Oncoids from the river Alz (southern Germany): Tiny ecosystems in a phosphorus-limited environment

Hägele, Daniela; Leinfelder, Reinhold; Grau, Jürke; Burmeister, Ernst-Gerhard; Struck, Ulrich

doi:10.1016/j.palaeo.2005.12.016

Cited by 77 publications

(37 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In fact, it has been suggested that one of the main reasons why there are living microbialites in this region is because stoichiometric nutrient constraints prevent snails and potentially other eukaryotes from effectively grazing the microbialites (Elser et al ., 2005a). Oncolites similar to those found in Cuatro Ciénegas are also actively forming in the German river Alz, where phosphorus levels are extremely low (Hagele et al ., 2006). In Rio Mesquites, phosphorus enrichment experiments have demonstrated significant increases in primary production and biogenic calcification, along with major decreases in biomass C:P and N:P ratios in oncolites after P enrichment (Elser et al ., 2005b).…”

Section: Resultsmentioning

confidence: 99%

Metagenomic and stable isotopic analyses of modern freshwater microbialites in Cuatro Ciénegas, Mexico

Breitbart

Hoare

Nitti

et al. 2009

Environmental Microbiology

192

229

View full text Add to dashboard Cite

Ancient biologically mediated sedimentary carbonate deposits, including stromatolites and other microbialites, provide insight into environmental conditions on early Earth. The primary limitation to interpreting these records is our lack of understanding regarding microbial processes and the preservation of geochemical signatures in contemporary microbialite systems. Using a combination of metagenomic sequencing and isotopic analyses, this study describes the identity, metabolic potential and chemical processes of microbial communities from living microbialites from Cuatro Ciénegas, Mexico. Metagenomic sequencing revealed a diverse, redox-dependent microbial community associated with the microbialites. The microbialite community is distinct from other marine and freshwater microbial communities, and demonstrates extensive environmental adaptation. The microbialite metagenomes contain a large number of genes involved in the production of exopolymeric substances and the formation of biofilms, creating a complex, spatially structured environment. In addition to the spatial complexity of the biofilm, microbial activity is tightly controlled by sensory and regulatory systems, which allow for coordination of autotrophic and heterotrophic processes. Isotopic measurements of the intracrystalline organic matter demonstrate the importance of heterotrophic respiration of photoautotrophic biomass in the precipitation of calcium carbonate. The genomic and stable isotopic data presented here significantly enhance our evolving knowledge of contemporary biomineralization processes, and are directly applicable to studies of ancient microbialites.

show abstract

Section: Resultsmentioning

confidence: 99%

Metagenomic and stable isotopic analyses of modern freshwater microbialites in Cuatro Ciénegas, Mexico

Breitbart

Hoare

Nitti

et al. 2009

Environmental Microbiology

192

229

View full text Add to dashboard Cite

show abstract

“…6B). Comparable oncoids have been reported and described in detail from other rivers and lakes of the Molasse Basin (Schäfer & Stapf 1978, Rott 1991, Hägele et al 2006. Locally, tufa stromatolites cover the stream bottom, which is considered by some ecologists to have a negative impact on the distribution of the highly endangered noble crayfish (Astacus astacus) which still occurs in this region (Schütze in Peršoh 1998).…”

Section: Descriptionmentioning

confidence: 87%

“…With regard to their spherical morphology and concentric growth pattern, movement and rotation of the tufa oncoids does not seem to be a crucial prerequisite (Hägele et al 2006). Nonetheless, occasional flooding events shift and rotate the oncoids in the river Moosach, and cause temporary decline in calcite supersaturation.…”

Section: Descriptionmentioning

confidence: 99%

Geobiology of Stromatolites

Reitner¹,

Quéric²,

Reich³

2008

View full text Add to dashboard Cite

“…12), was sampled for analysis of stable oxygen and carbon isotope geochemistry, using methodology described in Appendix III (online supplement). The results are shown in Of the considerable literature on the stable-oxygen and carbon-isotope chemistry of tufas (Andrews et al, 1993;Andrews, 2006), relatively little is directly related to oncoids (Hagele et al, 2006). Of particular relevance is recent research on modern oncoids in the River Gipping, Ipswich, Suffolk (I.…”

Section: Stable Isotope Geochemistrymentioning

confidence: 90%

“…Conversely, erosion of the channel-bed sediment would have stripped the clasts out of the system and removed them before well-developed overgrowths formed. This is not to say that there was absolutely no sediment movement during the formation of the Purfleet oncoids, as many authors have suggested that clasts need to be turned over regularly to allow formation of the all-enveloping coatings that characterize these carbonates (Hagele et al, 2006).…”

Section: Analysis Of Carbonatesmentioning

confidence: 99%

An enhanced record of MIS 9 environments, geochronology and geoarchaeology: data from construction of the High Speed 1 (London–Channel Tunnel) rail-link and other recent investigations at Purfleet, Essex, UK

Bridgland

Harding²,

Allen

et al. 2013

Proceedings of the Geologists' Association

View full text Add to dashboard Cite

The full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. Abstract: New data from the complex Lower Thames locality at Purfleet, Essex, reinforce the correlation of interglacial deposits there with Marine Isotope Stage (MIS) 9, the second of four postAnglian (MIS 12) interglacials recorded in the river terrace sequence east of London. Arising from various developer-funded archaeologically-driven projects, and primarily the construction of 'High Speed 1' (HS1: formerly the Channel Tunnel Rail Link), the new evidence includes additions to palaeontological knowledge of this interglacial, notably from ostracods and vertebrates, results from isotopic analyses of shell and concretionary carbonates, and the first application of numerical geochronological techniques at Purfleet. These analyses, combined with mutual climatic modelling of the ostracods, confirm that deposition of the fossilferous deposits coincided with interglacial conditions, with similar-to-or warmer-than-present summer temperatures and colder winters, providing a suggestion of greater continentality. OSL and amino-acid racemisation support correlation of the interglacial with MIS 9, whereas the climatic and sedimentological evidence points to correlation with the earliest and warmest substage (MIS 9e). There is also evidence that a greater part of the Purfleet sequence might date from the interglacial, although whether these also represent MIS 9e or later parts of the complex stage cannot be determined. The additional archaeological material is consistent with previous interpretations of a tripartite stratigraphical sequence of lithic traditions: basal Clactonian, above which is Acheulian (handaxe manufacture), followed by one of the earliest British appearances of Levallois technique. ABSTRACTNew data from the complex Lower Thames locality at Purfleet, Essex, reinforce the correlation of interglacial deposits there with Marine Isotope Stage (MIS) 9, the second of four post-Anglian (MIS 12) interglacials recorded in the river terrace sequence east of London. Arising from various developer-funded archaeologically-driven projects, and primarily the construction of 'High Speed 1' (HS1: formerly the Channel Tunnel Rail Link), the new evidence includes additions to palaeontological knowledge of this interglacial, notably from ostracods and vertebrates, results from isotopic analyses of shell and concretionary carbonates, and the first application of geochronological techniques at Purfleet. These analyses, combined with palaeotemperature estimates from the Mutual Ostracod Temperate Range...

show abstract

Oncoids from the river Alz (southern Germany): Tiny ecosystems in a phosphorus-limited environment

Cited by 77 publications

References 27 publications

Metagenomic and stable isotopic analyses of modern freshwater microbialites in Cuatro Ciénegas, Mexico

Metagenomic and stable isotopic analyses of modern freshwater microbialites in Cuatro Ciénegas, Mexico

Geobiology of Stromatolites

An enhanced record of MIS 9 environments, geochronology and geoarchaeology: data from construction of the High Speed 1 (London–Channel Tunnel) rail-link and other recent investigations at Purfleet, Essex, UK

Contact Info

Product

Resources

About