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In 1984-1995 the desmid flora was analysed in the Lubiec peat-bog. Of
206 taxa recorded as many as 43.2% were accessory and accidental species, which testifies to
a high variability of this desmid community. The Thumark Q green algae factor was applied
for defining the peat-bog’s trophic status, which decidedly determines the species composition
and abundance of desmids.
Phytoplankton was investigated in two localities in the Warta
River located upstream and downstream of the Jeziorsko Dam Reservoir. Spring
and summer peaks of algal development, dominated by diatoms (Bacillariophyceae)
(66.7 to 81.0% of total phytoplankton abundance), were recorded. Green algae
(Chlorophyta) constituted 7.7 to 38.4% while blue-green algae (Cyanophyia) from
1.3 to 13.3% of total...
In samples a post-peat excavation pit of ther Zbyszek peat bog
(Central Poland) a mass presence and development of autospores Eremosphaera
viridis De Bary 1858 were observed. This species is rarely reported in Poland, due
to its identification difficulties.
In 1988-1990 phytoplankton was investigated in the Sulejów
Reservoir. Two developmental peaks were recorded: a spring and an autumn ones; each
of them was dominated by diatoms, which constituted 80.0 to 97.5% of total
phytoplankton abundance. In all months Siephanodiscus hantzschii Grun. was the
dominant species. The subdominants were phytoflagellates, whose intensive development
was observed...
In July 1982 desmids cells enclosed in mucilaginous sheaths were
recorded during drought in the Bagno Przerębiec transitional peatbog. They were the
specimens of Cosmarium contraetum Kirch., Cosmoastrum punctulatum (Breb.)
Pal.-Mordv. var. kjellmanii (Wille) Pal.-Mordv., Desmidium cylindricum Grev., Desmidium
swartzii (Ag.) Ag. ex Ralfs and Raphidiastrum avicola (Breb.) Pal.-Mordv.
Besides, in...
The article presents findings of the further studies
on algae from the Mesotaeniaceae family and the Desmidiales order.
It contains important information on the area of studies, which is
affected negatively by the Bełchatów Industrial Region; on methods
of work and taxanomic changes within the framework of investigated
algae groups.
The performed quantitative analysis of algae from the Mesotaeniaceae...
The work includes some remarks about 318 taxons of the algae from
Mesotaeniaceae family and the Desmidiales order indicated in samples collected in the
period 1979-1982 on the transition peat bog „Bagno Przerębiec”. The observations were
then compared with the data offered by the latest world literature on the subject.
In Przerębiec Peatbog, in Szczerców Valley (Piotrków
province) there were indentifled 202 taxa from Mesotaenlaceae familie
and Desmldlales order. Samplex taken in 1979 and 1980 were
compared. There were discovered 86 common taxa, 54 taxa met in
1979 and not found in 1980. There were not noticed any rare taxa
or those not found on Poland's territory.
Praca niniejsza dotyczy badań jakościowych i ilościowych prowadzonych
nad glonami z rodziny Desmidiaceae w latach 1978—1979 we wschodniej
części torfowiska Bagno Przerębiec, leżącego na terenie Kotliny Szczercowskiej.
Ogółem na badanym terenie stwierdzono występowanie 101 gatunków,
38 odmian i 11 form należących do 21 rodzajów (Arthrodesmus, Closterium,
Cosmarium, CyJindrocystis, Desmidium, Euastrum,...
W próbach pobranych z torfowiska w Magdalenowie (woj. piotrkowskie)
zidentyfikowano 248 taksonów okrzemek (tab. 3). Nowym gatunkiem dla flory
Polski jest Asterionella fibula (Bréb.) Hust. (rys. 2). Interesującym
i rzadkim gatunkiem jest Pinnularia polyonca (Bréb.) O. Müll. (rys. 3).