Accession Number:

ADA297184

Title:

ELF Communications System Ecological Monitoring Program: Aquatic Ecosystem Studies.

Descriptive Note:

Final rept. for 1982-1994,

Corporate Author:

IIT RESEARCH INST CHICAGO IL

Report Date:

1994-11-01

Pagination or Media Count:

166.0

Abstract:

The U.S. Navy has completed a program that monitored biota and ecological relationships for possible effects from electromagnetic EM fields produced by its Extremely Low Frequency ELF Communications System. This report documents the results and conclusions of aquatic studies conducted near its transmitting antenna in Michigan. From 1982 through 1993 researchers from the Michigan State University MSU monitored aquatic flora and fauna on matched reaches of the Ford River. A treatment site was located immediately adjacent to the antenna, whereas a control site was situated at a distance downstream. Functional and structural components of the periphyton, insect, and fish communities were monitored. The research team also measured ambient factors such as temperature, discharge, and water quality indicators. Data were analyzed using a variety of statistical tests however, BACI techniques were emphasized. Results indicated a relative increase in algal biomass at the treatment site after the antenna became fully operational, but no changes in any other parameter or organism. MSU concludes that algal biomass was affected by ELF EM exposure. Since neither the other ecological characteristics of the periphyton nor the insect and fish communities showed any effects, MSU infers little EM impact to riverine habitats.

Subject Categories:

  • Ecology
  • Electricity and Magnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE