Aerobic and anaerobic decomposition of organic matter in marine sediment: Which is fastest?

Kristensen, Erik; Ahmed, S. I.; Devol, Allan H.

doi:10.4319/lo.1995.40.8.1430

Cited by 360 publications

(257 citation statements)

References 23 publications

Supporting

Mentioning

240

Contrasting

Unclassified

Order By: Relevance

“…This agreed with Atkinson and Cairns (2001), who found that slower cattail decomposition rates were associated with longer HPs. They suggested that longer HPs created anaerobic conditions that slowed microbial efficiency, which agrees with other studies (Kristensen et al 1995;Scanlon & Moore 2000). Intermittent flooding may lead to higher decomposition rates for cattail than permanently flooded conditions (van der Valk et al 1991).…”

Section: Broadleaf Cattailsupporting

confidence: 80%

Influence of environmental parameters on litter decomposition in wetlands in West Virginia, USA

Gingerich

Merovich

Anderson

2014

Journal of Freshwater Ecology

View full text Add to dashboard Cite

Plant litter decomposition varies by species and environmental conditions. To study environmental controls of decomposition, we measured plant litter decomposition rates in six wetlands located in West Virginia, USA. Four common wetland litter species were used: broadleaf cattail (Typha latifolia L.), common rush (Juncus effusus L.), brookside alder (Alnus serrulata (Ait.) Willd.), and reed canary grass (Phalaris arundinacea L.). A fifth litter type was created from a mix of common rush, brookside alder, and reed canary grass. Litter bags were collected over two years, from December 2007 to December 2009, and environmental variables near litter bags were measured every two weeks. Nine environmental parameters and one study parameter were then used to construct and test the ability of 22 a-priori models to predict the decomposition rate of each litter type. The environmental variables that most influenced and, therefore, best predicted decomposition rate varied among litter types. Brookside alder decomposition rate was best predicted by soil temperature (ST), water pH (WPH), and the number of transitions between flooded and exposed conditions (FET); reed canary grass decomposition rate was best predicted by air temperature (AT), WPH, and ST; common rush decomposition rates were best predicted by AT; broadleaf cattail decomposition rate was best predicted by hydroperiod (HP) and FET; and the mixed litter decomposition rate was best predicted by AT and WPH. Overall, AT, ST, and WPH were directly related to decomposition rate, while HP was inversely related. The FET was directly related to decomposition rates of common rush and broadleaf cattail and inversely related to the decomposition rate of brookside alder. The study of litter decomposition helps reveal the link between environmental conditions and wetland function.

show abstract

Section: Broadleaf Cattailsupporting

confidence: 80%

Influence of environmental parameters on litter decomposition in wetlands in West Virginia, USA

Gingerich

Merovich

Anderson

2014

Journal of Freshwater Ecology

View full text Add to dashboard Cite

show abstract

“…In contrast, a DOC accumulation is observed in the anoxic fluid mud (Fig. 8), similar to those reported in anoxic microcosm experiments (Otsuki and Hanya 1972a,b;Hansen and Blackburn 1991;Kristensen et al 1995;Andersen 1996). This DOC supply can be attributed to both desorption processes (Keil et al 1994), because of surface competition and rapid pH change (Morel et al 1991), and to the death of aerobic bacteria.…”

Section: Stoichiometry Of Early Diagenesis and Carbonate Dissolution mentioning

confidence: 47%

“…Because fluid mud preferentially exists during low river discharge periods, oxic/anoxic oscillation occurrence has to be relativized according to the season. Anaerobic mineralization, which transforms refractory POM slower than aerobic decomposition (Kristensen et al 1995), is restricted in time because periodic massive resuspensions occur. In contrast, a DOC accumulation is observed in the anoxic fluid mud (Fig.…”

Section: Stoichiometry Of Early Diagenesis and Carbonate Dissolution mentioning

confidence: 99%

Oxic/anoxic oscillations and organic carbon mineralization in an estuarine maximum turbidity zone (The Gironde, France)

Abril

Etcheber

Hir³

et al. 1999

Limnology & Oceanography

152

121

View full text Add to dashboard Cite

The study of vertical particle dynamics in the highly turbid Gironde Estuary has shown intense cycles of sedimentation and resuspension at both diurnal and neap-spring time scales. Fluid mud, with suspended particulate matter (SPM) concentrations between 50 and 500 g liter ) preferentially reworked at the neap-spring time scale. Due to the alternation of sedimentation and resuspension periods, most of the sediment experienced oxic/anoxic oscillations throughout the neap-spring cycle. Fluid mud resuspension occurred without any observable incidence on the surface-water oxygenation. An increase in total alkalinity was found in the fluid mud, due to both anaerobic respiration and a carbonate dissolution coupled to aerobic respiratory CO 2 generation. This phenomenon significantly affected the inorganic carbon budget of the estuary, increasing the HCO input to the coastal ocean and reducing the CO 2 flux to the atmosphere. An Ϫ 3 accumulation of labile-dissolved organic carbon observed in the fluid mud suggests that these oscillations result in an acceleration of particulate organic matter (POM) decomposition. In the Gironde MTZ, a net loss of refractory land-derived POM occurs. This system acts as an efficient oxic/suboxic ''fluidized bed reactor,'' similar to mobile deltaic muds.Understanding processes affecting carbon distribution through estuaries is of major importance for a better assessment of the contribution of world rivers to the carbon budget of the coastal ocean. The influence of tides in macrotidal estuaries increases the residence times of both water and 1 Present address: Université de Liège, Mécanique des Fluides Géophysiques, Unité d'Océanographie Chimique, Institut de Physique (B5), B-4000 Sart Tilman, Belgium. AcknowledgmentsThis work has been funded by the European Commission in the framework of the Biogest project (ENV4-CT96-0213); this is a contribution of the Eloise Projects network. It was also supported by the URM 13 project, linking IFREMER and the University of Bordeaux I.-DGO-UMR 5805. Fieldwork was carried out onboard the RV Gwen Drez (IFREMER, France), the RVs Côte d'Aquitaine and Côte de la Manche (INSU, France), and the RV Belgica (Belgium); we thank captains and crews. A. De Resseguier (DGO) built the fluid mud sampler and was present on the field for sampling assistance. We are grateful to P. Castaing and A. Sottolichio (DGO) for help in using the OBS and to A. V. Borges (University of Liège)

show abstract

“…The low DO in the waste sites is associated with increased decomposition of organic matter which requires oxygen especially during aerobic decomposition. According to Kristensen et al [47], oxygen plays two important functions during the degradation of organic matter, i.e. is a terminal electron acceptor for electrons released during oxidation of organic carbon and is a reactant in the oxygenase catalyzed primary attack on the substrate molecules.…”

Section: Dissolved Oxygen (Do)mentioning

confidence: 99%

Physico-Chemical Quality of Lake Kyoga at Selected Landing Sites and Anthropogenic Activities

Ongom¹,

Andama²,

Lukubye³

2017

JWARP

View full text Add to dashboard Cite

Lake Kyoga, one of the great African lakes in Uganda is facing an increasing pressure from human activities yet there is limited information on water quality of the lake. Therefore this study determined selected physico-chemical parameters of Lake Kyoga at some landing sites (Kayei, Acholi inn, Waitumba, Masindi port) and anthropogenic activities (boat dock, waste site, garden, fishing). The parameters included temperature, pH, water flow rate, dissolved oxygen (DO), nitrite ( 2 NO − ) and phosphate (PO 4 -P). The American Public Health Association (APHA) and Water Watch Australia protocols, standard meters, Merck's rapid test kits and timing of a float were used to measure the parameters. The results showed that the mean temperature, pH, DO, 2 NO − and PO 4 -P significantly (p < 0.05) varied across the anthropogenic activities. On the other hand, only temperature, pH and flow rate varied significantly (p < 0.05) across the landing sites. Lake Kyoga water flow rates were the fastest at Masindi port (0.031 m/s) and the least in Waitumba (0.021 m/s) governed by river inflow and surface vegetation cover. The mean pH (6.73 -7.15) and DO (10.15 -13.50 mg/l) of the lake at all the study sites were within the Environmental Protection Agency (EPA) standard values of 5.5 -8.5 and ≥9.0 mg/l respectively. These mean pH and DO values reflect more or less neutral waters which are equally well saturated with oxygen at all the landing sites. However, areas close to the waste sites had the least oxygen levels (10.15 mg/l) followed by gardens (11.82 mg/l) while fishing areas were the most saturated with oxygen (13.50 mg/l). On the other hand, temperature (25.06˚C -25.76˚C) est in the waste sites (0.35 mg/l), followed by gardens (0.24 mg/l) and least in the fishing areas (0.12 mg/l). However, phosphates in the form of P 2 O 5 were higher than the EPA standard value (0.5 mg/l) at Kayei (0.55 mg/l) and Acholi inn (0.55 mg/l) landing sites as well as at waste sites (0.80 mg/l) and gardens (0.55 mg/l) pointing to high nutrient (phosphorus) input at these sites. The high concentrations of nitrites in Lake Kyoga at the investigated anthropogenic activities and landing sites plus phosphate amounts close to waste sites and gardens including Kayei and Acholi inn landing sites call for vigilance in protection of Lake Kyoga through optimized planning. Hence, National Environment Management Authority should ensure proper sewage management in Lake Kyoga catchment to avoid discharge of untreated sewage into the lake. The authority should also regulate waste dumping and cultivation around the lake so as to reduce nutrient (phosphorus) enrichment.

show abstract

Aerobic and anaerobic decomposition of organic matter in marine sediment: Which is fastest?

Cited by 360 publications

References 23 publications

Influence of environmental parameters on litter decomposition in wetlands in West Virginia, USA

Influence of environmental parameters on litter decomposition in wetlands in West Virginia, USA

Oxic/anoxic oscillations and organic carbon mineralization in an estuarine maximum turbidity zone (The Gironde, France)

Physico-Chemical Quality of Lake Kyoga at Selected Landing Sites and Anthropogenic Activities

Contact Info

Product

Resources

About