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Zeitschriftendaten
Format
Zeitschrift
eISSN
1897-3191
Erstveröffentlichung
23 Feb 2007
Erscheinungsweise
4 Hefte pro Jahr
Sprachen
Englisch

Suche

Volumen 39 (2010): Heft 1 (March 2010)

Zeitschriftendaten
Format
Zeitschrift
eISSN
1897-3191
Erstveröffentlichung
23 Feb 2007
Erscheinungsweise
4 Hefte pro Jahr
Sprachen
Englisch

Suche

15 Artikel
Uneingeschränkter Zugang

The effect of environmental factors on filtration and the oxygen consumption rate of the rotifer Brachionus plicatilis: a primary exploration of red tide control

Online veröffentlicht: 08 Apr 2010
Seitenbereich: 3 - 9

Zusammenfassung

Schlüsselwörter

  • red tides
  • water temperature
  • salinity
  • filtration rate
  • oxygen consumption rate
Uneingeschränkter Zugang

The effect of multiple heavy metals on ascorbate, glutathione and related enzymes in two mangrove plant seedlings (Kandelia candel and Bruguiera gymnorrhiza)

Online veröffentlicht: 08 Apr 2010
Seitenbereich: 11 - 25

Zusammenfassung

Abstract

In this study, the effect of multiple heavy metal stress on ascorbate (AsA), glutathione (GSH) and related enzymes was investigated in the leaves, stems and roots of Kandelia candel and Bruguiera gymnorrhiza. Mangrove seedlings were treated with five different concentrations of a heavy metal mixture (Cd2+, Pb2+ and Hg2+). Antioxidants in both the species were analyzed after one month. AsA, GSH, ascorbate peroxidase (APX, EC 1.11.1.11) and glutathione reductase (GR, EC 1.6.4.2) exhibited a similar trend with initial increase and subsequent decrease in response to heavy metal stress. At the highest metal concentration, a significant decrease of AsA and GR was observed in K. candel and B. gymnorrhiza. Glutathione peroxidase (GPX, EC 1.11.1.9) in the leaves, stems and roots of K. candel reached their respective maximal values at the highest metal concentration, whereas GPX activity in roots and stems of B. gymnorrhiza was similar to the controls at higher metal concentrations. Our results demonstrate that AsA, GSH, APX, GR and GPX in K. candel may play more important roles in defending against reactive oxygen species (ROS) than those in B. gymnorrhiza.

Schlüsselwörter

  • Ascorbate-Glutathione cycle
  • ascorbate peroxidise
  • glutathione peroxidise
  • glutathione reductase
  • heavy metal stress
Uneingeschränkter Zugang

Biofilm development on acrylic coupons during the initial 24 hour period of submersion in a tropical coastal environment

Online veröffentlicht: 08 Apr 2010
Seitenbereich: 27 - 38

Zusammenfassung

Abstract

The sequence of biofilm formation on a hard surface during the first 24 hours in a coastal environment was studied by suspending acrylic coupons. Adsorption of carbohydrates, proteins, calcium, magnesium, nitrite, nitrate and phosphate were monitored along with microbes. The results showed that carbohydrate, protein, nitrite and nitrate were adsorbed on the coupons within an hour of exposure. Carbohydrates showed a maximum value of 0.28 mg cm-2 after 24 hours and protein concentration reached up to a maximum of 0.41 mg cm-2. Adsorption of calcium and magnesium was observed after three hours. Settlement of bacteria was also observed on coupons within an hour and diatoms were observed after 15 hours. Diatoms such as Navicula and Nitzschia were the dominant colonizers during the early stages of biofilm development.

Schlüsselwörter

  • biofouling
  • conditioning film
  • fouling community
  • microfouling
  • Kudankulam
Uneingeschränkter Zugang

Peculiarities of macrozoobenthos in the offshore zone of a small artificial post-gravel pit reservoir

Online veröffentlicht: 08 Apr 2010
Seitenbereich: 39 - 59

Zusammenfassung

Abstract

The offshore macrozoobenthos and selected environmental parameters were studied in a small artificial reservoir, created through sand and gravel extraction. The results are rather surprising. Despite the shallow depth and good wind exposure of the reservoir, a thermal and oxygen stratification developed in the summer, causing hypoxic conditions near the bottom, even though the organic matter content in the sediments was <5%. Furthermore, despite the high fish abundance, chaoborids prevailed in zoobenthos, while Tanytarsus sp. and Chironomus sp. co-dominated among chironomids. This study attempts to explain the observed phenomena, though the presented hypotheses still need further confirmation.

Schlüsselwörter

  • artificial reservoir
  • macrozoobenthos
  • offshore zone
  • environmental variables
Uneingeschränkter Zugang

The effect of sodium amidotrizoate on the growth and content of various metabolites in the green alga Chlorella vulgaris Beijerinck

Online veröffentlicht: 08 Apr 2010
Seitenbereich: 61 - 73

Zusammenfassung

Abstract

The aim of this work is to detect how 3,5-diacetamido-2,4,6-triiodosodium benzoate (sodium amidotrizoate), a synthetic derivative of the anti-auxin triiodonezoic acid (TIBA), influences the growth and content of primary metabolites in the green alga Chlorella vulgaris Beijerinck. It strongly suppressed cell number by 6-20%, chlorophyll a by 6-14%, chlorophyll b by 20-24%, total carotenoids by 7-13% and monosaccharides by 7-8% at the concentration of 10-4 M, in comparison to the control. On the other hand, sodium amidotrizoate applied at lower concentrations (10-7 - 10-6 M) acted as a weak stimulator of analyzed biochemical compounds in algal cells. No statistically significant effect was detected with the application of sodium amidotrizoate at a concentration of 10-8 M. It seems that sodium amidotrizoate plays an important role in algal growth and development and probably possesses anti-auxin activity, like TIBA.

Schlüsselwörter

  • 3,5-diacetamido-2,4,6-triiodosodium benzoate (sodium amidotrizoate)
  • TIBA
  • chlorophyll and
  • total carotenoids
  • monosaccharides
  • water-soluble proteins
Uneingeschränkter Zugang

The influence of weather conditions on mid-field ponds situated in a reclaimed area in Sępopolska Plain

Online veröffentlicht: 08 Apr 2010
Seitenbereich: 75 - 84

Zusammenfassung

Schlüsselwörter

  • mid-field ponds
  • water retention
  • water quality
  • meteorological conditions
Uneingeschränkter Zugang

Changes in the structure of phytoplankton in the lowest part of the Cybina River and the Maltański Reservoir

Online veröffentlicht: 08 Apr 2010
Seitenbereich: 85 - 94

Zusammenfassung

Abstract

The floristic composition, abundance, and biomass of phytoplankton in the Cybina River and the Maltański Reservoir were examined from April to October 2005. The analysis of the phytoplankton in the samples revealed statistically significant differences in both composition and abundance. The maximum abundance (39.2 × 103 ind. cm-3) and biomass (56.8 μg cm-3) of phytoplankton was noted in July 2005 at the outlet from the Maltański Reservoir. The lowest phytoplankton density was most often noted at the site located at the inlet of the Cybina River into the Maltański Reservoir. The quantitative and qualitative compositions of the phytoplankton varied at different sites. The highest taxonomical similarity was noted among the samples collected in the reservoir and at the outflow from it.

Schlüsselwörter

  • phytoplankton
  • taxonomic composition
  • abundance
  • biomass
Uneingeschränkter Zugang

The in situ influence of Ceratophyllum demersum on a phytoplankton assemblage

Online veröffentlicht: 08 Apr 2010
Seitenbereich: 95 - 101

Zusammenfassung

Schlüsselwörter

  • allelopathy
  • phytoplankton
  • Cyanoprokaryota
Uneingeschränkter Zugang

Factors which shape the load of water ecosystems with mineral nitrogen runoffs in rural areas

Online veröffentlicht: 08 Apr 2010
Seitenbereich: 103 - 110

Zusammenfassung

Abstract

The present study of factors which affect the load of water ecosystems with mineral nitrogen compounds (N-NH4 and N-NO3) was conducted in the Olsztyn Lake District and covered the time period from 1992 to 1999. Three capture basins were investigated: agricultural drained with a drain network, agricultural drained with a drainage ditch, and agricultural-forested drained with scattered drains and ditches. It was found that the concentration and load of mineral forms of nitrogen in waters running off from rural areas were closely dependent on meteorological conditions, the kind of artificial drainage system in use, and the type of land use in the catchment area. In waters carried away through the drainage systems, average annual concentrations of N-NH4 ranged from 0.16 mg dm-3 (the agricultural capture basin drained with ditches) to 1.09 mg dm-3 (the agricultural catchment drained with a network of drains); the amounts of N-NO3 ranged from 0.29 mg dm-3 (the agricultural-forested catchment) to 8.06 mg dm-3 (the agricultural catchment drained with a network of drains). It was also observed that a larger share of arable lands in the land use structure in a given catchment caused an increase in the load of N-NO3 determined in drained waters. In addition, it was confirmed that the amounts of mineral nitrogen carried away with drained waters annually varied from 12.78 kg N (6.7 kg N on average) per 1 ha of an agriculturally used catchment, of which N-NO3 was a dominant form (12.23 kg).

Schlüsselwörter

  • nitrogen
  • water
  • artificial drainage system
  • rural areas
Uneingeschränkter Zugang

The biodiversity of psammon rotifers in Włocławek Reservoir

Online veröffentlicht: 08 Apr 2010
Seitenbereich: 111 - 117

Zusammenfassung

Abstract

In total 47 rotifer taxa were found in the psammon of Włocławek Reservoir; 36 at the site in Dobiegniewo and 38 at Dobrzyń. Five species were classified as psammobionts, 14 as psammophiles, and the remaining ones as psammoxens. Psammobionts and psammophiles were observed mostly in the psammon at Dobiegniewo.

The highest density of psammon rotifers was noted in the euarenal zone of the flooded part of the reservoir. However, the highest density in the area near the swift current was noted in the hygroarenal zone. While the flooded part of the reservoir had four dominant species of rotifer: Lecane closterocerca, L. scutata, Lepadella patella and Cephalodella catellina, the area near the swift current had only two: Cephalodella catellina and Brachionus quadridentatus.

The most favorable conditions for the development of psammon rotifers was in the flooded area of the reservoir. In comparison with other dam-reservoirs in Poland, the community of these rotifer types in the Włocławek Reservoir was characterized by considerable species richness.

Schlüsselwörter

  • psammon rotifers
  • dam reservoir
  • different sites
Uneingeschränkter Zugang

Using macrophytes as trophic state indicators in upland river waters: a case study of the Czarna Maleniecka River

Online veröffentlicht: 08 Apr 2010
Seitenbereich: 119 - 126

Zusammenfassung

Abstract

The study was conducted on the upper reach of the Czarna Maleniecka River from Furmanów to the ford at Piekło. Nine sampling sites were selected along this 20-km section. Detailed studies of flora and the physicochemical water parameters were performed in the 2004-2006 period. Data on macrophytes were collected with the Mean Trophic Rank (MTR) method. The results of physicochemical measurements were analyzed in reference to the water quality classification of the Polish Ministry of the Environment. Based on the results of these studies, the authors recommend adding two species, Utricularia intermedia and Glyceria fluitans, to the list of bioindicators.

Schlüsselwörter

  • macrophytes
  • bioindication
  • river water quality
  • upland river
  • MTR
Uneingeschränkter Zugang

Relationship between plankton assemblages and habitat characteristics of stands of Typha angustifolia and Chara hispida in Lake Wielkowiejskie

Online veröffentlicht: 08 Apr 2010
Seitenbereich: 127 - 135

Zusammenfassung

Abstract

The results of investigations performed in Lake Wielkowiejskie showed the influence of macrophyte architecture, understood as plant density, on the structure of plankton communities as well as the habitat preferences of particular species in both seasonal and spatial aspects.

Schlüsselwörter

  • phytoplankton
  • zooplankton
  • macrophyte-dominated lake
  • habitat preferences
Uneingeschränkter Zugang

Auto- and heterotrophic picoplankton in a lowland river (Warta River, Poland)

Online veröffentlicht: 08 Apr 2010
Seitenbereich: 137 - 146

Zusammenfassung

Abstract

The structure of plankton in a lowland river was studied with a particular focus on autotrophic as well as heterotrophic picoplankton cells. Water samples were collected in the middle, meridional section of the Warta River in 2005. Heterotrophic picoplankton (HPP) were represented by bacteria varying in size and form, but mainly by cocci and rods. HPP abundance ranged from 3.5 × 106 to 9.5 × 106 cells ml-1. Autotrophic picoplankton (APP) densities were considerably lower and ranged from 1.2 × 103 to 92 × 103 cells ml-1. They were represented by prokaryotes (picocyanobacteria) and eukaryotes (small chlorophytes). Both components occurred together but eukaryotic APP usually prevailed in terms of biomass. In terms of biomass, APP seemed to play a minor role in this ecosystem in comparison with heterotrophic picoplankton.

Schlüsselwörter

  • bacteria
  • picocyanobacteria
  • picoeukaryotes
  • Warta River
Uneingeschränkter Zugang

Analysis of environmental conditions and macro-cations composition (Ca, Mg, Na, K, Sr) in the operculum bones of estuarine fishes in the Pomeranian Bay (southern Baltic Sea)

Online veröffentlicht: 08 Apr 2010
Seitenbereich: 147 - 159

Zusammenfassung

Abstract

The aim of this study was to show the influence of environmental conditions on the ionic composition of fish bones. The analysis concerned the ionic structural composition of the operculum in fish species with different abiotic habitat preferences. Three species of fish were examined: cod, Gadus morhua L., 1758; sea trout, Salmo trutta morpha trutta L., 1758 and perch, Perca fluviatilis L., 1758. Results from hydrochemical research on salinity in the Pomeranian Bay (Southern Baltic) were also utilized. Using the determined ratios (Ca:Mg, Na:Mg, Sr:Ca and Na:Ca in the operculum and Ca:Mg, Na:Mg and Na:Ca in the waters of the Pomeranian Bay), typical correlations were determined for the analyzed habitat.

Macrocation structure in the operculum bones for each species were found to be as follows:

- cod: Ca - 32.3%, Mg - 29.8%, Na - 1.4%, K - 0.8%, Sr - 2.1%;

- sea trout: Ca - 22.8%, Mg - 13.5%, Na - 0.8%, K - 0.2%, Sr - 1.7%;

- perch, Ca - 37.9%, Mg - 15.1%, Na - 2.4%, K - 0.7%, Sr - 1.6%.

Schlüsselwörter

  • estuarine fishes
  • macro-cations in operculum
  • the Pomeranian Bay
Uneingeschränkter Zugang

Diversity of freshwater red algae in Europe

Online veröffentlicht: 08 Apr 2010
Seitenbereich: 161 - 169

Zusammenfassung

Abstract

Of the total number of freshwater red algae (ca. 180 taxa), one third are found in Europe (ca. 60 taxa). Over one third (24 taxa) of European taxa have been found at only one single location or at very few locations. The majority of taxa live in running waters, but some occur in lakes, on wet ground, in hot springs or in garden ponds. Diversity in the Nordic countries of Sweden and Finland seems to be somewhat higher (27 and 28 taxa, respectively) than in the central and southern parts of Europe (e.g. Austria 23, Belgium 22, Hungary 9, Poland 22, Slovakia 15, Switzerland 12 and Spain 20 taxa).

Schlüsselwörter

  • Rhodophyceae
  • freshwater red algae
  • Europe
  • diversity
15 Artikel
Uneingeschränkter Zugang

The effect of environmental factors on filtration and the oxygen consumption rate of the rotifer Brachionus plicatilis: a primary exploration of red tide control

Online veröffentlicht: 08 Apr 2010
Seitenbereich: 3 - 9

Zusammenfassung

Schlüsselwörter

  • red tides
  • water temperature
  • salinity
  • filtration rate
  • oxygen consumption rate
Uneingeschränkter Zugang

The effect of multiple heavy metals on ascorbate, glutathione and related enzymes in two mangrove plant seedlings (Kandelia candel and Bruguiera gymnorrhiza)

Online veröffentlicht: 08 Apr 2010
Seitenbereich: 11 - 25

Zusammenfassung

Abstract

In this study, the effect of multiple heavy metal stress on ascorbate (AsA), glutathione (GSH) and related enzymes was investigated in the leaves, stems and roots of Kandelia candel and Bruguiera gymnorrhiza. Mangrove seedlings were treated with five different concentrations of a heavy metal mixture (Cd2+, Pb2+ and Hg2+). Antioxidants in both the species were analyzed after one month. AsA, GSH, ascorbate peroxidase (APX, EC 1.11.1.11) and glutathione reductase (GR, EC 1.6.4.2) exhibited a similar trend with initial increase and subsequent decrease in response to heavy metal stress. At the highest metal concentration, a significant decrease of AsA and GR was observed in K. candel and B. gymnorrhiza. Glutathione peroxidase (GPX, EC 1.11.1.9) in the leaves, stems and roots of K. candel reached their respective maximal values at the highest metal concentration, whereas GPX activity in roots and stems of B. gymnorrhiza was similar to the controls at higher metal concentrations. Our results demonstrate that AsA, GSH, APX, GR and GPX in K. candel may play more important roles in defending against reactive oxygen species (ROS) than those in B. gymnorrhiza.

Schlüsselwörter

  • Ascorbate-Glutathione cycle
  • ascorbate peroxidise
  • glutathione peroxidise
  • glutathione reductase
  • heavy metal stress
Uneingeschränkter Zugang

Biofilm development on acrylic coupons during the initial 24 hour period of submersion in a tropical coastal environment

Online veröffentlicht: 08 Apr 2010
Seitenbereich: 27 - 38

Zusammenfassung

Abstract

The sequence of biofilm formation on a hard surface during the first 24 hours in a coastal environment was studied by suspending acrylic coupons. Adsorption of carbohydrates, proteins, calcium, magnesium, nitrite, nitrate and phosphate were monitored along with microbes. The results showed that carbohydrate, protein, nitrite and nitrate were adsorbed on the coupons within an hour of exposure. Carbohydrates showed a maximum value of 0.28 mg cm-2 after 24 hours and protein concentration reached up to a maximum of 0.41 mg cm-2. Adsorption of calcium and magnesium was observed after three hours. Settlement of bacteria was also observed on coupons within an hour and diatoms were observed after 15 hours. Diatoms such as Navicula and Nitzschia were the dominant colonizers during the early stages of biofilm development.

Schlüsselwörter

  • biofouling
  • conditioning film
  • fouling community
  • microfouling
  • Kudankulam
Uneingeschränkter Zugang

Peculiarities of macrozoobenthos in the offshore zone of a small artificial post-gravel pit reservoir

Online veröffentlicht: 08 Apr 2010
Seitenbereich: 39 - 59

Zusammenfassung

Abstract

The offshore macrozoobenthos and selected environmental parameters were studied in a small artificial reservoir, created through sand and gravel extraction. The results are rather surprising. Despite the shallow depth and good wind exposure of the reservoir, a thermal and oxygen stratification developed in the summer, causing hypoxic conditions near the bottom, even though the organic matter content in the sediments was <5%. Furthermore, despite the high fish abundance, chaoborids prevailed in zoobenthos, while Tanytarsus sp. and Chironomus sp. co-dominated among chironomids. This study attempts to explain the observed phenomena, though the presented hypotheses still need further confirmation.

Schlüsselwörter

  • artificial reservoir
  • macrozoobenthos
  • offshore zone
  • environmental variables
Uneingeschränkter Zugang

The effect of sodium amidotrizoate on the growth and content of various metabolites in the green alga Chlorella vulgaris Beijerinck

Online veröffentlicht: 08 Apr 2010
Seitenbereich: 61 - 73

Zusammenfassung

Abstract

The aim of this work is to detect how 3,5-diacetamido-2,4,6-triiodosodium benzoate (sodium amidotrizoate), a synthetic derivative of the anti-auxin triiodonezoic acid (TIBA), influences the growth and content of primary metabolites in the green alga Chlorella vulgaris Beijerinck. It strongly suppressed cell number by 6-20%, chlorophyll a by 6-14%, chlorophyll b by 20-24%, total carotenoids by 7-13% and monosaccharides by 7-8% at the concentration of 10-4 M, in comparison to the control. On the other hand, sodium amidotrizoate applied at lower concentrations (10-7 - 10-6 M) acted as a weak stimulator of analyzed biochemical compounds in algal cells. No statistically significant effect was detected with the application of sodium amidotrizoate at a concentration of 10-8 M. It seems that sodium amidotrizoate plays an important role in algal growth and development and probably possesses anti-auxin activity, like TIBA.

Schlüsselwörter

  • 3,5-diacetamido-2,4,6-triiodosodium benzoate (sodium amidotrizoate)
  • TIBA
  • chlorophyll and
  • total carotenoids
  • monosaccharides
  • water-soluble proteins
Uneingeschränkter Zugang

The influence of weather conditions on mid-field ponds situated in a reclaimed area in Sępopolska Plain

Online veröffentlicht: 08 Apr 2010
Seitenbereich: 75 - 84

Zusammenfassung

Schlüsselwörter

  • mid-field ponds
  • water retention
  • water quality
  • meteorological conditions
Uneingeschränkter Zugang

Changes in the structure of phytoplankton in the lowest part of the Cybina River and the Maltański Reservoir

Online veröffentlicht: 08 Apr 2010
Seitenbereich: 85 - 94

Zusammenfassung

Abstract

The floristic composition, abundance, and biomass of phytoplankton in the Cybina River and the Maltański Reservoir were examined from April to October 2005. The analysis of the phytoplankton in the samples revealed statistically significant differences in both composition and abundance. The maximum abundance (39.2 × 103 ind. cm-3) and biomass (56.8 μg cm-3) of phytoplankton was noted in July 2005 at the outlet from the Maltański Reservoir. The lowest phytoplankton density was most often noted at the site located at the inlet of the Cybina River into the Maltański Reservoir. The quantitative and qualitative compositions of the phytoplankton varied at different sites. The highest taxonomical similarity was noted among the samples collected in the reservoir and at the outflow from it.

Schlüsselwörter

  • phytoplankton
  • taxonomic composition
  • abundance
  • biomass
Uneingeschränkter Zugang

The in situ influence of Ceratophyllum demersum on a phytoplankton assemblage

Online veröffentlicht: 08 Apr 2010
Seitenbereich: 95 - 101

Zusammenfassung

Schlüsselwörter

  • allelopathy
  • phytoplankton
  • Cyanoprokaryota
Uneingeschränkter Zugang

Factors which shape the load of water ecosystems with mineral nitrogen runoffs in rural areas

Online veröffentlicht: 08 Apr 2010
Seitenbereich: 103 - 110

Zusammenfassung

Abstract

The present study of factors which affect the load of water ecosystems with mineral nitrogen compounds (N-NH4 and N-NO3) was conducted in the Olsztyn Lake District and covered the time period from 1992 to 1999. Three capture basins were investigated: agricultural drained with a drain network, agricultural drained with a drainage ditch, and agricultural-forested drained with scattered drains and ditches. It was found that the concentration and load of mineral forms of nitrogen in waters running off from rural areas were closely dependent on meteorological conditions, the kind of artificial drainage system in use, and the type of land use in the catchment area. In waters carried away through the drainage systems, average annual concentrations of N-NH4 ranged from 0.16 mg dm-3 (the agricultural capture basin drained with ditches) to 1.09 mg dm-3 (the agricultural catchment drained with a network of drains); the amounts of N-NO3 ranged from 0.29 mg dm-3 (the agricultural-forested catchment) to 8.06 mg dm-3 (the agricultural catchment drained with a network of drains). It was also observed that a larger share of arable lands in the land use structure in a given catchment caused an increase in the load of N-NO3 determined in drained waters. In addition, it was confirmed that the amounts of mineral nitrogen carried away with drained waters annually varied from 12.78 kg N (6.7 kg N on average) per 1 ha of an agriculturally used catchment, of which N-NO3 was a dominant form (12.23 kg).

Schlüsselwörter

  • nitrogen
  • water
  • artificial drainage system
  • rural areas
Uneingeschränkter Zugang

The biodiversity of psammon rotifers in Włocławek Reservoir

Online veröffentlicht: 08 Apr 2010
Seitenbereich: 111 - 117

Zusammenfassung

Abstract

In total 47 rotifer taxa were found in the psammon of Włocławek Reservoir; 36 at the site in Dobiegniewo and 38 at Dobrzyń. Five species were classified as psammobionts, 14 as psammophiles, and the remaining ones as psammoxens. Psammobionts and psammophiles were observed mostly in the psammon at Dobiegniewo.

The highest density of psammon rotifers was noted in the euarenal zone of the flooded part of the reservoir. However, the highest density in the area near the swift current was noted in the hygroarenal zone. While the flooded part of the reservoir had four dominant species of rotifer: Lecane closterocerca, L. scutata, Lepadella patella and Cephalodella catellina, the area near the swift current had only two: Cephalodella catellina and Brachionus quadridentatus.

The most favorable conditions for the development of psammon rotifers was in the flooded area of the reservoir. In comparison with other dam-reservoirs in Poland, the community of these rotifer types in the Włocławek Reservoir was characterized by considerable species richness.

Schlüsselwörter

  • psammon rotifers
  • dam reservoir
  • different sites
Uneingeschränkter Zugang

Using macrophytes as trophic state indicators in upland river waters: a case study of the Czarna Maleniecka River

Online veröffentlicht: 08 Apr 2010
Seitenbereich: 119 - 126

Zusammenfassung

Abstract

The study was conducted on the upper reach of the Czarna Maleniecka River from Furmanów to the ford at Piekło. Nine sampling sites were selected along this 20-km section. Detailed studies of flora and the physicochemical water parameters were performed in the 2004-2006 period. Data on macrophytes were collected with the Mean Trophic Rank (MTR) method. The results of physicochemical measurements were analyzed in reference to the water quality classification of the Polish Ministry of the Environment. Based on the results of these studies, the authors recommend adding two species, Utricularia intermedia and Glyceria fluitans, to the list of bioindicators.

Schlüsselwörter

  • macrophytes
  • bioindication
  • river water quality
  • upland river
  • MTR
Uneingeschränkter Zugang

Relationship between plankton assemblages and habitat characteristics of stands of Typha angustifolia and Chara hispida in Lake Wielkowiejskie

Online veröffentlicht: 08 Apr 2010
Seitenbereich: 127 - 135

Zusammenfassung

Abstract

The results of investigations performed in Lake Wielkowiejskie showed the influence of macrophyte architecture, understood as plant density, on the structure of plankton communities as well as the habitat preferences of particular species in both seasonal and spatial aspects.

Schlüsselwörter

  • phytoplankton
  • zooplankton
  • macrophyte-dominated lake
  • habitat preferences
Uneingeschränkter Zugang

Auto- and heterotrophic picoplankton in a lowland river (Warta River, Poland)

Online veröffentlicht: 08 Apr 2010
Seitenbereich: 137 - 146

Zusammenfassung

Abstract

The structure of plankton in a lowland river was studied with a particular focus on autotrophic as well as heterotrophic picoplankton cells. Water samples were collected in the middle, meridional section of the Warta River in 2005. Heterotrophic picoplankton (HPP) were represented by bacteria varying in size and form, but mainly by cocci and rods. HPP abundance ranged from 3.5 × 106 to 9.5 × 106 cells ml-1. Autotrophic picoplankton (APP) densities were considerably lower and ranged from 1.2 × 103 to 92 × 103 cells ml-1. They were represented by prokaryotes (picocyanobacteria) and eukaryotes (small chlorophytes). Both components occurred together but eukaryotic APP usually prevailed in terms of biomass. In terms of biomass, APP seemed to play a minor role in this ecosystem in comparison with heterotrophic picoplankton.

Schlüsselwörter

  • bacteria
  • picocyanobacteria
  • picoeukaryotes
  • Warta River
Uneingeschränkter Zugang

Analysis of environmental conditions and macro-cations composition (Ca, Mg, Na, K, Sr) in the operculum bones of estuarine fishes in the Pomeranian Bay (southern Baltic Sea)

Online veröffentlicht: 08 Apr 2010
Seitenbereich: 147 - 159

Zusammenfassung

Abstract

The aim of this study was to show the influence of environmental conditions on the ionic composition of fish bones. The analysis concerned the ionic structural composition of the operculum in fish species with different abiotic habitat preferences. Three species of fish were examined: cod, Gadus morhua L., 1758; sea trout, Salmo trutta morpha trutta L., 1758 and perch, Perca fluviatilis L., 1758. Results from hydrochemical research on salinity in the Pomeranian Bay (Southern Baltic) were also utilized. Using the determined ratios (Ca:Mg, Na:Mg, Sr:Ca and Na:Ca in the operculum and Ca:Mg, Na:Mg and Na:Ca in the waters of the Pomeranian Bay), typical correlations were determined for the analyzed habitat.

Macrocation structure in the operculum bones for each species were found to be as follows:

- cod: Ca - 32.3%, Mg - 29.8%, Na - 1.4%, K - 0.8%, Sr - 2.1%;

- sea trout: Ca - 22.8%, Mg - 13.5%, Na - 0.8%, K - 0.2%, Sr - 1.7%;

- perch, Ca - 37.9%, Mg - 15.1%, Na - 2.4%, K - 0.7%, Sr - 1.6%.

Schlüsselwörter

  • estuarine fishes
  • macro-cations in operculum
  • the Pomeranian Bay
Uneingeschränkter Zugang

Diversity of freshwater red algae in Europe

Online veröffentlicht: 08 Apr 2010
Seitenbereich: 161 - 169

Zusammenfassung

Abstract

Of the total number of freshwater red algae (ca. 180 taxa), one third are found in Europe (ca. 60 taxa). Over one third (24 taxa) of European taxa have been found at only one single location or at very few locations. The majority of taxa live in running waters, but some occur in lakes, on wet ground, in hot springs or in garden ponds. Diversity in the Nordic countries of Sweden and Finland seems to be somewhat higher (27 and 28 taxa, respectively) than in the central and southern parts of Europe (e.g. Austria 23, Belgium 22, Hungary 9, Poland 22, Slovakia 15, Switzerland 12 and Spain 20 taxa).

Schlüsselwörter

  • Rhodophyceae
  • freshwater red algae
  • Europe
  • diversity

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