Morphological variation in Eichhornia azurea (Kunth) and Eichhornia crassipes (Mart.) Solms in relation to aquatic vegetation type and the environment in the floodplain of the Rio Paraná, Brazil

摘要: Eichhornia azurea and E. crassipes are the most frequent dominants of aquatic vegetation in floodplain Upper Rio Parana Brazil. Morphological traits samples collected at sites where they dominated were measured compared between types identified floodplain. Total leaf weight, specific area to root weight ratio total dry plant differed significantly from 1999. Pearson correlation coefficients indicated a number significant relationships morphological environmental variables. Five increased linearly with water depth four clarity. The also sediment iron calcium content. respectively quadratically related euphotic proportion column. while remainder decreased phosphorus