Environment & Ecology · Environment
A planner is evaluating the environmental benefits of introducing floating gardens on a polluted urban lake where excessive aquatic weed growth is a serious issue. From the perspective of nutrient recycling, water quality improvement, and productive use of biomass, which statement best describes a legitimate advantage of integrating floating garden systems using harvested aquatic weeds?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Harvested aquatic weeds are always burned on the shore, which intentionally releases nutrients back into the atmosphere instead of recycling them in plant production.
- 2Using aquatic weeds as raft and substrate material converts an otherwise problematic biomass into a growing medium, gradually immobilizing part of the nutrients in crop biomass and potentially reducing some of the free nutrient load in the water.✓
- 3The presence of floating gardens always increases nutrient concentration in the water because decomposition products are directly released without any uptake by crops.
- 4Floating gardens cannot be constructed from aquatic weeds, as they must legally use only inert, non-decomposing plastic materials.
Correct answer
Using aquatic weeds as raft and substrate material converts an otherwise problematic biomass into a growing medium, gradually immobilizing part of the nutrients in crop biomass and potentially reducing some of the free nutrient load in the water.
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