The Maya civilization's deforestation decimated carbon reservoirs in the tropical soils of the Yucatán peninsula region long after people abandoned ancient cities and the forests grew back, according to a new study.
The new findings, which appears in the journal
Nature Geoscience, underscore how important soils and our treatment of them could be in determining future levels of greenhouse gases in the planet's atmosphere.
The Maya began farming around 4,000 years ago, and the spread of agriculture and building of cities eventually led to widespread deforestation and soil erosion, previous research has shown. Scientists also suspect that deforestation contributed to the mysterious collapse of Mayan civilization more than 1,000 years ago.
What's most surprising in the new study is that the soils in the region haven't fully recovered as carbon sinks in over a millennium of reforestation, says McGill University geochemist Peter Douglas, lead author of the new paper.
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