Self-organization of dissolved organic matter to micelle-like microparticles in river water

Kerner, Martin; Hohenberg, Heinz; Ertl, Siegmund; Reckermann, Marcus; Spitzy, Alejandro

doi:10.1038/nature01469

Cited by 167 publications

(116 citation statements)

References 21 publications

Supporting

Mentioning

103

Contrasting

Unclassified

Order By: Relevance

“…Both DOM and POM are composed of aggregated colloids, organic filaments, cell fragments, and microbial biomass (e.g., algae and bacteria) (Ranville and Schmiermund, 1998). POM may form from the aggregation of DOM (Kerner et al, 2003). The preferential presence of large particles (>20 µm) after re-wetting and generally higher POC concentrations in the zone of intensive dry / wet cycles suggest that POM of this study mainly originated from the mechanical ablation of the peat.…”

Section: Particulate Organic Matter and Dissolved Organic Matter -Twimentioning

confidence: 72%

“…Up to date most studies on carbon concentrations in pore waters of Histosols have concentrated on DOC and DIC (Billett et al, 2004;Worrall et al, 2005;Fiedler et al, 2006) and POC seems to be a forgotten component. However, studies of POC in aquatic systems highlight peatlands as a major POC source to the adjacent aquatic systems (Bouchard, 2007;Dawson et al, 2004;Laudon et al, 2004). It is known that significant amounts of POC moving from peatlands are derived from the erosion of exposed peat (Pawson et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Particulate organic carbon (POC) in relation to other pore water carbon fractions in drained and rewetted fens in Southern Germany

et al. 2008

View full text Add to dashboard Cite

Abstract. Numerous studies have dealt with carbon (C) contents in Histosols, but there are no studies quantifying the relative importance of the individual C components in pore waters. For this study, measurements were taken of all the carbon components (particulate organic carbon, POC; dissolved organic carbon, DOC; dissolved inorganic carbon, DIC; dissolved methane, CH 4 ) in the soil pore water of calcareous fens under three different water management regimes (rewetted, deeply and moderately drained). Pore water was collected weekly or biweekly (April 2004 to April 2006 at depths between 10 and 150 cm.The main results obtained were:(1) DIC (94-280 mg C l −1 ) was the main C-component. (2) POC and DOC concentrations in the pore water (14-125 mg C l −1 vs. 41-95 mg C l −1 ) were pari passu. (3) Dissolved CH 4 was the smallest C component (0.005-0.9 mg C l −1 ). Interestingly, about 30% of the POM particles were colonized by microbes indicating that they are active in the internal C turnover. Certainly, both POC and DOC fractions are essential components of the C budget of peatlands. Furthermore, dissolved CO 2 in all forms of DIC appears to be an important part of peatland C-balance.

show abstract

Section: Particulate Organic Matter and Dissolved Organic Matter -Twimentioning

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Particulate organic carbon (POC) in relation to other pore water carbon fractions in drained and rewetted fens in Southern Germany

et al. 2008

View full text Add to dashboard Cite

show abstract

“…the formation of transparent exopolymer particles (TEP) (Mopper et al 1995, Zhou et al 1998, Chin et al 1998, Kerner et al 2003, Verdugo et al 2004, Engel et al 2004). …”

Section: Accepted M Manuscriptmentioning

confidence: 99%

A novel protocol for determining the concentration and composition of sugars in particulate and in high molecular weight dissolved organic matter (HMW-DOM) in seawater

2011

View full text Add to dashboard Cite

Please cite this article as: Engel, Anja, Händel, Nicole, A novel protocol for determining the concentration and composition of sugars in particulate and in high molecular weight dissolved organic matter (HMW-DOM) in seawater, Marine Chemistry (2011Chemistry ( ), doi: 10.1016Chemistry ( /j.marchem.2011 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Here, we show that desalting by membrane dialysis (1kDa) is an efficient alternative to ion exchange resins and yields recoveries of >90% for HMW carbohydrates. We conducted several tests to determine the accuracy and reproducibility of the method. Sugar concentrations determined with our protocol were compared to results obtained with the colorimetric TPTZ-method, and with earlier HPAEC-PAD protocols using cation/ anion exchange resins. Applications of our protocol to field samples indicated that acidic sugars can comprise a substantial fraction (30-50%) of HMW dissolved carbohydrates in seawater.The simultaneous analysis of the three classes of sugars appears promising to detect a larger fraction of marine combined carbohydrates, and thus to improve our understanding of organic matter cycling in the ocean.

show abstract

“…isms (Barbeau and Moffett, 2001;Kerner et al, 2003) have so far not been considered in field studies, but would also need to be further evaluated as biological amplifiers of coagulation.…”

Section: Sources Of Transparent Exopolymeric Particles and Acidic Polmentioning

confidence: 99%

Thorium speciation in seawater

et al. 2006

View full text Add to dashboard Cite

Since the 1960s, thorium isotopes occupy a special place in the oceanographer's toolbox as tracers for determining rates and mechanisms of oceanic scavenging, particle dynamics, and carbon fluxes. Due to their unique and constant production rates from soluble parent nuclides of uranium and radium, their disequilibrium can be used to calculate rates and time scales of sinking particles. In addition, by ratio-ing particulate 234 Th (as well, in principle, other Th-nuclides) to carbon (and other elements), and linking this ratio to the parent-daughter disequilibrium in the water column, it is possible to calculate fluxes of carbon and other elements. Most of these applications are possible with little knowledge of the dissolved chemical properties of thorium, other than its oxidation state (IV) and tendency to strongly sorb to surfaces, i.e., its bparticle-or surface-activityQ. However, the use of any tracer is hindered by a lack of knowledge of its chemical properties. Recent observations in the variability of carbon to 234 Th ratios in different particle types, as well as of associations of Th(IV) with various marine organic biomolecules has led to the need for a review of current knowledge and what future endeavors should be taken to understand the marine chemistry of thorium. D

show abstract

Self-organization of dissolved organic matter to micelle-like microparticles in river water

Cited by 167 publications

References 21 publications

Particulate organic carbon (POC) in relation to other pore water carbon fractions in drained and rewetted fens in Southern Germany

Particulate organic carbon (POC) in relation to other pore water carbon fractions in drained and rewetted fens in Southern Germany

A novel protocol for determining the concentration and composition of sugars in particulate and in high molecular weight dissolved organic matter (HMW-DOM) in seawater

Thorium speciation in seawater

Contact Info

Product

Resources

About