Eutrophication of some northwestern Iowa lakes

Jones, John R.

doi:10.31274/rtd-180815-2047

Cited by 4 publications

(5 citation statements)

References 9 publications

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“…Shaw et al (1989) report lower annual TN deposition than our values (Table VI), but this may be attributed to differences in study locations (boreal forest versus agricultural landscape). Past wet deposition data for our region showed NH 3 + NO 3 -N deposition of 8.3 kg ha −1 year −1 (Jones, 1974). Thus, it appears that landscape characteristics lead to variability in the deposition of N but that N deposition in this region is not extreme with respect to other reported values.…”

Section: Annual Depositioncontrasting

confidence: 54%

“…Lake Simcoe in Ontario (Winter et al, 2002) is surrounded by one of Canada's most agricultural and urbanized regions which could contribute greatly to higher atmospheric P deposition rates (Table VI). Past data in Iowa showed wet deposition of 0.32 kg ha −1 year −1 for P (Jones, 1974). Other studies for which only annual wet deposition was calculated yielded estimates of annual deposition of P of 0.09-0.15 kg ha −1 year −1 for north central Minnesota (Munger, 1982), and annual deposition of TP of 0.17 kg ha −1 year −1 for Lake Michigan (Murphy and Doskey, 1976).…”

Section: Annual Depositionmentioning

confidence: 97%

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Dry and wet atmospheric deposition of nitrogen, phosphorus and silicon in an agricultural region

Anderson

Downing

2006

Water Air Soil Pollut

140

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We measured atmospheric nutrient deposition as wet deposition and dry deposition to dry and wet surfaces. Our analyses offer estimates of atmospheric transport of nitrogen (N), phosphorus (P) and silicon (Si) in an agricultural region. Annual dry and wet deposition (ha −1 year −1 ) was 0.3 kg of P, 7.7 kg of N, and 6.1 kg of Si; lower than or similar to values seen in other landscapes. N:P and Si:N imply that atmospheric deposition enhances P and Si limitation. Most P and soluble reactive P (SRP) deposition occurred as dryfall and most dry-deposited P was SRP so would be more readily assimilable by plant life than rainfall P. Dry deposition of N to wet surfaces was several times greater than to dry surfaces, suggesting that ammonia (NH x ) gas absorbtion by water associated with wet surfaces is an important N transport mechanism. Deposition of all nutrients peaked when agricultural planting and fertilization were active; ratios of NH x :nitrate (NO x ) reflected the predominant use of NH x fertilizer. Wet deposition estimates were consistent over hundreds of km, but dry deposition estimates were influenced by animal confinements and construction. Precipitation wash-out of atmospheric nutrients was substantial but larger rain events yielded higher rates of wet deposition. Methodological results showed that local dust contaminated wet deposition more than dry; insects, bird droppings and leaves may have biased past deposition estimates; and estimating dry deposition to dry plastic buckets may underestimate annual deposition of N, especially NH x .

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Section: Annual Depositioncontrasting

confidence: 54%

Section: Annual Depositionmentioning

confidence: 97%

Dry and wet atmospheric deposition of nitrogen, phosphorus and silicon in an agricultural region

Anderson

Downing

2006

Water Air Soil Pollut

140

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“…Drainage areas for West Okoboji, East Okoboji, and Spirit Lakes are assumed to be independent (Jones 1974 Dudley (1976) . Collecting tubes consisted of four PVC cylinders (5 .1 cm X 25 .4 cm) closed at one end with a rubber stopper .…”

Section: Methodsmentioning

confidence: 99%

Sedimentary losses of phosphorus in some natural and artificial Iowa lakes

Jones

Bachmann

1982

Hydrobiologia

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Phosphorus sedimentation in four natural and four artificial Iowa lakes was measured by using sediment traps to determine if sedimentary phosphorus losses were greater in artificial lakes than in natural lakes and the limnological factors influencing phosphorus loss rates . Mean phosphorus sedimentation rates ranged from 13 .3 to 218 mg . m -2 day -1 . Although phosphorus sedimentation rates for the natural lakes as a group did not differ significantly from the rates for artificial lakes, there were significant differences among individual lakes . Phosphorus sedimentation rates also varied significantly during different seasons at different locations within a lake and at different depths within a location . Despite the variance, phosphorus sedimentation rates were strongly correlated with inorganic sediment concentrations and inorganic matter sedimentation rates, thus suggesting that inorganic sediments influence phosphorus sedimentation rates . When Iowa data were combined with data from published studies, mean sedimentation rates were directly correlated with mean chlorophyll a concentrations of the lakes . These data strongly suggest that sedimentation rates as measured by sediment traps are strongly influenced by the trophic status of a lake . Though sedimentation rates were higher in the more productive lakes, it is suggested that these rates represent only gross sedimentation rates rather than net sedimentation rates because of resuspension and resedimentation of bottom sediments.

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“…I thank: Professor Emeritus and Director Emeritus John Magnuson, Laboratory of Limnology, University of Wisconsin‐Madison for sending me three helpful articles, and for commenting on aspects of this paper; Professor Michael J. Lannoo, Indiana University School of Medicine, for telling me about limnology since 1930 at the Iowa Lakeside Laboratory and sending me a copy of Jones and Bachmann (; cited above); Professor Stephen Bocking, Environmental and Resource Science Studies, Trent University, Peterborough, Ontario for comments on Canadian limnology; Professor Emeritus Eric L. Mills, Dalhousie University, for information on M. W. Smith and F. R. Hayes; Gene E. Likens, Director Emeritus, Cary Institute of Ecosystem Studies, for information on history of Hubbard Brook Ecosystem Studies and an article on field stations; and Patricia A. Werner for sending me (9 July 2015) her recollections of Robert Wetzel and the Kellogg Biological Station, Gull Lake, Michigan; Laura Mason for reproducing illustrations and assistance with copyright permissions; and Jerry Hershberger for computer assistance.…”

Section: Acknowledgmentsmentioning

confidence: 99%

Part 57: Aspects of Limnology in America, 1930s to about 1990, Led by Hutchinson and Hasler

Egerton

2016

Bulletin Ecologic Soc America

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Eutrophication of some northwestern Iowa lakes

Cited by 4 publications

References 9 publications

Dry and wet atmospheric deposition of nitrogen, phosphorus and silicon in an agricultural region

Dry and wet atmospheric deposition of nitrogen, phosphorus and silicon in an agricultural region

Sedimentary losses of phosphorus in some natural and artificial Iowa lakes

Part 57: Aspects of Limnology in America, 1930s to about 1990, Led by Hutchinson and Hasler

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