Keywords bald eagle black bear brown bear common raven recreation stable isotopes tea bag index temperate rainforest Tongass vigilance Get full text access Log in, subscribe or purchase for full access. References 1. Helfield, J.M. ∙ Naiman, R.J. Keystone interactions: Salmon and bear in riparian forests of Alaska Ecosystems. 2006; 9:167-180 2. Wilson, M.W. ∙ Ridlon, A.D. ∙ Gaynor, K.M. ... Ecological impacts of human-induced animal behaviour change Ecol. Lett. 2020; 23:1522-1536 3.