Sedimentary profiles of Fe, Mn, V, Cr, As and Mo as indicators of benthic redox conditions in Baldeggersee

Autor:	H. Christoph Moor, Bernhard Wehrli, Tobias Schaller
Rok vydání:	1997
Předmět:	Ecology Vanadium chemistry.chemical_element Mineralogy Sediment Manganese Aquatic Science Oxygen Anoxic waters Redox chemistry Benthic zone Environmental chemistry Hypolimnion Ecology Evolution Behavior and Systematics Geology Water Science and Technology
Zdroj:	Aquatic Sciences. 59:345-361
ISSN:	1420-9055 1015-1621
DOI:	10.1007/bf02522363
Popis:	Concentration profiles of Mg, K, La, Fe, Mn, V, Cr, As and Mo were determined in samples from a freeze core taken at the deepest site of Baldeggersee in 1993. The special coring technique allowed an exact dating of the sediment samples and an annual resolution of the profiles. Long term changes in benthic redox conditions produce diagnostic trends in several metal profiles. Fe, As and Mn enrichments trace the onset of anoxia at the deepest site of the lake. High values of Mo concentrations and Cr/V ratios indicate periods of stable anoxic conditions in a meromictic hypolimnion. A comparison of oxygen time series with metal profiles between 1950 and 1990 indicates that Mn reacts sensitively to large seasonal variations of deep-water oxygen concentrations.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6c9ba68a6ba8898c876e149e45bd0da1 https://doi.org/10.1007/bf02522363 Zobrazit plný text záznamu Full text from SpringerLink