Anaerobic carbon cycling in stream ecosystems

Dahm, Clifford N.; Carr, Deborah L.; Coleman, Ross

doi:10.1080/03680770.1989.11899028

Cited by 25 publications

(24 citation statements)

References 12 publications

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“…However, they are comparable with those found by other authors (Dahm et al, 1991;deAngelis and Scranton, 1993;Jones et al, 1995;Lilley et al, 1996;Schindler and Krabbenhoft, 1998). Moreover, Dahm et al (1991) and Jones et al (1995) found, as did we, a significant increase of methane in the interstitial water, and Baker et al (1999) demonstrated that the acetate injected into the river sediment results in a significant increase of methanogenesis compared to background concentrations. Methane concentrations were found to be much higher in the upwelling zone, where both redox potential and dissolved oxygen were low, and likewise, the nitrate and sulphate concentrations were reduced.…”

Section: Discussionsupporting

confidence: 93%

“…Since CO 2 showed relatively stable interstitial concentrations, even slightly increasing along the subsurface flowpath, we assume that the generation of CO 2 is greater than its depletion within the hyporheic zone. Although it was suggested that anaerobic interstitial water might generally be enriched in DOC over aerobic waters (Dahm et al, 1991), no similar pattern was observed in our study. However, routine methods of sampling for DOC will not retain methane within the sample and the most commonly employed technique for DOC analysis does not measure methane or other volatile organic compounds.…”

Section: Discussioncontrasting

confidence: 77%

“…The extent of aerobic and anaerobic metabolism in streams is of significance not only for the decomposition dynamics, the chemical form and quantity of many nutrients and trace metals (Grimm and Fisher, 1984), but also (based on supersaturation levels of CO 2 , CH 4 , N 2 O in the water) for the increase in atmospheric greenhouse gas concentrations and global warming (Houghton et al, 2001). Although anaerobic metabolism has been described in many lake, estuary and wetland sediments, there is still a paucity of information in river ecosystems (Dahm et al, 1991;Jones et al, 1995;Holmes et al, 1996). Hyporheic metabolic processes are tightly coupled to vertical hydrological exchange, and distribution and extent of anaerobic metabolism along the subsurface flowpath are affected by many factors, including substrate availability, oxygen supply, flow rate, temperature and the presence of electron acceptors such as nitrate and sulphate.…”

Section: Introductionmentioning

confidence: 99%

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Anaerobic microbial metabolism in hyporheic sediment of a gravel bar in a small lowland stream

Hlaváčová¹,

Rulı́k²,

Čáp³

2005

River Res. Applic.

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Distribution of dissolved oxygen, nitrate, sulphate, carbon dioxide and dissolved organic carbon (DOC), acetate and lactate was studied in the stream and interstitial water along the subsurface flowpath in the hyporheic zone of a small lowland stream. Sediments were found to act as a source of nitrous oxide and methane. Interstitial methane concentrations were significantly much higher in comparison to those from surface water, and were significantly lower in the relatively well oxygenated downwelling zone than in the rather anoxic upwelling zone. The interstitial concentrations of O 2 , NO 3 À1 and SO 4 À2 showed significant decline along the subsurface flowpath, while concentrations of CO 2 , N 2 O, DOC, acetate and lactate remained unchanged. In addition to field measurements, ex situ incubation of sediments was carried out in the laboratory. Maximal methane production was found in the incubation assay using acetate (mean value 380 mg CH 4 kg DW À1 d À1 ). Mean value of the denitrification potential was 1.1 mg N 2 O kg DW À1 d À1. Nitrous oxide production potential reached 71-100% of denitrification potential. Our results demonstrate that respiration of oxygen, nitrate, sulphate and methanogenesis may coexist within the hyporheic zone and that anaerobic metabolism is an important pathway in organic carbon cycling in the Sitka stream sediments.

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Section: Discussionsupporting

confidence: 93%

Section: Discussioncontrasting

confidence: 77%

Section: Introductionmentioning

confidence: 99%

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Anaerobic microbial metabolism in hyporheic sediment of a gravel bar in a small lowland stream

Hlaváčová¹,

Rulı́k²,

Čáp³

2005

River Res. Applic.

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“…Denitrification is likely considering the less porous bed sediment and the anoxic conditions (Duff and Triska, 1990;Hendricks and White, 1991;Triska et al, 1993). This has been shown in other small streams (Triska et al, 1989;Dahm et al, 1991).…”

Section: Discussionmentioning

confidence: 91%

The role of the hyporheic zone in the nitrogen dynamics of a semi‐arid gravel bed stream located downstream of a heavily polluted reservoir (Tafna wadi, Algeria)

Taleb

Belaidi

Sánchez‐Pérez

et al. 2008

River Research & Apps

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Nitrogen retention was measured along the Tafna wadi downstream of a heavily polluted reservoir in North-West Algeria to understand the role of the hyporheic zone (HZ) in nitrogen dynamics. Nutrient concentrations were measured monthly for 2 years within the bed sediments of a 300 m reach located 20 km downstream from the dam. Due to strong hydrological fluctuations hyporheic water was analysed during natural low and high water (HW) periods, and during water reservoir releases. Nutrient concentrations in surface water (SW) increased during water releases and in the HZ during the low water (LW) periods. Surface/hyporheic water interactions were characterized by determining the vertical hydraulic gradient (VHG) and the chemical signature of the ground water (GW). The latter was obtained from regional GW monitoring. Hyporheic chemistry was strongly influenced by patterns of surface flow. Hyporheic and SWs had similar chloride concentrations during high flow when they were significantly lower than those of the regional GW. GW was generally richer in nitrates and nitrites, but was lower in ammonium concentrations than interstitial and river waters. Nitrates decreased significantly from upstream to downstream within the HZ throughout the hydrological period even though temporal fluctuations were high. Ammonium concentrations in interstitial water (IW) were significantly higher than in SW and generally increased from upstream to downstream. This study demonstrates the importance of the HZ in altering the dissolved inorganic nitrogen composition and concentrations of heavily polluted arid streams. The study is of interest because it documents a large 'natural experiment' that being the effect of periodic water release from a reservoir with serious water quality problems on the water quality dynamics (particularly nitrogen) of subsurface and SWs downstream.

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“…Extent of anoxia (measured by the presence of ferrous iron; Stookey 1970;Dahm et al 1991) and methane concentration were determined by sampling subsurface water every 2 m along 21 transects located every 5 m across the stream channel throughout the 100 m reach (124 sample points total; Fig. 2).…”

Section: Interstitial Methane and Methane Evasion In Sycamore Creekmentioning

confidence: 99%

Methanogenesis in Arizona, USA dryland streams

et al. 1995

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Abstract. Methanogenesis was studied in five streams of central and southern Arizona by examining the distribution of methane in interstitial water and evasion of methane in three subsystems (hyporheic, parafluvial and bank sediments). In Sycamore Creek, the primary study site (studied during summer and early autumn), methane content of interstitial water exhibited a distinct spatial pattern. In hyporheic (sediments beneath the wetted channel) and parfluvial zones (active channel sediments lateral to the wetted channel), which were well oxygenated due to high hydrologic exchange with the surface stream and had little particulate organic matter (POM), interstitial methane concentration averaged only 0.03 mgCH 4 -C/L. Bank sediments (interface between the active channel and riparian zone), in contrast, which were typically vegetated, had high POM, low hydrologic exchange and concomitantly low dissolved oxygen levels, had interstitial concentration averaging 1.5 mgCH 4 -C/L. Methane emission from Sycamore Creek, similar to methane concentration, averaged only 3.7 mgCH 4 -C.m-2 d-from hyporheic and parafluvial zones as opposed to 170 mgCH 4 -C-m-2 .d-from anoxic bank sediments. Methane in four additional streams sampled (one sampling date during late winter) was low and exhibited little spatial variation most likely due to cooler stream temperatures. Interstitial methane in parafluvial and bank sediments of all four streams ranged from only 0.005 to 0.1 mgCH 4 -C/L. Similarly methane evasion was also low from these streams varying from 0 to 5.7 mgCH 4 -Cm-2d -'. The effects of organic matter and temperature on methanogenesis were further examined by experimentally manipulating POM and temperature in stoppered flasks filled with hyporheic sediments and stream water. Methane production significantly increased with all independent variables. Methane production is greatest in bank sediments that are relatively isolated hydrologically and lowest in hyporheic and parafluvial sediments that are interactive with the surface stream.

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Anaerobic carbon cycling in stream ecosystems

Cited by 25 publications

References 12 publications

Anaerobic microbial metabolism in hyporheic sediment of a gravel bar in a small lowland stream

Anaerobic microbial metabolism in hyporheic sediment of a gravel bar in a small lowland stream

The role of the hyporheic zone in the nitrogen dynamics of a semi‐arid gravel bed stream located downstream of a heavily polluted reservoir (Tafna wadi, Algeria)

Methanogenesis in Arizona, USA dryland streams

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