Giant Salvinia

Scientific name: Salvinia molesta This floating aquatic fern can form dense vegetation mats that reduce water-flow and lower light and oxygen levels in water. This stagnant dark environment negatively affects the biodiversity and abundance of freshwater species, including fish and submerged aquatic plants. Salvinia invasions can alter wetland ecosystems and cause wetland habitat loss. ( Photo credit: CC-BY-SA-3.0 via Wikimedia Commons

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