Longitudinal Gradients in the Chemical and Microbial Composition of the Bottom Sediment in a Channel Reservoir (Saidenbach R., Saxony)
作者:
Dietrich Uhlmann,
Michael Hupfer,
Lothar Paul,
期刊:
Internationale Revue der gesamten Hydrobiologie und Hydrographie
(WILEY Available online 1995)
卷期:
Volume 80,
issue 1
页码: 15-25
ISSN:0020-9309
年代: 1995
DOI:10.1002/iroh.19950800103
出版商: Akademie Verlag, Berlin
关键词: drinking water reservoirs;sediment;phosphorus elimination;iron
数据来源: WILEY
摘要:
AbstractSaidenbach Reservoir is situated in the Erzgebirge Hills, Saxony, in a catchment with agriculture as the principal use and a high sensitivity to soil erosion. The high elimination of total phosphorus (ca. 70%) mainly results from a) the sedimentation flux of planktonic diatoms and b) the adsorption to and sedimentation with mineral particles rich in iron. At stations with a high sulfide concentration in the 0–5 cm sediment layer (about 0.2%), the P content was likewise high (about 0.3%), probably due to the high iron concentration (more than 2.5% of dry weight). A fractionation procedure showed that the major part of the sediment phosphorus was not sensitive to reductants (dithionite) but has been found only in the following extraction step (NaOH extract
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