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Habitat diversity of some lakes in the Lublin Polesie Region

100%

Adamczuk M.

Acta Agrophysica

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2002

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tom 67

2

Small water bodies and lakes protected under EU Habitats Directive - results of the pilot wildlife monitoring in the Lubelskie region

84%

Peczula W., Banach B.

Teka Komisji Ochrony i Kształtowania Środowiska Przyrodniczego

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2013

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tom 10

3

Rotifer invasion? On appearance and abundance of tropical species in lakes of North-Eastern Poland

84%

Ejsmont-Karabin J.

Polish Journal of Ecology

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2014

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tom 62

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nr 4

Trichocerca simoneae De Smet described in 1989 has since been found in tropical and subtropical areas, but was not recorded in Poland before World War II. A bibliography of Polish rotifers by Wiszniewski (1953), although very comprehensive, does not refer to T. simoneae. However, in the studies of plankton of the dystrophic lake, i.e. humic one with water rich in humic acids, acidic pH and brown coloured, carried out in the years 1998–2000, the species dominated. Here, studies in 39 small, inter-forest lakes of north-eastern Poland revealed T. simoneae in 15 of them, often at high densities, up to ca 6000 ind L-1. The possible reasons for this ‘invasion’ are: (1) zooplankton communities in dystrophic lakes are unsaturated with biotic interactions too weak to exclude invaders; CCA and RDA analyses showed that T. simoneae preferred habitats with low number of zooplankton species of low density and dystrophic lakes seem to offer such habitats; (2) long-term deposition of rotifer resting eggs is probably more successful in sediments decaying at low rates. The latter possibility seems to be confirmed by observed in the littoral zone of dystrophic lakes appearance from time to time, of rare, mostly tropical species of Rotifera (e.g., Lecane hornemnni, L. monostyla, L. sola).

4

Occurrence of picocyanobacteria during a permanent desmid bloom in a small dystrophic lake

84%

Szelag-Wasielewska E.

Oceanological and Hydrobiological Studies

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2005

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tom 34

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nr Suppl.3

5

Diel changes in the plankton communities of the ecotone zone of a peat mat of the dystrophic lake Glodne Jeziorko [Drawienski National Park]

84%

Kuczynska-Kippen N., Klimaszyk P., Szelag-Wasielewska E.

Acta Agrophysica

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2006

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tom 07

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nr 2[133]

6

Pediastrum privum (Printz) Hegewald (Chlorophyceae) in Lake Male Zmarle, Northern Poland

67%

Kowalska J., Wolowski K.

Oceanological and Hydrobiological Studies

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2010

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tom 39

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nr 3

7

Seasonal changes in autotrophic picoplankton in a dystrophic lake

67%

Szelag-Wasielewska E.

Teka Komisji Ochrony i Kształtowania Środowiska Przyrodniczego

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2004

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tom 01

8

Phototrophic microflora of dystrophic Lake Seczek, Masuria, Poland

67%

Grabowska M., Hindak F., Hindakova A.

Oceanological and Hydrobiological Studies

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2014

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tom 43

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nr 4

9

Aktualny stan pla torfowcowego w dystroficznym jeziorze Smolak 28 lat po zakonczeniu wapnowania i nawozenia mineralnego

67%

Hutorowicz A.

Acta Agrophysica

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2003

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tom 01

|

nr 1[86]

97-107

10

The ichthyofauna of the dystrophic Lake Smolak (northern Poland) in light of selected physical and chemical water conditions thirty years after the conclusion of liming and fertilization

67%

Hutorowicz A., Kapusta A., Krzywosz T., Hutorowicz J.

Archives of Polish Fisheries

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2005

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tom 13

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nr 2

The aim of ichthyofauna studies conducted in Lake Smolak (northern Poland) in the 2002-2004 period was to evaluate species richness, growth rate, and fish assemblage structure in light of environmental conditions. This initially dystrophic lake, which, in the 1950s, was inhabited by only two fish species – perch, Perca fluviatilis L., and pike, Esox lucius L., was subjected to experimental liming and fertilization (to stimulate eutrophication) and stocking in the 1971-1974 period. Currently, the ichthyofauna of the lake is comprised of ten species belonging to four families. The density of the fish in this lake is not high; the most numerous are roach, Rutilus rutilus (L.) and bream, Abramis brama (L.). Roach was characterized by a rapid growth rate, but that of bream was very slow. The environmental parameters of the lake undoubtedly have a negative impact on the ichthyofauna, especially the gradients of and seasonal variation in the physical and chemical parameters of the water as well as the absence of submerged hydrophytes and the limited occurrence of helophytes.

11

The effect of humic substances on nitrogen cycle bacteria

67%

Piechowiak M., Kraska M.

Oceanological and Hydrobiological Studies

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2008

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tom 37

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nr Suppl.1

12

Dystrophy or eutrophy: phytoplankton and physicochemical parameters in the functioning of humic lakes

67%

Poniewozik M., Wojciechowska W., Solis M.

Oceanological and Hydrobiological Studies

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2011

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tom 40

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nr 2

13

Black box: what do we know about humic lakes?

67%

Kostrzewska-Szlakowska I., Jasser I.

Polish Journal of Ecology

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2011

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tom 59

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nr 4

The classic description of a coloured lake implies low productivity (Nauman 1921; cited in Jones 1922). Wetzel (1975) initially classified dystrophic lakes as oligotrophic, but later stated that dystrophy represents a subset of trophic continuum, from oligotrophy to eutrophy, rather than a parallel concept (Wetzel 2001). Other more recent studies have demonstrated that many dystrophic lakes are mesotrophic or even eutrophic (Jones 1992, Keskitalo and Eloranta 1999). Furthermore, the pH of their water can range between 4.1 and 8.0 (Keskitalo and Eloranta 1999), and it is clear that this property should be treated as an additional factor affecting their trophic state. Our own findings from humic acidic lakes of different trophic states and from one posthumic lake (originally humic, now eutrophic with pH = 7), together with data from the literature describing about 40 brown-water lakes, can be used to verify general statements concerning microbial ecology paradigms for humic waters: 1) the bacterial to phytoplankton biomass ratio is generally high and increases with lake water colour; 2) there is a positive relationship between bacterial biomass and the concentration of organic matter expressed in dissolved organic carbon units and as water colour; 3) bacterial production is generally higher than primary production; 4) there is a good correlation between bacterial production and humic matter content; 5) the pH of the water/sediments can modify these relationships by accelerating the rates between the variables mentioned above in neutral pH and/or limiting them in low pH. In this review we show that these statements are not always confirmed by detailed analyses of the available data, suggesting that in addition to the concentration of humic matter, the lake productivity, expressed as chlorophyll a and primary production, also influences the ratios between the compared variables. We also demonstrate that despite being weaker, the relationships between phytoplankton-related variables and bacterial abundance and production in low pH lakes are similar to those in circum-neutral humic waters. In addition, we show that the conversion factors and the proportion of active bacterial cells greatly influence all of the aforementioned relationships.

14

The diversity of the species composition and the life strategy of algae in peatbogs surrounding two dystrophic forest lakes

67%

Jacunska U.

International Journal of Ecohydrology and Hydrobiology

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2003

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tom 03

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nr 2

197-202

15

Contribution to the limnology of three dystrophic lakes of the Drawienski National Park, Northern Poland

67%

Joniak T., Kraska M.

Acta Hydrobiologica

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1999

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tom 41

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nr Suppl.6

16

Spatial distribution of zooplankton communities between the Sphagnum mat and open water in a dystrophic lake

67%

Kuczynska-Kippen N.

Polish Journal of Ecology

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2008

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tom 56

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nr 1

The composition and dynamics of zooplankton (Rotifera, Crustacea) communities were studied in a dystrophic lake (Drawieński National Park, northern Poland). The investigated lake was a typical mid-forest lake of a small area (ca. 0.65 ha) but relatively deep (Zmax = 6.8m) and covered with a peat (Sphagnum sp.) mat. The study was made in the shallow part of the lake (Z = 0.5 m). Zooplankton was collected twice in August 2004, in triplicate subsamples, taken from three stations (1. under the peat mat, 2. the transitional zone between the peat mat and open water area and 3. open water zone) from two different sites within the same lake. The distance between sampling stations within a transect was ca. 1.5 m. The whole area under study was not greater than 10 m2. Therefore the results concern the very small-scale distribution of zooplankton. The aim of the study was to find out whether spatial segregation of the zooplankton community and the dominating species between the Sphagnum mat and open water zone as well as in the transitional zone between both zones takes place in a dystrophic lake and whether the moss mat can be considered as an anti-predator refuge. Both the species number and zooplankton densities differed between the stations along a transect, being the highest (40 zooplankton species and mean 150 ind l–1 for the whole zooplankton community) in the peat mat and lowest (12 species and 72 ind l–1) in the open water zone. Humic-water species constituted 24% of the species composition of rotifer and 14% of the crustacean community. Cladocerans prevailed numerically over rotifers. Dominating species – Bdelloidae, Keratella cochlearis Gosse, Polyarthra vulgaris (Carlin), Synchaeta pectinata Ehrenberg, Trichocerca insignis Carlin, Alonella excisa (Fischer), Ceriodaphnia quadrangula (O.F. Muller) – revealed a differentiated pattern of spatial distribution. The mean Shannon-Weaver biodiversity index of zooplankton was not notably high and amounted to 1.45. The highest values were found in the peat mat (mean – 1.76 for rotifers and 0.67 for crustaceans), while the lowest values were found in the open water (0.99 and 0.36 respectively). These results suggest that in the site connected with Sphagnum moss in a humic lake more diverse and abundant zooplankton occurs in relation to other habitats. The differences in zooplankton distribution between the peat mat and the open water zone of the dystrophic lake seems to be affected by biological interactions which relate to predator presence, both vertebrate and invertebrate, and competition between large cladocerans and smaller rotifers. Due to the dominance of larger forms of zooplankton it may be supposed that invertebrate predators may have a more pronounced effect. The habitat within the Sphagnum moss can be considered as a predictable refugium.

17

Autotrophic picoplankton [APP] in four lakes of different trophic status: composition, dynamics and relation to phytoplankton

67%

Jasser I.

Polish Journal of Ecology

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2002

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tom 50

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nr 3

18

Tendencje zmian wybranych parametrow fizyczno-chemicznych wody w dystroficznym jeziorze Smolak [Kraina Wielkich Jezior Mazurskich] w ciagu 27 lat od zakonczenia wapnowania i nawozenia mineralnego

51%

Hutorowicz A., Hutorowicz J.

Acta Agrophysica

|

2002

|

tom 67

115-128

Ograniczanie wyników

Habitat diversity of some lakes in the Lublin Polesie Region

Small water bodies and lakes protected under EU Habitats Directive - results of the pilot wildlife monitoring in the Lubelskie region

Rotifer invasion? On appearance and abundance of tropical species in lakes of North-Eastern Poland

Occurrence of picocyanobacteria during a permanent desmid bloom in a small dystrophic lake

Diel changes in the plankton communities of the ecotone zone of a peat mat of the dystrophic lake Glodne Jeziorko [Drawienski National Park]

Pediastrum privum (Printz) Hegewald (Chlorophyceae) in Lake Male Zmarle, Northern Poland

Seasonal changes in autotrophic picoplankton in a dystrophic lake

Phototrophic microflora of dystrophic Lake Seczek, Masuria, Poland

Aktualny stan pla torfowcowego w dystroficznym jeziorze Smolak 28 lat po zakonczeniu wapnowania i nawozenia mineralnego

The ichthyofauna of the dystrophic Lake Smolak (northern Poland) in light of selected physical and chemical water conditions thirty years after the conclusion of liming and fertilization

The effect of humic substances on nitrogen cycle bacteria

Dystrophy or eutrophy: phytoplankton and physicochemical parameters in the functioning of humic lakes

Black box: what do we know about humic lakes?

The diversity of the species composition and the life strategy of algae in peatbogs surrounding two dystrophic forest lakes

Contribution to the limnology of three dystrophic lakes of the Drawienski National Park, Northern Poland

Spatial distribution of zooplankton communities between the Sphagnum mat and open water in a dystrophic lake

Autotrophic picoplankton [APP] in four lakes of different trophic status: composition, dynamics and relation to phytoplankton

Tendencje zmian wybranych parametrow fizyczno-chemicznych wody w dystroficznym jeziorze Smolak [Kraina Wielkich Jezior Mazurskich] w ciagu 27 lat od zakonczenia wapnowania i nawozenia mineralnego