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You searched for: Journal Biogeochemistry Remove constraint Journal: Biogeochemistry Subject dissolved organic carbon Remove constraint Subject: dissolved organic carbon
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1. Bark controls tree branch-leached dissolved organic matter production and bioavailability in a subtropical forest

Author:
Jia-Wen Xu; Na Yang; Fu-Xi Shi; Yun Zhang; Songze Wan; Rong Mao
Source:
Biogeochemistry 2022 v.158 no.3 pp. 345-355
ISSN:
0168-2563
Subject:
bark; bioavailability; biogeochemistry; broadleaved trees; debarking; dissolved organic carbon; total nitrogen; total phosphorus; tropical forests; China
Abstract:
... Bark is an essential component of tree branches, yet its role in controlling branch-leached dissolved organic matter (DOM) characteristics remains unknown in forests. Here, we collected branches (about 1.5 cm in diameter) of two evergreen coniferous trees, two deciduous broadleaf trees, and three evergreen broadleaf trees from a subtropical forest in southern China, and subsequently used a bark re ...
DOI:
10.1007/s10533-022-00902-2

2. Carbon and nutrients regulate greenhouse gas fluxes from oxic stream sediments

Author:
Nolan J. T. Pearce; Jessica M. Dyczko; Marguerite A. Xenopoulos
Source:
Biogeochemistry 2022 v.160 no.2 pp. 275-287
ISSN:
0168-2563
Subject:
biogeochemistry; carbon dioxide; dissolved organic carbon; greenhouse gases; greenhouses; land use change; sediments; streams; Ontario
Abstract:
... Streams play a significant role in global biogeochemical cycles and are usually sources of greenhouse gasses to the atmosphere. To better understand controls on greenhouse gas production from stream sediments and their contribution to whole stream greenhouse gas evasion, we estimated fluxes of CO₂, CH₄, and N₂O from 48 streams in southern Ontario, Canada that represented a gradient in both the amo ...
DOI:
10.1007/s10533-022-00955-3

3. Clarifying the fate of dissolved organic carbon in turbid glacier meltwater rivers in Svalbard via a series of incubations

Author:
Zhuo-Yi Zhu
Source:
Biogeochemistry 2022 v.159 no.3 pp. 337-352
ISSN:
0168-2563
Subject:
biodegradation; coasts; dissolved organic carbon; glaciers; global carbon budget; photolysis; seawater; snowmelt; summer; water currents; Arctic Ocean; Arctic region; Greenland; Norway
Abstract:
... The dissolved organic carbon (DOC) of Svalbard’s glacier meltwater has received limited attention. Due to the northward ocean current, terrestrial DOC output from Svalbard eventually enters the Arctic Ocean, rather than travelling southward into the Atlantic. This makes the role of Svalbard glaciers in the Arctic marine carbon budget significantly different from that of Greenland glaciers. Field w ...
DOI:
10.1007/s10533-022-00931-x

4. Decomposition of carbon adsorbed on iron (III)-treated clays and their effect on the stability of soil organic carbon and external carbon inputs

Author:
Mengyang You; Xia Zhu-Barker; Timothy A. Doane; William R. Horwath
Source:
Biogeochemistry 2022 v.157 no.2 pp. 259-271
ISSN:
0168-2563
Subject:
Lolium; Luvisols; adsorption; biogeochemistry; carbon dioxide; clay; dissolved organic carbon; iron; kaolinite; mineralization; montmorillonite; plant residues; soil organic carbon
Abstract:
... The interaction of organic carbon (OC) with clay and metals stabilizes soil carbon (C), but the influence of specific clay-metal-OC assemblages (flocs) needs further evaluation. This study aimed to investigate the stability of flocs in soil as affected by external C inputs. Flocs representing OC-mineral soil fractions were synthesized using dissolved organic C (DOC) combined with kaolinite (1:1 la ...
DOI:
10.1007/s10533-021-00873-w

5. Molecular correlations of dissolved organic matter with inorganic mercury and methylmercury in Canadian boreal streams

Author:
V. Mangal; W. Y. Lam; H. Huang; E. J. S. Emilson; R. W. Mackereth; C. P. J. Mitchell
Source:
Biogeochemistry 2022 v.160 no.1 pp. 127-144
ISSN:
0168-2563
Subject:
biochemical compounds; biogeochemistry; boreal forests; conifers; dissolved organic carbon; lignin; mass spectrometry; mercury; methylmercury compounds; nitrogen; spring; sulfur; thermodynamics; throughfall; Canada
Abstract:
... The molecular composition of dissolved organic matter (DOM) is increasingly recognized as fundamentally important to mercury transport and transformations, with numerous approaches undertaken to examine DOM characteristics beyond dissolved organic carbon concentrations. In this study, we use a high-resolution mass spectrometry approach, Fourier-transform ion cyclotron resonance mass spectrometry, ...
DOI:
10.1007/s10533-022-00944-6

6. Production of dissolved carbon and alkalinity during macroalgal wrack degradation on beaches: a mesocosm experiment with implications for blue carbon

Author:
Anita K. Perkins; Isaac R. Santos; Andrew L. Rose; Kai G. Schulz; Hans-Peter Grossart; Bradley D. Eyre; Brendan P. Kelaher; Joanne M. Oakes
Source:
Biogeochemistry 2022 v.160 no.2 pp. 159-175
ISSN:
0168-2563
Subject:
Ecklonia radiata; alkalinity; ammonification; bicarbonates; blue carbon; carbon dioxide; carbon sequestration; carbonates; detritus; dissolved inorganic carbon; dissolved organic carbon; macroalgae; sulfates
Abstract:
... Marine macroalgae are a key primary producer in coastal ecosystems, but are often overlooked in blue carbon inventories. Large quantities of macroalgal detritus deposit on beaches, but the fate of wrack carbon (C) is little understood. If most of the wrack carbon is respired back to CO₂, there would be no net carbon sequestration. However, if most of the wrack carbon is converted to bicarbonate (a ...
DOI:
10.1007/s10533-022-00946-4

7. Small rain events during drought alter sediment dissolved organic carbon leaching and respiration in intermittent stream sediments

Author:
Laura E. Coulson; Gabriele Weigelhofer; Stephanie Gill; Thomas Hein; Christian Griebler; Jakob Schelker
Source:
Biogeochemistry 2022 v.159 no.2 pp. 159-178
ISSN:
0168-2563
Subject:
bacterial communities; biofilm; biogeochemistry; carbon dioxide; climate change; community structure; dissolved organic carbon; drought; enzyme activity; ephemeral streams; fluorescence; hyporheic zone; rain; risk; rivers; sediments; stream channels; stream flow; tryptophan; water content
Abstract:
... With climate change, streams and rivers are at increased risk of droughts and flow intermittency. The full implications of these conditions for fluvial carbon (C) processing and stream-atmosphere CO₂ emissions are not well understood. We performed a controlled drought experiment in outdoor hyporheic flumes. We simulated small rain events that increase sediment moisture content, but do not cause st ...
DOI:
10.1007/s10533-022-00919-7

8. Bacterial consumption of total and dissolved organic carbon in the Great Barrier Reef

Author:
Cátia Carreira; Sam Talbot; Christian Lønborg
Source:
Biogeochemistry 2021 v.154 no.3 pp. 489-508
ISSN:
0168-2563
Subject:
bacterial biomass; bacterial growth; bioavailability; dissolved organic carbon; molecular weight; particulate organic carbon; primary productivity; total organic carbon; Great Barrier Reef
Abstract:
... Heterotrophic bacteria typically take up directly dissolved organic matter due to the small molecular size, although both particulate and dissolved organic matter have labile (easily consumed) compounds. Tropical coastal waters are important ecosystems because of their high productivity. However, few studies have determined bacterial cycling (i.e. carbon uptake by bacteria and allocation for bacte ...
DOI:
10.1007/s10533-021-00802-x

9. Bioavailable DOC: reactive nutrient ratios control heterotrophic nutrient assimilation—An experimental proof of the macronutrient-access hypothesis

Author:
Daniel Graeber; Youngdoung Tenzin; Marc Stutter; Gabriele Weigelhofer; Tom Shatwell; Wolf von Tümpling; Jörg Tittel; Alexander Wachholz; Dietrich Borchardt
Source:
Biogeochemistry 2021 v.155 no.1 pp. 1-20
ISSN:
0168-2563
Subject:
ammonium nitrogen; bacterial biomass; bioavailability; biogeochemistry; dissolved organic carbon; dissolved organic nitrogen; fluorescent dyes; freshwater; heterotrophs; inoculum; leachates; leaves; nitrate nitrogen; nitrite nitrogen; nutrient uptake; reactive phosphorus; stoichiometry; streams; uncertainty
Abstract:
... We investigate the "macronutrient-access hypothesis", which states that the balance between stoichiometric macronutrient demand and accessible macronutrients controls nutrient assimilation by aquatic heterotrophs. Within this hypothesis, we consider bioavailable dissolved organic carbon (bDOC), reactive nitrogen (N) and reactive phosphorus (P) to be the macronutrients accessible to heterotrophic a ...
DOI:
10.1007/s10533-021-00809-4

10. Biogeochemical causes of sixty-year trends and seasonal variations of river water properties in a large European basin

Author:
Jiří Kopáček; Josef Hejzlar; Petr Porcal; Petr Znachor
Source:
Biogeochemistry 2021 v.154 no.1 pp. 81-98
ISSN:
0168-2563
Subject:
acid deposition; acidity; agricultural land; air pollution; algae; basins; biogeochemistry; calcium; carbon dioxide; chlorophyll; climate; dissolved organic carbon; eutrophication; laws and regulations; pH; phosphorus; river water; temperature profiles; wastewater; wastewater treatment; water temperature; Czech Republic
Abstract:
... We evaluated long-term trends and seasonal variations in the major physical–chemical properties of the circum-neutral Slapy reservoir (Vltava, Czech Republic) from 1960 to 2019. Mean annual water temperature increased by 2.1 °C, flow maxima shifted by ~ 13 days from the early April to mid-March, and the onset of thermal stratification of water column and spring algal peaks advanced by 19 and 21 da ...
DOI:
10.1007/s10533-021-00800-z

11. Development of energetic and enzymatic limitations on microbial carbon cycling in soils

Author:
Hannah R. Naughton; Marco Keiluweit; Malak M. Tfaily; James J. Dynes; Tom Regier; Scott Fendorf
Source:
Biogeochemistry 2021 v.153 no.2 pp. 191-213
ISSN:
0168-2563
Subject:
biodegradation; climate change; dissolved organic carbon; enzyme inhibition; ferrihydrite; global carbon budget; highlands; land use; microbial carbon; nitrates; oxidation; oxygen; phenolic compounds; soil organic carbon; sulfates; upland soils
Abstract:
... Soil organic carbon (SOC) constitutes an important reservoir in the global carbon cycle that is vulnerable to transformation and loss from land use and climate change. Anoxic conditions protect SOC from microbial degradation through limiting the energetics of respiration and inhibiting extracellular oxidative enzymes. Given growing evidence of prevalent anaerobic microsites in upland soils, we des ...
DOI:
10.1007/s10533-021-00781-z

12. How much carbon can be added to soil by sorption?

Author:
Rose Z. Abramoff; Katerina Georgiou; Bertrand Guenet; Margaret S. Torn; Yuanyuan Huang; Haicheng Zhang; Wenting Feng; Sindhu Jagadamma; Klaus Kaiser; Dolly Kothawala; Melanie A. Mayes; Philippe Ciais
Source:
Biogeochemistry 2021 v.152 no.2-3 pp. 127-142
ISSN:
0168-2563
Subject:
carbon sequestration; carbon sinks; dissolved organic carbon; latitude; models; soil carbon; sorption
Abstract:
... Quantifying the upper limit of stable soil carbon storage is essential for guiding policies to increase soil carbon storage. One pool of carbon considered particularly stable across climate zones and soil types is formed when dissolved organic carbon sorbs to minerals. We quantified, for the first time, the potential of mineral soils to sorb additional dissolved organic carbon (DOC) for six soil o ...
DOI:
10.1007/s10533-021-00759-x

13. Wastewater-boosted biodegradation amplifying seasonal variations of pCO2 in the Mekong–Tonle Sap river system

Author:
Ji-Hyung Park; Hyojin Jin; Tae Kyung Yoon; Most Shirina Begum; Chea Eliyan; Eun-Ju Lee; Seung-Cheol Lee; Neung-Hwan Oh
Source:
Biogeochemistry 2021 v.155 no.2 pp. 219-235
ISSN:
0168-2563
Subject:
biodegradation; carbon dioxide; dissolved organic carbon; dry season; fluorescence; homogenization; monsoon season; partial pressure; photosynthesis; phytoplankton; riparian areas; river water; rivers; sap flow; sewage; surveys; urbanization; wastewater; water pollution
Abstract:
... Water pollution disrupts the ecological integrity of urbanized river systems, but its impacts on riverine metabolic processes and carbon fluxes are poorly studied in developing countries. Three seasonal field surveys were combined with two high-resolution measurements and an in situ incubation experiment to investigate the effects of untreated wastewater on organic matter biodegradation and the pa ...
DOI:
10.1007/s10533-021-00823-6

14. Dissolved methane concentrations and fluxes to the atmosphere from a tropical floodplain lake

Author:
Pedro M. Barbosa; John M. Melack; João H. F. Amaral; Sally MacIntyre; Daniele Kasper; Alicia Cortés; Vinicius F. Farjalla; Bruce R. Forsberg
Source:
Biogeochemistry 2020 v.148 no.2 pp. 129-151
ISSN:
0168-2563
Subject:
aquatic habitat; dissolved organic carbon; environmental factors; floodplains; greenhouse gas emissions; herbaceous plants; lakes; methane; methane production; nitrogen; sediments; statistical models; surface water; temperature; uncertainty
Abstract:
... Large uncertainties in estimates of methane (CH₄) emissions from tropical inland waters reflect the paucity of information at appropriate temporal and spatial scales. CH₄ concentrations, diffusive and ebullitive fluxes, and environmental parameters in contrasting aquatic habitats of Lake Janauacá, an Amazon floodplain lake, measured for two years revealed patterns in temporal and spatial variabili ...
DOI:
10.1007/s10533-020-00650-1

15. Dissolved organic carbon production and flux under long-term litter manipulations in a Pacific Northwest old-growth forest

Author:
Lucas R. Evans; Derek Pierson; Kate Lajtha
Source:
Biogeochemistry 2020 v.149 no.1 pp. 75-86
ISSN:
0168-2563
Subject:
Pseudotsuga menziesii; biogeochemistry; coarse woody debris; dissolved organic carbon; groundwater; hydrologic models; lysimeters; old-growth forests; plant litter; soil organic carbon; soil profiles; soil solution; topography
Abstract:
... Dissolved organic carbon (DOC) flux is an important mechanism to convey soil carbon (C) from aboveground organic debris (litter) to deeper soil horizons and can influence the formation of stable soil organic C compounds. The magnitude of this flux depends on both infiltration and DOC production rates which are functions of the climatic, soil, topographic and ecological characteristics of a region. ...
DOI:
10.1007/s10533-020-00667-6

16. Dissolved organic matter composition and reactivity in Lake Victoria, the world’s largest tropical lake

Author:
Loris Deirmendjian; Thibault Lambert; Cedric Morana; Steven Bouillon; Jean-Pierre Descy; William Okello; Alberto V. Borges
Source:
Biogeochemistry 2020 v.150 no.1 pp. 61-83
ISSN:
0168-2563
Subject:
absorption; biogeochemistry; data collection; dissolved organic carbon; factor analysis; fluorescence; lakes; phytoplankton; rivers; runoff; stable isotopes; Eastern Africa; Lake Victoria
Abstract:
... We report a data set of dissolved organic carbon (DOC) concentration and dissolved organic matter (DOM) composition (stable carbon isotope signatures, absorption and fluorescence properties) obtained from samples collected in Lake Victoria, a large lake in East Africa. Samples were collected in 2018–2019 along a bathymetric gradient (bays to open waters), during three contrasting seasons: long rai ...
DOI:
10.1007/s10533-020-00687-2

17. Fate and stability of dissolved organic carbon in topsoils and subsoils under beech forests

Author:
Fabian Kalks; Patrick Liebmann; Patrick Wordell-Dietrich; Georg Guggenberger; Karsten Kalbitz; Robert Mikutta; Mirjam Helfrich; Axel Don
Source:
Biogeochemistry 2020 v.148 no.2 pp. 111-128
ISSN:
0168-2563
Subject:
Fagus; carbon sinks; dissolved organic carbon; drilling; environmental factors; forests; isotope labeling; microorganisms; mineralization; organic horizons; preferential flow; soil depth; stable isotopes; subsoil; topsoil
Abstract:
... Dissolved organic carbon (DOC) from Oa horizons has been proposed to be an important contributor for subsoil organic carbon stocks. We investigated the fate of DOC by directly injecting a DOC solution from ¹³C labelled litter into three soil depths at beech forest sites. Fate of injected DOC was quantified with deep drilling soil cores down to 2 m depth, 3 and 17 months after the injection. 27 ± 2 ...
DOI:
10.1007/s10533-020-00649-8

18. Integrating atmospheric deposition-driven nutrients (N and P), microbial and biogeochemical processes in the watershed with carbon and nutrient export to the Ganga River

Author:
Ekabal Siddiqui; Jitendra Pandey; Usha Pandey; Vibha Mishra; Anand Vikram Singh
Source:
Biogeochemistry 2020 v.147 no.2 pp. 149-178
ISSN:
0168-2563
Subject:
agricultural land; atmospheric deposition; basins; beta-glucosidase; biogeochemistry; coastal ecosystems; deciduous forests; dissolved organic carbon; enzyme activity; grasslands; land use; microbial activity; microbial biomass; mixed forests; nutrients; pot culture; rivers; runoff; shrublands; soil; soil microorganisms; wastelands; water solubility; watersheds
Abstract:
... There has been considerable debate on how atmospheric deposition (AD) in the watershed alters the supply of dissolved organic carbon (DOC) to river and coastal ecosystems. Here we show how AD-N and –P in the Ganga River Basin (GRB) drives the delivery of DOC. We conducted three sets of studies, a 3 year (2016–2018) in situ trial, a 5 year (2014–2018) soil-spray experiment and a decadal-scale (2009 ...
DOI:
10.1007/s10533-019-00634-w

19. Phosphorus, nitrogen and dissolved organic carbon fluxes from sediments in freshwater rivermouths entering Green Bay (Lake Michigan; USA)

Author:
James H. Larson; William F. James; Faith A. Fitzpatrick; Paul C. Frost; Mary Anne Evans; Paul C. Reneau; Marguerite A. Xenopoulos
Source:
Biogeochemistry 2020 v.147 no.2 pp. 179-197
ISSN:
0168-2563
Subject:
ammonium; denitrification; dissolved organic carbon; ecosystems; freshwater; growing season; iron; least squares; nitrates; nitrites; nitrogen; porosity; reactive phosphorus; rivers; sediment properties; summer; temperature; watersheds; Lake Michigan; United States
Abstract:
... Transitional areas between ecosystem types are often active biogeochemically due to resource limitation changes. Lotic-to-lentic transitions in freshwaters appear active biogeochemically, but few studies have directly measured nutrient processing rates to assess whether processing within the rivermouth is important for load estimates or the local communities. We measured oxic fluxes of inorganic n ...
DOI:
10.1007/s10533-020-00635-0

20. The partitioning of litter carbon fates during decomposition under different rainfall patterns: a laboratory study

Author:
Xu Yang; Katalin Szlavecz; Scott L. Pitz; J. Adam Langley; Chih-Han Chang
Source:
Biogeochemistry 2020 v.148 no.2 pp. 153-168
ISSN:
0168-2563
Subject:
Liriodendron tulipifera; carbon cycle; carbon dioxide; cell respiration; climate models; dissolved organic carbon; forest soils; isotope labeling; labile carbon; laboratory experimentation; leachates; leaching; plant litter; rain; rain intensity; soil water; stable isotopes; temperate forests; temperate soils
Abstract:
... During litter decomposition, three major fates of litter carbon (C) are possible: emission as carbon dioxide (CO₂) into the atmosphere, leaching of dissolved organic carbon (DOC), and translocation and transformation into soil organic carbon (SOC). Soil moisture, one of the key drivers of litter decomposition, is predicted to change in the future due to shifts in precipitation patterns. We explore ...
DOI:
10.1007/s10533-020-00651-0