Responses in root physiological characteristics of Vallisneria natans (Hydrocharitaceae) to increasing nutrient loadingsX. Cai, L. Yao, G. Gao, Y. Xie, J. Yang, X. Tang and M. ZhangKnowl. Manag. Aquat. Ecosyst., 417 (2016) 4DOI: https://doi.org/10.1051/kmae/2015036