sentences:  Though it is sometimes debated, "E. densa" is referred to as an ecosystem engineer as a result of the impact it has on a habitat once it is introduced.Some of these impacts are due to its fast growth and high dispersal rate when fragmented, its ability to adapt to different light and nutrient availability, its uptake of nutrients from the water column and its effect on sedimentation of these nutrients, and the large light-blocking canopy that its flowers form at the surface of the water.