scholarly journals THE REDOX POTENTIALS IN SMALL OLIGO AND MEROMICTIC LAKES

1970 ◽  
Vol 1 (1) ◽  
pp. 56-65 ◽  
Author(s):  
JOHANNES KJENSMO
Keyword(s):  
Vertical Distribution ◽  
Redox Potential ◽  
Deep Water ◽  
Lake Water ◽  
Seasonal Variations ◽  
Redox Potentials ◽  
Ecological Significance ◽  
Meromictic Lakes ◽  
The Subject ◽  
The Vertical Distribution

The redox potentials of lake water have been the subject of several investigations (Kusnetzow 1935, Pearsall & Mortimer 1939, Hutchinson, Deevey & Wollack 1939, Deevey 1941, Allgeier, Hafford & Juday 1941, Mortimer 1941-42). The ecological significance of the redox potentials is stressed in several of these works. The work of Mortimer (1941-42) also shows the importance of the seasonal variations in redox potentials for the liberation from the sediments of different important nutrients. At present very little is known about the redox potential of the deep water in meromictic lakes. Allgeier, Hafford & Juday (1941) recorded vertical distribution of redox potential in one meromictic lake, Lake Mary, Wisconsin. The redox potential of the monimolimnion of Lake Mary varied from Eh = 0.140 volts at 8 m to Eh = 0.075 volts at 20.5 m. Hutchinson (1957) assumes it probable that other, but by no means all, meromictic lakes will be found to show a similar phenomenon. In the present paper the vertical distribution of redox potential of the water of three meromictic and one oligomictic lake is described.

Diel variation in the vertical distribution of deep-water scattering layers in the Gulf of Mexico

2016 ◽  
Vol 115 ◽  
pp. 91-102 ◽  
Author(s):  
Marta D'Elia ◽  
Joseph D. Warren ◽  
Ivan Rodriguez-Pinto ◽  
Tracey T. Sutton ◽  
April Cook ◽  
...  
Keyword(s):  
Gulf Of Mexico ◽  
Vertical Distribution ◽  
Deep Water ◽  
Diel Variation ◽  
The Vertical Distribution

scholarly journals Vertical distribution and aggregation patterns of krill (Crustacea: Euphausiacea) in the Bay of Biscay: interannual and seasonal variability

2019 ◽  
Vol 97 (7) ◽  
pp. 619-630 ◽  
Author(s):  
M. Peña ◽  
R. González-Quirós ◽  
I. Munuera-Fernández ◽  
F. González ◽  
S. Romero-Romero ◽  
...  
Keyword(s):  
Vertical Distribution ◽  
Vertical Migration ◽  
Seasonal Variations ◽  
Seasonal Variability ◽  
Shelf Area ◽  
Bay Of Biscay ◽  
Acoustic Data ◽  
Epipelagic Zone ◽  
Acoustic Recording ◽  
The Vertical Distribution

Studies of krill (Crustacea: Euphausiacea) in oceanic waters of the Bay of Biscay are scarce and restricted to the epipelagic zone, overlooking vertical dynamics such as diurnal vertical migration (DVM). There is a growing interest in acoustically evaluating the biomass of krill in this area, but this requires a good knowledge of its vertical dynamics and aggregation patterns. In this work we employed acoustic data and net samples from two consecutive annual surveys covering a wide off-shelf area of the Bay of Biscay (JUVENA surveys of 2013 and 2014) and four seasonal surveys covering slope and oceanic waters in the Cantabrian Sea (SCAPA surveys of 2015). Vertical dynamics of krill were analyzed in the frame of the environmental seascape. High interannual and seasonal variations in the vertical distribution and aggregation patterns (small swarms, dense aggregations, or loose layers) of krill were observed. The vertical distribution covaried with dissolved oxygen and salinity. According to our findings, the best season to acoustically evaluate krill in the Bay of Biscay is spring, with the bulk of the biomass located above 600 m depth. Moreover, extending the acoustic recording beyond the epipelagic zone is mandatory for any season.

scholarly journals II. Note on the vertical distribution of temperature in the ocean

1875 ◽  
Vol 23 (156-163) ◽  
pp. 123-127 ◽  
Keyword(s):  
Vertical Distribution ◽  
Sea Water ◽  
The Subject ◽  
The Vertical Distribution ◽  
Considerable Discussion

From newspapers and other reports which have been received by late mails, it appears that the distribution of temperature in the ocean is occupying the attention of a certain portion of the scientific public, and even giving rise to considerable discussion. The observations made on board this ship, and more especially in the Atlantic, have furnished the greater part of the material on which the various speculations have been founded. It appears to me that one point suggested by these observations has not received sufficient attention from those who have written and spoken on the subject: I mean, the effect of the changing seasons on sea-water.

on the vertical distribution of microorganisms in lake baikal during spring deep-water renewal

Microbiology ◽  
2000 ◽  
Vol 69 (3) ◽  
pp. 357-363 ◽  
Author(s):  
V. V. Parfenova ◽  
M. N. Shimaraev ◽  
T. Ya. Kostornova ◽  
V. M. Domysheva ◽  
L. A. Levin ◽  
...  
Keyword(s):  
Vertical Distribution ◽  
Lake Baikal ◽  
Deep Water ◽  
Water Renewal ◽  
The Vertical Distribution
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