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Assessment of a sheltered euhaline area of the Southeastern Bay of Biscay to sustain bivalve production in terms of phytoplankton community composition

100%

Bilbao J., Muniz O., Rodriguez J. G., Revilla M., Laza-Matinez A., Seoane S.

Oceanologia

2021

tom 63

nr 1

Phytoplankton response to changes of physicochemical variables in Lake Nasser, Egypt

84%

Hussian A.-E. M., Napiorkowska-Krzebietke A., Toufeek M. E. F., El-Monem A. M. A., Morsi H. H.

Journal of Elementology

2015

tom 20

nr 4

Seasonal and spatial changes of phytoplankton in relation to environmental variables affecting the water quality were investigated along the main channel of Lake Nasser throughout 2013. In total, 104 phytoplankton species, belonging to 7 classes, were identified. Phytoplankton assemblages were dominated by Bacillariophyceae, Cyanophyceae and Chlorophyceae, whereas Dinophyceae, Euglenophyceae, Chrysophyceae and Cryptophyceae were infrequent. Cyclotella glomerata, C. ocellata and Aulacoseira granulata represented the most abundant species among Bacillariophyceae. Cyanophyceae was dominated by Planktolyngbya limnetica and Eucapsis minuta, and Chlorophyceae by Ankistrodesmus fusiformis and Staurastrum paradoxum. The water column was thermally stratified during summer, while being mixed throughout winter. Phytoplankton features and physicochemical variables were analyzed with the principal component analysis. Electrical conductivity and water temperature were the most common factors negatively controlling phytoplankton density. Phytoplankton density was positively associated with NO3, whereas it was negatively correlated with PO4 and HCO3. Cyanophyceae were strongly adapted to the environmental variables and NO2 was limiting their growth. Chlorophyceae were more dependent on PO4 than NO3. The vertical distribution of Chl a was associated with the summer thermal stratification and its concentration increased southwards. Chl a was affected by NO2 and linked to Chlorophyceae. The regional variations of phytoplankton reflected its response to varying environmental conditions. The annual average of the trophic state index indicated eutrophic waters of Lake Nasser.

Analysis of interspecies physicochemical variation of grain legume seeds

84%

Rybinski W., Rusinek R., Szot B., Bocianowski J., Starzycki M.

International Agrophysics

2014

tom 28

nr 4

The paper presents an attempt to assess the reaction of seeds to mechanical loads taking into account their geometry expressed as seed thickness and 1000 seed weight. The initial material comprised 33 genotypes of grain legume plants and included cultivars registered in the country and breeding lines that are subject to pre-registration trials. The analysis of variance revealed significant diversity of the cultivars and lines of the species studied in terms of each of the analysed trait. The highest weight of 1000 seeds were obtained for white lupine seeds and peas, the lowest for andean lupine seeds. The maximum deformation and energy were obtained for white lupine seeds, the lowest for pea seeds, the maximum force and module the lowest values were determined for narrow-leafed lupine and pea. The highest values of protein were obtained for andean and yellow lupine, a fat content for andean and white lupine. The fatty acid profile as much as 70% or more were linoleic and oleic acids. Against the background of all the species are distinguished by white lupine seeds with a high content of oleic acid and the lowest of linoleic acid, for yellow lupine were obtained the inverse ratio of the two acids.

Ograniczanie wyników

1 International Agrophysics

1 Journal of Elementology

1 Oceanologia

1 Bilbao J.

1 Bocianowski J.

1 El-Monem A. M. A.

1 Hussian A.-E. M.

1 Laza-Matinez A.

1 Morsi H. H.

1 Muniz O.

1 Napiorkowska-Krzebietke A.

1 Revilla M.

1 Rodriguez J. G.

1 Rusinek R.

1 Rybinski W.

1 Seoane S.

1 Starzycki M.

1 Szot B.

1 Toufeek M. E. F.

1 2021

1 2015

1 2014

Wyniki wyszukiwania

Assessment of a sheltered euhaline area of the Southeastern Bay of Biscay to sustain bivalve production in terms of phytoplankton community composition

Phytoplankton response to changes of physicochemical variables in Lake Nasser, Egypt

Analysis of interspecies physicochemical variation of grain legume seeds