Ancient Maya Adapted Farming Methods as Population Grew, New Study Finds
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A new study of sediment cores from a Guatemalan lake reveals how Maya farming practices evolved over millennia. Researchers found that as the population at the Itzan site grew, the Maya shifted from slash-and-burn agriculture to more intensive, fire-free methods. The site was ultimately abandoned around 1,000 years ago, but the sediment record shows no signs of drought in the region at that time.
Facts First
- Sediment cores from Laguna Itzan provide a 3,300-year environmental record of the nearby Maya archaeological site.
- Maya farming shifted from slash-and-burn to intensive methods as population density increased during the Classic period.
- The Itzan site was abandoned approximately 1,000 years ago after a sharp population decline.
- The study found no evidence of drought at Itzan during the period of the Maya population decline.
- Researchers used geochemical markers to reconstruct fire use, vegetation, rainfall, and population size.
What Happened
Researchers led by geography professor Benjamin Gwinneth analyzed sediment cores from Laguna Itzan in Guatemala to study environmental change at the nearby Maya archaeological site. The sediment records stretch back 3,300 years. The team examined geochemical markers: polycyclic aromatic hydrocarbons to indicate fire intensity, leaf waxes to reflect vegetation and rainfall, and fecal stanols to estimate population size. The data shows human presence began around the lake 4,000 years ago, with permanent settlements appearing 3,200 years ago. During the Preclassic period, the Maya practiced slash-and-burn agriculture. During the subsequent Classic period, population density increased and the use of fire dropped sharply, indicating a shift to intensive farming methods like ridge and furrow ploughing. The population at Itzan declined sharply during the Terminal Classic period and the site was abandoned approximately 1,000 years ago. The sediment records show no signs of drought at Itzan during this period of decline.
Why this Matters to You
This research refines our understanding of how ancient societies interacted with their environment, which may offer lessons for modern sustainability. The findings demonstrate that a major civilization successfully adapted its agricultural practices to support a growing population over centuries. The study's methods, using lakebed sediments to reconstruct past climate and human activity, could be applied to other regions to better understand long-term environmental change.
What's Next
The detailed environmental record from Itzan may be compared with data from other Maya sites to build a broader picture of the civilization's resilience and challenges. Further analysis of similar sediment cores across the Maya lowlands could help clarify the complex causes of the regional population decline between 750 and 900 CE.