@persagen
Extra articles with some data links:
https://www.pnas.org/doi/abs/10.1073/pnas.2402304121
https://phys.org/news/2024-11-genetic-analysis-hazelnut-trees-british.html
This hazelnut genetic data adds replicable findings to existing research such as in the below linked paper describing Northwest Coast agricultural.
https://sci-hub.se/10.1111/0033-0124.00322
The hazelnut researcher, Chelsey Armstrong's other study:
No surprise that forest-gardening, an ancient and wide-spread practice, would be used by the Northwest Coastal people.
https://en.wikipedia.org/wiki/Agroforestry#Forest_gardening