07:35am Thursday 19 October 2017

UC Davis researchers uncover earliest tobacco use in the Pacific Northwest

“The study demonstrates that tobacco smoking was part of the northwestern California culture very early … shortly after the earliest documented Pacific Northwest Coast plank house villages,” said the study, published in the Journal of Archaeological Science.

Testing organic residues extracted from pipes, researchers from the UC Davis Department of Anthropology and the Fiehn Metabolomics Laboratory of the UC Davis Genome Center confirmed tobacco was smoked, and likely grown in the region, by at least A.D. 860.

Perhaps more importantly, the researchers say that additional studies may help them better understand the origins of nicotine addiction and the human management, geographic range extension and cultivation of tobacco. Indeed, as part of a second study, the authors have recently detected nicotine in ancient pipes from an 800-year-old site in the modern city of Pleasanton, Calif.

“Despite the economic importance of tobacco today, we know very little about its antiquity,” said Shannon Tushingham, a UC Davis archaeology research associate and primary author of the study. “We believe Native American use of tobacco and other psychoactive plants is quite ancient. The methods we developed provide an important breakthrough which can be applied on even older pipes throughout the ancient Americas.”

Prior to this recent testing, which used sensitive gas chromatography/mass spectrometry, researchers were unsure of the historical use of tobacco on the Pacific Northwest Coast. It was unclear, for example, whether European traders had brought tobacco to the area much later, or if some other plant had been smoked in the pipes, Tushingham said.

Historic native peoples smoked a wide variety of plants, including tobacco, and pipes that researchers found at sites indicate smoking was an important part of ritual activities in the past. But archaeologists had found it difficult to detect what plants might have been smoked in the pipes because of the age and deterioration of pipes found. Early tobacco also had less nicotine content — less than 2 percent — and it is more difficult to detect than tobacco today, with a nicotine content of 4 to 8.5 percent, researchers said.

After two years of experimentation, the researchers developed a chemical process where residue is extracted directly from the stone or clay matrix of the pipes, leaving the pipe intact. By applying the process to one complete pipe and various fragments found at village sites in Tolowa ancestral territory, researchers found the biomarker nicotine, indicating that tobacco had been smoked. The Tolowa people traditionally lived in the Smith River basin and vicinity in northwestern California.

Co-authors of the study with Tushingham at UC Davis include Jelmer W. Eerkens, a professor of anthropology whose research centers on hunter-gatherers, and Oliver Fiehn, professor in the department of molecular and cellular biology and the genome center.

The study is available online at http://www.sciencedirect.com/science/article/pii/S0305440312004219.

About UC Davis

For more than 100 years, UC Davis has engaged in teaching, research and public service that matter to California and transform the world. Located close to the state capital, UC Davis has more than 33,000 students, more than 2,500 faculty and more than 21,000 staff, an annual research budget of nearly $750 million, a comprehensive health system and 13 specialized research centers. The university offers interdisciplinary graduate study and more than 100 undergraduate majors in four colleges — Agricultural and Environmental Sciences, Biological Sciences, Engineering, and Letters and Science. It also houses six professional schools — Education, Law, Management, Medicine, Veterinary Medicine and the Betty Irene Moore School of Nursing.

Media contact(s):

Karen Nikos, UC Davis News Service, (530) 752-6101


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