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Regular light cycles greatly influence organisms, and phenomena like solar eclipses trigger distinct physiological and behavioral responses. Although extensively studied in animals, plant behavior during solar eclipses remains relatively unexamined. Recent research conducted by scientists from Italy, the UK, Spain, and Australia explored the bioelectric responses of multiple Spruce trees (Picea abies) in relation to solar eclipses.
A study site in the Dolomite Mountains, Italy. Image credit: Monica Galliano / Southern Cross University.
Periodic sunlight fosters global weather patterns, seasons, and climates that sustain life on Earth.
The daily and seasonal rhythms of natural light align biological systems by synchronizing their internal clocks with the Earth’s geophysical cycles.
In an era marked by significant human-induced alterations to natural cycles, extraordinary astronomical events such as solar eclipses serve as natural experiments, offering crucial perspectives on how organisms react to sudden, rare environmental changes.
“Our study reveals that forests play a vital role in how species communicate and adapt, uncovering a new layer of complexity in plant behavior,” noted Professor Monica Galliano from Southern Cross University.
“It’s essentially evidence of the renowned ‘Wood Wide Web’ in action!”
This investigation employed an innovative remote measurement system to monitor multiple trees simultaneously within the forest.
This setup enabled researchers to assess whether and to what degree individual trees respond collectively to the solar eclipse, functioning as a larger living entity.
The study analyzed the electrical signals in spruce trees to characterize their bioelectrical activity during a partial solar eclipse that occurred in the Dolomite Mountains of northeastern Italy.
Results demonstrated that individual trees exhibited significant synchronization in their electrical activity before and after the solar eclipse, operating as an integrated living system that manages their reactions to external influences.
“Using advanced analytical techniques, including complexity measures from Quantum Field Theory,” stated Professor Alessandro Thioleoreo of the Italian Institute of Technology and the University of England, “we now regard forests not merely as individual collections but as ensembles of interconnected plants.”
“These findings reinforce the need to protect ancient trees,” Professor Galliano added.
“The fact that older trees are the first to react and possibly lead a collective response emphasizes their role as repositories of historical environmental knowledge.”
“This discovery underscores the critical importance of safeguarding old forests, which act as cornerstones of ecosystem resilience by conserving and sharing invaluable ecological insights.”
The study is published in the journal Royal Society Open Science.
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Alessandro Chiolerio et al. 2025. Bioelectric Synchronization of Picea abies During a Solar Eclipse. R. Soc. Open SCI 12(4): 241786; doi: 10.1098/rsos.241786
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Source: www.sci.news
