Use of Artificial Stream Mesocosms to Investigate Mercury Uptake in the South River, Virginia, USA

Rainbow trout (Salmo gairdneri) were held in cages in the South Saskatchewan River to assess mercury uptake following curtailment of mercury discharges to the river. There was a rapid uptake of mercury by the fish during the first warm summer period (1970) with much less uptake during the rest of the year. A second summer experiment (1971) produced no significantly different results suggesting that a long-term contamination exists within this river system. Analyses showed that the bulk of mercury present in the fish carcasses was present as methylmercury.

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Episodic loadings of phosphorus influence growth and composition of benthic algae communities in artificial stream mesocosms

Water Research ◽

10.1016/j.watres.2020.116139 ◽

2020 ◽

Vol 185 ◽

pp. 116139

Author(s):

Nolan J.T. Pearce ◽

Kathryn E. Thomas ◽

Isabelle Lavoie ◽

Patricia A. Chambers ◽

Adam G. Yates

Keyword(s):

Benthic Algae ◽

Artificial Stream ◽

Stream Mesocosms

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Presidential Republicanism in the South, 1960

The Journal of Politics ◽

10.1017/s002238160001656x ◽

1962 ◽

Vol 24 (2) ◽

pp. 303-322 ◽

Cited By ~ 3

Author(s):

Bernard Cosman

Keyword(s):

The South

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Long-term Cyclic Variations of Prominences, Green and Red Coronae over Solar Cycles

International Astronomical Union Colloquium ◽

10.1017/s0252921100064496 ◽

2000 ◽

Vol 179 ◽

pp. 201-204

Author(s):

Vojtech Rušin ◽

Milan Minarovjech ◽

Milan Rybanský

Keyword(s):

Emission Lines ◽

High Latitudes ◽

Green Line ◽

Solar Cycles ◽

The South ◽

Coronal Emission ◽

Local Maxima ◽

The North ◽

Cyclic Variations

AbstractLong-term cyclic variations in the distribution of prominences and intensities of green (530.3 nm) and red (637.4 nm) coronal emission lines over solar cycles 18–23 are presented. Polar prominence branches will reach the poles at different epochs in cycle 23: the north branch at the beginning in 2002 and the south branch a year later (2003), respectively. The local maxima of intensities in the green line show both poleward- and equatorward-migrating branches. The poleward branches will reach the poles around cycle maxima like prominences, while the equatorward branches show a duration of 18 years and will end in cycle minima (2007). The red corona shows mostly equatorward branches. The possibility that these branches begin to develop at high latitudes in the preceding cycles cannot be excluded.

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