The impact of desiccation of a freshwater marsh (Garcines Nord, Camargue, France) on sediment-water-vegetation interactions

Groot, Cornelis-Jan de; Fabre, André

doi:10.1007/bf00000132

Cited by 50 publications

(22 citation statements)

References 13 publications

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“…With drawdown, the reservoir sediment is exposed and complex biogeochemical reactions begin. When previously reduced sediments are oxidized, metals can be mobilized (Saeki et al 1993;de Carvalho et al 1998) with certain species (most notably Fe), binding with and immobilizing phosphate (Degroot and Vanwijck 1993;Kleeberg and Heidenreich 2004). Nitrogen in the sediment may be mineralized, nitrified (Sparling and Ross 1988), and leached (Perrin et al 2000), denitrified (Kern et al 1996), or assimilated into riparian vegetation (James et al 2001).…”

Section: Acknowledgmentsmentioning

confidence: 99%

Sediment and nutrient dynamics following a low-head dam removal at Murphy Creek, California

Ahearn

Dahlgren

2005

Limnol. Oceanogr.

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We studied the impact of the removal of a 3-m dam on sediment and nutrient export. In the year after dam removal, sediment and nitrogen (N) export increased by an order of magnitude over the previous 2-yr mean. Longitudinal surface water samples were collected, sediments were cored, and the channel was surveyed during different seasons to determine the mechanisms driving sediment and nutrient dynamics in the recovering system. The majority of sediment transport occurred in pools and in the lowest 50 m of the 620-m restored reach. Phosphate export occurred primarily during large storms, with the restored reach acting as a phosphate sink during most flow conditions. The majority of surface water N originated from areas within the sediment wedge that had high extractable N concentrations (average NH 4 -N ϭ 50 g g Ϫ1 and NO 3 -N ϭ 38 g g Ϫ1 ) and dried out on a seasonal basis. Near the former dam site, year-round water saturation apparently inhibited nitrification and export of N as nitrate. This wetland area was the only portion of the restored reach that was an ammonium sink. After dam removal, N leaching from sediments occurred in autumn 2003 and again during the subsequent autumn, suggesting that N leaching from reservoir sediments is largely a seasonal process that may affect downstream aquatic ecosystems for a number of years.

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Section: Acknowledgmentsmentioning

confidence: 99%

Sediment and nutrient dynamics following a low-head dam removal at Murphy Creek, California

Ahearn

Dahlgren

2005

Limnol. Oceanogr.

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“…Drying and desiccation have been found to increase or decrease P bound to ferric J. Limnol., 2014;73(2): 274-281 ORIGINAL ARTICLE DOI: 10.4081/jlimnol.2014.871 Effects of pretreatment on the sequential phosphorus fractionation of anaerobic sediment Lei (Fabre, 1992;De Groot and Fabre, 1993;Kerr et al, 2010). In addition, drying decreases or has no influence on calcium bound P (De Groot and Fabre, 1993;Kerr et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…Goedkoop and Pettersson (2000) demonstrated that freeze-drying resulted in higher estimates for loosely adsorbed P, whereas P extracted by NaOH solution was decreased. Drying accelerates the mineralization of acid soluble organic P and decreases organic P in sediment (De Groot and Fabre, 1993;Kerr et al, 2010). The present study was designed specifically to test the hypothesis that pretreatment would influence P fractionation of anaerobic sediment.…”

Section: Introductionmentioning

confidence: 99%

Effects of pretreatment on the sequential phosphorus fractionation of anaerobic sediment

et al. 2014

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Phosphorus (P) fractionation is critical to understand P cycling in sediment and across the sediment-water interface. To examine the effect of pretreatment on the P fractionation of anaerobic sediment, anaerobic sediment samples were treated by oven-drying, airdrying, and freeze-drying, and a fresh sediment sample was used as a control treatment. A five-step sequential extraction procedure was applied, and six P fractions were examined. The results indicated that P NaCl (P extracted by NaCl), P BD (P extracted by Na 2 S 2 O 4 and NaHCO 3 ), P NaOH (P extracted by NaOH), and organic P were significantly influenced by pretreatment, whereas P HCl (P extracted by HCl) and residual P were not significantly affected by pretreatment. Compared to fresh sediment, drying treatments decreased P NaCl , P NaOH , and organic P but increased P BD . Among the three drying methods, oven-drying resulted in the greatest change in P fractionation; the effects of air-drying and freeze-drying were similar to each other. The total extracted P were similar among the four pretreatment methods. For the measurement of accurate P fractions, fresh sediment is the best option.

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“…L'induction des conditions aérobies entraîne une oxydation de FeS en Fe(OOH) capable de fixer du phosphore. Il a été démontré que les bactéries jouent un rôle primordial dans la fixation du phosphore sur Fe(OOH) en contrôlant l'état d'oxydation du fer (GACHTER et al, 1988 ;DE GROOT & FABRE, 1993).…”

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Échanges du phosphore à l'interface eau-sédiment dans un bassin de maturation (lagunage de Boujaad) et un étang d'alevinage (station de pisciculture Deroua, Béni-Mellal), Maroc

Kdadri¹,

Hasnaoui²,

Brahim³

2005

rseau

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Résumé de l'article Les sédiments utilisés dans cette étude sont prélevés dans deux milieux différents (bassin de maturation du lagunage de Boujaad et étang d'alevinage de la station Deroua, Béni-Mellal) dans le but de comprendre les conditions du milieu qui provoquent les échanges du phosphore à l'interface eau-sédiment et de comparer les échanges du phosphore à ce niveau.Cette étude a montré une différence dans la composition chimique des deux sédiments. En effet, au niveau de l'étang d'alevinage, le phosphore inorganique représente une part majoritaire (92,5%) surtout liée au calcium. En revanche, le phosphore total est réparti en phosphore organique (49,2%) et inorganique (49,8%) au niveau du bassin de maturation.Dans le bassin de maturation, le relargage du phosphore est plus important et il est sous forme inorganique lié essentiellement aux hydroxydes de fer. La fixation du phosphore par les sédiments est importante particulièrement en conditions aérobies, aussi bien dans le bassin de maturation que dans l'étang d'alevinage. This study showed a différence in the chemical composition of the two sédi-ments. In the fry pond, the majority of the phosphate was présent as inorganic phosphate (92.5%), especially in forms bound to calcium. On the other hand, total phosphate was divided equally into organic (49.2%) and inorganic (49.8%) phosphorus in the maturation pond. In this pond, phosphate solubility increased in the interstitial water under anoxie conditions. The phosphate released came principally from the inorganic fraction, particularly from Fe(OOH)-P. The maturation pond sédiments, which had accumulated much organic matter, liberated more orthophosphate than did the fry pond sédiments. Under air flushing, phosphate adsorption is significant particularly in the maturation and fry pond sédiments.

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The impact of desiccation of a freshwater marsh (Garcines Nord, Camargue, France) on sediment-water-vegetation interactions

Cited by 50 publications

References 13 publications

Sediment and nutrient dynamics following a low-head dam removal at Murphy Creek, California

Sediment and nutrient dynamics following a low-head dam removal at Murphy Creek, California

Effects of pretreatment on the sequential phosphorus fractionation of anaerobic sediment

Échanges du phosphore à l'interface eau-sédiment dans un bassin de maturation (lagunage de Boujaad) et un étang d'alevinage (station de pisciculture Deroua, Béni-Mellal), Maroc

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