Total phosphorus reference condition for subalpine lakes: A comparison among traditional methods and a new process-based watershed approach

Salerno, Franco; Viviano, Gaetano; Carraro, Elisa; Manfredi, Emanuela Chiara; Lami, Andrea; Musazzi, Simona; Marchetto, Aldo; Guyennon, Nicolas; Tartari, Gianni; Copetti, Diego

doi:10.1016/j.jenvman.2014.06.011

Cited by 23 publications

(13 citation statements)

References 51 publications

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“…The unbalanced biogeochemical cycle of phosphorus in water is a critical reason for eutrophication (Conley et al 2009;Zaaboub et al 2014), while phosphorus migration is closely related to its biological/abiological reactions, i.e., absorption/transfer, sorption/desorption, precipitation/dissolution, oxidation/reduction, and convection/diffusion (Withers and Jarvie 2008;Salerno et al 2014;Baken et al 2015). In general, submerged macrophytes can remove many nutrients from fresh water (Srivastava et al 2008;Dierberg et al 2002) and CaCO 3 -P coprecipitation is reported to play an important role in dephosphorization by submerged macrophytes (Kufel et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Occurrence and characterization of CaCO3-P coprecipitation on the leaf surface of Potamogeton crispus in water

Liu

Guo

Yuan

et al. 2016

Environ Sci Pollut Res

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In this paper, the characterization of CaCO 3 -P coprecipitation on the leaf surface of Potamogeton crispus at various temperatures in pot experiments was investigated. White precipitates occurred on the leaf surfaces during the P. crispus growth period, and the chemical analysis demonstrates that the white precipitates contain Ca and P. The primary constituent of the white precipitates on the leaf of P. crispus was octacalcium phosphate (OCP) and hydroxyapatite. XRD characterization showed that the precipitates mostly consisted of crystals formed by calcium carbonate and hydroxyapatite, and the high calcium/phosphorus ratio indicated that the white coprecipitates were CaCO 3 -P. The scanning electron microscopy (SEM) and energy-dispersive X-ray spectrometry (EDX) results confirmed that the precipitates on the surface of P. crispus leaves were carbonate-containing hydroxylapatite. In addition, no significant differences was observed in the structure of CaCO 3 -P coprecipitation between room temperature and consistent temperature treatments, which means that a little change in the temperature cannot change the process of Ca-P coprecipitation. Finally, coprecipitation of CaCO 3 -P on the leaf surface of P. crispus was proposed based on the morphology and structure analysis of CaCO 3 -P coprecipitation.

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Section: Introductionmentioning

confidence: 99%

Occurrence and characterization of CaCO3-P coprecipitation on the leaf surface of Potamogeton crispus in water

Liu

Guo

Yuan

et al. 2016

Environ Sci Pollut Res

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“…Estimation of the external P load can be performed using various methods (Salerno et al 2014). The choice of a specific methodological approach depends on both the available information and the required level of accuracy.…”

Section: External P Load Estimationmentioning

confidence: 99%

“…The choice of a specific methodological approach depends on both the available information and the required level of accuracy. The most recent studies, however, suggest estimating the total P (TP) load as the sum of the different pollution sources (Salerno et al, 2014) to obtain more accurate estimates of the TP load and to better target the management practices because some pollutant sources can be more easily intercepted and managed than others (e.g., point vs. diffusive). In this study, we adopted this general approach to calculate the TP load.…”

Section: External P Load Estimationmentioning

confidence: 99%

“…The annual natural P load was calculated using the soil and water assessment tool (SWAT; Arnold et al 1993) a hydrological-transport model at the basin scale. As described in Salerno et al (2014), this model was trained (calibrated and validated) daily in 2010 for both discharges and P concentrations in an uncontaminated sub-basin located in the northeastern part of the Lake Pusiano basin. The comparison between daily observed and simulated discharges and P concentrations revealed a good performance (R 2 = 0.74) of the model in simulating the P loads (concentrations multiplied by discharges) theoretical water renewal time <1 year.…”

Section: External P Load Estimationmentioning

confidence: 99%

“…The remaining part is urbanized (12%), with ~30 000 inhabitants in the basin, mainly concentrated along the at the daily scale. After calibration/validation, the model set up was applied to all natural surfaces of the basin to calculate the natural P loads (Salerno et al 2014).…”

Section: External P Load Estimationmentioning

confidence: 99%

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Restoring lakes through external phosphorus load reduction: the case of Lake Pusiano (Southern Alps)

et al. 2017

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We estimated the external phosphorus load (EPL) between 1960 and 2015 in Lake Pusiano, a midsized subalpine lake that reached its maximum trophic state in the mid-1980s. Using historical data we also estimated the internal phosphorus load (IPL) between 1972 and 2015. EPL reached its maximum in the mid-1980s with phosphorus (P) values ~21 t yr −1 compared to the current value close to 6 t yr −1. IPL was one order of magnitude less and ranged between 0.25 t yr −1 (2015) and 3.6 (1985) t yr −1. The strong reduction of the P load determined a marked decrease of both P (from 200 to 23 μg L −1) and chlorophyll a (from 18 to 8 μg L −1) in-lake concentrations. The process of eutrophication and subsequent recovery, however, showed hysteresis between P load and in-lake P concentrations. In recent years, in particular, the P concentrations at winter overturn seem to be independent from the P load, related to modifications in the hydrological management of the lake that favored P flushout in October-November, when the EPL is maximal. This process led to a marked decrease of the total P concentrations at winter overturn (23 μg L −1), which recently resulted in lower-than-target concentrations (30 μg L −1) established by the Lombardy Region. The lake, nevertheless, suffers from the presence of the toxic cyanobacterium Planktothrix rubescens, and eradicating this species and further improving water quality will likely require an additional abatement of the EPL.

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Land Use, Phosphorus Pollution and Risk Assessment for the Bolsena Lake (Italy). An Estimation Using Remote Sensing and Multi Criteria Analysis

Piccinno

Caronte-Veisz

Recanatesi

2020

New Metropolitan Perspectives

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Total phosphorus reference condition for subalpine lakes: A comparison among traditional methods and a new process-based watershed approach

Cited by 23 publications

References 51 publications

Occurrence and characterization of CaCO3-P coprecipitation on the leaf surface of Potamogeton crispus in water

Occurrence and characterization of CaCO3-P coprecipitation on the leaf surface of Potamogeton crispus in water

Restoring lakes through external phosphorus load reduction: the case of Lake Pusiano (Southern Alps)

Land Use, Phosphorus Pollution and Risk Assessment for the Bolsena Lake (Italy). An Estimation Using Remote Sensing and Multi Criteria Analysis

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