CO study – how radio frequency effects aspen trees
Radio Frequency effects on Aspen trees
was written on the July 15, 2010 on
From Stan Hartman:
Lyons, CO woman studies how radio waves affect trees
By Bruce Leaf For the Camera
Boulder Daily Camera
A Lyons area woman with no academic pedigree has published a
scientific paper in the International Journal of Forestry Research
about the adverse effects of radio waves on aspen seedlings.
Katie Haggerty, who lives north of Steamboat Mountain, found in a
preliminary experiment done near her house that aspens shielded from
the waves were healthier than those that were not.
“I found that the shielded seedlings produced more growth, longer
shoots, bigger leaves and more total leaf area. The shielded group
produced 60 percent more leaf area and 74 percent more shoot length
than a mock-shielded group,” she said.
She began studying electromagnetic fields 20 years ago. In 2005, when
she noticed that her geraniums were stunted, she put the plants in a
Faraday cage, an enclosure covered by a metal screen that blocks radio
frequency energy, and soon found that the plants had larger leaves and
were growing more vigorously.
“When I heard about the aspen decline in Colorado, I thought it would
be a really good test case for this hypothesis, so I thought, ‘OK,
I’ll try them,'” Haggerty said. “And the other thing is that people
like aspen trees. They’re photogenic and it would get people’s
attention if I actually found something.”
Thousands of acres of aspen trees in Colorado have died in the past
decade, likely due to drought conditions, according to U.S. Forest
The atmosphere is saturated with radio waves from numerous sources,
most of which come from daily life in the modern world. Cell phones,
radios, televisions, weather radar, microwave ovens and microwave
communications are a few of the devices that emit radio waves.
“It’s a stew of various frequencies and signal types,” she said.
In spring 2007, she planted the aspen seedlings — one group in a
shielded Faraday cage, another group in a cage wrapped in fiberglass
that did not block radio waves and a third set was unprotected
altogether. By the end of July, there were measureable differences in
growth, and at the beginning of October, she noticed differences in
“The leaves in the shielded group produced striking fall colors, while
the two exposed groups stayed light green or yellow and were affected
by areas of dead leaf tissue,” Haggerty said. “The shielded leaves
turned red, which was a good sign. The unshielded leaves in both
exposed groups had extensive decay, and some leaves fell off while
they were still green.
“It appears that there may be negative effects on the health and
growth of aspens from the radio frequency background.”
She pointed out that her study was a preliminary experiment that only
suggests these effects in aspens and doesn’t prove anything.
“An experiment with multiple repetitions, meaning multiple shielded
and mock cages, and statistical analysis of results is needed to test
the hypothesis,” she said.
Still, her work caught the eye of Wayne Shepperd of the Forest
Service’s Rocky Mountain Research Station, who invited her to present
her findings at a regional conference on forest decline in Fort
Collins in 2008.
“People were interested because someone was looking in a new
direction,” she said.
The paper was later accepted for presentation at the North American
Forest Ecology Workshop at Utah State University in Logan last June.
As a result of that presentation, her paper was accepted to be
published in a special edition from the workshop of the peer-reviewed
online International Journal of Forestry Research.
Journal Editor Terry Sharik, a Utah State University professor, was
unaware Haggerty lacked a doctorate or a master’s or even a bachelor’s
degree, noting that a researcher’s educational background is not known
when a manuscript is submitted for review.
“I suspect that is not very common,” he said.
Even though her work is preliminary, Sharik said, “If she turns out to
be right following subsequent investigations by others, the results
could be very significant and cause people to rethink the current
notion that anthropogenic sources of radio waves are fairly harmless
to the environment and by extension to humans.”