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You searched for: Journal name Biogeochemistry Remove constraint Journal name: Biogeochemistry Publication year rev 7990-2010 Remove constraint Publication year rev: 7990-2010 Subject term dissolved organic carbon Remove constraint Subject term: dissolved organic carbon
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1. Biodegradability continuum and biodegradation kinetics of natural organic matter described by the beta distribution

Author:
Vähätalo, Anssi V.; Aarnos, Hanna; Mäntyniemi, Samu
Source:
Biogeochemistry 2010 v.100 no.1-3 pp. 227-240
ISSN:
0168-2563
Subject:
sediments; mineralization; probability; lakes; models; bioassays; dissolved organic carbon; biodegradation; biodegradability; prediction
Abstract:
... We followed a long-term (up to 503 days) microbial mineralization of dissolved organic carbon (DOC) from lake water in a bioassay and described the kinetics of biodegradation with a new model based on a reactivity continuum approach. The biodegradability of DOC was expressed as the probability of biodegradation, which was assumed to follow a beta distribution. We compared the performance of our be ...
DOI:
10.1007/s10533-010-9419-4

2. Changes in water colour between 1986 and 2006 in the headwaters of the River Nidd, Yorkshire, UK

Author:
Chapman, Pippa J.; McDonald, Adrian T.; Tyson, Rosa; Palmer, Sheila M.; Mitchell, Gordon; Irvine, Brian
Source:
Biogeochemistry 2010 v.101 no.1-3 pp. 281-294
ISSN:
0168-2563
Subject:
adsorption; biogeochemistry; color; dissolved organic carbon; hydrochemistry; mineral soils; pH; peat; rivers; runoff; silicon; soil horizons; statistical analysis; subwatersheds; sulfur; temporal variation; England
Abstract:
... This study compares the spatial and temporal variability of water colour for fifteen sub-catchments of the River Nidd, northeast England, in 1986 and 2006/2007. Between 1986 and 2006/2007, mean annual water colour increased in all the sub-catchments. However, there was considerable variation in the increase, which ranged from 22 to 155%. Statistical analysis revealed that the sub-catchments could ...
DOI:
10.1007/s10533-010-9474-x

3. Dissolved organic carbon concentrations in runoff from shallow heathland catchments: effects of frequent excessive leaching in summer and autumn

Author:
Haaland, S.; Mulder, J.
Source:
Biogeochemistry 2010 v.97 no.1 pp. 45-53
ISSN:
0168-2563
Subject:
adsorption; autumn; carbon dioxide; dissolved organic carbon; growing season; heathlands; leaching; mountain soils; organic soils; runoff; soil organic matter; soil water; summer; temperature; water flow; watersheds; Norway
Abstract:
... Transport and turnover of dissolved organic carbon (DOC) is important in the C cycle of organic soils. The concentration of DOC in soil water is buffered by adsorption to the soil matrix, and has been hypothesized to depend on the pool size of adsorbed DOC. We have studied the effect of frequent artificial excessive leaching events on concentration and flux of DOC in shallow, organic rich mountain ...
DOI:
10.1007/s10533-009-9373-1

4. Effect of pH and dissolved organic matter on the abundance of nirK and nirS denitrifiers in spruce forest soil

Author:
Bárta, Jiří; Melichová, Tereza; Vaněk, Daniel; Picek, Tomáš; Šantrůčková, Hana
Source:
Biogeochemistry 2010 v.101 no.1-3 pp. 123-132
ISSN:
0168-2563
Subject:
biogeochemistry; denitrifying bacteria; dissolved organic carbon; forest soils; forests; genes; humus; leaching; nitrates; nitrogen; nutrients; pH; quantitative polymerase chain reaction; soil acidification; soil sampling
Abstract:
... Acid N depositions in the Bohemian Forest during the second half of the last century caused enormous soil acidification which led to the leaching of essential nutrients including nitrates. We investigated the effect of dissolved organic matter (DOM) and pH on the abundance of 16S RDNA, nirK and nirS gene copies in four spruce forest sites. Soil samples for molecular based quantification (qPCR) wer ...
DOI:
10.1007/s10533-010-9430-9

5. Effects of storm events on mobilisation and in-stream processing of dissolved organic matter (DOM) in a Welsh peatland catchment

Author:
Austnes, Kari; Evans, Christopher D.; Eliot-Laize, Caroline; Naden, Pamela S.; Old, Gareth H.
Source:
Biogeochemistry 2010 v.99 no.1-3 pp. 157-173
ISSN:
0168-2563
Subject:
Sphagnum; absorbance; biogeochemistry; dissolved organic carbon; dissolved organic nitrogen; diurnal variation; factor analysis; fluorescence; pH; peatlands; soil water; statistical models; storms; streams; watersheds
Abstract:
... Peatlands are important contributors of dissolved organic matter (DOM) to downstream aquatic systems. We investigated the effects of storm events on dissolved organic carbon (DOC) concentrations and DOM quality in a stream draining a Welsh peatland catchment. Intensive stream samples were collected and analysed for pH, DOC, dissolved organic nitrogen (DON), absorbance and fluorescence. Soil water ...
DOI:
10.1007/s10533-009-9399-4

6. Event controlled DOC export from forested watersheds

Author:
Raymond, Peter A.; Saiers, James E.
Source:
Biogeochemistry 2010 v.100 no.1-3 pp. 197-209
ISSN:
0168-2563
Subject:
biogeochemistry; climate; dissolved organic carbon; ecosystems; forested watersheds; hydrograph; melting; snowmelt; storms; streams; temperature; wetlands; Eastern United States
Abstract:
... We performed a meta-data analysis to investigate the importance of event based fluxes to DOC export from forested watersheds. A total of 30 small eastern United States forested watersheds with no wetland component, with a total of 5,176 DOC and accompanying discharge measurements were used in this analysis. There is a clear increase in DOC concentration during hydrologic events (storms and snow me ...
DOI:
10.1007/s10533-010-9416-7

7. High precipitation causes large fluxes of dissolved organic carbon and nitrogen in a subtropical montane Chamaecyparis forest in Taiwan

Author:
Schmidt, Bettina H. M.; Wang, Chiao-Ping; Chang, Shih-Chieh; Matzner, Egbert
Source:
Biogeochemistry 2010 v.101 no.1-3 pp. 243-256
ISSN:
0168-2563
Subject:
Chamaecyparis obtusa var. formosana; biogeochemistry; dissolved organic carbon; forest ecosystems; forest litter; forest soils; forests; nitrogen; nitrogen content; seepage; throughfall; Taiwan
Abstract:
... Fluxes of dissolved organic carbon (DOC) and nitrogen (DON) may play an important role for losses of C and N from the soils of forest ecosystems, especially under conditions of high precipitation. We studied DOC and DON fluxes and concentrations in relation to precipitation intensity in a subtropical montane Chamaecyparis obtusa var. formosana forest in Taiwan. Our objective was, to quantify DOC a ...
DOI:
10.1007/s10533-010-9470-1

8. Identifying sources of dissolved organic carbon in agriculturally dominated rivers using radiocarbon age dating: Sacramento-San Joaquin River Basin, California

Author:
Sickman, James O.; DiGiorgio, Carol L.; Lee Davisson, M.; Lucero, Delores M.; Bergamaschi, Brian
Source:
Biogeochemistry 2010 v.99 no.1-3 pp. 79-96
ISSN:
0168-2563
Subject:
land use change; clay fraction; radionuclides; rivers; agricultural land; landscapes; soil organic matter; soil stabilization; watersheds; carbon sinks; agrochemicals; adsorbents; dissolved organic carbon; hydrophobicity; urbanization; statistical models; Sacramento River; San Joaquin River; California
Abstract:
... We used radiocarbon measurements of dissolved organic carbon (DOC) to resolve sources of riverine carbon within agriculturally dominated landscapes in California. During 2003 and 2004, average Δ¹⁴C for DOC was −254‰ in agricultural drains in the Sacramento-San Joaquin Delta, −218‰ in the San Joaquin River, −175‰ in the California State Water Project and −152‰ in the Sacramento River. The age of bu ...
DOI:
10.1007/s10533-009-9391-z

9. Influences of dissolved organic carbon on stream water chemistry in two forested catchments in central Sweden

Author:
Norström, Sara H.; Vestin, Jenny L. K.; Bylund, Dan; Lundström, Ulla S.
Source:
Biogeochemistry 2010 v.101 no.1-3 pp. 229-241
ISSN:
0168-2563
Subject:
aluminum; biogeochemistry; calcium; cations; dissolved organic carbon; drainage; forested watersheds; growing season; hydrochemistry; iron; lactic acid; magnesium; molecular weight; pH; stream channels; wetlands; Sweden
Abstract:
... Stream water chemistry in two headwater streams draining two small, adjacent catchments in Bispgården, central Sweden was studied during the 2003 and 2004 growing seasons. The two catchments closely resemble each other in regard to size, shape and drainage density, with the major difference found in the area of wetland lining the streambeds. The emphasis of the study was to investigate the stream ...
DOI:
10.1007/s10533-010-9469-7

10. Instream release of dissolved organic matter from coarse and fine particulate organic matter of different origins

Author:
Yoshimura, Chihiro; Fujii, Manabu; Omura, Tatsuo; Tockner, Klement
Source:
Biogeochemistry 2010 v.100 no.1-3 pp. 151-165
ISSN:
0168-2563
Subject:
microscopy; particulate organic matter; leaching; feces; carbon cycle; regression analysis; shredding; Gammarus; dissolved organic carbon; streams; lignin
Abstract:
... Dissolved organic matter (DOM), produced through leaching from particulate organic matter (POM), is an essential component of the carbon cycle in streams. The present study investigated the instream DOM release from POM, varying in size and chemical quality. We produced large and medium sized fine particulate organic matter (L-FPOM, 250-500 μm; M-FPOM, 100-250 μm) of defined quality by feeding fiv ...
DOI:
10.1007/s10533-010-9412-y

11. Linking monitoring and modelling: can long-term datasets be used more effectively as a basis for large-scale prediction

Author:
Evans, Chris D.; Cooper, David M.; Monteith, Donald T.; Helliwell, Rachel C.; Moldan, Filip; Hall, Jane; Rowe, Edwin C.; Cosby, Bernard J.
Source:
Biogeochemistry 2010 v.101 no.1-3 pp. 211-227
ISSN:
0168-2563
Subject:
biogeochemistry; data collection; dissolved organic carbon; highlands; issues and policy; lakes; landscapes; models; monitoring; neutralization; nitrates; prediction; solutes; sulfates; surface water; surveys; United Kingdom
Abstract:
... Data from long-term monitoring sites are vital for biogeochemical process understanding, and for model development. Implicitly or explicitly, information provided by both monitoring and modelling must be extrapolated in order to have wider scientific and policy utility. In many cases, large-scale modelling utilises little of the data available from long-term monitoring, instead relying on simplifi ...
DOI:
10.1007/s10533-010-9413-x

12. Seasonal variation of water extractable aluminium forms in acidified forest organic soils under different vegetation cover

Author:
Tejnecký, Václav; Drábek, Ondřej; Borůvka, Luboš; Nikodem, Antonín; Kopáč, Jan; Vokurková, Petra; Šebek, Ondřej
Source:
Biogeochemistry 2010 v.101 no.1-3 pp. 151-163
ISSN:
0168-2563
Subject:
Fagus; acidification; aluminum; biogeochemistry; dissolved organic carbon; forest soils; forests; mountains; organic soils; pH; seasonal variation; soil horizons; vegetation cover
Abstract:
... The Jizera Mountains area is affected by natural and anthropogenic acidification processes. The effect of acidification is reflected by presence of elevated amount of different Al forms in soil horizons. Changes of water extractable forms of Al (total [graphic removed] , species: Al(X)¹⁺, Al(Y)²⁺ and Al³⁺) and other soil characteristics (e.g. DOC, pH) were investigated in forest soils from April t ...
DOI:
10.1007/s10533-010-9450-5

13. Short-term responses of ecosystem carbon fluxes to experimental soil warming at the Swiss alpine treeline

Author:
Hagedorn, Frank; Martin, Melissa; Rixen, Christian; Rusch, Silvan; Bebi, Peter; Zürcher, Alois; Siegwolf, Rolf T. W.; Wipf, Sonja; Escape, Christophe; Roy, Jacques; Hättenschwiler, Stephan
Source:
Biogeochemistry 2010 v.97 no.1 pp. 7-19
ISSN:
0168-2563
Subject:
carbon dioxide; mineralization; plant growth; shrubs; soil temperature; heat; leaching; soil heating; global warming; growing season; dissolved organic carbon; ecosystems; latitude; altitude; soil respiration; soil water; treeline; shoots
Abstract:
... Climatic warming will probably have particularly large impacts on carbon fluxes in high altitude and latitude ecosystems due to their great stocks of labile soil C and high temperature sensitivity. At the alpine treeline, we experimentally warmed undisturbed soils by 4 K for one growing season with heating cables at the soil surface and measured the response of net C uptake by plants, of soil resp ...
DOI:
10.1007/s10533-009-9297-9

14. Sources and ages of dissolved organic matter in peatland streams: evidence from chemistry mixture modelling and radiocarbon data

Author:
Tipping, E.; Billett, M. F.; Bryant, C. L.; Buckingham, S.; Thacker, S. A.
Source:
Biogeochemistry 2010 v.100 no.1-3 pp. 121-137
ISSN:
0168-2563
Subject:
peat; radionuclides; winter; mixing; monitoring; calcium; models; peatlands; clay; spring; streams; dissolved organic carbon; biogeochemistry; groundwater; England
Abstract:
... Monitoring data over the period 1994-2007 were analysed for three streams (Cottage Hill Sike, CHS; Rough Sike, RS; Trout Beck, TB) draining blanket peat underlain by glacial clay and limestone-rich sub-strata at Moor House (Northern England). Dissolved organic carbon concentration, [DOC], showed complex relationships with both discharge and calcium concentration, [Ca]. A model based on [Ca] was co ...
DOI:
10.1007/s10533-010-9409-6

15. Variable flushing mechanisms and landscape structure control stream DOC export during snowmelt in a set of nested catchments

Author:
Pacific, Vincent J.; Jencso, Kelsey G.; McGlynn, Brian L.
Source:
Biogeochemistry 2010 v.99 no.1-3 pp. 193-211
ISSN:
0168-2563
Subject:
biogeochemistry; dissolved organic carbon; groundwater; highlands; landscapes; riparian areas; snowmelt; streams; watersheds; wetlands; Montana; Rocky Mountain region
Abstract:
... Stream DOC dynamics during snowmelt have been the focus of much research, and numerous DOC mobilization and delivery mechanisms from riparian and upland areas have been proposed. However, landscape structure controls on DOC export from riparian and upland landscape elements remains poorly understood. We investigated stream and groundwater DOC dynamics across three transects and seven adjacent but ...
DOI:
10.1007/s10533-009-9401-1

16. Vertical change in dissolved organic carbon and oxygen at the water table region of an aquifer recharged with stormwater: biological uptake or mixing

Author:
Foulquier, Arnaud; Malard, Florian; Mermillod-Blondin, Florian; Datry, Thibault; Simon, Laurent; Montuelle, Bernard; Gibert, Janine
Source:
Biogeochemistry 2010 v.99 no.1-3 pp. 31-47
ISSN:
0168-2563
Subject:
aerobiosis; aquifers; biodegradability; biogeochemistry; dissolved organic carbon; dissolved oxygen; filtration; groundwater; mixing; oxygen; rain; sediments; stormwater; vadose zone; water table
Abstract:
... Decreases in dissolved organic carbon (DOC) and dissolved oxygen (DO) with increasing depth below the groundwater table are often considered as evidence for aerobic respiration; however, they may reflect mixing of infiltrating water and groundwater. We found that groundwater DOC concentration was on average 0.3 mg C l⁻¹ higher and DO concentration 1.5 mg O₂ l⁻¹ lower at recharge sites replenished ...
DOI:
10.1007/s10533-009-9388-7