Determination of P Release from Rostherne Mere Sediment Cores

Krivtsov, Vladimir; Sigee, David C.; Bellinger, Edward G.; Porteous, Garry

doi:10.1002/1521-401x(200109)29:2/3<111::aid-aheh111>3.0.co;2-1

Cited by 13 publications

(6 citation statements)

References 6 publications

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“…Sediment release rates of SRP remained relatively invariant through time in all chambers, irrespective of initial DO concentration or changes in DO. While SRP release rates are generally reported to be much higher during water column anoxia than under well-oxygenated conditions (Andersen & Ring, 1999;Nowlin et al, 2005), there is evidence in sediment core incubations for high release rates under aerobic conditions (Søndergaard 1989;Jensen & Andersen, 1992;Krivtsov et al, 2001). It has been suggested that SRP release under aerobic conditions is associated with high rates of organic material decomposition at the sediment-water interface (Marsden, 1989;Kleeberg & Kozerski, 1997).…”

Section: Sediment Nutrient Fluxesmentioning

confidence: 99%

“…It has been suggested that SRP release under aerobic conditions is associated with high rates of organic material decomposition at the sediment-water interface (Marsden, 1989;Kleeberg & Kozerski, 1997). Rapid decomposition utilises oxygen and nitrate and may create localised reducing conditions leading to desorption of P from metal cation complexes (Kleeberg & Kozerski, 1997;Krivtsov et al, 2001). Gä chter et al (1988) suggest that SRP release rates may also be partly controlled by changes in sediment microbial physiology, including uptake, storage and release of P, as well as production and decomposition of bacterial biomass.…”

Section: Sediment Nutrient Fluxesmentioning

confidence: 99%

“…Direct measurements of sediment nutrient release rates are generally obtained from sediment core incubations conducted in the laboratory (e.g., Boströ m and Pettersson, 1982;Nü rnberg, 1987;Krivtsov et al, 2001). Incubations typically incorporate only a small sediment area (<0.01 m -2 ), but allow for tight environmental controls and provide opportunities to manipulate cores to address specific questions.…”

Section: Introductionmentioning

confidence: 99%

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Benthic nutrient fluxes in a eutrophic, polymictic lake

et al. 2007

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Sediment release rates of soluble reactive phosphorus (SRP) and ammonium (NH 4 ) were determined seasonally at three sites (water depth 7, 14 and 20 m) in Lake Rotorua using in situ benthic chamber incubations. Rates of release of SRP ranged from 2.2 to 85.6 mg P m -2 d -1 and were largely independent of dissolved oxygen (DO) concentration. Two phases of NH 4 release were observed in the chamber incubations; high initial rates of up to 2,200 mg N m -2 d -1 in the first 12 h of deployment followed by lower rates of up to 270 mg N m -2 d -1 in the remaining 36 h of deployment. Releases of SRP and NH 4 were highest in summer and at the deepest of the three sites. High organic matter supply rates to the sediments may be important for sustaining high rates of sediment nutrient release. A nutrient budget of Lake Rotorua indicates that internal nutrient sources derived from benthic fluxes are more important than external nutrient sources to the lake.

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Section: Sediment Nutrient Fluxesmentioning

confidence: 99%

Section: Sediment Nutrient Fluxesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Benthic nutrient fluxes in a eutrophic, polymictic lake

et al. 2007

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“…The epilimnion, however, remains well oxygenated and nutrient dynamics are mainly influenced by biological uptake, replenishment from inflows, and entrainment of hypolimnetic waters during periods of windy weather (Krivtsov et al 2001 a ). Despite the removal of point‐source sewage effluent, the lake is still hyper‐eutrophic (216 ± 88 μg P L −1 ; Scott ) with high levels of P mobilized from the sediments below the anoxic hypolimnion (7–11 mg m −2 d; Krivtsov et al 2001 b ) causing substantial internal loading and limiting the rate of ecological recovery (Krivtsov and Sigee ; Moss et al ).…”

Section: Methodsmentioning

confidence: 99%

The historical dependency of organic carbon burial efficiency

Radbourne

Ryves

Anderson

et al. 2017

Limnology & Oceanography

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Many studies have viewed lakes as quasi-static systems with regard to the rate of organic carbon (OC) burial, assuming that the dominant control on BE is sediment mineralization. However, in systems undergoing eutrophication or oligotrophication (i.e., altered nutrient loading), or climatic forcing, the changes in primary production will vary on both longer (> 10 yr) and shorter (seasonal) timescales, influencing the rate of OC accumulation and subsequent permanent burial. Here, we consider the extent to which permanent OC burial reflects changing production in a deep monomictic lake (Rostherne Mere, UK) that has been culturally eutrophied (present TP > 200 lg L 21 ), but has undergone recent reductions in nutrient loading. We compare multi-year dynamics of OC fluxes using sediment traps to longer-term burial rates estimated from two 210 Pbdated sediment cores. The recent sediment record demonstrates that most of the autochthonous OC is preserved ( 95% of OC captured in the deep trap and 86% of the NEP in the contemporary system), contrary to widely held assumptions that this more labile, algal-dominated OC component is not well preserved in lake sediments. A revised method for calculating BE for lakes which have undergone changes in primary productivity in recent decades is developed, which reduces some of problems inherent in existing approaches using historical sediment records averaged over the last 25-150 yr. We suggest that an appreciation of lakes in all biomes as ecosystems responding dynamically to recent human impact and climate change (for example) can improve up-scaled regional and global estimates of lake OC burial.

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“…The previous studies have addressed the lake's water and nutrient budgeting (see Krivtsov et al 2001bKrivtsov et al , 2002b and references therein), and there is an impressive long term monitoring record of the lake's planktonic community (e.g. Pearsall 1923;Griffiths 1925;Lind 1944;David 1963;Belhcher and Storey 1968;Reynolds and Rogers 1976;Reynolds 1978;Reynolds and Bellinger 1992;Sigee and Holland 1997;Sigee et al 1998Sigee et al , 1999aKrivtsov et al 1999cKrivtsov et al , f, 2000bKrivtsov et al , 2001cKrivtsov et al , 2002 and water chemistry (e.g.…”

Section: Introductionmentioning

confidence: 99%

Importance of biological and abiotic factors for geochemical cycling in a freshwater eutrophic lake

Krivtsov

Sigee

2005

Biogeochemistry

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Here we report the results of a comprehensive biogeochemical monitoring of Rostherne Mere in 1998, including changes in dissolved oxygen, organic carbon and nitrogen, nitrate/nitrite, ammonia, Al, Na, S, K, Mg, Ca, Si, Fe, Mn, orthophosphate, particulate N & P, suspended solids, temperature, pH, chlorophyll-a and zooplankton. The results demonstrated the major influence of primary producers on the overall geochemical cycling of N, P and Si, and suggested that the significance of zooplankton might have been previously underestimated. For major anions and cations, however, the influence of biota on lake water concentrations appeared to be negligible, reflecting the fact that these chemicals were present far in excess of plankton requirements. Thus changes in concentrations of Ca, K, Na, Mg and S were rather limited and must have reflected changes in hydrological and meteorological parameters. K, however, demonstrated a transitional pattern, reflecting some influence of biological uptake. During the stratification period, the slow processes of bacterial decomposition in the hypolimnion gradually released chemicals contained in the materials accumulated in the bottom layer, remarkably increasing the concentrations of dissolved compounds of those elements present in amounts comparable with the pool stored in the sedimenting detritus (e.g. orthophosphate P, ammonia N, Si and DOC). The decomposition also resulted in a drop in the redox potential, followed by partial denitrification and chemical release from the sediments. The hypolimnion of the Mere was confirmed to remain at the stage of Mn release, characterised by accumulation of DOC, orthophosphates, ammonia and initial stages of denitrification. High levels of P released from the sediments during the stratification period suggest that the lake's recovery after sewage diversion might be further delayed.

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Determination of P Release from Rostherne Mere Sediment Cores

Cited by 13 publications

References 6 publications

Benthic nutrient fluxes in a eutrophic, polymictic lake

Benthic nutrient fluxes in a eutrophic, polymictic lake

The historical dependency of organic carbon burial efficiency

Importance of biological and abiotic factors for geochemical cycling in a freshwater eutrophic lake

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