Wyniki wyszukiwania

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Leeches [Hirudinea] of the Liwiec River [South Podlasie and Middle Mazovia Lowlands, Poland]

100%

Korycinska M.

Fragmenta Faunistica

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2002

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tom 45

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nr 1

2

Taxanomic composition of macroinvertebrates in the Liwiec River and its tributaries [cetral and eastern Poland] on the basis of chosen physical and chemical parameters of water and season

84%

Krolak E., Korycinska M.

Polish Journal of Environmental Studies

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2008

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tom 17

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nr 1

39-50

The taxonomic composition of macroinvertebrates in the Liwiec River and its tributaries situated in central and eastern Poland was studied during three seasons (spring, summer and autumn). Simultaneously, physical and chemical parameters of water were measured. Water parameters were different in each study period. Macroinvertebrates samples collected in summer and autumn were much more diversified than the samples collected in spring. In the spring samples a greater EPT diversity was observed, while in the samples collected in autumn Odonata, Coleoptera and Heteroptera were more diversified. The values of the BMWP-PL index were slightly higher for the summer and autumn samples than for the spring ones. Correlation between the concentration of oxygen in water and the number of individuals of Plecoptera and Trichoptera larvae was noted. The negative correlation between the values of BOD₅, the concentration of nitrate ions and conductivity, and the number of macroinvertebrate families was observed. A negative correlation also was noted between nitrate and phosphate ion concentrations and the number of individual insect larvae.

3

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Heavy metals and phosphorus in snails of the River Liwiec and its tributaries

84%

Krolak E.

Folia Malacologica

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1999

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tom 07

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nr 4

4

Diversity of aquatic molluscs in a heterogenous section of a medium-sized lowland river-floodplain system: an example of intermediate disturbance hypothesis

84%

Jurkiewicz-Karnkowska E.

Polish Journal of Ecology

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2015

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tom 63

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nr 4

Natural river-floodplain systems are heterogenous mosaics of lotic and lentic habitats subjected to dynamic temporal changes connected with hydrological regime, which promote high biological diversity. Mollusc assemblages of three habitat types within 10 km section of the lower course of the Liwiec River (East Poland) — the main river channel (MC), the secondary channel (SC) and remnants of the former river channel (FC), were compared to find if they were structured by heterogeneity resulting from hydrological connectivity and disturbance intensity related to it. The influence of selected qualitative environmental variables was also analysed. The investigations were carried out at 19 sites during late spring and late summer in the years 2012–2014, molluscs were sampled from approximately 1 m² of the bottom with a hand net, and from macrophytes with a frame. Rich aquatic malacofauna (36 species including 22 gastropods and 14 bivalves) was found within the study area including three species of special interest: Anisus vorticulus (Troschel), Unio crassus Phillipsson and Anodonta cygnea (L.). Bivalves Sphaerium corneum (L.) and Pisidium spp dominated within MC, in SC a few common and ubiquitous species (mainly snails) prevailed, pulmonate snails and some small bivalves of the genus Pisidium were the most numerous molluscs within FC. Principal Component Analysis revealed that current velocity, channel width, bottom sediments and macrophyte abundance were important environmental factors structuring mollusc assemblages. Considerable variation in species composition (β diversity), especially between the main river channel and two other habitat types (β²) was found. The highest values of mean species richness, Shannon true diversity and Shannon index found in the secondary channel were in accordance with intermediate disturbance hypothesis.

5

The use of various biotic indices for evaluation of water quality in the lowland rivers of Poland [exemplified by the Liwiec River]

84%

Korycinska M., Krolak E.

Polish Journal of Environmental Studies

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2006

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tom 15

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nr 3

Water quality of the liwiec River (the longest tributary of the Bug River, the South Podlasie Lowland, and the Central Mazovia Lowland) was evaluated in 1998-2000 and 2002 using selected physical and chemical parameters and macroinvertebrate analysis. Classification of water quality was done on the basis of physical and chemical parameters. Taxonomic composition of invertebrate macrofauna was used for calculation of the following biological indices: Belgian Biological Index (BBI), British BMWP/OQR Index, and modified for Polish rivers, Margaleff's index of biological diversity. The values of physical and chemical parameters showed that water of the Liwiec River belongs to the 2nd and 3rd class of quality (in the five degree scale). The values of BBI and BMWP/OQR indices revealed that the water was moderately polluted. According to the biodiversity index, the Liwiec River was classified as the 1st quality class. Correlation between chemical parameters and BBI and BMWP/OQR values shows that these indices may be used for evaluation of water quality in Polish lowland rivers (like Liwiec). However, in the case of the biodiversity index, the ranges for various water quality classes should be modified.

6

The use of BMWP-PL index for assessment of water quality in the lowland Liwiec River and its longest tributaries [Central-Eastern Poland]

84%

Korycinska M., Krolak E.

Archiwum Ochrony Środowiska

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2007

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tom 33

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nr 3

Ograniczanie wyników

2 Polish Journal of Environmental Studies

1 Archiwum Ochrony Środowiska

1 Folia Malacologica

1 Fragmenta Faunistica

1 Polish Journal of Ecology

4 Korycinska M.

4 Krolak E.

1 Jurkiewicz-Karnkowska E.

1 2015

1 2008

1 2007

1 2006