Los anillos de crecimiento de árboles relacionan sequías con conflictos sociales

Research using Polylepis tarapacana tree rings shows that a severe drought from 1316 to 1371 in the Bolivian Altiplano coincided with a shift from vulnerable valley villages to fortified hilltop settlements (Pukaras), suggesting water scarcity triggered social conflict. The document warns that current warming, glacier shrinkage, and rising water demands from mining and agriculture increase the risk of similar conflicts today.

• Researchers used the annual growth of Polylepis tarapacana trees as a proxy for rainfall to reconstruct annual precipitation on the Bolivian Altiplano back to 1290. This analysis revealed a history of severe droughts, including the longest drought period of the last 700 years which began in 1316 and lasted until 1371.
• Archaeological evidence indicates a transition in the 14th century from 'vulnerable' villages on valley floors to fortified hilltop sites known as Pukaras. This shift coincided with the severe drought starting in 1316, suggesting that water scarcity for irrigation and consumption triggered social conflicts between neighboring communities and destabilized the local economy of herding and dryland agriculture.
• The Altiplano is currently experiencing persistent warming and unprecedented glacier shrinkage since the 1950s. Combined with population growth and increased water demands from agriculture and mining, these factors increase the risk of future water shortages and potential political and economic conflicts.

APA

Inter-American Institute for Global Change Research (2024). Los anillos de crecimiento de árboles relacionan sequías con conflictos sociales. https://iai.int/en/los-anillos-de-crecimiento-de-arboles-relacionan-sequias-con-conflictos-sociales/

Chicago

Inter-American Institute for Global Change Research. Los anillos de crecimiento de árboles relacionan sequías con conflictos sociales. 2024. https://iai.int/en/los-anillos-de-crecimiento-de-arboles-relacionan-sequias-con-conflictos-sociales/.

Wikipedia

{{cite report |author=Inter-American Institute for Global Change Research |title=Los anillos de crecimiento de árboles relacionan sequías con conflictos sociales |date=8 October 2024 |url=https://iai.int/en/los-anillos-de-crecimiento-de-arboles-relacionan-sequias-con-conflictos-sociales/ |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{interamericaninstituteforglobalchangeresearch2024los, author = {{Inter-American Institute for Global Change Research}}, title = {{Los anillos de crecimiento de árboles relacionan sequías con conflictos sociales}}, institution = {Inter-American Institute for Global Change Research}, year = {2024}, month = oct, url = {https://iai.int/en/los-anillos-de-crecimiento-de-arboles-relacionan-sequias-con-conflictos-sociales/}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }