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1

Seasonal changes of itersititial community respiration in a Baltic sandy beach

100%
Urban-Malinga B., Opalinski K. W.
Oceanological Studies
|
2002
|
vol. 31
|
issue 3-4
57-70
EN
Interstitial community respiration in a Baltic sandy beach on the Gulf of Gda?sk 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

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

100%
Urban-Malinga B., Opalinski K. W.
Oceanological Studies
|
1999
|
vol. 28
|
issue 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.
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