ELF Communications System Ecological Monitoring Program: Upland Flora Studies.
IIT RESEARCH INST CHICAGO IL
Pagination or Media Count:
The U.S. Navy has completed a program monitoring flora, fauna, and ecological relationships for possible effects from electromagnetic EM fields produced by its Extremely Low Frequency ELF Communications System. This report documents studies of upland flora conducted near the Navys transmitting antenna in Michigan. From 1982 through 1993 researchers from the Michigan Technological University MTU monitored tree, herb, and fungal species dominant in areas nEar treatment and far control from the ELF antenna. Above-ground parameters included the productivity, physiology, and phenology of trees, as well as the morphology and phenology of an herb. Below-ground, the important association between tree roots and fungi were monitored. Investigators also measured ambient weather conditions, soil nutrients, and EM field intensities. The MTU research team used analysis of variance and covariance to examine the data. When site-by-year interactions were significant, correlations and regressions were used to determine whether residuals were related to EM exposure. Results suggest a possible subtle EM effect to the cambial and stemwood growth of some tree species but not to any other parameter. MTU investigators conclude no short-term, adverse effects on forest health from exposure to EM fields produced by the Naval Radio Transmitting Facility-Republic, Michigan.
- Electricity and Magnetism