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Biogeochemical cycling of manganese in Oneida Lake, New York: whole lake studies of manganeseOneida Lake, New York is a eutrophic freshwater lake known for its abundant manganese nodules and a dynamic manganese cycle. Temporal and spatial distribution of soluble and particulate manganese in the water column of the lake were analyzed over a 3-year period and correlated with other variables such as oxygen, pH, and temperature. Only data from 1988 are shown. Manganese is removed from the water column in the spring via conversion to particulate form and deposited in the bottom sediments. This removal is due to biological factors, as the lake Eh/pH conditions alone can not account for the oxidation of the soluble manganese Mn(II). During the summer months the manganese from microbial reduction moves from the sediments to the water column. In periods of stratification the soluble Mn(II) builds up to concentrations of 20 micromoles or more in the bottom waters. When mixing occurs, the soluble Mn(II) is rapidly removed via oxidation. This cycle occurs more than once during the summer, with each manganese atom probably being used several times for the oxidation of organic carbon. At the end of the fall, whole lake concentrations of manganese stabilize, and remain at about 1 micromole until the following summer, when the cycle begins again. Inputs and outflows from the lake indicate that the active Mn cycle is primarily internal, with a small accumulation each year into ferromanganese nodules located in the oxic zones of the lake.
Document ID
20040089257
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Aguilar, C.
(Great Lakes Water Institute, University of Wisconsin-Milwaukee 53204 United States)
Nealson, K. H.
Date Acquired
August 21, 2013
Publication Date
January 1, 1998
Publication Information
Publication: Journal of Great Lakes research
Volume: 24
Issue: 1
ISSN: 0380-1330
Subject Category
Exobiology
Funding Number(s)
CONTRACT_GRANT: NAGW1-047
Distribution Limits
Public
Copyright
Other
Keywords
NASA Discipline Exobiology
Non-NASA Center

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