Giant Duckweed

Submerged hornwort and surface duckweed compete for available light in water column

Giant Duckweed's dense surface coverage reduces light availability for submerged Water Lobelia

Both species form dense floating mats competing for surface space and light access

Giant duckweed forms dense surface coverage that blocks light needed by other floating-leaved plants

Giant duckweed surface coverage blocks light needed by spatterdock for photosynthesis

Large floating plants like Spirodela create dense surface coverage that blocks light needed by floating-leaved plants like Nymphoides

Dense duckweed mats block light needed by submerged and emergent sword plants

Both aggressive floating species compete for surface area and light access