Caractérisation de la charge interne de phosphore du lac Nairne, Charlevoix (Québec)

Labrecque, Valérie; Nürnberg, Gertrud K.; Tremblay, R R; Pienitz, Reinhard

doi:10.7202/1008537ar

Cited by 3 publications

(9 citation statements)

References 29 publications

(30 reference statements)

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“…Similar observations have been made by Pourriot and Meybeck (1995) stating that such rate is inferior to 1% in sediments. It is lower than 0.005% in lake Naine (Labrecque, 2012).…”

Section: Phosphorus Release Ratementioning

confidence: 71%

“…Phosphorus release rate (TL) recorded (11,05 mg*m -2 *j -1 ) is over the value indicated by Labrecque et al, (2012) in lake Naime (4 mg*m -2 *j -1 ). Nürnberg and Lazerte (2004) cited by Labrecque et al, (2012) tons.…”

Section: Phosphorus Release Ratementioning

confidence: 72%

“…High phosphorus release may favorite enrichment of the water column in phosphorus, algal biomass augmentation and consequently a reduction of transparency (Labrecque et al, 2012). In the watershed studied, GSS registered lower mean values in chlorophyll a and transparency, contrasting with sediment phosphorus content and its release rate in that period particularly concerning chlorophyll a, while rH is reducer.…”

Section: Phosphorus Release Ratementioning

confidence: 79%

“…They can be stored perennially whenever combined with other ions present within soil particles (iron, aluminium). Thus, human slope basin exploitation provokes an accumulation of phosphorus in sediments (Labrecque et al, 2012). Actual phosphorus in sediments hinges also upon biological activity running in the lake (Stenzel et al, 2017).…”

Section: Issn: 2319-7706 Volume 6 Number 11 (2017) Pp 2914-2937mentioning

confidence: 99%

“…Nürnberg and Lazerte (2004) cited by Labrecque et al, (2012) tons. An elevated phosphorus load is revealed in this lagoon (resulting probably from many years and seasons sedimentation process) and should be even higher omitting lagoon sand exploitation activities starting by scraping down the first centimeters of the lagoon bottom.…”

Section: Phosphorus Release Ratementioning

confidence: 99%

See 4 more Smart Citations

Fractionation of Sediment Phosphorus in Lagoon Porto-Novo (Benin Republic) Revisited: Changes in Phosphorus Fractions and Release as Affected by Seasons and Sampling Sites

Akogbeto¹,

Zanklan²,

Sossoukpe³

et al. 2017

Int.J.Curr.Microbiol.App.Sci

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“…Similar observations have been made by Pourriot and Meybeck (1995) stating that such rate is inferior to 1% in sediments. It is lower than 0.005% in lake Naine (Labrecque, 2012).…”

Section: Phosphorus Release Ratementioning

confidence: 71%

Section: Phosphorus Release Ratementioning

confidence: 72%

Section: Phosphorus Release Ratementioning

confidence: 79%

Section: Issn: 2319-7706 Volume 6 Number 11 (2017) Pp 2914-2937mentioning

confidence: 99%

Section: Phosphorus Release Ratementioning

confidence: 99%

See 3 more Smart Citations

Fractionation of Sediment Phosphorus in Lagoon Porto-Novo (Benin Republic) Revisited: Changes in Phosphorus Fractions and Release as Affected by Seasons and Sampling Sites

Akogbeto¹,

Zanklan²,

Sossoukpe³

et al. 2017

Int.J.Curr.Microbiol.App.Sci

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Reconstructing phosphorus levels using models based on the modern diatom assemblages of 55 lakes in southern Quebec

Tremblay

Pienitz

Legendre

2014

Can. J. Fish. Aquat. Sci.

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This study shows how modern diatom assemblages, obtained from the surface sediments of 55 deep and shallow lakes in southern Quebec and representing a gradient in trophic state and specific conductivity, can be used to reconstruct the historical water column concentrations of total phosphorus (TP) over time. Inference models were developed with the aid of regression analyses based on weighted means. The TP models demonstrate statistical performances equal to or superior to TP models developed in the past for other regions in Canada and elsewhere in the world. A reconstruction of TP values, based on fossil diatom assemblages of Lac Nairne (Charlevoix, QC), was conducted. Comparing the TP inferred values with the measured values and those estimated using export coefficients, the reliability of the model was proven. In addition, the comparison of the results obtained from reconstructions performed with two inference models (Quebec and Ontario lakes) also revealed that models predicted TP and not a collinear variable.Résumé : Cet article vise à montrer que les assemblages de diatomées modernes répertoriées dans les sédiments de surface de 55 lacs du Québec méridional, représentatifs d'un gradient d'états trophiques, permettent de reconstituer les teneurs historiques en phosphore total (PT) qui prévalaient dans la colonne d'eau des lacs du Québec. Pour ce faire, un modèle d'inférence a été développé à l'aide d'analyses de régressions basées sur les moyennes pondérées. Les performances statistiques du modèle de PT sont équivalentes ou supérieures aux modèles développés pour des régions différentes au Canada ou ailleurs dans le monde. Une reconstitution des valeurs de PT, basée sur les assemblages de diatomées fossiles du lac Nairne (Charlevoix, QC) a été menée. La comparaison des valeurs de PT inférées avec les valeurs mesurées ainsi que celles estimées à l'aide des coefficients d'exportation a montré la justesse du modèle. De plus, la comparaison des résultats provenant de reconstitutions menées avec deux modèles d'inférence (lacs du Québec et de l'Ontario) a également montré que les modèles prédisent le PT et non une variable colinéaire.

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Internal phosphorus load estimation during biomanipulation in a large polymictic and mesotrophic lake

Nürnberg¹,

Tarvainen

Ventelä

et al. 2012

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We quantified internal phosphorus (P) load for 26 years in the polymictic, large (155 km 2 ) and shallow (mean depth 5.5 m) Lake Säkylän Pyhäjärvi, which was heavily biomanipulated by fish removal. Internal load was estimated as (1) partially net estimates from in situ P summer increases, (2) net estimates from P budgets (mass balance approach), and (3) gross estimates from predicted active sediment release area and sediment P release, dependent on August lake temperature. Long-term averages of these estimates were similar and large at about 60% of average external load (105 mg m -2 yr -1 ) and were larger than external load in years with high water temperature and low water load. Regression analysis revealed that external load is decreasing but internal load is increasing over time. Internal load was negatively correlated with annual water load and positively correlated with lake water temperature. Long-term average annual or summer P concentrations are adequately predicted by a P mass balance model that includes external load, internal load (Method 3), and sedimentation as independently predicted retention. Predictability was poor for individual years, however, partially due to the poor correlation of observed lake and outflow P concentrations, the variable abundance of planktivorous fish, and reflecting the violation of the steady state assumption when individual years are modeled. Scenario modeling shows that biomanipulation cancels out the effects of internal load and forecasts a rapid increase of internal load and P concentration due to climate change; therefore, measures that further decrease external and internal P load and strengthen biomanipulation are recommended.

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Caractérisation de la charge interne de phosphore du lac Nairne, Charlevoix (Québec)

Cited by 3 publications

References 29 publications

Fractionation of Sediment Phosphorus in Lagoon Porto-Novo (Benin Republic) Revisited: Changes in Phosphorus Fractions and Release as Affected by Seasons and Sampling Sites

Fractionation of Sediment Phosphorus in Lagoon Porto-Novo (Benin Republic) Revisited: Changes in Phosphorus Fractions and Release as Affected by Seasons and Sampling Sites

Reconstructing phosphorus levels using models based on the modern diatom assemblages of 55 lakes in southern Quebec

Internal phosphorus load estimation during biomanipulation in a large polymictic and mesotrophic lake

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