Effects of salinity and nutrients on metabolism and growth of Ulva lactuca: Implications for bioremediation of coastal watersheds

MARINE POLLUTION BULLETIN

卷:166

Article

Bews, Emily¹  Booher, Leslie^1,2  Polizzi, Torre²  Long, Christopher¹  Kim, Ju-Hyoung³  Edwards, Matthew S.¹ 

[1] San Diego State Univ, Dept Biol, 5500 Campanile Dr, San Diego, CA 92182 USA

[2] Sunken Seaweed LLC, 1976 Quail Glen Rd, Escondido, CA 02029 USA

[3] Kunsan Natl Univ, Fac Marine Appl Biosci, Gunsan 54150, South Korea

关键词: Bioremediation;    Nutrients;    Photosynthesis;    Pollution;    Salinity;    Ulva;   

DOI  :  10.1016/j.marpolbul.2021.112199

来源: Elsevier

【 摘 要 】

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.

【 授权许可】

Free