Wyniki wyszukiwania

1

Assimilation of aboveground litter carbon versus soil carbon by Collembola and Lumbricidae in spruce forest: a litter replacement experiment

100%

Semenina E. E., Tiunov A. V.

Polish Journal of Ecology

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2020

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tom 68

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nr 2

2

Optimal regulation of energy budgets in rodents

100%

Kryazhimskii F.

Polish Ecological Studies

|

1994

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tom 20

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nr 3-4

3

Size of duckweed Lemna minor: an energy optimization model

84%

Uchmanski J., Czapczak A., Hawro V.

Acta Scientiarum Polonorum. Biologia

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2009

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tom 09

|

nr 1-4

4

A meteorological study of the ablation process on Hans Glacier, SW Spitsbergen

84%

Migala K., Piwowar B. A., Puczko D.

Polish Polar Research

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2006

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tom 27

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nr 3

243-258

The ablation of glaciers is an important factor in energy exchange between the atmosphere and land ice masses. The dynamics of ablation closely reflects climate changes and is important for the estimation of the outflow of meltwater, which, having penetrated a glacier to bedrock, stimulates its velocity by increasing basal sliding. More detailed studies using automatic weather stations (AWS) and the calculation of the energy budget are rarely conducted on small glaciers. The mass balance of the Hans Glacier has been monitored since 1989. Its intensified monitoring using AWS began in 2003. The results show that ablation depends more evidently on the daily mean and maximum air temperature and wind speed than on total and net radiation. Ablation, both that controlled by sonic height ranger and that measured manually on stakes, was compared with the values calculated on the basis of energy flux formulas applied by Oerlemans (2000). The statistical results allowed us to construct empirical equations, which in turn enabled us to compute the course and total ablation during the summer seasons. It can be described on the basis of two primary meteorological elements (air temperature and wind speed), as recorded in the station representing the regional area (Hornsund) or measured in situ on the glacier. Standard measurements of ablation from the years 1989-2004 were used to verify empirical model. The computed mean value of summer ablation for 1989-2004 was calculated at 1.35 m, differing from real measurements by only 10% (with SD = 0.18). The results obtained illustrate that an empirical equation can be applied in time series analyses. A regional ablation model enables us to investigate the mass-balance history of glaciers on the basis of meteorological data.

5

Effect of acidification on feedind in guppy fish [Lebistes reticulatus vel Poecilia reticulata]

84%

Urban-Jezierska E.

Polish Journal of Ecology

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2002

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tom 50

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nr 1

The response of four categories of the fish Lebistes reticulatus (young fishes, females with embryos and without embryos, and males) to 24-h exposure in stream waters that differed in pH: water I, pH = 6.01-6.25, water II, pH = 4.36-4.55, and water III, pH = 4.11-4.39 was examined. Tap water - water 0 (pH = 7.54-8.26) was considered as control. In strongly acidified water, the metabolism of L. reticulatus was modified. Mainly proteins were digested, and lipids were cumulated in faeces, increasing their energy content by 4-36% per mg dry weight as compared with the energy content of food. The excretion of ammonium considerably increased, implying that the oxidisation of proteins increased in the process of respiration. Oxygen consumption increased with acidification only in young fishes.

6

Energy budgets in the populations of Crangon crangon L. [Crustacea] and Cardium glaucum [Poiret] [Mollusca] in the Gulf of Gdansk

67%

Szaniawska A.

Oceanologia

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1992

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tom 32

7

Energy budget in early stages of smelt Osmerus eperlanus [L.]

67%

Maciejewska K., Opalinski K. W., Margonski P.

Bulletin of the Sea Fisheries Institute

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2001

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nr 2

Ograniczanie wyników

2 Polish Journal of Ecology

1 Acta Scientiarum Polonorum. Biologia

1 Bulletin of the Sea Fisheries Institute

1 Oceanologia

1 Polish Ecological Studies

1 Polish Polar Research

1 Czapczak A.

1 Hawro V.

1 Kryazhimskii F.

1 Maciejewska K.

1 Margonski P.

1 Migala K.

1 Opalinski K. W.

1 Piwowar B. A.

1 Puczko D.

1 Semenina E. E.

1 Szaniawska A.

1 Tiunov A. V.

1 Uchmanski J.

1 Urban-Jezierska E.

1 2020

1 2009

1 2006

1 2002

1 2001

1 1994