Long-term relationships between molybdenum and sulfur concentrations in red cedar tree rings. [Juniperus virginana L]
- Univ. of Missouri, Columbia (USA)
Molybdenum and S concentrations were determined in growth increments of 13 eastern redcedar (Juniperus virginana L.) trees from the Ozark region of Missouri. Chonologies were constructed, which dated from 1280 to 1960 for Mo, and from 1580 to 1960 for S.A 45% increase in Mo concentrations occurred between 1720 and 1860 when compared with the previous 440 yr. A decline in heartwood Mo concentration, beginning in 1860, is hypothesized to be due to increasing soil sulfate from the atmospheric deposition of S compounds. There was a 65% reduction in Mo concentration concomitant with a 44% increase in S concentrations in redcedar heartwood formed after 1860. Sulfur and Mo concentrations were found to be negatively correlated in serial heartwood increments. Competition between sulfate and molybdate ions in soil solutions are thought to have decreased Mo in recent heartwood growth increments.
- OSTI ID:
- 6907073
- Journal Information:
- Journal of Environmental Quality; (USA), Vol. 18:3; ISSN 0047-2425
- Country of Publication:
- United States
- Language:
- English
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01 COAL, LIGNITE, AND PEAT
CEDARS
PLANT GROWTH
MOLYBDENUM
ECOLOGICAL CONCENTRATION
SULFUR
TREE RINGS
CHEMICAL COMPOSITION
ATMOSPHERIC CHEMISTRY
CORRELATIONS
DEPOSITION
MISSOURI
SOIL CHEMISTRY
TIME DEPENDENCE
CHEMISTRY
CONIFERS
ELEMENTS
FEDERAL REGION VII
GROWTH
METALS
NONMETALS
NORTH AMERICA
PINOPHYTA
PLANTS
TRANSITION ELEMENTS
TREES
USA
540220* - Environment
Terrestrial- Chemicals Monitoring & Transport- (1990-)
540120 - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)
010900 - Coal
Lignite
& Peat- Environmental Aspects