Influence of carbonates on the riverine carbon cycle in an anthropogenically dominated catchment basin: evidence from major elements and stable carbon isotopes in the Lagan River (N. Ireland)

Barth, J. A. C.; Cronin, Aidan A.; Dunlop, J. S. R.; Kalin, Robert M.

doi:10.1016/s0009-2541(03)00193-1

Cited by 156 publications

(100 citation statements)

References 24 publications

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“…8 results from the complex interplay between organic matter degradation, planktonic photosynthesis, atmospheric gas exchange, and dissolution of carbonates of either natural or anthropogenic origin (Barth et al, 2003;Schulte et al, 2011;Zeng et al, 2011;Maher et al, 405 2013). The observed values of δ 13 C CO2 fall within the reported ranges of δ 13 C measured for CO 2 originating from riverine organic matter degradation (−25 -−15‰) (Longinelli and Edmond, 1983;McCallister and del Giorgio, 2008).…”

Section: Tracking Sources Of Dom and Ghgs Using C Isotopesmentioning

confidence: 99%

“…However, these values are less negative than the ranges of δ 13 C measured directly for CO 2 respired by bacteria consuming organic matter of terrestrial and algal origin in two streams and eight lakes in Canada (−32.5 -−28.4‰) (McCallister and del Giorgio, 2008), indicating that other riverine processes than bacterial degradation are involved in shifting δ 13 C in dissolved CO 2 . It has been 410 reported that δ 13 C in riverine DIC derived from carbonate dissolution and bacterial respiration ranges from −15 -−5‰, reflecting the balance between the concurrent processes that can either enrich or deplete DIC in 13 C (Telmer and Veizer et al, 1999;Barth et al, 2003;Schulte et al, 2011;Zeng et al, 2011). Photosynthesis and atmospheric gas exchange can result in an enrichment of 13 C in remaining riverine CO 2 through preferential planktonic uptake of the lighter 12 CO 2 and dissolution of atmospheric CO 2 enriched in 13 C, respectively, whereas the preferential use of the lighter CO 2 by heterotrophic bacteria results 415 in decreases in δ 13 C (Schulte et al, 2011).…”

Section: Tracking Sources Of Dom and Ghgs Using C Isotopesmentioning

confidence: 99%

“…‰; AY: -14.7 ‰) relative to the upstream value (-20.9 ‰) (Table S8). Another potential source of isotopic enrichment might be the production of CH 4 from the reduction of CO 2 in the deeper water and bottom sediment, which consumes lighter C resulting in an enrichment of the remaining DIC pool (Barth et al, 2003). However, this mechanism might be less important than other described processes, because the latitudinal increase in δ 13 C in CH 4 (Fig.…”

Section: Tracking Sources Of Dom and Ghgs Using C Isotopesmentioning

confidence: 99%

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Longitudinal discontinuities in riverine greenhouse gas dynamics generated by dams and urban wastewater

Jin¹,

Yoon²,

Begum³

et al. 2018

Preprint

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Abstract.Riverine emissions of CO 2 and other greenhouse gases (GHGs) represent crucial, but poorly constrained components of the global GHG budgets. Three major GHGs -CO 2 , CH 4 , and N 2 O -have rarely been measured simultaneously in river systems modified by human activities, adding uncertainties to the estimates of global riverine GHG emissions. Measurements of C isotopes in dissolved organic carbon (DOC), CO 2 , and CH 4 were combined with basin-wide surveys of three GHGs in the Han 15 River, South Korea to investigate the effects of dams and urban water pollution as primary controls on GHG dynamics in the highly human-impacted river basin with a population >25 million. Monthly monitoring and two-season comparison were conducted at 6 and 15 sites, respectively, to measure surface water concentrations of three GHGs, along with DOC and its optical properties. The basin-wide surveys were complemented with a boat cruise along the lower reach and synoptic samplings along a polluted tributary delivering effluents from a large wastewater treatment plant (WWTP) to the lower reach. The basin-20 wide surveys of three GHGs revealed distinct increases in the concentrations of three gases along the lower reach receiving urban tributaries enriched in GHGs and DOC. Compared to the spatial patterns of GHGs observed in the upper and lower reaches, the levels of pCO 2 were consistently lower across the impounded middle reach, whereas concentrations of CH 4 and N 2 O were relatively high in some impoundment-affected sites. Similar levels and temporal variations in three GHGs at the WWTP effluents and the receiving tributary indicated a disproportionate contribution of the WWTP to the tributary exports of 25 DOC and GHGs. Measurements of δ 13 C in surface water CO 2 and CH 4 sampled during the cruise along the lower reach, combined with δ 13 C and Δ 14 C in dissolved organic matter (DOM) sampled across the basin, implied that longitudinal decreases in Δ 14 C in DOM mighte be associated with wastewater-derived, old DOM in urban tributaries, which, together with enhanced photosynthesis and CH 4 oxidation in the eutrophic lower reach, appear to constrain downstream changes in δ 13 C in CO 2 and CH 4 . The overall results suggest that dams and urban wastewater may create longitudinal discontinuities in riverine metabolic 30 processes leading to large spatial variations in three GHGs. Further research is required to evaluate the relative contributions Biogeosciences Discuss., https://doi

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Section: Tracking Sources Of Dom and Ghgs Using C Isotopesmentioning

confidence: 99%

Section: Tracking Sources Of Dom and Ghgs Using C Isotopesmentioning

confidence: 99%

Section: Tracking Sources Of Dom and Ghgs Using C Isotopesmentioning

confidence: 99%

See 1 more Smart Citation

Longitudinal discontinuities in riverine greenhouse gas dynamics generated by dams and urban wastewater

Jin¹,

Yoon²,

Begum³

et al. 2018

Preprint

View full text Add to dashboard Cite

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“…Understanding the organic and inorganic carbon cycles in river systems is important because it helps to understand the biogeochemical processes in a river and its catchment basin (kariM & Veizer, 2000;barth et al, 2003;saMeer et al, 2016). Several studies evaluating biogeochemical processes in Slovenian rivers have been carried out in the past ten years, contributing substantially to a general understanding of their interactions with their catchments (Kanduč & Ogrinc, 2007;Kanduč et al, 2008;zaVadLaV et al, 2013;Kanduč et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Hydrogeochemical and isotopic characterization of Pesnica River, Slovenia

Kanduč¹,

Samardžija²,

Mori³

et al. 2016

Geologija

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The surface water geochemistry and carbon cycling studied here depend mainly on geological composition of the river catchment. The investigated surface waters in the river Pesnica catchment that are heavily hydromorphologicaly altered (reservoirs, channelization, land melioration systems) represent waters influenced by chemical weathering of carbonates and of mostly clastic rocks (claystone, sandstones, marlstones and siltstones). The objectives of our study were to analyze hydrogeochemical and isotopic composition of dissolved (δ 13 C DIC ) and particulate carbon (δ 13 C POC ) with characterization of suspended matter and evaluate biogeochemical processes in Pesnica River in Slovenia before and after the retention. Surface waters are generally close to saturation regarding calcite and dolomite, dissolved CO 2 is 49 to 1000 times oversaturated relative to atmosphere. δ 13 C DIC was in the range from -14.8 to -4.2 ‰ and shows following biogeochemical processes in river system: degradation of organic matter, dissolution of carbonates and biological activity, which was confirmed with SEM microscopy and EDXS microanalysis. Results of SEM/EDXS showed that suspended matter is composed of K, Mg and Ca from locations Pesnica 1 and Pesnica 2 (above retention Perniško lake). Sample from Pesnica 3 (below retention) shows higher biological activity, while sample from Pesnica 4 (tributary of Pesnica, drainage channel Biš) contains a lot of particles of microporous structure and fiber structure, which are probably of anthropogenic origin. δ 13 C POC is changing from -29.5 to-27.6‰ and showed different stages of degraded terrestrial material. More negative δ 13 C POC are shown at location at drainage channel Biš and show higher terrestrial input in river system as locations 1, 2 and 3 Pesnica, which have higher δ 13 C POC values. This first results about suspended matter in Pesnica watershed serve for evaluation of anthropogenic influences specially in relation with further influences and longer time planning of sustainable river water management. IzvlečekGeokemija površinskih voda in kroženje ogljika v naši študiji v glavnem zavisita od geološke podlage v porečju. Raziskane površinske vode v porečju Pesnice, ki je hidromorfološko močno preoblikovano (vodni zadrževalniki, urejanje struge, melioracije), predstavljajo vode, na katere vpliva kemijsko preperevanje karbonatov in v glavnem klastičnih kamnin (glinavcev, peščenjakov, laporovcev in meljevcev). Namen naše raziskave je bil analizirati hidrogeokemično in izotopsko sestavo raztopljenega in partikulatnega ogljika skupaj s karakterizacijo suspendirane snovi in oceno biogeokemijskih procesov v porečju Pesnice v Sloveniji pred zadrževalnikom in za njim. Površinske vode so večinoma blizu nasičenja glede na kalcit in dolomit, raztopljen CO 2 je od 49 do 1000 krat prenasičen relativno na atmosfero. δ 13 C DIC je bil v razponu od -14.8 do -4.2 ‰ in kaže na sledeče biogeokemijske procese v rečnem sistemu: razgradnja organske snovi, raztapljanje karbonatov in biološka aktivn...

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“…With regard to small catchments, the application of geochemical tools may provide important constraints on runoff (BEN OTHMANN et al, 1997) and on the different endmembers, e.g natural and anthropogenic (PETELET et al, 1998).…”

Section: Introductionmentioning

confidence: 99%

Hydrogeochemical characteristics of the River Idrijca (Slovenia)

Kanduč¹

2008

Geologija

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The hydrogeochemical and isotope characteristics of the River Idrijca, Slovenia, where the world's second largest mercury (Hg) mine is located, were investigated. The River Idrijca, a typical steep mountain river has an HCO 3 --Ca 2+ -Mg 2+ chemical composition. Its Ca 2+ /Mg 2+ molar ratio indicates that dolomite weathering prevails in the watershed. The River Idrijca and its tributaries are oversaturated with respect to calcite and dolomite. The pCO 2 pressure is up to 13 times over atmospheric pressure and represents a source of CO 2 to the atmosphere. δ 18 O values in river water indicate primary control from precipitation and enrichment of the heavy oxygen isotope of infiltrating water recharging the River Idrijca from its slopes. The δ 13 C DIC values range from −10.8 to −6.6 ‰ and are controlled by biogeochemical processes in terrestrial environments and in the stream: 1) exchange with atmospheric CO 2 , 2) degradation of organic matter, 3) dissolution of carbonates, and 4) tributaries. The contributions of these inputs were calculated according to steady state equations and are estimated to be -11 %: 19 %: 31 %: 61 % in the autumn and 0 %: 6 %: 9 %: 35 % in the spring sampling seasons. Izvle~ekHidrogeokemijske in izotopske raziskave so bile izvedene v pore~ju reke Idrijce, kjer se nahaja drugi najve~ji rudnik živega srebra na svetu. Reka Idrijca je hudourni{ka reka, ki ima kemijsko sestavo HCO 3 --Ca 2+ -Mg 2+ . Njeno molarno razmerje Ca 2+ /Mg 2+ kaže, da dolomitno preperevanje v pore~ju prevladuje. Idrijca in njeni pritoki so prenasi~eni s kalcitom in dolomitom. Parcialni tlak (pCO 2 ) je do 13 krat vi{ji v primerjavi z atmosferskim in predstavlja vir CO 2 v ozra~je. Vrednosti δ 18 O v re~ni vodi kažejo, da na njeno δ 18 O vplivajo padavine in infiltrirajo~a voda, ki je obogatena s težjim kisikovim izotopom. δ 13 C vrednosti v vodi se spreminjajo od -10.8 ‰ do 6.6 ‰ in odražajo biogeokemijske procese v kopenskem okolju in tudi v sami reki. Ti procesi so: 1) izmenjava z atmosferskim CO 2 , 2) razgradnja organske snovi, 3) raztapljanje karbonatov in 4) pritoki. Prispevki posameznih procesov so bili izra~unani upo{tevajo~ masno bilan~ni izra~un in ocenjeni kot sledi: -11 %: 19 %: 31 %: 61 % v jesenskem ~asu in 0 %: 26 %: 39 %: 35 % v spomladanski vzor~ni sezoni.

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Influence of carbonates on the riverine carbon cycle in an anthropogenically dominated catchment basin: evidence from major elements and stable carbon isotopes in the Lagan River (N. Ireland)

Cited by 156 publications

References 24 publications

Longitudinal discontinuities in riverine greenhouse gas dynamics generated by dams and urban wastewater

Longitudinal discontinuities in riverine greenhouse gas dynamics generated by dams and urban wastewater

Hydrogeochemical and isotopic characterization of Pesnica River, Slovenia

Hydrogeochemical characteristics of the River Idrijca (Slovenia)

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