Wyniki wyszukiwania

1

Microhabitat preference of European bitterling, Rhodeus sericeus in the Drzewiczka River [Pilica Basin]

100%

Przybylski M., Zieba G.

Polskie Archiwum Hydrobiologii

|

2000

|

tom 47

|

nr 1

2

Stream habitat or water quality - what influences stronger fish and macrozoobenthos biodiversity?

84%

Adamek Z., Jurajda P.

International Journal of Ecohydrology and Hydrobiology

|

2001

|

tom 01

|

nr 3

The data obtained within the framework of a survey of macrozoobenthos and fish communities in Czech streams of the Danube and Elbe river basins were evaluated with respect to the relation between biodiversity and level of water (organic pollution) and/or physical habitat quality (heterogeneity, substrate, riparian vegetation, canalisation). The diversity of macrozoobenthos species was the highest at the water quality corresponding to betamesosaprobity (saprobiological index SI ≈ 2,0) and oligosaprobity (SI ≈ 1,0) in lowland and highland streams respectively, declining both towards lower and higher saprobic (≈ trophic) levels. The response of macrozoobenthos to habitat quality deterioration was less considerable with rising degradation in highland streams than in lowland ones. Fish assemblage followed a similar trend, namely: the highest biodiversity in betamezosaprobity in both lowland and highland streams. In comparison with the assemblage of benthic macroinvertebrates, fish community response was more pronounced both regarding water quality and habitat degradation. Both fish and macrozoobenthos biodiversity were influenced more by water quality than by physical habitat degradation.

3

Stream habitats, benthic macroinvertebrates, lotic fish and their relationships: a multi-scale approach

67%

Fleituch T., Amirowicz A.

Polish Journal of Ecology

|

2005

|

tom 53

|

nr 1

A natural reach of montane stream (length 96 m and 7 m width) was grided into 150 cells (2 × 2 m). Density and biomass of fish (Salmo trutta L. and Cottus poecilopus Heckel) were estimated at each cell, as well as stream depth, current velocity, Froude number, bed granulation and its roughness were measured, and benthic samples from exposed bricks were collected from mid August to early October. The analysis of spatial patterns of seven variables (five abiotic and two biotic ones) and fish occurrence from the period of highest organisms’ abundance confirmed that two fish species were separated within the stream space and sculpin showed close association to benthic prey. The PCA pointed to the highest loadings of abiotic habitat variables (64% of the total variance) indicating importance of hydraulics (stream velocity and Froude number) and bed characteristics (stream depth and bed roughness) in distribution of fish communities in pristine low order streams.

Ograniczanie wyników

1 International Journal of Ecohydrology and Hydrobiology

1 Polish Journal of Ecology

1 Polskie Archiwum Hydrobiologii

1 Adamek Z.

1 Amirowicz A.

1 Fleituch T.

1 Jurajda P.

1 Przybylski M.

1 Zieba G.

1 2005

1 2001

1 2000

Microhabitat preference of European bitterling, Rhodeus sericeus in the Drzewiczka River [Pilica Basin]

Stream habitat or water quality - what influences stronger fish and macrozoobenthos biodiversity?

Stream habitats, benthic macroinvertebrates, lotic fish and their relationships: a multi-scale approach