Distribution of Dissolved Organic Carbon and Bacteria at the Interface between the Rhône River and Its Alluvial Aquifer

Marmonier, Pierre; Fontvieille, Dominique; Gibert, Janine; Vaněk, V.

doi:10.2307/1467204

Cited by 78 publications

(62 citation statements)

References 23 publications

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“…Immobilization of DOC was less pronounced and mainly due to abiotic mechanisms (Kolar et al unpubl.). These findings support earlier reports , Marmonier et al 1995 pointing to the importance of shallow subsurface layers in modifying the quality of the infiltrating waters. In the present paper, we therefore specifically focus on the dynamics of dissolved oxygen, DOC, and bacteria in the shallow riparian porewater (<1 m from the sediment-water interface).…”

Section: Introductionsupporting

confidence: 93%

“…Removal of DOC from interstitial waters is often linked to the abundance and the activity of hyporheic bacteria (Findlay et al 1993, Marmonier et al 1995 and bacterial growth on porewater DOC has been demonstrated (Findlay et al 1993, Mann & Wetzel 1995. However, abiotic immobilization (via the diffusion of solutes into the biofilm matrix of sediments and adsorption onto biofilm binding sites and mineral surfaces) is considered to be an important mechanism in the removal of DOC from interstitial waters (McDowell 1985, Fiebig & Lock 1991.…”

Section: Importance Of Doc Immobilization For the Microbial Metabolismentioning

confidence: 99%

“…The chemical and biological characteristics of downwelling surface water change significantly upon subsurface transport , Hendricks & White 1995, Marmonier et al 1995. In particular, dissolved oxygen and dissolved organic carbon (DOC) have been demonstrated to decline along interstitial flow paths (Findlay et al 1993, Hendricks 1993, Findlay & Sobczak 1996.…”

Section: Introductionmentioning

confidence: 99%

“…Vervier et al 1993, Brunke & Gonser 1997. In addition, the transport of surface water through the riparian zones of rivers and lakes by artificial means (bank filtration) has become increasingly important for drinking water production, because organic matter as well as pollutants and harmful bacteria potentially present in the infiltrating water are efficiently retained during transport through the river bank , Marmonier et al 1995, Freedman et al 1997. Brugger et al (in press) investigated a series of porewater and sediment stations from an experimental bank filtration site at the Enns River (Upper Austria) and found oxygen concentration, particulate organic carbon (POC) concentration, and bacterial abundance and production to decrease with increasing lateral distance from the river.…”

Section: Introductionmentioning

confidence: 99%

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mmobilization and bacterial utilization of dissolved organic carbon entering the riparian zone of the alpine Enns River, Austria

Brugger¹,

Wett²,

Kolar³

et al. 2001

Aquat. Microb. Ecol.

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In order to understand the factors controlling the removal of riverine dissolved organic carbon (DOC) in the riparian zone of an alpine river, concentrations of DOC and dissolved oxygen, as well as bacterial abundance and production, were determined in interstitial waters of an experimental bank filtration site of the Enns River, Austria. Four porewater stations exhibiting differing sedimentologic and hydrologic characteristics were sampled over an annual cycle. We found that concentrations of DOC, oxygen, bacterial biomass and production decreased significantly within the first meter from the sediment-water interface. Differences in the grain size distribution among the sampling stations led to spatial heterogeneity in the permeability of the riparian sediments and in the hydraulic residence time of the infiltrating river water, resulting in specific patterns in DOC immobilization and microbial respiration. Porewater bacterial abundance and production and apparent microbial oxygen consumption were positively correlated with the hydraulic residence time of the infiltrating water. DOC occasionally accumulated in the shallow porewater layers during the winter. During the summer, DOC infiltrating from the river surface potentially explained only 36 ± 25% of the apparent interstitial oxygen consumption. This suggests that particulate organic carbon (POC) contributes substantially to the microbial organic carbon supply in the hyporheic zone. We conclude that the availability of POC rather than DOC infiltration determines hyporheic microbial metabolism. KEY WORDS: Hyporheic bacteria · POC · DOC · Respiration · Sediment · Bank filtration · Enns RiverResale or republication not permitted without written consent of the publisher

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Section: Introductionsupporting

confidence: 93%

Section: Importance Of Doc Immobilization For the Microbial Metabolismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

mmobilization and bacterial utilization of dissolved organic carbon entering the riparian zone of the alpine Enns River, Austria

Brugger¹,

Wett²,

Kolar³

et al. 2001

Aquat. Microb. Ecol.

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“…The POM content was also high on the stoss side. Hence, this sandy bedform traps and stores suspended matter, as has previously been described for infiltration zones in gravel-bed mountain rivers (Marmonier et al 1995). Similarly, in the subaqueous dune, advective particle transport was driven by pressure gradients.…”

Section: Spatial Pattern Within Subaqueous Dunesupporting

confidence: 60%

Microbial activity within a subaqueous dune in a large lowland river (River Elbe, Germany)

Wilczek¹,

Fischer²,

Brunke³

2004

Aquat. Microb. Ecol.

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Microbial processes within subaqueous dunes of large rivers are important for organic matter retention and decomposition but have rarely been examined. We investigated 3 morphodynamically defined zones (stoss side, crestal plateau, and lee side) within a subaqueous dune in the 8th-order River Elbe. Analysis of flow velocity, vertical hydraulic gradient, concentration of mobile fine interstitial particles, and the quantity and biochemical quality of sedimentary organic matter indicated that the stoss and the lee sides of the dune were focal zones of particulate matter retention due to infiltration and sedimentation processes. Bacterial abundance and most measures of microbial activity (sediment community respiration and activities of the extracellular enzymes β-glucosidase, leucine aminopeptidase, β-xylosidase, and exo-1, 4-β-glucanase) were significantly higher in these zones than in the plateau. Increases in bacterial abundance and microbial activity were closely correlated with protein, carbohydrates, nitrogen and phaeopigments associated with high-quality particulate organic matter. Our findings showed that the morphodynamic differentiation of the subaqueous dune resulted in the formation of distinct functional zones in the sediment. The underlying mechanisms can be conceptually summarized by a 2-stage regulatory hierarchy. Microbial activities were controlled directly by the input of dissolved oxygen and easily degradable microbial substrates, and indirectly by hydromorphological processes. We conclude that the subaqueous dune functioned as an efficient filter of particulate organic matter, and that the stoss and the lee sides of this river bedform were focal sites of microbial carbon mineralisation in the large river ecosystem.

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Interstitial fauna in newly-created floodplain canals of a large regulated river

Marmonier

Claret

Dole‐Olivier

2000

Regul. Rivers: Res. Mgmt.

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Distribution of Dissolved Organic Carbon and Bacteria at the Interface between the Rhône River and Its Alluvial Aquifer

Cited by 78 publications

References 23 publications

mmobilization and bacterial utilization of dissolved organic carbon entering the riparian zone of the alpine Enns River, Austria

mmobilization and bacterial utilization of dissolved organic carbon entering the riparian zone of the alpine Enns River, Austria

Microbial activity within a subaqueous dune in a large lowland river (River Elbe, Germany)

Interstitial fauna in newly-created floodplain canals of a large regulated river

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