Effects of hypolimnetic oxygenation on water quality: results from five Danish lakes

Liboriussen, Lone; Søndergaard, Martin; Jeppesen, Erik; Thorsgaard, Inge; Grünfeld, Simon; Jakobsen, Tue Stenholm; Hansen, Kim

doi:10.1007/s10750-009-9705-0

Cited by 56 publications

(32 citation statements)

References 39 publications

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“…The only efficient long-term measure to reduce summer anoxia and reestablish lake ecosystems is the reduction of anthropogenic nutrient loads or external organic loadings. A similar conclusion was found by Liboriussen et al (2009) regarding oxygenation to prevent anoxia and concurrent hypolimnetic NH z 4 accumulation, by Moosmann et al (2006) and Gä chter and Wehrli (1998) regarding oxygenation and artificial mixing to reduce lakeinternal P loading, by Annadotter et al (1999) regarding sediment dredging to reduce lake-internal P loading, and by Mü ller and Stadelmann (2004) regarding oxygenation and artificial mixing to improve conditions for egg survival of bottom-spawning fish. Nevertheless, the previously mentioned lake management measures can provide temporary relief from negative effects of anoxia.…”

Section: Discussionsupporting

confidence: 62%

Hypolimnetic oxygen consumption by sediment‐based reduced substances in former eutrophic lakes

Matzinger

Müller

Niederhauser³

et al. 2010

Limnology & Oceanography

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We quantified the areal hypolimnetic mineralization rate (AHM; total areal hypolimnetic oxygen depletion including the formation of reduced substances) in two formerly eutrophic lakes based on 20 yr of water-column data collected during oligotrophication. The upward diffusion of reduced substances originating from the decomposition of organic matter in the sediment was determined from pore-water profiles and related to the time of deposition. More than 80% of AHM was due to degradation of organic matter in the water column (including sediment surface) and diffusion of reduced substances from sediment layers younger than 10 yr. Sediments older than 10 yr, including the eutrophic past, accounted for , 15% of AHM. This ''old'' contribution corresponds to a 20-43% fraction of the total sediment-based AHM. The contribution from old sediment layers to AHM is expected to be even lower in lakes with deeper hypolimnia (. 12 m). In summary, oxygen consumption in stratified hypolimnia is controlled mainly by the present lake productivity. As a result, technical lake management measures, such as oxygenation, artificial mixing, or sediment dredging, cannot efficiently decrease the flux of reduced substances from the sediment.In deep stratified lakes there is generally a clear correlation between lake productivity and areal hypolimnetic oxygen depletion rate (AHOD; g O 2 m 22 d 21 ), as first shown by Hutchinson (1938). Consequently, eutrophication leads to an increase in AHOD (Rast and Lee 1978; Chapra and Canale 1991) and potentially low dissolved oxygen (DO) levels in the hypolimnion during summer stratification. Low hypolimnetic DO can in turn have a serious effect on biological processes, either via direct toxicity on fish and bottom organisms (Kalff 2002) or indirectly via toxic by-products of anaerobic mineralization (Wang and Chapman 1999). Moreover, it has been shown that hypolimnetic anoxia can enhance the sediment release of soluble reactive phosphorus (P; Larsen et al. 1981;Hupfer and Lewandowski 2008), although the DO concentration at the sediment-water interface is not the only controlling factor (Moosmann et al. 2006).As a result, reaching or maintaining a sufficient hypolimnetic DO level is often a focus of lake management. Commonly used approaches focus on (1) the reduction of external P loading (Gä chter and Wehrli 1998), (2) increased DO supply to the hypolimnion through oxygenation or aeration (Singleton and Little 2006) or through artificial mixing in winter (Mü ller and Stadelmann 2004), or (3) the removal of accumulated deposits of organic matter through sediment dredging (Annadotter et al. 1999). However, in many lakes AHOD decreased only slowly following the reduction of external P sources and the subsequent decrease in lake productivity. Such a resilience of AHOD during oligotrophication was observed in Lake Shagawa (Larsen et al. 1981) and Lake Eire (Charlton et al. 1993). A similar effect was described by Matthews and Effler (2006) for Lake Onondaga, where an abrupt decrease in anthropogeni...

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Section: Discussionsupporting

confidence: 62%

Hypolimnetic oxygen consumption by sediment‐based reduced substances in former eutrophic lakes

Matzinger

Müller

Niederhauser³

et al. 2010

Limnology & Oceanography

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“…Nitrate and oxygen enhance P retention in sediments only under special geochemical circumstances (mobility or surplus of iron). In many cases, oxidation has not shown expected results (Liboriussen et al, 2009).…”

Section: Internal Measuresmentioning

confidence: 97%

Lakes and Reservoirs

Uhlmann

Paul

Hupfer³

et al. 2011

Treatise on Water Science

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“…Oxygenation creates an increased mobile phosphorus pool at the sediment surface that may be released when oxygenation is halted (Liboriussen et al 2009). Our results show that this phenomenon is important and occurs within a few days of suspending oxygenation.…”

Section: Temporary Increase In Srp Release Rate After Oxygenation Is mentioning

confidence: 99%

Short-term variation in benthic phosphorus transfer due to discontinuous aeration/oxygenation operation

et al. 2016

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The short-term dynamics of soluble reactive phosphorus (SRP) transport across the sediment surface in a brackish lake due to discontinuous aeration and oxygenation operations were investigated using laboratory and field experimental and analytical procedures. According to a laboratory incubation experiment using intact sediment cores, SRP release from the sediment was clearly suppressed by aeration, and substantial negative SRP transfer was observed during oxygenation treatment, while a positive value was observed for N 2 bubbled cores. A remarkable but impermanent increase in SRP release rate was observed within 1 or 2 days of discontinuing the aeration and oxygenation, respectively, and the release rate rapidly deceased to a quasi-steady value under N 2 bubbling conditions. An analytical model could quantitatively reproduce these laboratory experimental results for anoxic and aerated conditions, showing that this impermanent increase was attributable to the rapid release of accumulated SRP in the oxic surface layer of the sediment. Field experiments using an in situ oxygenator showed the same tendency as the laboratory experiments, but with much larger values of the benthic SRP transfer rate. Overall, the short-term dynamics of benthic SRP transport caused by discontinuous aeration and oxygenation are considered to be an important process for the phosphorus cycle in the field.

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Effects of hypolimnetic oxygenation on water quality: results from five Danish lakes

Cited by 56 publications

References 39 publications

Hypolimnetic oxygen consumption by sediment‐based reduced substances in former eutrophic lakes

Hypolimnetic oxygen consumption by sediment‐based reduced substances in former eutrophic lakes

Lakes and Reservoirs

Short-term variation in benthic phosphorus transfer due to discontinuous aeration/oxygenation operation

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