Iron addition as a shallow lake restoration measure: impacts on charophyte growth

Immers, Anne; Sande, Masha T. van der; Zande, R.M. Van der; Geurts, J.J.M.; Donk, Ellen Van; Bakker, Elisabeth S.

doi:10.1007/s10750-011-0995-7

Cited by 27 publications

(9 citation statements)

References 39 publications

(54 reference statements)

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“…St. John, Potamogeton pectinatus L. 1753 (Immers et al 2014), P. acutifolius Link 1818, Stratiotes aloides L. 1753 (Van der Welle et al 2006, 2007b, Myriophyllum aquaticum (Vell.) Verdc (Kamal 2004) and the charophyte species Chara virgata Kützing 1834 and C. globularis Thuiller 1799 (Immers et al 2013). Experiments with macrophytes growing in industrial metal-rich areas (8.6 mg Fe L -1 in surface water and 0.75 mg Fe g -1 sediment of which 0.21 exchangeable Fe) also showed that aquatic macrophytes were able to grow well without showing any external abnormalities (Nayek et al 2010).…”

Section: Primary Producersmentioning

confidence: 98%

Lake restoration by in-lake iron addition: a synopsis of iron impact on aquatic organisms and shallow lake ecosystems

2015

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Internal phosphorus loading has become a major problem in many shallow freshwater lakes over the past decades due to the build-up of phosphorus stocks in the sediment. Iron is a natural capping agent which can enhance sediment P binding capacity, thus reducing P availability and shifting a lake from an algal to a macrophyte dominated state. Iron could, however, also impose toxic effects on the biota. We therefore provide a synopsis of iron toxicity studies and lake restoration measures using iron addition. Iron toxicity studies revealed that, even though iron is an essential nutrient for growth, when added in excess, it can negatively affect aquatic organisms. We found 13 studies testing the effect of iron addition as a restoration measure in the field (10) or using sediment from lakes and reservoirs in the laboratory (3). Twelve of the studies reported increased P retention after iron addition, which depended on the iron salts used and the concentrations added in two studies, whereas one study found no effect on P retention. Eight out of the nine field studies that reported biotic responses found reduced chlorophyll concentrations in the water column, whereas toxic effects of iron on organisms remained absent. Iron addition was most successful when external P loading, and concentrations of organic matter and sulphate were low as well as densities of sediment disturbing fish and crayfish. We conclude that iron addition can be a successful restoration method when these conditions are met.

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Section: Primary Producersmentioning

confidence: 98%

Lake restoration by in-lake iron addition: a synopsis of iron impact on aquatic organisms and shallow lake ecosystems

2015

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“…Aluminum and iron salts were able to inhibit the release of phosphorus (P) from sediment by combining with soluble reactive phosphorus (SRP) to form insoluble precipitants (Liu et al 2009). However, aluminum can be toxic to aquatic organisms (Pessot et al 2014), and the effect of iron salt is sensitive to redox and pH conditions (Burley et al 2001;Immers et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Effectiveness and Mode of Action of Calcium Nitrate and Phoslock® in Phosphorus Control in Contaminated Sediment, a Microcosm Study

Lin

Qiu²,

Yan³

et al. 2015

Water Air Soil Pollut

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Calcium nitrate and a lanthanum-modified bentonite (Phoslock®) were investigated for their ability to control the release of phosphorus from contaminated sediment. Their effectiveness and mode of action were assessed using microcosm experiments by monitoring the variation of physiochemical parameters and phosphorus and nitrogen species over time following the treatment for 66 days. Phoslock® was more effective reducing phosphorus in overlaying water and controlling its release from sediment. Calcium nitrate improved redox condition at the sediment-water interface and temporally reduce phosphorus in overlaying water but phosphorus level returned back in a long run. Phosphorus fractionation suggested that Phoslock® converted mobile phosphorus to more stable species while calcium nitrate increased the fractions of mobile phosphorus species.Phoslock® generally showed no effect on nitrogen species. Whereas calcium nitrate temporally increased nitrate, nitrite, and ammonium concentrations but their concentrations quickly reduced likely due to the denitrification process. Results suggested that Phoslock® can be more effective in controlling the release of phosphorus from sediment than calcium nitrate. However, calcium nitrate can improve the redox condition at the sediment-water interface, which may provide other benefits such as stimulating biodegradation.

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“…In the first stage of the experiment, limited penetration of radiation was caused by heavy water turbidity and iridescence. Once these optical conditions ceased and water clarity improved, flock coagulants settled on the charophyte and formed a colloid film limiting/reflecting light access (Immers et al 2013). In such a situation the charophyte grew to reach the water surface, which was a typical defense reaction to shading (Blindow and Schütte 2007).…”

Section: Discussionmentioning

confidence: 99%

Changes in Chara hispida L. morphology in response to phosphate aluminium coagulant application

Rybak

Joniak

2018

Limnological Review

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Progressing eutrophication of waterbodies requires measures to be undertaken that aim at halting or reversing negative changes in the environment. Chemical restoration is one of the most common methods used for lake treatment, where iron or aluminium phosphate coagulants are applied. However, their chemical qualities pose the risk of acidification and aluminium ion release, which become toxic in acidic conditions. The influence of coagulants on aquatic plants, including charophytes that are very valuable from the ecological perspective, is little recognised. For this reason, the aim of the research was to define changes in the growth pattern of the charophyte Chara hispida under the influence of an aluminium coagulant. The research was carried out in mesocosms (0.8 m3) located in situ in a lake. Polyaluminium chloride was applied once to each chamber in doses of 50.0, 100.0 and 200.0 ml m−3. Coagulant concentrations reflected aggressive restoration aimed at precipitation of phosphates, suspension and water colour at the same time. It was proved that the coagulant had inhibited the growth and slightly reduced the length of branchlets, and simultaneously elongated internode cells. Changes in the total length as well as the length of branchlets were caused by a strong pH decrease of the environment which simultaneously induced higher aluminium solubility and toxicity. Elongation of internode cells was caused by reduced light availability, resulting from high water turbidity in the first stage of coagulant’s application, and then from the charophytes’ thallus being covered by a coagulated suspension precipitated from water.

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Iron addition as a shallow lake restoration measure: impacts on charophyte growth

Cited by 27 publications

References 39 publications

Lake restoration by in-lake iron addition: a synopsis of iron impact on aquatic organisms and shallow lake ecosystems

Lake restoration by in-lake iron addition: a synopsis of iron impact on aquatic organisms and shallow lake ecosystems

Effectiveness and Mode of Action of Calcium Nitrate and Phoslock® in Phosphorus Control in Contaminated Sediment, a Microcosm Study

Changes in Chara hispida L. morphology in response to phosphate aluminium coagulant application

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