Bamboo Fossils
Context:
Researchers have discovered an exceptionally preserved 37,000-year-old bamboo fossil in the silt-rich deposits of the Chirang River in Manipur's Imphal Valley.
The discovery is significant as bamboo fossils are extremely rare due to the rapid decay of their hollow stems and fibrous tissues.
Key Findings:
The fossil has been assigned to the genus Chimonobambusa which is the earliest known thorny bamboo fossil from Asia.
It retains fragile details like thorn scars and preserved buds, which almost never fossilize.
This provides the first fossil evidence that thorniness—a defense mechanism against herbivores—was present in Asian bamboo during the Ice Age.
Fig: The 37,000-year-old fossil bamboo (Chimonobambusa manipurensis), showing rare preservation of thorn scars (white arrows).
Climate Insights:
The fossil dates back to a period of colder and drier global climates, when bamboo was wiped out in many regions including Europe.
Its presence in Northeast India indicates that the region's warm and humid conditions allowed it to serve as a safe refuge for plants during the harsh Ice Age.
Significance:
The fossil shows that while harsh Ice Age conditions restricted bamboo’s global distribution, Northeast India provided a safe refuge where the plant could continue to thrive.
The finding highlights the Indo-Burma biodiversity hotspot as a crucial sanctuary for biodiversity during periods of global climatic stress
It contributes to a better understanding of bamboo evolution and the regional climate history of Asia.