Wyniki wyszukiwania

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Preliminary studies of sediments from the Dobczyce drinking water reservoir

100%

Golas J., Kubica B., Reczynski W., Kwiatek W. M., Jakubowska M., Skiba M., Stobinski M., Dutkiewicz E. M., Posmyk G., Jones K. W., Olko M., Gorecki J.

Polish Journal of Environmental Studies

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2005

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tom 14

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nr 5

The analysis of river and lake sediments indicates that the physical, chemical, biochemical and geochemical processes that influence the fate of toxic compounds and elements in sediments are numerous and complex (for example: sorption – desorption, oxidation – reduction, ion-exchange, biological activity). Due to the above-mentioned general statement, only a long term and complex research programme can lead to satisfactory answers to the questions relating to possible changes of water and environmental quality in the future. The aim of our study consisted in physical and chemical characterisation of sediments in in-depth profiles taken from the Dobczyce reservoir in southern Poland that is a main source of drinking water for the city of Kraków. Due to morphological reasons, 7 layers of sediment samples were distinguished from the ground level to about 90 cm below (total thickness of the sediments in the sampling site). Analysis of grain size distribution and application of x-ray diffraction method, enabled mineralogical description of sediments. The use of proton-induced x-ray emission (PIXE) and atomic absorption spectrometry (AAS) revealed elemental composition of the samples (Al, P, K, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn). Concentrations of natural ⁴⁰K and artificial ¹³⁷Cs radionuclides were determined by the use of gamma spectrometry. The following facts were established: 1) the oldest (deepest) and newest, recently deposited layers of sediments are similar in their physical and chemical properties. It means that the inflow of contaminants and biogenic compounds to the reservoir has changed little since it was constructed and filled with water; 2) the severe flood in 1997 changed significantly sediment composition and, in fact, led to purification of sediments in the Dobczyce reservoir.

2

Growth rate of nase, Chondrostoma nasus [L.], in the Dobczyce Reservoir and in the River Raba above the Reservoir

100%

Klich M.

Acta Hydrobiologica

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2000

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tom 42

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nr 3-4

3

Manganese and iron accumulation in a eutrophic, submontane dam reservoir - the role of speciation

100%

Szarek-Gwiazda E.

Oceanological and Hydrobiological Studies

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2005

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tom 34

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nr 3

4

Comments on the diet of Asplanchna priodonta [Gosse, 1850] in the Dobczycki dam reservoir on the basis of field sample observations

84%

Pociecha A., Wilk-Wozniak E.

Oceanological and Hydrobiological Studies

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2008

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tom 37

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nr 3

63-69

5

Changes in the biomass and structure of phytoplankton in the Dobczyce Reservoir [Southern Poland]

84%

Wilk-Wozniak E.

Acta Hydrobiologica

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1996

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tom 38

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nr 3-4

In the period 1990-1994 the average biomass of phytoplankton increased from 2.9 to 9.9 mg dm-3. In 1990 Cryptophyceae dominated (29% of total biomass), in 1991-1993 Bacillariophyceae (20.5-35%), and in 1994 Cyanophyta (39%). On the turn of winter and the beginning of spring a mass development of the diatoms Asterionella formosa Hass., Cyclotella sp., and Stephanodiscus hantzschii Grun. occurred every year. The diatom density was over 4000 ind. cm-3. On the turn of summer and the beginning of autumn cyanobacterial blooms were observed of Woronichinia naegeliana (Unger) Elenkin and Microcystis aeruginosa Kütz. with a density of 950 colonies cm-3.

6

Mineralization of phycodetritus in water column of the submountain dam reservoir [Southern Poland]: simulated experiments

84%

Starzecka A., Bednarz T.

Polish Journal of Ecology

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2004

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tom 52

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nr 3

The mineralization (expressed as O₂ consumption and CO₂ release) of Scenedesmus quadricauda detritus was investigated in homothermal (spring, autumn) and stratified (summer, winter) conditions, using the MicroOxymax respirometer. In experiments, the rate of O₂ consumption and CO₂ release, sedimentation rate and time of mineralization of phycodetritus in water from 2.5, 7.5 and >17 m depth were determined. It was found that 41% and 100% of detritus carbon (31.4 mg C dm⁻³) added to the water could be mineralized in whole water column in time 28 days during spring and 37 days during autumn homothermal conditions. In summer stratification periods 61% of the detritus carbon during 29 days, and in winter 100% during 35 days, could be mineralised down to the depth 18 m. The rate of mineralization of phycodetritus depends on temperature and activity of microflora. The differences in the rate of O₂ consumption and CO₂ release between particular layers of water and seasons were statistically significant in the majority of cases.

7

Assessment of the trophic state of the water of the Dobczyce dam reservoir and its selected tributaries [Southern Poland] by the method of the Chlorella pyrenoidosa Chick. biotest

84%

Bednarz T.

Acta Hydrobiologica

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1995

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tom 37

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nr 2

An algal growth test was used to show the trophic state of the water of the Dobczyce Reservoir and its direct tributaries. The Dobczyce Reservoir showed a lower trophic level than its affluents. So far, the reservoir has been mesotrophic, but shows a tendency to increase from year to year. The trophic level of its water was less than that of the Goczałkowice Reservoir, which was eutrophic.

8

Heavy metal contents in stone loach Noemacheilus barbatulus [L.] [Cobitidae] living in the river above and below dam reservoir [Dobczyce Reservoir, Southern Poland]

84%

Szarek-Gwiazda E.

Polish Journal of Ecology

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1999

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tom 47

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nr 2

9

Model assessing changes of the Raba River runoff caused by the Dobczyce Reservoir [Poland]

84%

Pociask-Karteczka J., Czulak J., Niedbala J., Niedbala J.

Polish Journal of Environmental Studies

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2003

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tom 12

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nr 4

The Dobczyce Reservoir is one of the new man-made lakes located at the Raba River in the Carpath-ian Mountains. The drainage basin is underlain by flysch with a high proportion of sandstone. The river is characterized by great variability of runoff. The mean annual discharge is about 12 m3·s-1. The dam began to function in 1986 and about 2.1 m3·s-1 of fresh water has been withdrawn from the reservoir to Cracow. The model was calculated for estimating Raba River discharge down the reservoir. Analysis of the river discharge before and after the dam construction has shown that one of the most important effects of the Dobczyce Reservoir is a change of the Raba River runoff: mean minimum and maximum monthly dis-charges increased and mean monthly discharge decreased.

10

Consequences of the basin morphology for fish community in a deep-storage submontane reservoir

84%

Amirowicz A.

Acta Hydrobiologica

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1997

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tom 39

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nr Suppl.1

11

Influence of cadmium and lead partitioning in water and sediment on their deposition in the sediment of a eutrophic dam reservoir

84%

Szarek-Gwiazda E., Mazurkiewicz-Boron G.

Oceanological and Hydrobiological Studies

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2006

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tom 35

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nr 2

12

Effect of the summer flood on the ecosystem of the Dobczyce Reservoir [Southern Poland]

84%

Pociecha A., Wilk-Wozniak E.

Acta Hydrobiologica

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2000

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tom 42

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nr 1-2

13

Horizontal, vertical and seasonal distribution of heavy metals in the water of a stratified dam reservoir [Dobczyce Reservoir, Southern Poland]

84%

Szarek-Gwiazda E.

Acta Hydrobiologica

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1998

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tom 40

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nr 2

14

Formation of phytoplankton in the first years of existence of the water supplying reservoir [Southern Poland] against the background of increased eutrophication process

84%

Pajak G.

Oceanological and Hydrobiological Studies

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2003

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tom 32

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nr 4

15

Rola gleby w zabezpieczeniu czystości wód zbiornika wodnego w Dobczycach. Cz. I. Typologia i ogólna charakterystyka gleb zlewni Ratanicy i Dębnika

67%

Adamczyk B., Niemyska-Lukaszuk J., Drozdz-Hara M.

Acta Agraria et Silvestria. Series Silvestris

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1989

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tom 28

16

Towards the optimal foraging strategy: is seasonal shift in the diet of Cormorants Phalacrocorax carbo ( L.) in a dam reservoir the effect of water temperature or size pattern in fish assemblages?

67%

Gwiazda R., Amirowicz A.

Polish Journal of Ecology

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2010

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tom 58

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nr 4

According to optimal foraging theory the prey choice strongly affects the benefitcost ratios. Predators search prey giving the highest benefit and costs of all components of predation (i.e. prey search, encounter, pursuit, capture, and handling) may be considerably reduced if the prey is more available. The study on Cormorant diet and the species composition of prey fish assemblages in the Dobczyce Reservoir (area 985 ha, submontane, eutrophic reservoir in Southern Poland) in spring (May-June) and in autumn (OctNov) showed differences in the food composition and the prey size affected by seasonal changes in fish availability. The diet of Cormorant included eleven fish species and the dominant species in the food was roach in spring (72%) and roach and perch in autumn (49% in total). Roach and perch had the highest share in prey assemblages too (56% in spring, and 53% in autumn). Significant preference toward roach in spring was found. The share of roach and perch did not changed seasonally and could not explain the change in the composition of Cormorant diet. The range of the total length (LT) of fish in Cormorant diet was 3.5–35.2 cm. Diet consisted of distinctly smaller fish in autumn. Relative number of small fish was ca 3 times greater in this period compared to spring. Weighted mean of fish TL in prey assemblage was 20.0 cm for roach and 12.5 cm for perch in spring, and 11.8 and 8.1 in autumn, respectively. The proportion of average weight of roach (W = 0.004074 LT³‧³³⁴) to that of perch (W = 0.005779 LT³‧²⁶⁰) was greater in spring (4.1:1) than in autumn (2.9:1). Probably it can explain the diet shift in autumn. The switch to smaller but more abundant fish in autumn was not related to temperature but to fish availability which reduced the cost of searching and the prey may be easily found.

17

Glony pod kontrola

67%

Starmach J.

Academia. Magazyn Polskiej Akademii Nauk

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2005

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nr 1

37-39

18

Energy flow through the algal and bacterial communities in the surface layer of bottom sediments of the River Raba and Dobczyce Reservoir [Southern Poland]

67%

Bednarz T., Starzecka A.

Acta Hydrobiologica

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1997

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tom 39

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nr 1-2

The biomass, production, respiration of algae and heterotrophic bacteria were determined in the surface layer (0.5 cm) of bottom sediments in the river above and below the reservoir, and in the backwater and littoral zone of the reservoir during the vegetation periods (April-October) in 1993 and 1994. The amounts of energy flowing (assumed as the sum of biomass, production, and respiration) through algae and bacteria communities at particular stations were respectively 64-387 and 39-142 kJ m-2 d-1. From the pool of total energy bio- accumulated by heterotrophic bacteria and algae, 87-98% originated from algae, but from the pool of energy released 76-97% was due to heterotrophic bacteria.

19

Relationships among nutrients, algae and sediments between two different lotic ecotones [Dobczyce Reservoir, Southern Poland]

67%

Fleituch T.

Polskie Archiwum Hydrobiologii

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2000

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tom 47

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nr 2

20

Metabolic activity of microorganisms in the bottom sediments of a stream and of the Dobczyce dam-reservoir in the region of the Myslenice Basin [Southern Poland]

67%

Starzecka A., Bednarz T.

Polskie Archiwum Hydrobiologii

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1997

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tom 44

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nr 3

Ograniczanie wyników

Preliminary studies of sediments from the Dobczyce drinking water reservoir

Growth rate of nase, Chondrostoma nasus [L.], in the Dobczyce Reservoir and in the River Raba above the Reservoir

Manganese and iron accumulation in a eutrophic, submontane dam reservoir - the role of speciation

Comments on the diet of Asplanchna priodonta [Gosse, 1850] in the Dobczycki dam reservoir on the basis of field sample observations

Changes in the biomass and structure of phytoplankton in the Dobczyce Reservoir [Southern Poland]

Mineralization of phycodetritus in water column of the submountain dam reservoir [Southern Poland]: simulated experiments

Assessment of the trophic state of the water of the Dobczyce dam reservoir and its selected tributaries [Southern Poland] by the method of the Chlorella pyrenoidosa Chick. biotest

Heavy metal contents in stone loach Noemacheilus barbatulus [L.] [Cobitidae] living in the river above and below dam reservoir [Dobczyce Reservoir, Southern Poland]

Model assessing changes of the Raba River runoff caused by the Dobczyce Reservoir [Poland]

Consequences of the basin morphology for fish community in a deep-storage submontane reservoir

Influence of cadmium and lead partitioning in water and sediment on their deposition in the sediment of a eutrophic dam reservoir

Effect of the summer flood on the ecosystem of the Dobczyce Reservoir [Southern Poland]

Horizontal, vertical and seasonal distribution of heavy metals in the water of a stratified dam reservoir [Dobczyce Reservoir, Southern Poland]

Formation of phytoplankton in the first years of existence of the water supplying reservoir [Southern Poland] against the background of increased eutrophication process

Rola gleby w zabezpieczeniu czystości wód zbiornika wodnego w Dobczycach. Cz. I. Typologia i ogólna charakterystyka gleb zlewni Ratanicy i Dębnika

Towards the optimal foraging strategy: is seasonal shift in the diet of Cormorants Phalacrocorax carbo ( L.) in a dam reservoir the effect of water temperature or size pattern in fish assemblages?

Glony pod kontrola

Energy flow through the algal and bacterial communities in the surface layer of bottom sediments of the River Raba and Dobczyce Reservoir [Southern Poland]

Relationships among nutrients, algae and sediments between two different lotic ecotones [Dobczyce Reservoir, Southern Poland]

Metabolic activity of microorganisms in the bottom sediments of a stream and of the Dobczyce dam-reservoir in the region of the Myslenice Basin [Southern Poland]