期刊
MARINE POLLUTION BULLETIN
卷 166, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2021.112199
关键词
Bioremediation; Nutrients; Photosynthesis; Pollution; Salinity; Ulva
资金
- Kelp Ecology Lab at SDSU
- Department of Energy ArpaE [DEAR0001171]
- CSU Council on Ocean Affairs, Science & Technology (COAST) Undergraduate Research Award
- National Research Foundation of Korea (NRF) [NRF2019R1A4A1026423]
Ulva was negatively affected by decreased salinity, but the effects were mitigated by adding nutrients, allowing it to maintain bloom potential under reduced salinities. Increased nutrients altered nitrogen and carbon uptake pathways in Ulva, enhancing its growth potential.
We studied Ulva lactuca to determine its potential for bioremediation of coastal watersheds. We cultured Ulva in orthogonal combinations of two salinities and three nutrient concentrations for six weeks, and then measured its growth, photosynthesis, chlorophyll fluorescence, nitrogen, carbon and phosphorus tissue concentrations, and carbon and nitrogen uptake pathways. Our findings show that Ulva was negatively affected by decreased salinity but these effects were ameliorated by the addition of nutrients to the water, such as would be expected from freshwater runoff during heavy rain events. Also, increased nutrients resulted in altered nitrogen (NH4+ vs. NO3? ) and carbon (HCO3? vs. CO2) uptake pathways, which can allow Ulva to retain its bloom potential even under reduced salinities. Together, our study suggests that Ulva is an ideal species to grow for the purpose of bioremediation of coastal bays and estuaries, even during storms that freshen the surface waters and increase nutrients.
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