𝔖 Bobbio Scriptorium
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Behavior of heavy metals in forest microcosms

✍ Scribed by B. S. Ausmus; G. J. Dodson; D. R. Jackson

Publisher
Springer Netherlands
Year
1978
Tongue
English
Weight
392 KB
Volume
10
Category
Article
ISSN
0049-6979

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✦ Synopsis

Smelter emissions (baghouse dust) and contaminated litter were applied to intact forest microcosms to determine effects of heavy metals on litter-soil carbon metabolism. Daily efflux of gaseous CO2 was monitored during the experiment. After 20 too, microcosms were harvested and effects on soil biota were determined.

Heavy metals increased daily CO2 efflux rates and cumulative gaseous carbon loss. In addition, seasonal patterns of CO2 efflux rates were altered. Soil bacterial density was significantly increased at the expense of soil fungal biomass.

Nondestructive monitoring of CO2 efflux provided an early indicator of smelter emission effects on soil biota. Effects on C metabolism may be detected prior to effects on communities or populations within chemically contaminated ecosystems.

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Effects of heavy metals on forest nutrient cycling processes were investigated using intact forest microcosms. Baghouse dust from a primary Pb smelter in southeastern Missouri Was applied on the microcosms to approximate one annual deposition of metals at 0.4 km from the smelter. Contaminated litter