Phosphorus fractions and profiles in the sediment of shallow Danish lakes as related to phosphorus load, sediment composition and lake chemistry

Søndergaard, Martin; Windolf, Jørgen; Jeppesen, Erik

doi:10.1016/0043-1354(95)00251-0

Cited by 138 publications

(89 citation statements)

References 20 publications

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“…This has been shown in the upper 10-20 cm of sediments from 32 shallow meso-to hyper-trophic Danish lakes (Sondergaard et al, 1996). In addition, in the Mejean Lagoon in France, the springtime rise in temperature reactivated the decomposition of the macroalgal biomass that had accumulated during autumn.…”

Section: Discussionmentioning

confidence: 96%

Phosphorus fractions and alkaline phosphatase activity in sediments of a large eutrophic Chinese lake (Lake Taihu)

et al. 2008

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Spatial, vertical, and seasonal variations in phosphorus fractions and in alkaline phosphatase activity (APA) were investigated in sediments in a large-shallow eutrophic Chinese lake (Lake Taihu) in [2003][2004]. The phosphorus content was highest in the most seriously polluted lake area. Iron-bound phosphorus (Fe(OOH)*P) dominated (47% on average) among the phosphorus fractions determined according to Golterman (Hydrobiologia 335:87-95, 1996). Notably, organically-bound P comprised a further significant additional portion (acid-soluble + hot NaOH-extractable organic P = 25%), which was highest at the most polluted sites. The Fe(OOH)*P content was the lowest in spring (April, 2004), suggesting that degradation of organic matter led to the release of iron-bound phosphates. Sediment APA showed a significant positive relationship with both organically-bound P and Fe(OOH)*P. Consequently, organically-bound P is an important portion of the sediment phosphorus in Lake Taihu. It is mainly derived from freshly-settled autochthonous particles and from external discharges. Organicallybound P induces APA and may lead to the release of bioavailable phosphates from the organic sediments, thereby accelerating lake eutrophication.

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Section: Discussionmentioning

confidence: 96%

Phosphorus fractions and alkaline phosphatase activity in sediments of a large eutrophic Chinese lake (Lake Taihu)

et al. 2008

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“…Diagenesis of poly-P-Because organic phosphorus compounds are supplied to the sediment surface and mineralized by heterotrophic decomposition, they decrease with increasing sediment depth (e.g., Hupfer et al 1995a;Penn et al 1995;Søndergaard et al 1996). Bacteria are able to synthesize and store poly-P in an aerobic environment, which is normally restricted to the uppermost few millimeters of the sediment.…”

Section: Discussionmentioning

confidence: 99%

Origin and diagenesis of polyphosphate in lake sediments: A 31PߚNMR study

Hupfer

Ruübe

Schmieder³

2004

Limnology & Oceanography

170

164

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Polyphosphate (poly-P) was detected with the use of 31 P nuclear magnetic resonance (NMR) spectroscopy in sediments from a large variety of lakes with different trophic state and morphometry. In the top 0.5 cm of sediment, poly-P was 1.5 to 11.4% of total P. Nonreactive phosphorus (NRP) in the NaOH fraction (often classified as organically bound phosphate) was up to 46% inorganic poly-P. In some surface sediments, the poly-P content equalled the iron-fixed phosphorus determined by chemical phosphorus fractionation. Sediments were probably supplied with poly-P by sedimentation because there were substantial amounts of poly-P in plankton and settling seston. As demonstrated with sediments of Lake Petersdorf, benthic organisms can also contribute to the formation of poly-P (up to 0.11 mg P [g dry weight]Ϫ1 ) under favorable aerobic conditions. Poly-P is more rapidly transformed into single orthophosphate during diagenesis than other inorganic and organic P species. The transformation of organic P compounds and poly-P can contribute significantly to the release of P during diagenesis and should be considered along with the reductive dissolution of P sorbed to iron oxihydroxides.Microbially induced changes in pH and redox potential affect the ability of lake sediments to retain inorganic phosphorus (Roden and Edmonds 1997; Gächter and Müller 2003). Although these changes are driven by organic matter decomposition, the direct role of sediment bacteria by the release of organically bound phosphorus often has been ignored. Many studies have shown that a substantial proportion of phosphorus in settling seston originates from biomass (e.g., Hupfer et al. 1995a;Pettersson 2001;Kleeberg 2002). The decreasing content of these organic P species in settled particles during early benthic diagenesis indicates that heterotrophic sediment bacteria mineralize sedimentary organic P to inorganic P (Wetzel 1999). However, some of the supplied P is assimilated during microbial growth. Studies with activated sludge and with mixed or pure cultures have shown that several types of microorganisms are able to take up P excessively and form intracellular polyphosphate (poly-P; Wentzel et al. 1991). In waste water treatment plants with biological P elimination, poly-P-accumulating organisms are dominant under oscillating redox conditions. AcknowledgmentsWe thank Christiane Herzog for her help with the analytical work. René Gächter, Roland Psenner, Jörg Lewandowski, and two anonymous reviewers are acknowledged for critical reading and helpful comments on a former version of the manuscript. Sarah Poynton is acknowledged for the linguistic improvements of the text.

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“…In contrast, geochemical estimates of past lake water [TP] that are derived directly from phosphorus (P) stored in lake sediments are often problematic as a result of the highly mobile and labile nature of P, which frequently results in variable retention in the sediment and post-depositional, upward migration (Carignan and Flett 1981;Reitzel et al 2007). This may result in a falsely recorded increase in [TP] upcore (Anderson et al 1993;Søndergaard et al 1996;Trolle et al 2009), and therefore these geochemical data are rarely a reflection of water column [TP]. Therefore, DI-TP models have become the standard for paleolimnological studies on cultural eutrophication (Hall and Smol 1992;Bennion et al 2004;see Hall and Smol [2010] for a review).…”

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confidence: 99%

Reorganization of algal communities in the Lake of the Woods (Ontario, Canada) in response to turn‐of‐the‐century damming and recent warming

Rühland

Paterson

Hargan

et al. 2010

Limnology & Oceanography

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Paleolimnological approaches were used to assess the ecological and environmental implications of diatom assemblage compositional changes recorded over the last , 200 yr from four sites in the Lake of the Woods (LoW), Ontario, Canada. Comparisons between a reference site (Whitefish Bay) and three disturbed sites (Bigstone Bay, Paleolimnological Project site No. 1, and Forrest Island) provide insights into the effects that multiple stressors (dam construction, total phosphorus [TP] changes, and recent warming) have had on the ecology of this highly complex freshwater system. Overall patterns of diatom compositional changes from highresolution 210 Pb-dated sediment cores revealed a strong temporal coherence ca. 1910 and then again over the last few decades among all sites. Hydromanagement activities at the turn of the 19th century and recent warming over the last few decades played key roles in the LoW diatom changes. Diatom compositional changes at all sites were significantly related to trends in nearby air temperature records over the past century and to changes in lake ice phenology over the past , 40 yr from Whitefish Bay. Turn-of-the-century hydromanagement activities do not appear to have had long-term effects on diatom-inferred TP (DI-TP), particularly at the disturbed sites. Clear decreases in DI-TP over the last few decades were evident at all sites, but at the reference site these decreases were well below pre-disturbance levels, which we link in part to recent warming. Substantial changes in climate will amplify the effects of multiple stressors on lake water properties that have major implications on algal communities.

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Phosphorus fractions and profiles in the sediment of shallow Danish lakes as related to phosphorus load, sediment composition and lake chemistry

Cited by 138 publications

References 20 publications

Phosphorus fractions and alkaline phosphatase activity in sediments of a large eutrophic Chinese lake (Lake Taihu)

Phosphorus fractions and alkaline phosphatase activity in sediments of a large eutrophic Chinese lake (Lake Taihu)

Origin and diagenesis of polyphosphate in lake sediments: A 31PߚNMR study

Reorganization of algal communities in the Lake of the Woods (Ontario, Canada) in response to turn‐of‐the‐century damming and recent warming

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