Trees and fish were the most important resources to the Powhatan and Tlingit tribes.
They depended for survival on the abundance of trees in their surroundings to create their homes and make fires, and fish for sustenance. <span />
Ancient DNA analysis has revealed an involvement of the bacterial pathogen Yersinia pestis in several historical pandemics, including the second plague pandemic (Europe, mid-14(th) century Black Death until the mid-18(th) century AD).