Aerial View of Pando
Pando is a unique ecosystem consisting of a single male specimen of trembling aspen (Populus tremuloides) that has expanded into a massive colony. Covering 40 hectares, it comprises roughly 47,000 genetically identical trunks sharing one root system. This organism weighs 6,000 metric tons and is estimated to be 12,000 years old. Individual tree-like stems can reach heights of up to 24 meters.
Sound artist Jeff Rice, working with the organization 'Friends of Pando,' captured vibrations and sounds using a hydrophone, confirming the interconnectedness of the underground network. The hydrophone was inserted into a cavity at the base of a branch, where it detected oscillations and noises from plant tissue surfaces. During a thunderstorm, the sound intensified, transforming into a low, eerie hum. The equipment registered a tap on a branch more than 27 meters (90 feet) away from the sensor—a sound that was inaudible through the air at that distance.
Investigating Sound Characteristics
Detailed results of the audio recordings were presented at the 184th meeting of the Acoustical Society of America. As Lance Oditt noted,
“this acoustic project, which began as an artistic initiative, holds enormous scientific potential”.
It is worth noting, however, that aspens rarely reproduce by seed due to infrequent pollination. Pando also faces threats from human activity, particularly the removal of predators, which could harm this fragile ecosystem.
The study of Pando's sound characteristics not only highlights its uniqueness as a biodiversity hotspot but also opens new avenues for scientific research into plant ecology and communication. The urgency of preserving such ecosystems becomes increasingly clear amid climate change and human impact, underscoring the need to protect natural resources and maintain biodiversity.