Particulate and Dissolved Phosphorus Forms in Freshwater: Composition and Analysis

Broberg, Ola; Persson, Gunnar

doi:10.1007/978-94-009-3109-1_6

Cited by 29 publications

(21 citation statements)

References 95 publications

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“…The distinction between dissolved and particulate P is arbitrary (Lazzarotto et al 2005); dissolved P is operationally defined as the fraction that passes through a 0.45-mm cellulose membrane filter (Broberg and Persson 1988). This division excludes colloids, which are an ill-defined group of high molecular weight substances that do not fit into either class.…”

Section: Sampling and Analytical Methodsmentioning

confidence: 99%

Bioavailable phosphorus transport from a hillslope cropland of purple soil under natural and simulated rainfall

Gao

Zhu

Wang

et al. 2009

Environ Monit Assess

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To further understand the mechanism of bioavailable total P (BAP) and bioavailable dissolved P (BDP) transport by overland and subsurface flow, we exposed a runoff plot 4.5 m long × 1.5 m wide × 0.6 m deep to simulated and natural rainfall in order to study the effects of rainfall type, rainfall intensity, and vegetation cover on BAP and BDP transport. The results showed that vegetation cover could alleviate the discharge of overland flow and sediment transport and enhance subsurface flow. BAP transport significantly increased with elevated rainfall intensity. Vegetation cover reduced the BAP transport by overland flow and increased it by subsurface flow. BDP transport showed no significant relationship with vegetation cover and rainfall type. The bioavailable particulate P (BPP) transport by overland flow contributed to no less than 90% by weight of total BAP, and the BPP transport by subsurface flow contributed to no less than 60% by weight of total BAP. Short-time heavy rainfall caused more BAP transport and accelerated non-point source pollution.

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Section: Sampling and Analytical Methodsmentioning

confidence: 99%

Bioavailable phosphorus transport from a hillslope cropland of purple soil under natural and simulated rainfall

Gao

Zhu

Wang

et al. 2009

Environ Monit Assess

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“…A widely used method in freshwater habitats, but less so in marine ecosystems, is gel chromatography, usually employing Sephadex® gels. This provides for the separation of HMW-P (>5 kDa), including colloids, in the "void volume" from IMW (>400 Da but <5 kDa) and LMW (<400 Da) fractions (Broberg and Persson, 1988). Matsuda and Maruyama (1985) used Sephadex G-25 gel chromatography to characterize the DOP pool in coastal waters of Tokyo Bay.…”

Section: A Molecular Weight Characterization Of the Dop Poolmentioning

confidence: 99%

Dynamics of Dissolved Organic Phosphorus

Karl

Björkman

2015

Biogeochemistry of Marine Dissolved Organic Matter

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“…This physical cut-off means that a fraction of colloids is also included in TDP (Broberg & Persson, 1988).…”

Section: Bioavailability Of Dissolved Phosphorusmentioning

confidence: 99%

“…The dissolved compounds in a large number of lakes and streams in New Zealand were separated according to 'molecular weight' by gel chromatography (cf. Broberg & Persson, 1988) and the fractions analysed for DRP. In some of the waters studied, especially the eutrophic ones, the majority of DRP was analysed in the high molecular weight fractions, whereas in other waters (oligotrophic waters) DRP was found only in the fractions eluting in orthophosphate position (White & Paine, 1980).…”

Section: Identijication and Characterization Of Bioavailable Dissolvementioning

confidence: 99%

Bioavailability of different phosphorus forms in freshwater systems

Boström

Persson²,

Broberg³

1988

Hydrobiologia

Self Cite

196

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The recent literature on the bioavailability of different forms of P in freshwater systems is reviewed. Bioavailable P is defined as the sum of immediately available P and the P that can be transformed into an available form by naturally occurring processes. Methods used to estimate the bioavailable P pool, which vary between studies largely depending on the time perspective applied, are critically evaluated. Most studies on particulate P aim to determine the potentially available P pool. Potential bioavailability of particulate P is normally analysed in bioassays with algal yield determinations and the available P fraction is characterized from interpretations of results of sequential chemical extractions. NaOHextractable P is in most studies the most algal-available P fraction. For soil samples and 'tributary water particulate matter, NaOH-P has often been found to be equal to algal extractable P. In other studies depletions of NaOH-P have accounted for the algal P uptake, but only a minor proportion of the fraction has been utilized. Organic P in lake water particulate matter and bed sediments of eutrophic lakes can also be algal-available to a significant extent.Studies on the bioavailability of dissolved P have often been concerned with immediate availability, or the minimum amount of available P. Such studies need other types of experimental design and normally assays with radiotracers are used. Immediately available P is frequently found to be less than P chemically assessed as dissolved reactive P (DRP) at low (< 10 pg DRP * l-') concentrations. However, immediate availability may also approach or exceed DRP concentrations, especially at higher concentrations. Potential bioavailability, assayed as for particulate P, may generally render higher bioavailability than P assayed as immediately available. Large fractions of dissolved P remain unutilized and are primarily found in the high molecular weight fraction of dissolved P. Introductionthe total P load on lakes will be available to the lake biota for production of organic matter. In Empirical relations between phosphorus loading, recent years increased attention has therefore phosphorus concentrations and algal biomasses been paid to determinations of the bioavailable or in lakes are normally based on total phosphorus, algal-available proportion of P from different cf. the OECD report on eutrophication of waters sources, with the aim of improving understanding (OECD, 1982). However, it is well known, and of P cycling in lakes, refining empirical models or also stated in the OCED report, than only part of improving lake management strategies.

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Particulate and Dissolved Phosphorus Forms in Freshwater: Composition and Analysis

Cited by 29 publications

References 95 publications

Bioavailable phosphorus transport from a hillslope cropland of purple soil under natural and simulated rainfall

Bioavailable phosphorus transport from a hillslope cropland of purple soil under natural and simulated rainfall

Dynamics of Dissolved Organic Phosphorus

Bioavailability of different phosphorus forms in freshwater systems

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