Importance of the Denitrification Process for the Rate of Degradation of Organic Matter in Lake Sediments

Andersen, Jens Møller

doi:10.1007/978-94-011-9802-8_53

Cited by 21 publications

(15 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Methods of denitrification measurement: advantages and disadvantages Different methods for measuring denitrification have been developed: the acetylene inhibition technique (Sørensen 1978), the measurement of nitrate disappearance (Andersen 1977), the calculation of nitrate flux between sediment and water (Mengis et al 1997), the nitrogen mass balance approach (Ahlgren 1967), the direct measurement of N 2 production (Seitzinger et al 1980), the 15 N isotope pairing technique (IPT, Nielsen 1992), the determination of N 2 /Ar ratio via Membrane Introduction Mass Spectrometry (MIMS) (Kana et al 1998) and the whole-system scale of 15 N addition (Mulholland et al 2004). In recent years, there has been considerable discussion regarding the reliability of all these techniques, because they all show advantages but also potential problems, doubtful underlying assumptions and limitations that have been dealt with in some studies (Seitzinger et al 1993;Cornwell et al 1999;Steingruber et al 2001, Final Report of the Workshop on Denitrification 2004), why they will not be repeated here.…”

Section: Methodsmentioning

confidence: 99%

“…3, 6). Andersen 1977 showed that anaerobic water conditions resulted in a high rate of denitrification in six Danish lakes compared with conditions with oxygenated water overlying in the sediment. With oxygen present, the uppermost sediment will be maintained at a high redox level as denitrification will occur below this oxidized zone, a longer diffusion pathway for the nitrate will result in lower denitrification rates.…”

Section: Environmental Controls Of Denitrificationmentioning

confidence: 98%

See 1 more Smart Citation

Denitrification in Aquatic Environments: A Cross-system Analysis

2006

View full text Add to dashboard Cite

A meta-analysis was conducted on 136 data sets of denitrification rates (DR) recorded both during the period of highest water temperature and monthly in five types of aquatic ecosystems: oceans, coastal environments, estuaries, lakes and rivers. There was a gradual increase of DR from the ocean to rivers and lakes at both scales, with the rivers showing the highest DR variability. Denitrification peaked during summertime and showed highest seasonal variability in lakes and rivers. High concentrations of nitrate and interstitially-dissolved organic carbon as well as low oxygen concentration in the overlying water enhanced DR both during summer and at a seasonal scale whereas total phosphorus did at the seasonal scale only. There was a positive linear relationship between overlying nitrate and DR over the range of 1-970 lmol NO 3 (r 2 = 0.86, P = 0.001). DR in lakes and rivers might reach values doubling those in the more denitrifying terrestrial ecosystems (e.g. agrosystems). Discrepancies in DR and its controlling factors between site-specific studies and this meta-analysis may arise from environmental variability at two, often confounded, scales of observation: the habitat and the ecosystem level. Future studies on denitrification in aquatic environments should address the topic of spatial heterogeneity more thoroughly.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Environmental Controls Of Denitrificationmentioning

confidence: 98%

Denitrification in Aquatic Environments: A Cross-system Analysis

2006

View full text Add to dashboard Cite

show abstract

“…Greater oxygen availability may enhance nitrification in the oxic sediment zone while higher N03 supply to the suboxic sediment zone will enhance denitrification and N03 ammonification (Pelegri et al 1994) . Various authors have reported a significant increase in oxygen consumption and N03 uptake rates in sediments inhabited by chironomid species (Andersen 1977 ;Edwards & Rolley 1965 ;Granelli 1979 ;Hargrave 1975 ;Tatrai 1982) relative to non-inhabited sediments . Production of NH4 by chironomid larvae appears to be an important mechanism contributing to nitrogen regeneration from lake sediments (Fukuhara & Yasuda 1989 ;Gardner et al .…”

Section: Introductionmentioning

confidence: 99%

Nitrogen cycling in lake sediments bioturbated by Chironomus plumosus larvae, under different degrees of oxygenation

Pelegrí

Blackburn

1996

Hydrobiologia

View full text Add to dashboard Cite

Sediment cores containing different densities of Chironomus plumosus ranging from 0 to 12 000 ind . m-2 were incubated in the laboratory with 100 and 39% 02 saturation in the overlying water . Rates of 02 uptake and fluxes of the various inorganic N species were measured after addition of 15 N0 3 to the overlying water. The animals enhanced 02 and N03 uptake due to irrigation . Denitrification of N03 coming from the overlying water (Dw) and dissimilatory N03 reduction to NH4 (DNRA) represented 20-30 and 4-10% of the N03 uptake respectively . Only 20-40% of the measured NH4 effluxes corresponded to DNRA the rest was probably due to animal excretion . Nitrite production mostly from dissimilatory N03 reduction was detected at both 39 and 100% oxygen saturation . Higher rates of N02 production at the lower oxygen concentrations were probably due to a thinner oxic layer compared to fully oxygenated waters . The presence of Chironomus plumosus increased nitrification rates relative to non-inhabited microcosms . However nitrification rates were low compared to Dw probably due to low numbers of nitrifiers in the sediment. At 39% oxygen saturation rates of nitrification and denitrification of N03 generated within the sediment were not measurable .

show abstract

“…Edwards (1958) found that chironomids increased ammonia and decreased oxidized nitrogen in water overlying settled activated sludge. Anderson (1977) also observed an increase of denitrification in overlying water after addition of chironomids. In the Live microcosms, nitrification of ammonia may have contributed to the increase in sediment nitrate (Chatarpaul et al 1979).…”

Section: Nitrogen Componentsmentioning

confidence: 81%

“…Sulfur, in the form of sulfuric acid, is also a major contributor to acid precipitation (Likens et al 1976), and lake acidification . Nitrogen chemistry has been studied in freshwater by various investigators (Anderson 1977;Chen et al 1972;Hill 1979), while sulfur has been investigated in much less detail (Stuiver 1967;King & Klug 1980). In addition, little work has been done on the effect of benthic invertebrates on nitrogen and sulfur in freshwater sediments.…”

Section: Introductionmentioning

confidence: 99%

Effects of the burrowing mayfly, Hexagenia, on nitrogen and sulfur fractions in lake sediment microcosms

1982

View full text Add to dashboard Cite

Effects of the burrowing mayfly, Hexagenia, on nitrogen and sulfur fractions of sediment, and overlying water were determined.Laboratory microcosms were used to reproduce the benthic environment. The activities of Hexagenia increased sediment Eh (1.98 ± 0.486 (22) mV day-l), and decreased pH in sediment (-0.007 ± 0.001 (22) day-1 ) and overlying water (-0.024 ± 0.004(10) day-'). In the control, Eh decreased and pH did not change. The presence of Hexagenia also markedly increased ammonia in sediment (5.46 ± 0.14 (22) ppm N · day-1 ) and overlying water(0.792 ± 0.154 (10) ppm N day-1 ), while the controldid not change. In addition, the sulfate fraction of sediment (0.177 ± 0.006 (17) % dry mass) and water (50.0 ± 4.9 (5) mg · 1-1) in microcosms with Hexagenia was greater than that of the control (0.151 ± 0.005 (16) % dry mass; 14.7 ± 1.71 (3) mg · 1-1) at the termination of the experiment. Hexagenia may also stimulate the mineralization of carbon-bonded sulfur. The general role of Hexagenia in altering sediment chemistry is discussed.

show abstract

Importance of the Denitrification Process for the Rate of Degradation of Organic Matter in Lake Sediments

Cited by 21 publications

References 6 publications

Denitrification in Aquatic Environments: A Cross-system Analysis

Denitrification in Aquatic Environments: A Cross-system Analysis

Nitrogen cycling in lake sediments bioturbated by Chironomus plumosus larvae, under different degrees of oxygenation

Effects of the burrowing mayfly, Hexagenia, on nitrogen and sulfur fractions in lake sediment microcosms

Contact Info

Product

Resources

About