Characterisation and quantification of phosphorus release from profundal bottom sediments in two dimictic lakes during summer stratification

Selig, Uwe; Schlungbaum, G.

doi:10.4081/jlimnol.2003.151

Cited by 22 publications

(18 citation statements)

References 51 publications

(50 reference statements)

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“…Sediment resuspension has been described as a potential source of nutrients for phytoplankton in shallow lakes (Carper & Bachmann 1984;Canfield & Hoyer 1988;Hamilton & Mitchell 1997). In Lake Dudinghausen, P can be released from the sediment under anoxic conditions only in the hypolimnion during summer stratification (Selig & Schlungbaum 2003).…”

Section: Trophic Levelmentioning

confidence: 99%

Assessing P status and trophic level of two lakes by speciation of particulate phosphorus forms

Selig¹,

Michalik²,

Hübener³

2006

J Limnol

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Section: Trophic Levelmentioning

confidence: 99%

Assessing P status and trophic level of two lakes by speciation of particulate phosphorus forms

Selig¹,

Michalik²,

Hübener³

2006

J Limnol

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“…The theoretical molecular diffusion rate from the sediment to the hypolimnion was higher in Lake Dudinghausen than in Lake Tiefer, but the mean accumulation rate of SRP in the hypolimnion was lower. By including PP from the phototrophic sulfur bacterial layer in the calculation, the accumulation rate of P in Lake Dudinghausen was in the same order of magnitude as calculated by Selig and Schlungbaum (2003), suggesting that the occurrence of phototrophic sulfur bacteria might be a factor in decreasing the apparent trophic status of Lake Dudinghausen.…”

Section: P Distribution and P Balance In The Dimictic Lakesmentioning

confidence: 51%

“…SRP-release and polyP accumulation in phototrophic sulfur bacteria SRP was released from the anoxic sediments in both lakes (Selig and Schlungbaum, 2003). In addition, SRP release was limited by redox conditions in the whole hypolimnion of Lake Tiefer.…”

Section: Discussionmentioning

confidence: 99%

“…It seems likely that phototrophic sulfur bacteria in Lake Dudinghausen can limit SRP-transport from the hypolimnion to the epilimnion during late summer. Selig and Schlungbaum (2003) calculated the benthic P-release by different mathematical methods for both lakes. The theoretical molecular diffusion rate from the sediment to the hypolimnion was higher in Lake Dudinghausen than in Lake Tiefer, but the mean accumulation rate of SRP in the hypolimnion was lower.…”

Section: P Distribution and P Balance In The Dimictic Lakesmentioning

confidence: 99%

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Vertical gradient of nutrients in two dimictic lakes ? influence of phototrophic sulfur bacteria on nutrient balance

et al. 2004

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Vertical profiles of soluble and particulate nutrients were analyzed at the end of summer stratification in two dimictic lakes located in northeast Germany. In addition, irradiance and plankton biomass were determined. The concentrations of particulate organic carbon and phytoplankton biomass in the epilimnion were higher in Lake Tiefer than in Lake Dudinghausen, even though the apparent trophic status of Lake Tiefer was higher than Lake Dudinghausen. In Lake Dudinghausen, phototrophic sulfur bacteria accumulated in the hypolimnion between 8 and 10 m, whereas in Lake Tiefer low light penetration prevented the development of phototrophic bacteria in those horizons in which sulfide might be present. Because both lakes have anoxic hypolimnia, we assumed that in both cases phosphorus was released from the sediment Aquatic Sciences into the hypolimnion. In Lake Tiefer, redox conditions and the presence of nitrate and nitrite limited the water depth range in which P-release occurred. In Lake Dudinghausen, part of the released soluble reactive phosphorus was incorporated into the phototrophic sulfur bacteria biomass and thus transformed to particulate phosphorus. As much as 70% of the particulate phosphorus in the hypolimnion was found in the phototrophic sulfur bacterial layer, with 15 -20 % of this particulate phosphorus consisting of polyphosphate storage compounds. The low ratio of soluble reactive phosphorus to particulate phosphorus in the hypolimnion was, therefore, attributed to phototrophic sulfur bacteria. The phototrophic sulfur bacteria appear to act as an internal nutrient filter and convert soluble reactive phosphorus into particulate phosphorus.

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“…The increased TP in the metalimnium is thought to be correlated to growth of biomass. Values measured in depth presumably depend of loading from the sediment during anoxic condition 22 .…”

Section: Nutrientsmentioning

confidence: 99%

Water Quality of Two Glacial Alpine Italian Lakes

Zelano

Zambrotta

Defilippi³

et al. 2005

Annali di Chimica

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The purpose of this study was to characterize, in a period of one year, two glacial lakes, Alice and Meugliano, located in an alpine reservoir on the basis of physical and chemical features. The two lakes show two periods of mixing: one in the spring and one in the autumn, so can be classified as dimictic lakes. They are characterized by pH, alkalinity, low conductivity and and quite dilute ionic concentrations. With regard to nutrients, most nitrogen occurred in the nitric form in the superficial layers. During the period of thermal stratification, in the anoxic layer NO3- decreases and NH4+ increases, confirming the activity of the anaerobic denitrificant bacteria. Total and soluble phosphorus levels show homogeneity during the cold period at different depths, while with stratification concentrations increase in the hypolimnium and metalimnium. In both lakes there is an inverse correlation between transparency and chlorophyll a. To evaluate the trophic state the conventional criteria of Nurnberg 2 and four lake trophic indices (TSIs) are used. Both evaluations suggest that the two lakes are eutrophic, with worse conditions in Alice. Deviations of the trophic states, based on the relation between TSIs, indicate that factors other than phosphorous limit the algal biomass, and that non-algal particles influence light attenuation

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Characterisation and quantification of phosphorus release from profundal bottom sediments in two dimictic lakes during summer stratification

Abstract: Phosphorus release from the sediment in two dimictic lakes was compared during the summer stratification.

Cited by 22 publications

References 51 publications

Assessing P status and trophic level of two lakes by speciation of particulate phosphorus forms

Assessing P status and trophic level of two lakes by speciation of particulate phosphorus forms

Vertical gradient of nutrients in two dimictic lakes ? influence of phototrophic sulfur bacteria on nutrient balance

Water Quality of Two Glacial Alpine Italian Lakes

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