Turnbull, L., Wainwright, J., Brazier, R., & Bol, R. (2010). Biotic and Abiotic Changes in Ecosystem Structure over a Shrub-Encroachment Gradient in the Southwestern USA. Ecosystems, 13(8), 1239-1255. https://doi.org/10.1007/s10021-010-9384-8