Wyniki wyszukiwania

1

The velocity-reversal hypothesis-implications for a mountainous stream bed morphology

100%

Radecki-Pawlik A.

Electronic Journal of Polish Agricultural Universities. Series Environmental Development

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2002

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tom 05

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nr 2

This paper presents the results of a study of reversal hypothesis phenomena observed within riffles and pool sequences on a 1.1 km long reach of the Skawica-Jalowiecki Stream. The Skawica-Jalowiecki is a flashy mountain stream with an alluvial bed that transports sediment during frequent floods. The study reach is situated just below the border of the Babia-Gora National Park in Polish Carpathians, which provides a good, undisturbed research site. It was found that Q=4.27 m3s-1, Q=2.43 m3s-1 velocities and shear stresses in pools were highest over riffles during spring floods. It was also observed that unit stream power above the pools was bigger than that found in the riffles.

2

Hydrozetes species (Acari, Oribatida) at bog ponds and pools in the Tatra National Park and Orawa–Nowy Targ Basin (Kotlina Orawsko-Nowotarska) in Southern Poland

84%

Mistrzak M., Seniczak A., Seniczak S.

Biological Letters

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2011

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tom 48

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nr 2

3

Effect of starvation on the free amino acids pool in an organophosphorus - insecticide - resistant and a susceptible strain of Tribolium castaneum

84%

Saleem M. A., Shakoori A. R.

Folia Biologica

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1995

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tom 43

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nr 3-4

4

Feeding pattern of brown trout [ Salmo trutta L.] from the river earn [ Scotland ], in relation to invertebrate drift

84%

Frankiewicz P., Zalewski M., Thorpe J. E.

Polskie Archiwum Hydrobiologii

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1993

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tom 40

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nr 1

5

Moss mites (Acari, Oribatida) at the edges of bog lakes and pools in Brodnica Lakeland and Orawa–Nowy-Targ Basin (Poland)

67%

Seniczak A., Seniczak S., Mistrzak M., Nowicka A., Krasicka-Korczynska E.

Biological Letters

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2013

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tom 50

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nr 2

6

Water blooms - what causes them?

67%

Eloranta P.

Oceanological Studies

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1998

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tom 27

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nr 1

7

Adaptations of pupae of Chironomidae [Insecta: Diptera] to oxygen-poor habitats

67%

Marziali L., Lencioni V., Rossaro B.

Polish Journal of Ecology

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2006

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tom 54

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nr 4

Morphological, behavioural and physiological adaptations of chironomid pupae to oxygen-poor habitats, such as the profundal zone of lakes, are discussed. Lentic and oxy-regulator species possess developed respiratory organs (thoracic horns) and an extensive anal fringe to perform respiratory movements, whereas in rheophilic and oxy-conformer species these structures are reduced or absent. This led to the hypothesis that the number of thoracic horn branches, the number of anal macrosetae and the body size could consititute a measure of a species’ oxygen requirements. These characters were analyzed in 12 species groups collected in 39 Italian lakes. Numbers were correlated to the optimum value of oxygen level, total phosphorus concentration and transparency calculated for each taxon. Taxa with plumose thoracic horns, extensive anal fringe and large body size (Chironomus) inhabited habitats poorer in oxygen than those inhabited by taxa with less extensive respiratory surface and fringe and small body size (Paratendipes, Polypedilum, Microtendipes). Stictochironomus was less tolerant than expected. Further studies are needed into the physiological adaptations of chironomid pupae.

8

Could foraminiferal zooxanthellae be derived from environmental pools contributed to by different coelenterate hosts?

67%

Lee J. J., Wray C. G., Lawrence C.

Acta Protozoologica

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1995

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tom 34

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nr 2

9

The parasitic Hymenoptera in a beech forest on limestone I: species composition, species turnover, abundance and biomass

59%

Ulrich W.

Polish Journal of Ecology

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1998

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tom 46

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nr 3

Ograniczanie wyników

The velocity-reversal hypothesis-implications for a mountainous stream bed morphology

Hydrozetes species (Acari, Oribatida) at bog ponds and pools in the Tatra National Park and Orawa–Nowy Targ Basin (Kotlina Orawsko-Nowotarska) in Southern Poland

Effect of starvation on the free amino acids pool in an organophosphorus - insecticide - resistant and a susceptible strain of Tribolium castaneum

Feeding pattern of brown trout [ Salmo trutta L.] from the river earn [ Scotland ], in relation to invertebrate drift

Moss mites (Acari, Oribatida) at the edges of bog lakes and pools in Brodnica Lakeland and Orawa–Nowy-Targ Basin (Poland)

Water blooms - what causes them?

Adaptations of pupae of Chironomidae [Insecta: Diptera] to oxygen-poor habitats

Could foraminiferal zooxanthellae be derived from environmental pools contributed to by different coelenterate hosts?

The parasitic Hymenoptera in a beech forest on limestone I: species composition, species turnover, abundance and biomass