A novel submerged Rotala rotundifolia, its growth characteristics and remediation potential for eutrophic waters

Abstract

The vegetative growth and remediation potential of Rotala rotundifolia, a novel submerged aquatic plant, for eutrophic waters were investigated on different sediments, and under a range of nitrogen concentrations. Rotala Rotundifolia grew better on silt than on sand and gravel in terms of plant height, tiller number and biomass accumulation. Percent increment of biomass was enhanced at low water nitrogen (ammonium nitrogen concentration ≤10 mg/L). The maximum total nitrogen and total phosphorus removals in the overlying water were between 54% to 66% and 42% to 57%, respectively. Nitrogen contents in the sediments increased with increasing water nitrogen levels, whereas, nitrogen contents in the plant tissues showed no apparent regularity, and the greatest value was obtained at ammonium nitrogen concentration 15 mg/L. Both phosphorus contents in the sediments and tissues of plants were not affected significantly by additional nitrogen supply. Direct nitrogen uptake by plants was in the range of 16% to 39% when total phosphorus concentration was 1.0 mg/L. These results suggested that Rotala Rotundifolia can be used to effectively remove nitrogen and phosphorus in eutrophic waters.

The The Growth Performance and Physiological Status of Comet Goldfish (Carassius auratus) in Aquascape System with Different Aquatic Plant Species

“…The results showed that there was a significant difference found between the comet goldfish reared with and without aquatic plants. The plants which supported highest SOD value of the fish were C. furcata is containing bioactive phytochemical such as saponin (Khalid et al, 2013;Subramoni et al, 2019) and Rotala can be used to effectively remove nitrogen and phosphorus in eutrophic waters (Gu et al, 2019). This study showed that the increased of total erythrocytes in different aquatic plant applications comet goldfish did not experience metabolic stress, which means that the aquatic plants have good performance in maintaining the fish health without damaging the blood vessels of the fish.…”

Incorporating Microbial Species Interaction in Management of Freshwater Toxic Cyanobacteria: A Systems Science Challenge

“…Alternatively, organisms can be installed or manipulated at the edge of the habitat afflicted with toxic cyanobacteria (or in a connected habitat that is upstream) to modify environmental conditions. Examples of this include the planting of cover crops to reduce soil erosion in agricultural systems [49], the construction of riparian buffer zones and floating wetlands to curb or counteract influx of nutrients and cyanobacteria from terrestrial sources [49,50], and the seeding of lake habitats or adjacent riparian buffer zones with organisms capable of diverting, eliminating, or mineralizing nutrients (e.g., submerged aquatic vegetation and filter-feeding bivalves [51,52]).…”

Isolation, Identification and Pollution Prevention of Bacteria and Fungi during the Tissue Culture of Dwarf Hygro (Hygrophila polysperma) Explants

“…Aquatic plants are broadly defined as plants that undergo chloroxygenic photosynthesis, containing numerous single-cell and multicellular species with abundant populations [20]. They play ecological and functional roles in various aspects, such as assimilating excessive nutrients (e.g., nitrogen and phosphorus) in eutrophic waters [21,22], removing heavy metals and nanoparticles in wastewater [23][24][25][26][27], and maintaining mutual benefit with aquatic animals [28], as well as future biofuels [29] and medicinal plants [30][31][32][33]. Importantly, most of them were beautiful ornamental plants in the aquarium, with high commercial value [2][3][4]34,35].…”