@article {4697, title = {Relationship between freshwater gastropods and plant communities reflecting various trophic levels }, journal = {Hydrobiologia}, volume = {321}, year = {1996}, pages = {7-16}, keywords = {gastropod species, macrophyte communities, Multivariate Analysis, ponds, Species richness, trophic levels}, author = {Katherine Costil and Cl{\'e}ment, Bernard} }