Variation of phytoplankton assemblages of Kongsfjorden in early autumn 2012: a microscopic and pigment ratio-based assessment

2016 ◽  
Vol 188 (4) ◽  
Author(s):  
Jane T. Bhaskar ◽  
S. C. Tripathy ◽  
P. Sabu ◽  
C. M. Laluraj ◽  
S. Rajan
Keyword(s):  
Phytoplankton Assemblages ◽  
Pigment Ratio ◽  
Early Autumn

Electron Microscopy in the Study of Natural Phytoplankton Assemblages

1985 ◽  
Vol 43 ◽  
pp. 620-623
Author(s):  
Linda Sicko-Goad
Keyword(s):  
Electron Microscopy ◽  
Aquatic Environment ◽  
Size Range ◽  
Physical Parameters ◽  
Specific Information ◽  
Phytoplankton Assemblages ◽  
Phytoplankton Productivity ◽  
Ecosystem Effects ◽  
Time Of Year ◽  
Species Specific

Although the use of electron microscopy and its varied methodologies is not usually associated with ecological studies, the types of species specific information that can be generated by these techniques are often quite useful in predicting long-term ecosystem effects. The utility of these techniques is especially apparent when one considers both the size range of particles found in the aquatic environment and the complexity of the phytoplankton assemblages.The size range and character of organisms found in the aquatic environment are dependent upon a variety of physical parameters that include sampling depth, location, and time of year. In the winter months, all the Laurentian Great Lakes are uniformly mixed and homothermous in the range of 1.1 to 1.7°C. During this time phytoplankton productivity is quite low.

HYDRODYNAMIC STRUCTURE IN A LARGE DAM RESERVOIR DURING EARLY AUTUMN

2018 ◽  
Vol 74 (5) ◽  
pp. I_481-I_486
Author(s):  
Makoto UMEDA ◽  
Yuta NAITO ◽  
Bunyu KOBORI ◽  
Tetsuya SHINTANI ◽  
Kazushi OMOE ◽  
...  
Keyword(s):  
Dam Reservoir ◽  
Early Autumn ◽  
Hydrodynamic Structure ◽  
Large Dam

scholarly journals Harp seal body condition and trophic interactions with prey in Norwegian high Arctic waters in early autumn

2020 ◽  
pp. 102498
Author(s):  
Tore Haug ◽  
Martin Biuw ◽  
Harald Gjøsæter ◽  
Tor Knutsen ◽  
Ulf Lindstrøm ◽  
...  
Keyword(s):  
Body Condition ◽  
Trophic Interactions ◽  
High Arctic ◽  
Harp Seal ◽  
Early Autumn

Inhibition of carbon fixation as a function of zinc uptake in natural phytoplankton assemblages

1979 ◽  
Vol 59 (4) ◽  
pp. 937-949 ◽  
Author(s):  
Anthony G. Davies ◽  
Jillian A. Sleep
Keyword(s):  
Carbon Fixation ◽  
Natural Populations ◽  
Plant Cells ◽  
Toxic Metal ◽  
Vitamin B ◽  
Phytoplankton Assemblages ◽  
Metal Contents ◽  
Rate Limiting ◽  
Natural Phytoplankton

There is now a substantial body of evidence that the growth rates of phytoplankton in culture are more closely related to the cellular levels of the rate-limiting constituent, be it a nutrient, micronutrient or toxic metal, than to the concentrations in the supporting medium; nitrate, Caperon (1968); phosphate, Fuhs (1969); silicate, Paasche (1973); vitamin B12, Droop (1968); iron, Davies (1970); mercury, Davies (1974); cadmium, Davies (1978a). This has suggested the requirement for a technique which would allow the determination of comparable relationships for natural populations of phytoplankton - how, for instance, their carbon fixation rates depend upon the metal contents of the plant cells. Although the effects of metals upon carbon fixation in phytoplankton assemblages from several different sea areas have already been examined (Knauer & Martin, 1972; Patin et al. 1974; Zingmark & Miller, 1975; Ibragim & Patin, 1976) no data seem to have been obtained on the levels of the metals present in the phytoplankton at the time of the measurements.

EARLY AUTUMN

1929 ◽  
Vol 10 (6) ◽  
pp. 76-79 ◽  
Author(s):  
Benjamin March
Keyword(s):  
Early Autumn
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