April 24, 2024 Zhang, H., X. Lü, A. K. Knapp, H. Hartmann, E. Bai, X. Wang, Z. Wang, X. Wang, Q. Yu and X. Han. 2018. Facilitation by leguminous shrubs increases along a precipitation gradient. Functional Ecology 32(1):203-213. Home » Zhang, H., X. Lü, A. K. Knapp, H. Hartmann, E. Bai, X. Wang, Z. Wang, X. Wang, Q. Yu and X. Han. 2018. Facilitation by leguminous shrubs increases along a precipitation gradient. Functional Ecology 32(1):203-213.