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EN
Potential factors affecting the occurrence of filamentous algae include the morphometry of water bodies, the type of substrate and physicochemical conditions of the habitat. This study attempts to describe the individual filamentous algae species recorded in Poland, taking into account the trophic and ecological characteristics based on our own research and available literature data. Filamentous algae attached to the substrate as well as those forming free-floating patches (loose or dense mats) and crusts occur in all types of water bodies. Among the representatives of filamentous algae species, Cladophora have the greatest time-spatial range for they grow abundantly in all types of water bodies. In other parts of Poland, Cladophora species are most common in rivers and shallow lakes. In the typical filamentous algae community, Cladophora, Spirogyra and Oedogonium occur with the highest frequency; Zygnema, Mougeotia, Microspora and Rhizoclonium are also present, but with smaller frequency. According to our studies, distribution of filamentous algae species is correlated with the eutrophic index (PO43-, N-NO3-, Chl a), chlorides of anthropogenic origin and TDS.
2
Content available remote Wytwarzanie ekstraktu z biomasy makroglonów do produkcji kosmetyków
PL
Przedstawiono warunki optymalizacji procesu wytwarzania ekstraktu z biomasy glonów na potrzeby przemysłu kosmetycznego. Proces optymalizacji omówiono w trzech obszarach: pozyskiwania biomasy ze środowiska naturalnego, ekstrakcji za pomocą ditlenku węgla w warunkach nadkrytycznych oraz wymogów formalnych, umożliwiających zastosowanie ekstraktu dla celów komercyjnych, w tym jako składnika preparatów kosmetycznych.
EN
A brief review, with 19 refs., of methods for processing algae biomass for cosmetic industry including biomass harvesting, extn. with supercrit. CO₂ and formal requirements.
3
Content available remote Composition and seasonal changes in filamentous algae in floating mats
EN
The occurrence of algal-cyanobacterial metaphyton mats in field (Konojad village) and artificial ponds (Poznań city) was investigated in the Wielkopolska region. The surface area of algal mats ranged between ca. 45% (natural pond) and 10% (artificial pond) of the total water surface, and the mats occurred from the water surface to the bottom; the algal diversity was similar in both types of ponds, i.e. about 10 taxa. The most frequently recorded and dominant taxa in small water bodies were: Spirogyra spp., Cladophora fracta in the artificial pond and Oedogonium spp., Cladophora rivularis in the natural pond. The dynamics of macroalgae demonstrated a pattern comprising different phases of taxa dominance. For example, April regarded as the first phase was characterized by a small amount of metaphyton, represented by Tribonema and Ulothrix taxa. In May, these species disappeared and were replaced by: Oedogonium spp. and Cladophora spp. which formed large aggregations in the field pond, and Spirogyra spp. which abundantly proliferated in the artificial pond. From June, however, Oedogonium and/or Cladophora significantly dominated in the mat structure and at the same time covered a large area of the water surface. The algal community was dominated by common algal taxa, among which single filaments of other taxa could also occur.
EN
Ulva flexuosa subsp. pilifera previously known from northern Poland, from the channel near Szczecin and ponds near Łódź, has recently been found in the Malta Reservoir in the Wielkopolska (West Poland) region. Specimens collected in the Wielkopolska region were examined in detail, also under a transmission electron microscope (TEM). The morphometric analysis of Ulva thalli (both young and mature specimens) was performed in order to study the differences in the ultrastructure of vegetative cells. Rectangular cells in young thalli measured from 32.21 - 55.81 μm to 20.24 – 35.12 μm, and they formed clear longitudinal rows, while cells in the mature specimens ranged from 25.09 – 47.66 μm to 18.90 – 31.56 μm. This study indicates that vegetative cells of the mature thalli show tendency towards distortions of both the longitudinal and transverse cells arrangement. This distortion is determined by the development of possible carbonate calcium crystals on the thalli surface. The ultrastructural analysis (TEM) confirmed that the structure and placement of thylakoids is genus/species specific.
6
Content available remote Cyanobacteria and cyanotoxins in Polish freshwater bodies
EN
In this work, the authors examined the presence of cyanobacteria and cyanotoxins in 21 samples collected from fresh water bodies located in 5 provinces in Poland: Lublin (2), Podlasie (1), Pomerania (6), Warmia-Masuria (1) and Wielkopolska (11). In addition, to determine the general pattern of geographical distribution, frequency of cyanobacteria occurrence, and cyanotoxins production, the published data from 238 fresh water bodies in Poland were reviewed. On the basis of these collected results, we concluded that Planktothrix, Aphanizomenon, Microcystis and Dolichospermum were dominant. The general pattern in geographical distribution of the identified cyanobacterial genera was typical of other eutrophic waters in Europe. The production of cyanotoxins was revealed in 18 (86%) of the 21 samples analyzed in the present work and in 74 (75%) of the 98 total water bodies for which the presence of toxins had been examined. Among the 24 detected microcystin variants, [Asp3]MC-RR was most common. These results can be verified when more data from the less explored water bodies in the southern and eastern parts of Poland are available.
EN
The phytoseston flora and heterotrophic bacteria from the two intersecting rivers were studied during the intensive water flow (from October 2006 to May 2007). The physical and chemical measurements indicated that the water quality in the rivers regarding their purity, had slightly improved in the Nielba River and deteriorated in the Wełna River, at the sites behind the intersection zone. It was in the agreement with the studied phytoseston diatom communities (dominated by eutraphentic taxa). Phytoplankton during the winter months was dominated by Aulacoseira granulata. The importance of species from the genera Oscillatoria, Planktolyngbya, Tychonema, Planktothrix, Scenedesmus/Desmodesmus, Nitzschia and Fragilaria increased in spring and autumn. Heterotrophic bacteria occurred in considerably higher numbers in the Wełna River than in the Nielba River, with a significant decrease in the waters of the Wełna River behind the river-intersection. All analyses revealed that the waters in the Wełna River were more polluted with organic compounds than in the Nielba River locations.
EN
Marine algae in inland waters in Poland have been rarely recorded. The distribution of 5 species and 1 subspecies of the Ulva genus (syn. Enteromorpha, Chlorophyta) observed in different inland aquatic ecosystems is reported. The algal distribution was established on the basis of the available literature, unpublished material, and oral reports. Information about the algal morphology and habitat conditions, from all of the 58 reported locations of ulvas in Poland, were assimilated and are presented here. The most widespread species of Ulva in inland waters in Poland was U. intestinalis (syn. Enteromorpha intestinalis) reported at 34 sites, while the rarest species was U. paradoxa (syn. Enteromorpha paradoxa), recorded at 2 sites. Species of Ulva have been reported at a range of inland aquatic ecosystems, but most commonly in lakes and small water-courses, such as ditches, channels and creeks. Most of the reported sites of penetration of Ulva (Enteromorpha) inland are concentrated in northwestern and central Poland.
EN
The chlorococcalean flora from two crossed rivers during the summer period (from July to September 2001 and 2002) was examined. Phytoseston communities were collected from the Wełna and Nielba rivers before and behind the cross-rivers as well as from the central place of the cross-rivers. Species belonging to 6 dominant genera: Scenedesmus, Pediastrum, Monoraphidium, Ankistrodesmus, Coelastrum and Tetraedron were found in both rivers. At most of the stations located along the Wełna and Nielba rivers after their crossing a trend of increasing green algae species richness together with an increase in the total species number of cells was observed. Furthermore, it was found that the Wełna river takes over some of the Nielba phytoseston species.
EN
The studies on the changes in phytoplankton composition against a background of selected physico-chemical factors of water in Lake Laskownickie (near Wagrowiec, Poland) were carried out in spring-summer seasons of 1993 to 1995. The changes in the qualitative and quantitative composition of phytoplankton and dynamics of Cyanoprocaryota populations in the vegetation season were connected with high concentrations of the phytoplankton biomass (10-70 mg dm^3), chlorophyll a (18.7-195.7mug dm^3) and biogens (Tot. P 0.040-1.100 mg P dm^3; Tot. N 3.77-12.00 mg dm^3). The blooms of Cyanoprocaryota occured in this reservoir each year. They were dominated by species such as: Plankto-thrix agardhii (Gom.) Anagnostidis et Komarek, Limnothrix redekei (Van Goor) Meffert, Aphanizomenon issatschenkoi (Vsac) Prosk-Lavr, Pseudoanabaena limnetica (Lemm.) Kom.. During blooms, the changes of the composition of companion taxa were observed.
EN
The examined Lake Lubaskie Duze covering the area of 41.5 ha is a dimictic lake a mean depth of 12 m (max. depth 16 m). The systematic observations of phyto- and zooplankton changes together with the selected physico-chemical parameters of water which were carried out for this lake during 1991-1996 showed its mesotrophic character declining towards eutrophy . In 1996, the research was expanded to the analyses of the plankton dynamics in the zones of rushes and submerged vegetation. The purpose of this research was to examine qualitative and quantitative changes of plankton inhabiting various habitats. The samples were collected along the transect starting from rushes to the area of open water (pelagic zone). The sampling was performe at four stations: station 1 - zone of rushes, community of reed and cattail; station 2 - zone of open water area between stations 1 and 3; station 3 - zone of submerged vegetation, community of hornwort; station 4 - open water (pelagic zone). Taking into consideration the spatial distribution of plankton, the differences in the taxonomic groups inhabiting the zones along the transect were noted. In the zone of submerged vegetation, the higher species diversity and greater numbers of specimens were observed than in the zone of rushes.
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