Particulate and dissolved phosphorus forms in freshwater: composition and analysis

Broberg, Ola; Persson, Gunnar

doi:10.1007/bf00024899

Cited by 60 publications

(11 citation statements)

References 114 publications

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“…Phosphorus was essentially present in organic form (90%), similar to the proportions reported in other studies (Broberg and Persson, 1988;Turner et al, 2003). Orthophosphates represented less than 1% of the total phosphorus.…”

Section: Discussionsupporting

confidence: 88%

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Effects of wastewater treatment plant pollution on in-stream ecosystems functions in an agricultural watershed

Sánchez‐Pérez

Gérino²,

Sauvage³

et al. 2009

Ann. Limnol. - Int. J. Lim.

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-We studied the effect of point-source and non-point-source pollution on the retention capacity of the stream and its link with the metabolic state (primary production and respiration) and invertebrates assemblages in a third order Mediterranean stream. Two experimental sites were chosen: one in the upper part of the catchment (Monte´gut site) characterized by low concentrations in nitrate and phosphate and one in the lower part of the catchment (Le´zat site) characterized by high nitrate and phosphorus concentrations. Both experimental sites were located on reaches that included a Waste Water Treatment Plant (WWTP) point nutrient source allowing discussion of the relative effects of point-source and non-point-source nutrients loads on ecosystem function (respiration and uptake rates) and aquatic organism assemblages. NH 4 + -N, and PO 4 3x -P uptake rates were determined using solute additions conducted at constant rates (short-term nutrient addition procedure) and NO 3x -N uptake rates were determined using instantaneous solute addition (slug addition procedure). Rates of gross primary production (GPP) and ecosystem respiration were determined using the open system, two-stations diurnal oxygen change method. Benthic invertebrate communities were investigated for species and functional feeding groups diversities measurements. Results show that autotrophy in the river results from nutrients of two distinct origins: point sources for phosphorus (urban area and WWTP) and non-point sources for nitrogen (agricultural zones) with local additions from WWTP inputs.Comparison between the two sites shows that the WWTP did not affect uptake rates, respiration or primary production of the ecosystem in the low-nutrient Monte´gut reach despite increase of invertebrates communities biomass density. Inputs from the WWTP, in the high nitrate and phosphate Le´zat reach, increased respiration, lower benthic biomass and led to changes in the species composition and did not affect uptake rates.

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Section: Discussionsupporting

confidence: 88%

“…Orthophosphates represented less than 1% of the total phosphorus. In river systems, dissolved organic forms of phosphorus are readily available to the organisms (Broberg and Persson, 1988). TP and TDP increased in the downstream part of the basin where anthropogenic effects were stronger.…”

Section: Discussionmentioning

confidence: 99%

Effects of wastewater treatment plant pollution on in-stream ecosystems functions in an agricultural watershed

Sánchez‐Pérez

Gérino²,

Sauvage³

et al. 2009

Ann. Limnol. - Int. J. Lim.

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“…Since ditching operations are likely to increase the export of solids, the impact of ditch network maintenance appears greater when unfiltered samples are used in water analyses. The type and pore size of the filter also affects the results of water quality studies (Tarapchack et al 1982, Broberg andPersson 1988). Filters with a pore size of 0.45-0.50 μm are generally used by aquatic chemists to separate particulate matter from dissolved elements, but in ditching studies, somewhat coarser filters (1.0 μm porosity) are commonly used (Joensuu et al 1999(Joensuu et al , 2002.…”

Section: Introductionmentioning

confidence: 99%

“…Filters with a pore size of 0.45-0.50 μm are generally used by aquatic chemists to separate particulate matter from dissolved elements, but in ditching studies, somewhat coarser filters (1.0 μm porosity) are commonly used (Joensuu et al 1999(Joensuu et al , 2002. On the other hand, colloids can be sorped onto the filters and the effective pore size can become lower than the nominal size due to the clogging of the filter (Tarapchack et al 1982, Broberg andPersson 1988). The clogging effect may be a factor in the analysis of the peatland drainage waters, which are typically rich in finefractioned organic material.…”

Section: Introductionmentioning

confidence: 99%

Export of suspended solids and dissolved elements from peatland areas after ditch network maintenance in south-central Finland

Nieminen¹,

Ahti²,

Koivusalo³

et al. 2010

Silva Fenn.

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In Finland nearly 6 million hectares of peatlands are drained for forestry purposes. Ditch network maintenance in the drained peatlands, i.e. cleaning old ditches or digging complementary ditches, deteriorates surface water quality by increasing the export of dissolved elements and suspended solids (SS). Effect of ditch network maintenance on the export of SS, dissolved organic carbon (DOC), and dissolved nitrogen (N), phosphorous (P), iron (Fe), aluminum (Al) and manganese (Mn) was studied in nine pairs of treated and control (no maintenance) catchments located in southern and central Finland. In this study we extended the paired catchment approach by combining data from several catchments and identifying the treatment effect on SS and element loads from the entire dataset. Following the method of Laurén et al. (2009) we identified how uncertainty in correlation between treatment and control catchments during pre-treatment period is reflected in the estimated treatment effect on SS and element loads. In the experiment, the export of SS increased significantly for the four year study period following the ditch network maintenance and Al export increased for one year. The export of N, P and Fe was not significantly changed and DOC and Mn export decreased after the ditch maintenance operation.

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“…Nucleotides are rapidly hydrolyzed in lakewater, and have turnover times measurable in minutes (Bentzen and Taylor 1991;Bentzen et al 1992;Løvdal et al 2007). The presence of nucleic acids in lakewater and seawater, and their lability, has been recognized by previous researchers (Paul et al 1987;Broberg and and;Persson 1988;Matsui et al 2001;Björkman and Karl 2005;Read et al 2014).…”

Section: Discussionmentioning

confidence: 85%

Observations on the dynamics and fate of dissolved organic phosphorus in lake water and a new model of eplimnetic P cycling

Taylor

Lean²

2018

Aquat Sci

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Phosphorus (P) in lake water is commonly partitioned into particulate P and dissolved P by membrane filtration, and dissolved P is then fractionated into soluble reactive P (SRP, reactive with molybdate) and dissolved unreactive or organic P (DOP). Much of what is known about DOP is derived from radiotracer studies using gel chromatography, and summarized by a kinetic model (Lean, Science 179:678-680, 1973a; Lean, J Fish Res Board Can 30:1525-1536, 1973b. Since this work, several relevant discoveries have been made on the role of enzymes, viruses and zooplankton in regenerating dissolved P, and the role of filtration damage in generating dissolved P in filtrates. Herein we present the results of new radiotracer experiments on the fate of DOP in lake water filtrates, consistent with the hypothesis that some of the high molecular weight organic P breaks down spontaneously to smaller molecules, which in turn break down to PO 4 3− . We use inhibitors, including competitive inhibitors of phosphatases and a commercial product (RNA-later ® ) to support the hypothesis that the larger molecules include nucleic acids, and that the smaller molecules are substrates for alkaline phosphatase. We also find that colloidal P (i.e., P > 5000 MW according to gel filtration) includes some virus-sized material that can be collected on 0.02 or 0.03 µm filters. Finally, we provide a new model of the cycling of epilimnetic P that is consistent with these and earlier observations.

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Particulate and dissolved phosphorus forms in freshwater: composition and analysis

Cited by 60 publications

References 114 publications

Effects of wastewater treatment plant pollution on in-stream ecosystems functions in an agricultural watershed

Effects of wastewater treatment plant pollution on in-stream ecosystems functions in an agricultural watershed

Export of suspended solids and dissolved elements from peatland areas after ditch network maintenance in south-central Finland

Observations on the dynamics and fate of dissolved organic phosphorus in lake water and a new model of eplimnetic P cycling

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