Wyniki wyszukiwania - Biblioteka Nauki

1

Wykorzystanie ramienic w fitoindykacji

100%

Pełechaty M.

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2006

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tom R. 14, nr 3

98-102

PL

Celem artykułu jest przedstawienie aktualnego stanu na temat reakcji ramienic na stan trofii, a szczególnie jego bezpośrednie symptomy w postaci pogarszających cię warunków świetlnych, w kontekście możliwości wykorzystania ramienic w fitoindykacji. Rozpatrzono strategie stosowane przez ramienice w jeziorach głębokich i płytkich, obrazując je przykładami zachowań ramienic m.in. w jeziorach Ziemi Lubuskiej.

EN

The aim of the paper was to present the current knowledge of the ecological requirements of charophytes which could allow us to apply those macroalgae in phytoindication. Since charophytes are sensitive to the trophy level, and particularly to its reflection in the light conditions, their reactions are discussed in the context of the depth of ecosystems. In deep lakes charophyte flora and vegetation tend to reflect biotop conditions and may be generally applied as not only sensitive but also accurate bioindicators. In shallow lakes, by contrast, macrophytes, and particularly charophytes, are by numerous mechanisms responsible for the shift from turbid to a clear water state. Thus, their role as bioindicators seems to be - at least in same cases - rather problematic. Since then, charophytes should be sensibly applied in phytoindication.

2

The in situ influence of Ceratophyllum demersum on a phytoplankton assemblage

63%

Pełechata A. , Pełechaty M.

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tom Vol. 39, No.1

95-101

EN

The aim of this work was to present a quantitative and qualitative analysis of a phytoplankton assemblage under the influence of Ceratophyllum demersum L. during a two-year field study. Literature data obtained under laboratory conditions indicate that C. demersum may cause a decrease in the blue-green algae biomass, which is considered to be evidence of the significance of allelopathy. The observations reported in the current paper indicated that there was no clear effect on cyanoprokaryota whereas decreases in the quantity of Cryptophyta, Dinophyta, Chlorophyta, and Chrysophyceae are noted.

3

Rola ramienic w ocenie stanu ekologicznego jezior

63%

Pukacz A. , Pełechaty M.

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2006

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tom R. 14, nr 3

103-106

PL

W sezonach wegetacyjnych 2002-2005 przeprowadzono interdyscyplinarne badania 30 zróżnicowanych morfometrycznie jezior, zlokalizowanych na Pojezierzu Lubuskim. Celem badań było określenie stopnia zróżnicowania badanych jezior na tle udziału powierzchniowego oraz liczby zbiorowisk charofitów jak również ich znaczenia w ocenie stanun ekologicznego.

EN

In the vegetation seasons 2002 - 2005 multidisciplinary investigations of 30 lakes located on Lubuskie Lakeland (mid-Western Poland) were carried out. The aim of this paper, based on the above studies, was to characterize the significance of charophytes in the differentiation of investigated lakes and their applicability in the ecological status assessment as well. To characterize the differentiation of studied lakes against the background of analyzed properties principal component analysis (PCA) was undertaken. The results demonstrated that charophytes significantly differentiated among the lakes studied. Visibly better habitat conditions as well as lower biomass of pelagic phytoplankton were found in lakes with abundant and diverse charophyte vegetation. Lakes with poorly developed or without charophytes were characterized by significantly worse habitat conditions and higher biomass. Moreover it was assumed that interrelationships between the charophyte coverage and phytoplankton biomass and visibility can play a significant role in functioning of lakes and their ecological status assessment.

4

Rzadkie i cenne ramienice Ziemi Lubuskiej

63%

Pełechaty M. , Pukacz A.

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2006

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tom R. 14, nr 3

111-113

PL

Celem pracy było przedstawienie różnorodności florystycznej ramienic w różnych typach ekosystemów wodnych (jeziora, stawy hodowlane, rowy, starorzecza) regionu Ziemi Lubuskiej. Materiały zebrano w czasie badań roślinności szuwarowej i wodnej w latach 2000-2005.

EN

The aim of the paper was to present the floristic diversity of charophytes (Characeae family) in different aquatic environments of the region of Ziemia Lubuska. Material was collected during the study of rush and aquatic vegetation carried out in the years 2000 - 2005. From amongst 34 Polish species of the Characeae family 22 were found, representing all 5 genera known from Poland, including Lychnothamnus barbatus, a very rare on an international scale species, the only one representative of this genus world-wide. 10 of them are protected species. Chara species were frequently noted. Interestingly, out of 9 Nitella species 7 were found, including 5 protected species. For Nitella batrachosperma first known these days locality was recorded. Considering charophyte vegetation, out of 30 Polish associations from the class Charetea 15 were found in the region. Considering 55 lakes surveyed, charophytes were found in 42 lakes. The highest number of species per lake was 8, and the highest number of charophyte communities found was 7.

5

Środowiskotwórcza rola ramienic

63%

Pełechaty M. , Gąbka M.

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2006

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tom R. 14, nr 3

93-97

PL

Celem artykułu był przegląd danych literaturowych dotyczących pośrednich i bezpośrednich mechanizmów, dzięki którym ramienicom przypisuje się środowiskową rolę w ekosystemie wodnym. Jak wynika z przedstawionego przeglądu znaczenie makrofitów wodnych, w tym ramienic, w sieci zależności wewnątrzekosystemalnych jest ogólnie przyjęte w przypadku jezior płytkich. Konieczne są jednak dalsze badania, zwłaszcza dotyczące allelopatii in situ.

EN

The aim of the paper was to review the literature data on the direct and indirect influences of charophytes on planktonic algae and cyanoprokaryots. Possible mechanisms are presented regarding the charophyte-related shifts in habitat conditions as well as allelopathic interplay between charophytes and phytoplankton. Main concepts and, also, some controversies are discussed and illustrated with the results of the authors in situ-studies. Due to up-to-date literature the importance of macrophytes, including charophytes, is commonly agreed upon, particularly for shallow lakes. However, further studies, concerning allelopathy in situ, are required.

6

Zagadnienia klasyfikacji taksonomicznej i syntaksonomii ramienic (characeae) i ich zbiorowisk

63%

Gąbka M. , Pełechaty M.

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2006

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tom R. 14, nr 3

87-92

PL

Celem niniejszej pracy było przedstawienie podejść w klasyfikacji taksonomicznej ramienic na bazie przeglądu literatury. Przedyskutowano problem klasyfikacji i zagadnienień taksonomicznych ramienic, wynikający ze znacznego zróżnicowania morfologicznego oraz konsekwencji przebiegu procesów reprodukcyjnych i odrębności molekularnej.

EN

The aim of the paper was to present main historical and up-to-date concepts in the taxonomy of the family Characeae. Based on the literature data, two complementary approaches are presented: concerning charophyte morphology supplemented with different life histories and current molecular achievements. The present state of Polish charophyte flora is also discussed. Concerning charophyte vegetation, the authors present reviewed syntaxonomical system of Polish charophyte meadows, regarding 30 associations belonging to 5 alliances within the class Charetea fragilis.

7

Zmienność morfologiczna oospor chara fragilis desv. w różnych typach ekosystemów wodnych Wielkopolski (materiały Kolekcji Ramienic Polski profesor Izabeli Dąmbskiej

63%

Boszke P. , Pełechaty M.

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2006

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tom R. 14, nr 3

118-122

PL

Celem prezentowanych badań jest określenie zmienności morfologicznej oospor Chara fragilis w odniesieniu do różnych typów środowisk wodnych. Do badań biometrycznych pobrano oospory z jezior, torfianek, stawów i rowów zlokalizowanych w Wielkopolsce.

EN

The aim of the present study is to investigate variation in morphology of oospores of Chara fragilis Desv. in relation to different types of aquatic ecosystems. Oospores were collected from lakes, peat-hags, ponds and ditches in the Wielkopolska region (materials from Professor Izabela Dąmbska Collection of Charophytes of Poland, Department of Hydrobiology, Adam Mickiewicz University, Poznań, Poland). The analysis of morphometrical criteria covered following features: oospore length, maximum width, length: width ratio, number and width of ridges. Results demonstrated a statistically sound variation among examined aquatic ecosystems. Clearly visible differences were found among lakes, peat-hags and ponds. The last group particularly differed from the rest. Ditches represented intermediate values of the features studied.

8

The relation between charophytes and habitat differentiation in temperate lowland lakes

51%

Pukacz A. , Pełechaty M. , Pełechata A.

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tom Vol. 61, nr 1

105--118

EN

Interdisciplinary investigations of 39 lakes of the Lubuskie Lakeland (mid-Western Poland) were undertaken in the vegetation seasons 2002–2009. The aim of presented study was to characterize the significance of charophytes as indicators of habitat differentiation of lakes using the number of species, number of communities and the percentage share in the phytolittoral area. Each lake was characterized based on the results of macrophyte vegetation, vegetation depth extent, pelagic phytoplankton biomass, lakes area, max. depth, SD visibility, pH, conductivity, O2, total hardness, Ca, Mg, PO4, TP, NH4, NO3, NO2, N org., TN. The statistical analyses (PCA), revealed that the investigated lakes were differentiated according to the basic morphometrical and physicochemical parameters and that the differentiation was reflected in the percentage share of charophytes in phytolittoral (in general – the bigger, deeper and more clear water were the lakes, the greater part of phytolittoral was covered by charophytes). Using simple cluster analysis based on the number of different types of macrophyte communities (helophytes, elodeids, nymphaeids and charophytes) two distinct groups of lakes were distinguished. Charophyte communities were at most responsible for obtained differentiation (one group with 0 or 1 and second with 1–6 charophyte communities). The distinguished groups of lakes differed significantly as regards 12, out of all 18 considered parameters. The greatest differences were evidenced for area, max. depth, SD visibility, Ca, Mg, NH4, NO3, phytoplankton biomass and vegetation depth extent. Similar analyses were made for the number of charophyte species, for which the lakes were divided into four groups (0–1, 2–3, 4–5 and 6–7 charophyte species per lake). In this case 11 parameters significantly differed between distinguished groups of lakes, showing, that better habitat conditions were in the lakes where more charophyte species were stated. The obtained results revealed that all analyzed charophyte indicators (the number of species, number of communities as well as the percentage share in the phytolittoral area) very clearly reflect habitat variation and water quality of lakes and thus may be used as valuable bioindicators of lakes condition.

9

Dry weight and calcium carbonate encrustation of two morphologically different Chara species : a comparative study from different lakes

51%

Pukacz A. , Pełechaty M. , Frankowski M. , Pronin E.

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tom Vol. 45, No. 3

377--387

EN

Two charophyte species (Chara tomentosa Thulli. 1799 and Chara globularis L. 1753) were studied to assess their biomass and CaCO3 production in seven hard-water lakes in Western Poland. In each lake, samples of ten individuals from three study sites were collected for dry weight (DW) and calcium carbonate content (% CaCO3) analyses. Additionally, physicochemical parameters of water collected from the above sampling sites were analyzed. No significant differences were found between the study sites in each lake for any of the analyzed parameters. In all the lakes, DW of C. tomentosa (0.60 ± 0.23 g indiv.-1) was significantly higher and more differentiated than DW of C. globularis (0.11 ± 0.08 g indiv.-1), suggesting species-specificity. The CaCO3 content in DW for C. tomentosa was higher (58.8-70.9%) than in C. globularis (50.1-68.3%), however, it did not reflect the DW differentiation, suggesting lake-specificity. The physicochemical properties of water revealed clear lake-to-lake differentiation. Different correlations between dry weight and calcium carbonate content and lake characteristics were found for each species. The results showed that DW and % CaCO3 are closely related to habitat conditions and different factors may influence the individual biomass of each species.