Mud-water fluxes of inorganic nitrogen and manganese in the pelagic region of Lake Biwa: seasonal dynamics and impact on the hypolimnetic metabolism mssub:193-01-19

1994 ◽  
Vol 130 (3) ◽  
pp. 303-324
Author(s):  
Toshihiro Miyajima
Keyword(s):  
Seasonal Dynamics ◽  
Lake Biwa ◽  
Inorganic Nitrogen ◽  
Water Fluxes

scholarly journals ЗАКОНОМІРНОСТІ ФОРМУВАННЯ ФІТОПЛАНКТОНУ ЗА РІЗНИХ КОНЦЕНТРАЦІЙ БІОГЕННИХ ЕЛЕМЕНТІВ ТА ОРГАНІЧНОЇ РЕЧОВИНИ

2019 ◽  
Vol 75 (1) ◽  
pp. 43-51
Author(s):  
O. V. Kravtsova ◽  
V. I. Scherbak ◽  
M. I. Linchuk
Keyword(s):  
Organic Matter ◽  
Green Algae ◽  
Seasonal Dynamics ◽  
Inorganic Nitrogen ◽  
Biogenic Elements ◽  
Hydrochemical Regime ◽  
Dissolved Phosphorus ◽  
Growing Seasons ◽  
Total Inorganic Nitrogen ◽  
Plankton Communities

The seasonal dynamics of the concentration of nutrients in the form of inorganic nitrogen (NH4+, NO2, NO3-, ΣN), dissolved phosphorus, organic matter and the connection with the development of phytoplankton in waters with high content of total inorganic nitrogen (from 23.31 to 102.65 mg N/dm3) and its compounds (ammonia - from 8.42 to 76.60, nitrate - from 4.94 to 15.93, nitrite - from 0.077 to 4.35 mg N/dm3) and organic matter (from 8.00 to 21.92 mg O/dm3 by permanganate oxidation values and from 58.46 to 265.2 mg O/dm3 by dichromate oxidation values) were analyzed in paper. The peculiarity of the hydrochemical regime of the reservoirs was phenomenally high relations ΣN:P (133,54-12152,86) during the growing seasons. Found that response algal plankton communities such features hydrochemical regime is a simplification of the structure due to the predominance of representatives of departments Euglenophyta, Chlorophyta and Bacillariophyta, while Chrysophyta, Dinophyta, Charophyta and presented Cryptophyta 1-3 species. The response of phytoplankton to the high content of compounds of inorganic nitrogen is the increase in the number and biomass of green algae, and organic matter - eugenic algae.THE REGULARITIES OF PHYTOPLANKTON FORMATION AT VARIOS BIOGENIC ELEMENTS AND ORGANIC MATTER CONCENTRATIONS 

Seasonal dynamics of heterotrophic and plastidic protists in the water column of Lake Biwa, Japan

2017 ◽  
Vol 80 (2) ◽  
pp. 123-137 ◽  
Author(s):  
I Mukherjee ◽  
Y Hodoki ◽  
Si Nakano
Keyword(s):  
Water Column ◽  
Seasonal Dynamics ◽  
Lake Biwa

Sediment-water fluxes of inorganic nitrogen compounds along the transport route of organic matter in the North Sea

Ophelia ◽  
1995 ◽  
Vol 41 (1) ◽  
pp. 173-197 ◽  
Author(s):  
Lutz Lohse ◽  
Johannes F. P Malschaert ◽  
Caroline P. Slomp ◽  
Willem Helder ◽  
Wim van Raaphorst
Keyword(s):  
Organic Matter ◽  
North Sea ◽  
Inorganic Nitrogen ◽  
Nitrogen Compounds ◽  
Water Fluxes ◽  
The North ◽  
The North Sea

Modelling inorganic nitrogen in runoff: Seasonal dynamics at four European catchments as simulated by the MAGIC model

2015 ◽  
Vol 536 ◽  
pp. 1019-1028 ◽  
Author(s):  
F. Oulehle ◽  
B.J. Cosby ◽  
K. Austnes ◽  
C.D. Evans ◽  
J. Hruška ◽  
...  
Keyword(s):  
Seasonal Dynamics ◽  
Inorganic Nitrogen ◽  
Magic Model

Uptake regions of inorganic nitrogen in roots of carob seedlings

1995 ◽  
Vol 95 (2) ◽  
pp. 167-175 ◽  
Author(s):  
C. Cruz ◽  
S. H. Lips ◽  
M. A. Martins-Loucao
Keyword(s):  
Inorganic Nitrogen

Contribution of large bacteria to bacterial biomass in a deep freshwater lake (Lake Biwa, Japan)

2020 ◽  
Vol 85 ◽  
pp. 131-139
Author(s):  
S Shen ◽  
Y Shimizu
Keyword(s):  
Cell Volume ◽  
Bacterial Cell ◽  
Lake Biwa ◽  
Bacterial Biomass ◽  
Spatial Variations ◽  
Freshwater Lake ◽  
Heterotrophic Nanoflagellates ◽  
Bacterial Productivity ◽  
Transmission Electron ◽  
Seasonal And Spatial Variations

Despite the importance of bacterial cell volume in microbial ecology in aquatic environments, literature regarding the effects of seasonal and spatial variations on bacterial cell volume remains scarce. We used transmission electron microscopy to examine seasonal and spatial variations in bacterial cell size for 18 mo in 2 layers (epilimnion 0.5 m and hypolimnion 60 m) of Lake Biwa, Japan, a large and deep freshwater lake. During the stratified period, we found that the bacterial cell volume in the hypolimnion ranged from 0.017 to 0.12 µm3 (median), whereas that in the epilimnion was less variable (0.016 to 0.033 µm3, median) and much lower than that in the hypolimnion. Additionally, in the hypolimnion, cell volume during the stratified period was greater than that during the mixing period (up to 5.7-fold). These differences in cell volume resulted in comparable bacterial biomass in the hypolimnion and epilimnion, despite the fact that there was lower bacterial abundance in the hypolimnion than in the epilimnion. We also found that the biomass of larger bacteria, which are not likely to be grazed by heterotrophic nanoflagellates, increased in the hypolimnion during the stratified period. Our data suggest that estimation of carbon flux (e.g. bacterial productivity) needs to be interpreted cautiously when cell volume is used as a constant parametric value. In deep freshwater lakes, a difference in cell volume with seasonal and spatial variation may largely affect estimations.

Seasonal dynamics of climatic indices as one of the manifestation factors of pyrogenic phenomena on the territory of Lugansk region

2014 ◽  
Vol 25 (1-2) ◽  
pp. 101-107
Author(s):  
I. A. Tarakhkalo
Keyword(s):  
Seasonal Dynamics ◽  
Climatic Factors ◽  
Service Firms ◽  
Climatic Indices ◽  
Specific Influence

The analysis on the effects of pyrogenic Lugansk region for the period from 2001 to 2005 was conducted using the service «FIRMS». Established seasonal dynamics of pyrogenic phenomena and specific influence of climatic factors on the pyrogenic effects in the Luhansk region.

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