Abstract Aquatic plants are a rich source of health-beneficial substances. One such organisms is the submerged macrophyte Ceratophyllum demersum , which has not been sufficiently studied in this aspect so far. In work, we have environmental conditions prevailing subsidence mining reservoir Eastern Poland and shown that C. can be harvested for further analysis even from artificial anthropogenic reservoirs. The phytochemical ethanolic extract using LC–MS revealed high content phenolic...

Trachelomonas hispida var. coronata is one of the most widely reported varieties T . from water bodies worldwide. The specimens this variety, apart their species‐specific features, such as an ellipsoidal lorica covered with strong, sharp spines, have a crown consisting long spines surrounding apical pore opening. process formation poorly understood, and in few studies dealing topic, results indicate that these taxa entire species can produce completely devoid diacritic feature species. In...

During studies of phytoplankton in Sumin Lake (Łęczna-Włodawa Lakeland), conducted from May till September 2001 and 2002, 15 taxa the genus <em>Pediastrum </em>(Hydrodictyaceae, Sphaeropleales) were found. Among them there common species as boryanum</em>, <em>P. duplex</em>, tetras </em>and simplex</em>, but also rare integrum </em>or kawraiskyi</em>. An especially interesting was orientale</em>, taxon that until now has not been...

Background and aims – Phytoplankton samples were taken from a periodic, small very shallow former clay-pit pond in eastern Poland near Lublin city. Diversity of the euglenophyte community was assessed during period 2002–2004 2014. Methods Water collected with 20 µm plankton net slime aspirator (20 ml capacity) surface bottom. One aliquot each sample fixed for SEM observation; fresh part analysed using light microscope. Physical chemical properties water (pH, temperature, conductivity,...

Phytoplankton is one of the five biological quality elements used in assessment ecological status surface waters according to European Water Framework Directive established 2000. In this study, we determined three small and shallow lakes Polesie Plain, Eastern Poland, by using indices based on phytoplankton assemblages. The predominant all were filamentous cyanobacteria, both heterocystous non-heterocystous, represented genera Aphanizomenon, Planktothrix, Limnothrix, Planktolyngbya. We...

Cyanobacteria dominate lakes under diverse trophic conditions. Of these, two harmful filamentous cyanobacterial species, namely Planktothrix agardhii and P. rubescens, occupy completely different ecological niches in which they can form dense populations. In the present study, we investigated effects of environmental conditions on growth vertical distribution these species statuses. Moreover, underscored certain inconveniences assessment status according to European Union Water Framework...

Abstract The studies were carried out in six humic lakes (Polesie Region, Eastern Poland) order to present a role of phytoplankton relation physical and chemical parameters characteristic particular processes. On the basis properties waters (SD, colour, pH, EC, Ca2+, DIC, DOC), these are divided into three groups: dystrophic (Lakes Orchowe Płotycze), humoeutrophic Brudzieniec Pereszpa) mesoeutrophic Moszne Długie). occurrence dystrophication, humoeutrophication or eutrophication processes is...

Abstract The biogeography and taxonomy of euglenophytes from the southeastern United States were studied in material lakes, ponds rivers Alabama, Georgia, Kentucky, Mississippi, North Carolina Tennessee. 68 taxa found, 26 which are new for this region, belong to genera Euglena (26 taxa), Euglenaria (2), Lepocinclis (13), Phacus (25) Monomorphina (2). occurred at low density, sometimes as a single specimen. Euglenophyte diversity was highest ponds; had fewest taxa. Euglenophytes present most...

It is well-known that recent climatic changes have strongly affected aquatic ecosystems. In this study, we examined the complex factors determining development of phytoplankton communities during vegetative growth season in eutrophic lakes located a temperate zone eastern Poland. Our analysis enabled us to divide data into two different periods: years with cold winter and low total precipitation, those mild high precipitation. The showed soluble nitrogen content, concentration chlorophyll a,...

In the present study we focused on impact of macrophyte cover (composed mainly Lemna genus) phytoplankton taxonomic and functional diversity. Some important environmental parameters, light (KdPAR), chemical conditions (pH, dissolved oxygen, ammonium, soluble total forms phosphorus) were closely related to pleustophyte cover. Among them, key factor in ecology studied oxbow lakes was dense which strongly reduced illumination water. Neither differences mean nutrient concentrations between with...

Using data from nine lakes, sampled between 2002 and 2010, as well literature we have analysed blooms of Gonyostomum semen (Ehr.) Diesing in a new spreading area (Polesie region, Central–Eastern Poland). We tried to determine habitat suitability for high biomass the species, including both physicochemical morphometric features. High (>1.4 mg.L−1) was found three groups coloured water bodies: (a) very small (<0.002 km2) peat pits with low pH values mineral content; (b) larger ponds neutral...

This study documented lorica ultrastructure variation in Corresponding author: and related taxa from natural populations. On that basis, inaccuracies the taxonomic system of euglenoid Trachelomonas are pointed out. Loricae T. caudata very similar to it were examined by light scanning electron microscopy energy-dispersive X-ray spectroscopy (EDS). The latter observations showed similarity chemical composition between loricae different putative taxa, with silicon iron as main components,...

Abstract Cells of euglenoid Trachelomonas Ehrenb. vary in the size, shape and appearance external envelope’s ornamentation, as well internal structure. The loricae are generally similar color, ranging from light (hyaline, yellowish, golden, reddish, brownish) to dark (brown, black). This study examined twelve trachelomonad species, some (yellow golden) (brown). There were no black loricae, suggesting that little or Mn was taken up by cells. Though envelopes differed surface ornamentation...

This study concerns the two species Trachelomonas volzii and T. dubia which were examined for similarities dissimilarities of their loricae monads organization. We specifically focused on key features both that originally used to separate one from other: annular thickening at base collar dimensions ornamentation loricae. Loricae specimens by light scanning electron microscopy results compared with literature data describing these taxa reported occurrences in world. The together varieties...

Inhabiting of bromeliad tanks by algae and other organisms is a very interesting phenomenon. Although the conditions in these water are challenging, occurrence different cyanobacteria such specific ecological niches may suggest wide adaptive abilities among organisms. This work presents first report microhabitat bromeliads Thailand. In this study, diversity small bodies within phytotelmata from Queen Sirikit Botanical Garden was investigated. We presented both LM SEM documentation taxa...

During the 11-year period covered by this study (2003–2013), high precipitation events increased water level in deep hardwater of Lake Rogóźno (Eastern Poland), causing its to become browner. We investigated effect a change color on physical, chemical, and biological parameters lake. The concentration total phosphorus nitrogen decreased, whereas phytoplankton biomass, coupled with biomass flagellate species, increased, increase intensity. Such changes had an determination ecological status,...

I examined representatives of the genus Trachelomonas from two water bodies in eastern Poland. Using both light and scanning microscopy, a total 47 taxa were recorded during years study. Among taxa, 7 new to Poland (T. botanica var. minor, T. manginii, obovata klebsiana, zorensis, mirabilis obesa, raciborskii incerta woycickii f. pusilla). All found briefly described originally illustrated, added taxonomical comments almost all them. These may be helpful further research because at present,...

The presence of autotrophs, heterotrophs and mixotrophs among euglenoid taxa, multiple means nutrition, high tolerance to a wide range thermal living conditions contribute their colonization various types water bodies in different climatic zones. formation “blooms” by euglenoids occurs during accelerated development intensive cell division these organisms. Euglenoids outcompete other microalgae produce significant biomass under favorable conditions. ability temporal, reproductive protective...

One new &lt;em&gt;Heteronema&lt;/em&gt; cf. distigmoides Christen and three rare taxa of &lt;em&gt;H. acus&lt;/em&gt; (Ehrenberg) Stein, spirale&lt;/em&gt; KLEBS nebulosum&lt;/em&gt; (Dujardin) Klebs were reported for the Polish flora. All them found in mesotrophic Lake Piaseczno a small village pond Kaniwola, 2002. Both water reservoirs are situated on Łęczna-Włodawa Lakeland (Eastern Poland). The above mentioned species to flora Lakeland, probably because insufficient research, which was...

In Trachelomonas hispida, the adult envelope that surrounds monad is oval in shape and covered with spines. Development of lorica an interesting, but poorly known phenomenon. We observed detail formation spineless envelopes T. hispida using light microscopy scanning electron microscopy. The results showed young cells formed delicate net-like envelopes. structure changed age, mature specimens had solid, thick loricae small pores. As aged, they their shape, rope-like fibres from external layer...