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1

Seasonal changes of itersititial community respiration in a Baltic sandy beach

Urban-Malinga B., Opaliński K. W.

Oceanological Studies

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2002

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Vol. 31, No. 3-4

57-70

EN

Interstitial community respiration in a Baltic sandy beach on the Gulf of Gdańsk was investigated in terms of sediment oxygen consumption over a seasonal cycle. The study was carried out at four locations on the beach slope (littoral, waterline, splashzone and middle beach). Oxygen uptake changes over time were not statistically significant and no correlation was found between sediment respiration and water temperature. It seems that food supply to the sandy beach system is the predominant factor determining the interstitial community metabolism. The lowest values of oxygen consumption (9-33 cm3 O2 m-2 h-1) were noted in the middle beach station; the highest results (up to 212 cm3 O2 m-2 h-1) were related to the littoral site. Organic matter concentration in the sediment ranged between 0.09 and 0.9% dwt.

2

Interstitial community oxygen consumption in a Baltic sandy beach: horizontal zonation

Urban-Malinga B., Opaliński K. W.

Oceanologia

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2001

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No. 43 (4)

455-468

EN

The oxygen consumption of a sandy beach interstitial community was determined on four occasions (January, May, August, October) on the Gulf of Gdansk (southern Baltic Sea). The study was carried out at four locations on the beach slope (littoral, waterline, splash zone and middle beach). Oxygen consumption varied from 158-159 cm3 O2 m-2 h-1 at the underwater site and waterline to 20-36 cm3 O2 m-2 h-1 in the middle beach. According to these data, interstitial organisms are able to utilize from 206 to 1641 mg of organic carbon per square metre per day. In general, metabolic activity decreased gradually from the waterline towards the middle beach, and a significant correlation was found between oxygen consumption and sediment water content. Changes in oxygen consumption on the beach slope were statistically significant.

3

Vertical zonation of the total, biotic and abiotic oxygen consumption on a Baltic sandy beach

Urban-Malinga B., Opaliński K. W.

Oceanological Studies

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1999

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Vol. 28, No. 3-4

85-96

EN

The oxygen consumption of a sandy beach on the Gulf of Gdansk (southern Baltic Sea) was determined. The study was carried out in three sediment layers (0-1, 1-6, 6-11cm) at four localities on the beach profile. Total oxygen consumption lay between 0.59 and 4.33 mm3 O2 cm-3 h-1. A significant linear correlation was found between sediment depth and total oxygen consumption in the littoral zone (r = 0.85) and in the splash zone (r = -0.71). The highest biotic oxidation was recorded in the upper sediment layers in the splash zone (0-1 cm: 1.57 mm3 O2 cm-3 h-1) and at the waterline (1-6 cm: 1.87 mm3 O2 cm-3 h-1). Meiofaunal respiration constituted 0.1- 3.0% of the biotic oxygen consumption. Abiotic oxygen consumption ranged between 0.07 and 3.43 mm3 O2 cm-3 h-1 and was the dominant component of total oxidation in deeper layers.