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Central and Eastern European Marine Repository (CEEMaR) >
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Bulletin of the Sea Fisheries Institute >
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http://10.0.0.195:8080/dspace/handle/11099/469
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| Title: | Production and mineralization of organic matter in the Pomeranian Bay. |
| Authors: | Witek, Zbigniew
Drgas, Aleksander
Ameryk, Anetta
Ochocki, Stanisław |
| ASFA Terms: | Biological production
Primary production
Oceanography
Bacteria
Respiration |
| Issue Date: | 2001 |
| Publisher: | Sea Fisheries Institute |
| Citation: | Bulletin of the Sea Fisheries Institute, Gdynia, 3. p. 49-69 |
| Abstract: | The aim of this work was to estimate the influence of the Oder River on the biological
production of the Pomeranian Bay and to identify the role of the local community in organic matter
mineralization. The first problem was examined through the comparison of local nutrient resources
and local primary production with nutrient loads and organic matter loads reaching the Pomeranian
Bay from outside. The latter problem, concerning organic matter decomposition in the bay,
was examined on the basis of measurements of oxygen consumption conducted in various seasons
(March 1996, July 1996, May 1997 and October 1997).
It was calculated that 67% of nitrogen in the Pomeranian Bay came from the Oder River, 12%
from the atmosphere and 21% was of marine origin. In the case of phosphorus, the marine and
land-based shares were approximately even. As opposed to the open parts of the Baltic Proper,
where nitrogen is the nutrient limiting primary production, phosphorus is a potentially limiting
factor in the Pomeranian Bay. The annual organic matter load from the Oder River and atmosphere
exceeded the annual new primary production by a factor of 2-3, but the amount of the biologically
decomposable organic matter from these sources was close to the value of new primary
production. Full decomposition of the degradable allochthonous organic material depends, however,
on adequately high temperature and requires a longer period of time. The utilization of this
material for bacterial production, and, thus, its inclusion into the trophic cycle was rather small and
was concentrated around the river mouth area. Despite this the total community (dark) respiration
appears to exceed (14C) primary production by 30-50% throughout most of the vegetation period,
thus suggesting an important contribution of the allochthonous organic material in the community
energy budget. However, methodological uncertainties involved in primary production and community
respiration measurements make this conclusion only hypothetical. |
| URI: | http://www.ceemar.org/dspace/handle/11099/469 |
| Related document: | http://www.mir.gdynia.pl/pliki/osrodek/biuletyn/biulet3-01.pdf |
| Appears in Collections: | Bulletin of the Sea Fisheries Institute
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