Journal of Environmental BiologypISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP |
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Abstract - Issue Sep Supplement 2009, 30 (5) BackSeasonal and vertical
distributions of porewater phosphorus and iron concentrations in a macrophyte-dominated
eutrophic lake (Received:
Abstract: In this study,
variations in total dissolved phosphorus (TDP), soluble reactive phosphorus
(SRP) and total iron (TFe) concentrations and pH
values in the littoral sediment porewater of macrophyte-dominated eutrophic Mogan Lake (Turkey), were determined depth wise? (0-20 cm, on a basis of 5 cm depths) over a
period of eleven months. Additionally, water temperature, dissolved oxygen, redox potential, TDP, SRP and TFe
levels in the overlying water were measured. Especially in the spring and
summer months constituting a large portion of the research period, seasonal
variation of SRP at depths between 0-5 cm and 15-20 cm were not found to be
statistically significant (p>0.01). However, in the fall and winter months,
surface sediment (0-5 cm) SRP values were elevated in comparison with deeper
sediment depths. As for TFe values, no clear seasonal
variation was evident at different depths. Due to the fact that TFe concentrations in the overlying water (101.25-511.67 mg.m-3) were lower than iron concentrations in
the porewater? (104.00-783.00 mg.m-3), positive phosphorus release remained at
low levels. In this eutrophic lake, in which action
is continuing to reduce the external phosphorus load, monitoring SRP variations
in the overlying water and porewater would be
beneficial. Key words: Phosphorus, Iron, Porewater, Littoral
sediment, Overlying water ??????? PDF of full length paper
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