Invasive water hyacinth plant floats freely on Rio Ozama, Dominican Republic

invasive water hyacinth eichhornia crassipes rio ozama hyacinth river lilies jacinto de agua dominican republic aquatic plant santa domingo obstruction weeds plant float lillies water ways water plant river las de rio ozama green carpet perennial unwanted invader prevent light underwater environment deplete oxygen freefloating floats freely environmental impact green cover trash collector garbage ozama river puente ramon matias mella pontoon bridge bridge puente flotante floating bridge santo domingo drone aerial pullback birdseye view