April 12, 2024 Thoma, D. P., S. M. Munson and D. L. Witwicki. 2019. Landscape pivot points and responses to water balance in national parks of the southwest US. Journal of Applied Ecology 56(1):157-167. Home » Thoma, D. P., S. M. Munson and D. L. Witwicki. 2019. Landscape pivot points and responses to water balance in national parks of the southwest US. Journal of Applied Ecology 56(1):157-167.