Alewell, C; Novák, M: Spotting zones of dissimilatory sulfate reduction in a forested catchment; The 34S - 35S approach, Environmental Pollution, 112, 369-377 (2001)
The localization of sulfate reducing sites in forested catchments is of major importance, because dissimilatory sulfate reduction can be a considerable sink for deposited sulfate. To localize dissimilatory sulfate reduction sites in a forested catchment (northeastern Bavaria, Germany), three sites within the catchment (upland site, intermittent seep, fen) were investigated for delta S-34 depth profiles of soil sulfur and potential sulfate reduction rates were measured with S-35 radiolabeling. Stable sulfur isotopes indicate that aerobic metabolism is the dominant process on the upland site and the intermittent seep (delta S-34 Of soil sulfur between + 1.6 and + 9.0 parts per thousand) and dissimilatory reduction is not a significant sink for sulfate. However, results of the S-35 radiolabeling indicated for the upland site that the soil has potentially high sulfate reduction rates under laboratory conditions. Soil sulfur of the fen was markedly depleted in S-34 (delta S-34 between -6 and +2.6 parts per thousand). Both, S-34 and S-35 data indicated that dissimilatory sulfate reduction is an ongoing process on this site. The S-34 and S-35 approaches are complementary. While measurements using S-35 can show momentary potential for dissimilatory bacterial sulfate reduction, delta S-34 data reflect long-term predominance of either assimilatory or dissimilatory S metabolism at a particular site.
Aktuelle Termine

Do. 06.04.2023
Human-Wildlife Conflicts (HWC) in Southern Africa
Mi. 01.03.2023 aktuell
Main FlussFilmFest 2023
Ökologisch-Botanischer Garten:
So. 02.04.2023
Führung | Rosen-Seide & Soja-Kaschmir: Textilien von morgen
So. 16.04.2023
Führung | Den ÖBG kennenlernen: Allgemeine Gartenführung
So. 16.04.2023
Ausstellungseröffnung | Die dünne Haut der Erde - Unsere Böden.
Wetter Versuchsflächen
Luftdruck (356m): 960.2 hPa
Lufttemperatur: 5.3 °C
Niederschlag: 1.3 mm/24h
Sonnenschein: <1 h/d
Wind (Höhe 17m): 6.1 km/h
Wind (Max.): 12.6 km/h
Windrichtung: W

Globalstrahlung: 0 W/m²
Lufttemperatur: 1.9 °C
Niederschlag: 1.4 mm/24h
Wind (Höhe 32m): 10.5 km/h

Diese Webseite verwendet Cookies. weitere Informationen