],["dc.subject.gro","Senegalia"],["dc.subject.gro","Tarchonanthus"],["dc.subject.gro","pH"],["dc.title","Development of a method for sequential Si extraction from soils"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","no"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","392"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Soil Research"],["dc.bibliographiccitation.volume","53"],["dc.contributor.author","Georgiadis, Anna"],["dc.contributor.author","Sauer, Daniela"],["dc.contributor.author","Breuer, Jörn"],["dc.contributor.author","Herrmann, Ludger"],["dc.contributor.author","Rennert, Thilo"],["dc.contributor.author","Stahr, Karl"],["dc.date.accessioned","2017-09-07T11:48:26Z"],["dc.date.available","2017-09-07T11:48:26Z"],["dc.date.issued","2015"],["dc.identifier.doi","10.1071/sr14171"],["dc.identifier.gro","3149452"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6128"],["dc.notes.intern","Sauer Crossref Import"],["dc.notes.status","public"],["dc.notes.submitter","chake"],["dc.publisher","CSIRO Publishing"],["dc.relation.issn","1838-675X"],["dc.title","Optimising the extraction of amorphous silica by NaOH from soils of temperate-humid climate"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","645"],["dc.bibliographiccitation.firstpage","645"],["dc.bibliographiccitation.issue","7"],["dc.bibliographiccitation.journal","Soil Research"],["dc.bibliographiccitation.lastpage","657"],["dc.bibliographiccitation.volume","52"],["dc.contributor.author","Georgiadis, Anna"],["dc.contributor.author","Sauer, Daniela"],["dc.contributor.author","Herrmann, Ludger"],["dc.contributor.author","Breuer, Jörn"],["dc.contributor.author","Zarei, Mehdi"],["dc.contributor.author","Stahr, Karl"],["dc.date.accessioned","2017-09-07T11:48:28Z"],["dc.date.available","2017-09-07T11:48:28Z"],["dc.date.issued","2014"],["dc.description.abstract","The importance of silicon (Si) compounds in agriculture and geochemical cycles has received increasing attention over the last decade; however, quantitative data on non-crystalline pedogenic Si phases in soils are still rare. Recently, the authors developed a method for sequential Si extraction from soils, in order to improve the quantification of different Si compounds in soils. The method has been tested on samples of known composition. Here, the method is applied for the first time to complete soil profiles. Six different soil types from south-west Germany that have developed since the end of the last glacial period were selected. Most of the Si in these soils was bound in primary and secondary silicates. In mineral soil horizons, the second-highest proportion of Si was in precipitates of amorphous silica (minerogenic amorphous silica), whereas in some O horizons, the second-most important Si fraction was in biogenic amorphous silica. Topsoil horizons and clayey subsoil horizons of a Luvisol and a Stagnosol especially accumulate amorphous silica. Silicon from bio-opal contributed up to 14% to the total Si in Oa horizons of the studied soils. The smallest amounts of Si were found in the mobile and adsorbed Si fractions. Some methodological limitations are identified and discussed; however, the new sequential method of Si extraction enabled separation of different Si fractions in typical soils of a temperate–humid climate."],["dc.identifier.doi","10.1071/sr14016"],["dc.identifier.gro","3149462"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6139"],["dc.language.iso","en"],["dc.notes.intern","Sauer Crossref Import"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.issn","1838-675X"],["dc.title","Testing a new method for sequential silicon extraction on soils of a temperate - humid climate"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]