The Exchange of Dissolved Substances Between Mud and Water in Lakes

Mortimer, C. H.

doi:10.2307/2256395

Cited by 1,491 publications

(620 citation statements)

References 32 publications

Supporting

Mentioning

586

Contrasting

Unclassified

Order By: Relevance

“…Retention of P in oxic sediments is often explained by a capping effect caused by a microzone of oxidized Fe oxide minerals on the sediment surface that sorbs settling P (as dissolved inorganic or organic phosphorus forms) and prevents P in deeper sediments from escaping (Mortimer 1941;Bö strom et al 1988;Penn et al 2000). In Missisquoi Bay, the top centimeter of sediment contains the most RFe (Table 1).…”

Section: Discussionmentioning

confidence: 99%

“…Sediment RP mobility is largely controlled by the sorption of phosphorus forms to iron and manganese oxides and hydroxides (hereafter termed ''Fe or Mn oxides'';Mortimer 1941;Lijklema 1980;Jensen et al 1992). The sorption capacity of these minerals is governed by their surface area, the local pH, and the redox conditions of the environment (Jensen and Andersen 1992;Jensen et al 1992).…”

mentioning

confidence: 99%

“…Under oxic conditions (redox potentials . 200 mV at pH 7), Fe oxides are insoluble and RP sorption is favorable (Mortimer 1941;Lijklema 1980;Søndergaard et al 1992). Anoxic conditions promote the reductive dissolution of insoluble Fe oxide minerals to soluble Fe(II), resulting in phosphorus release from the surfaces into the surrounding water (Bö strom et al 1988;Roden and Edmonds 1997;Christophoridis and Fytianos 2006).…”

mentioning

confidence: 99%

“…The presence of an Fe oxide microlayer at the SWI can be a sink for phosphorus (as an interface, the SWI is the plane where the water and sediment meet; but functionally this region is defined as 0-1 mm into the sediment below that plane; Mortimer 1941;Jensen et al 1992;Penn et al 2000). However, under anoxic conditions these Fe oxide minerals can be reductively dissolved by sediment microorganisms, releasing phosphorus from the sediments (Sundby et al 1992;Roden and Edmonds 1997;Anschutz et al 1998).…”

mentioning

confidence: 99%

See 3 more Smart Citations

Relating sediment phosphorus mobility to seasonal and diel redox fluctuations at the sediment–water interface in a eutrophic freshwater lake

Smith

Watzin

Druschel

2011

Limnology & Oceanography

122

View full text Add to dashboard Cite

Relationships between phosphorus cycling and redox conditions in the sediments of eutrophic Missisquoi Bay, Lake Champlain were investigated over diel and seasonal timescales in three consecutive summers (2007)(2008)(2009), one of which (2007) did not experience a cyanobacteria bloom for the first time in a decade. Sediment extraction data showed that reactive phosphorus (RP) is strongly correlated to reactive iron (RFe), suggesting that the mobility of a large portion (30-40%) of the total sediment phosphorus pool is associated with nanocrystalline iron oxide minerals that may be influenced by redox conditions. RP concentrations in the top sediments increased throughout 2007 but decreased throughout 2008; calculations indicate that , 1 mm of sediment could account for the increased total dissolved phosphorus observed in overlying water. Redox conditions were measured over 24 h in situ within sediment cores and at the sediment-water interface (SWI) at different stages of each season using voltammetry. SWI redox conditions became progressively more reduced across the season and overnight and were significantly more reducing in the presence of a bloom. Soluble RP and cyanobacteria cell counts measured at five depths through the water column strongly correlated with the most reducing conditions at the SWI. Observations suggest that redox controlled nutrient flux between the sediments and the water column is variable over diel and seasonal cycles. Cyanobacteria blooms most significantly affect SWI redox conditions, suggesting that blooms may enhance RP flux from sediments, setting up a positive feedback loop that can propagate and sustain blooms in shallow freshwater systems.

show abstract

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Relating sediment phosphorus mobility to seasonal and diel redox fluctuations at the sediment–water interface in a eutrophic freshwater lake

Smith

Watzin

Druschel

2011

Limnology & Oceanography

122

View full text Add to dashboard Cite

show abstract

“…Not all P that is deposited in the bottom sediments, however, remains there; some of it is released back into the water column, referred to as "internal P loading". Mortimer (1941) demonstrated that P release rates increase dramatically when dissolved oxygen near the sediment interface is completely depleted (anoxia). Various factors may affect the annual magnitude of this source, with internal P loading increasing as (i) the length of thermal stratification increases (Kling et al 2003); (ii) water temperatures increase promoting microbial decomposition (James and Barko 2004;Jensen et al 2006); and (iii) the amount of readily available P in the sediment increases (Rydin and Welch 1999).…”

Section: Introductionmentioning

confidence: 99%

Interannual and long-term changes in the trophic state of a multibasin lake: effects of morphology, climate, winter aeration, and beaver activity

Robertson

Rose

Reneau

2016

Can. J. Fish. Aquat. Sci.

View full text Add to dashboard Cite

Little St. Germain Lake (LSG), a relatively pristine multibasin lake in Wisconsin, USA, was examined to determine how morphologic (internal), climatic (external), anthropogenic (winter aeration), and natural (beaver activity) factors affect the trophic state (phosphorus, P; chlorophyll, CHL; and Secchi depth, SD) of each of its basins. Basins intercepting the main flow and external P sources had highest P and CHL and shallowest SD. Internal loading in shallow, polymictic basins caused P and CHL to increase and SD to decrease as summer progressed. Winter aeration used to eliminate winterkill increased summer internal P loading and decreased water quality, while reductions in upstream beaver impoundments had little effect on water quality. Variations in air temperature and precipitation affected each basin differently. Warmer air temperatures increased productivity throughout the lake and decreased clarity in less eutrophic basins. Increased precipitation increased P in the basins intercepting the main flow but had little effect on the isolated deep West Bay. These relations are used to project effects of future climatic changes on LSG and other temperate lakes.Résumé : Le lac Little St. Germain (LSG), un lac à plusieurs bassins relativement vierge du Wisconsin (États-Unis), a été examiné pour déterminer l'incidence de facteurs morphologiques (internes), climatiques (externes), humains (aération hivernale) et naturels (activités des castors) sur l'état trophique (phosphore, P; chlorophylle, CHL; profondeur de Secchi, SD) de chacun de ses bassins. Les bassins interceptant l'écoulement principal et les sources externes de P présentaient les P et CHL les plus élevés et la SD la plus faible. La charge interne dans les bassins polymictiques peu profonds entraînait l'augmentation du P et de la CHL et la diminution de la SD au fil de l'été. En ce qui concerne les mesures de gestion, l'aération hivernale visant à éliminer la martégade accroissait la charge interne estivale de P et réduisait la qualité de l'eau, alors que les réductions des digues de castors en amont n'avaient que peu d'effet sur cette dernière. L'incidence des variations de la température de l'air et des précipitations variait d'un bassin à l'autre. Des températures plus chaudes de l'air accroissaient la productivité à la grandeur du lac et réduisaient la clarté dans les bassins moins eutrophes. De plus importantes précipitations se traduisaient par une augmentation du P dans les bassins qui interceptent l'écoulement principal, mais n'avaient que peu d'effet sur le bassin profond et isolé de West Bay. Ces relations sont utilisées pour prédire les effets de changements climatiques futurs sur le LSG et d'autres lacs tempérés. [Traduit par la Rédaction]

show abstract

Vertical movements by planktonic cyanobacteria and the translocation of phosphorus: implications for lake restoration

Head

Jones

Bailey‐Watts³

1999

Aquatic Conserv: Mar. Freshw. Ecosyst.

View full text Add to dashboard Cite

1. Vertical movements of cyanobacteria during summer stratification were studied in Cauldshiels Loch, a small dimictic temperate lake. 2. Filaments of the three species of cyanobacteria dominant in the summer phytoplankton were recorded moving vertically in both directions, by simple traps deployed just below the thermocline. 3. These phytoplankters could potentially exploit opposing ends of the vertical light/nutrient gradient that existed in the water column during stratification. 4. The hypolimnion and water overlying the sediments were enriched by phosphorus released from the sediments. This internal loading to the lake provides a source of phosphorus available to migrating cyanobacteria to sustain production and growth in the epilimnion. 5. In this study, cyanobacteria filaments moving from the hypolimnion were found to be translocating phosphorus to the epilimnion. 6. Following reduction of external phosphorus loading, utilization of such internal phosphorus sources may delay expected reductions of bloom‐forming cyanobacterial communities, and consequent improvements in other aspects of water quality. Copyright © 1999 John Wiley & Sons, Ltd.

show abstract

The Exchange of Dissolved Substances Between Mud and Water in Lakes

Cited by 1,491 publications

References 32 publications

Relating sediment phosphorus mobility to seasonal and diel redox fluctuations at the sediment–water interface in a eutrophic freshwater lake

Relating sediment phosphorus mobility to seasonal and diel redox fluctuations at the sediment–water interface in a eutrophic freshwater lake

Interannual and long-term changes in the trophic state of a multibasin lake: effects of morphology, climate, winter aeration, and beaver activity

Vertical movements by planktonic cyanobacteria and the translocation of phosphorus: implications for lake restoration

Contact Info

Product

Resources

About