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Archaeological assessment reveals Earth’s early transformation through land use

Land use by early farmers, pastoralists and even hunter-gatherer societies was extensive enough to have created significant global landcover change by 3,000-4,000 years ago.

This is much earlier than has been recognised, and challenges prevailing opinions concerning a mid-20th century start date for the Anthropocene. These are the findings of a new study published this week in Science, by a large international team of archaeologists and environmental scientists.

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This study brought together several hundred archaeologists from around the world, who pooled extensive datasets summarising decades of archaeological research. Nicole Boivin, Director of the Department of Archaeology at the Max Planck Institute for the Science of Human History and a lead author on the study, notes that “archaeologists possess critical datasets for assessing long-term human impacts to the natural world, but these remain largely untapped in terms of global-scale assessments”. She observes that “this novel crowd-sourcing approach to pooling archaeological data is extremely innovative, and has provided researchers with a unique perspective”.

Unique collaboration allows for creation of large database of archaeological data to study past environmental change

The ArchaeoGLOBE project was coordinated by an international team of researchers who developed an online survey to gather past land-use estimates from archaeologists with regional expertise. The current study offers a novel way to assess archaeological knowledge on human land use across the globe over the past 10,000 years. By incorporating online archaeological crowdsourcing, the study was able to incorporate the local expertise of 255 archaeologists to reach an unprecedented level of global coverage. This global archaeological assessment, and the collaborative approach it represents, will help stimulate and support future efforts towards the common goal of understanding early land use as a driver of long-term global environmental changes across the Earth system, including changes in climate.

“This type of work causes us to rethink the role of humans in environmental systems, particularly in the way we understand ‘natural’ environments,” said Lucas Stephens of the University of Maryland Baltimore County, University of Pennsylvania and Max Planck Institute for the Science of Human History, who led the global collaboration of archaeologists that produced the study. “It also allows us to identify patterns in the distribution of our data and prioritize future collection areas to improve the reliability of global datasets.”

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Study of archaeological data reveals huge impact of humans over thousands of years

“While modern rates and scales of anthropogenic global change are far greater than those of the deep past, the long-term cumulative changes wrought by early food producers are greater than many realize,” said Andrea Kay of the Max Planck Institute for the Science of Human History and The University of Queensland, a lead author on the study. “Even small-scale or shifting agriculture can cause global change when considered at large scales and over long time-periods,” she adds.

By acknowledging the deep time impact of humans on this planet and better understanding human-environment interactions over the long term, the researchers believe we can better plan for future climate scenarios and possibly find ways of mitigating negative impacts on soils, vegetation, and climate. “It’s time to get beyond the mostly recent paradigm of the Anthropocene and recognize that the long-term changes of the deep past have transformed the ecology of this planet, and produced the social-ecological infrastructures – agricultural and urban – that made the contemporary global changes possible,” said Erle Ellis of University of Maryland Baltimore County, a senior author who initially proposed and helped design the study. “These past changes produced the social-ecological infrastructures – agricultural and urban – that made the contemporary global changes possible.”

MAX PLANCK INSTITUTE FOR THE SCIENCE OF HUMAN HISTORY

Header Image – Human transformation of slopes for rice farming, Ubud, Bali. Credit : Andrea Kay

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Mark Milligan
Mark Milligan
Mark Milligan is a multi-award-winning journalist and the Managing Editor at HeritageDaily. His background is in archaeology and computer science, having written over 8,000 articles across several online publications. Mark is a member of the Association of British Science Writers (ABSW), the World Federation of Science Journalists, and in 2023 was the recipient of the British Citizen Award for Education, the BCA Medal of Honour, and the UK Prime Minister's Points of Light Award.
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