Water pH and sediment resuspension regulating internal phosphorus loading in a shallow lake – field experiment on diurnal variation

Niemistö, Juha; Holmroos, Heidi; Horppila, Jukka

doi:10.4081/jlimnol.2011.3

Cited by 22 publications

(11 citation statements)

References 31 publications

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“…High pH value in the water can induce P release from aerobic sediments by OH 2 exchange with PO 32 4 on the surfaces of metal oxideshydroxides (Seitzinger 1991;Steinberg 2011). Xie et al (2003) stated that cyanobacterial bloom in freshwater systems induced sediment P release in summer, which was mediated by high pH caused by intense algal photosynthesis and depressed concentrations of nitrate N. Similar results were observed in the Lake Hiidenvesi subjected to strong phytoplankton blooms (Niemistö et al 2011). In this study, the water column was under oxidation condition during the incubation (Figure 3(B)).…”

Section: Discussionsupporting

confidence: 73%

“…Niemistö et al (2011) made a comparison between the day and night experiments, and found that water pH also can stay at a high level at night during strong phytoplankton blooms. In this study, Chaetomorpha growth resulted in a large increase in water pH during the 30-day incubation, and there were significant differences between the treatments with high P and low P concentrations (P , 0.05).…”

Section: Discussionmentioning

confidence: 99%

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Influence of outbreak of macroalgal blooms on phosphorus release from the sediments in Swan Lake Wetland, China

Gao

Wei

et al. 2013

Plant Biosystems - An International Journal Dealing with all As

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Macroalgal blooms have occurred worldwide frequently in coastal areas in recent decades, which dramatically modify phosphorus (P) cycle in water column and the sediments. Rongcheng Swan Lake Wetland, a coastal wetland in China, is suffering from extensive macroalgal blooms. In order to verify the influence of macroalgal growth on sediment P release, the sediments and filamentous Chaetomorpha spp. were incubated in the laboratory to investigate the changes of water quality parameters, P levels in overlying water, and sediments during the growth period. In addition, algal biomass and tissue P concentration were determined. In general, Chaetomorpha biomasses were much higher in high P treatments than in low P treatments. Compared with algae þ low P water treatment, the addition of sediments increased the algal growth rate and P accumulation amount. During the algal growth, water pH increased greatly, which showed significant correlation with algal biomass in treatments with high P (P , 0.05). P fractions in the sediments showed that Fe/Al -P and organic P concentrations declined during the algal growth, and great changes were observed in algae þ low P water þ sediment treatment for both. As a whole, the sediments can supply P for Chaetomorpha growth when water P level was low, and the probable mechanism was the release of Fe/Al -P at high pH condition induced by intensive Chaetomorpha blooms.

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Section: Discussionsupporting

confidence: 73%

Section: Discussionmentioning

confidence: 99%

Influence of outbreak of macroalgal blooms on phosphorus release from the sediments in Swan Lake Wetland, China

Gao

Wei

et al. 2013

Plant Biosystems - An International Journal Dealing with all As

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“…The spatial variation in phosphate (PO 4 -P) concentration in the Rufiji Delta is most likely an outcome of both natural and anthropogenic activities. High temperature in surface water stimulates mineralisation processes that liberate the organic-bound P fraction (Niemistö et al 2011). The spatial variation in PO 4 -P is also affected by the mixing of fresh water with seawater as well as replenishment as a result of microbial decomposition of organic matter (Paytan and McLaughlin 2007).…”

Section: Nutrient Inputsmentioning

confidence: 99%

Spatial variation of nutrients and primary productivity in the Rufiji Delta mangroves, Tanzania

Minu

Routh

Machiwa

et al. 2020

African Journal of Marine Science

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Determinations of spatial and temporal variations in organic matter and nutrient dynamics in water and sediments are crucial for understanding changes in aquatic bodies. In this study, we (i) determine the spatial dynamics of dissolved inorganic nutrients, during the transition from the dry to the rainy season, and (ii) provide future productivity predictions for the Rufiji Delta mangroves, Tanzania, based on the input of various nutrients. Water samples were collected from six locations, three times per year between April 2012 and January 2014, and analysed for dissolved nutrients, total organic and inorganic carbon, chlorophyll a, chlorophyll b and total carotenoids. The prediction of future net primary productivity in the Rufiji mangroves was undertaken using the software STELLA. The mean nutrient concentrations were of the order: nitrate > phosphate > ammonium > silica > dissolved organic carbon. The study revealed that high nutrient concentrations occurred in the northern part of the Rufiji Delta as a result of anthropogenic influence in the watershed. Modelling of nutrient inputs into the delta indicated enhanced primary productivity, which is expected to increase the vulnerability of water quality in the near future due to eutrophication.

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“…Phosphorus in both the water column and sediment is continuously being assimilated into the biomass and then released again by the decomposition within a short time interval and the net release result can be very variable (Boström et al, 1988a). Moreover, the exchange of P between resuspended particles and surrounding water phase, adsorption-desorption reaction, is affected by the concentration and P saturation of solids, particle-size distribution, redox conditions, pH, CaCO 3 content, and organic carbon (Berkheiser et al, 1980;Boström et al, 1982Boström et al, , 1988aDrake & Heaney, 1987;Holmroos et al, 2009;Niemistö et al, 2011). Therefore, it is difficult to know how many times a phosphate ion will have been assimilated or dissimilated as well as chemically released or bound before entering our sediment trap in particulate form.…”

Section: Budget Calculations Versus Resuspension Measurementsmentioning

confidence: 96%

Sediment resuspension: rescue or downfall of a thermally stratified eutrophic lake?

et al. 2012

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The aim of this study was to estimate the effect of sediment resuspension, a common phenomenon in many lakes, on the phosphorus budget of a eutrophicated lake. We used two different approaches, mass balance calculations and spatially comprehensive resuspension measurements, to determine the level of phosphorus loading from which rehabilitation action is started in a dimictic north temperate lake. The effect of resuspension was assumed to be significant, since it often is a governing process for cycling of material in lakes. Internal loading was multifold to that of external loading as determined by the budget calculation. Spatially comprehensive sedimentation and resuspension measurements were necessary, since deep site versus spatially comprehensive measurements had a marked difference in their results. Resuspension of P slightly exceeded the internal loading assessed by budget calculations and thereby proved its significance as a governing in-lake process that influences P cycling strongly. The shallow areas were of importance, since most of the total P load originated from there. The fate of P after resuspension depends on the retention capacity of resuspended particles in addition to prevailing biological and physico-chemical conditions. Therefore, sediment resuspension can either strengthen or diminish internal nutrient load and the processes of the shallow zones are of importance.

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Water pH and sediment resuspension regulating internal phosphorus loading in a shallow lake – field experiment on diurnal variation

Abstract: Resuspension-mediated aerobic release of P can be crucial to the phosphorus cycling of a shallow lake.

Cited by 22 publications

References 31 publications

Influence of outbreak of macroalgal blooms on phosphorus release from the sediments in Swan Lake Wetland, China

Influence of outbreak of macroalgal blooms on phosphorus release from the sediments in Swan Lake Wetland, China

Spatial variation of nutrients and primary productivity in the Rufiji Delta mangroves, Tanzania

Sediment resuspension: rescue or downfall of a thermally stratified eutrophic lake?

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