Stable carbon and nitrogen isotopic characterization and tracing nutrient sources of Ulva blooms around Jeju coastal areas. (November 2019)

• Record Type: Journal Article
• Authors: Samanta, Palas; Shin, Sookkyung; Jang, Sojin; Song, Young-Cheol; Oh, Sangsil; Kim, Jang K.
• Is Part Of: Environmental pollution. Volume 254(2019)Part A
• Publication Date: 2019-11
• Subjects: Jeju island -- Ulva blooms -- C/N ratio -- δ13C -- δ15N -- δ18O; Pollution -- Periodicals; Pollution -- Environmental aspects -- Periodicals; Environmental Pollution -- Periodicals; Pollution -- Périodiques; Pollution -- Aspect de l'environnement -- Périodiques; Pollution -- Effets physiologiques -- Périodiques; Pollution; Pollution -- Environmental aspects; Periodicals; Electronic journals; 363.73
• DOI: 10.1016/j.envpol.2019.113033
• Languages: English
• ISSNs: 0269-7491

Abstract

Abstract: The present investigation was aimed to characterize the Ulva blooms and to identify the probable sources for Ulva blooms along the Jeju Island coast for pertinent control measures. Algal isotope signatures (δ 13 C, δ 15 N and δ 18 O) and tissue nitrogen and carbon were analyzed to map nutrient sources around the Jeju coastal areas. The algal δ 13 C values were ranged from −20.52 to −4.39‰, while δ 15 N and δ 18 O values ranged from 4.26 to 8.29‰ and 12.80–17.34‰, respectively. Moreover, site-specific significant differences were observed in algal stable isotope (δ 13 C, δ 15 N and δ 18 O) values. The bi-plot (δ 15 N vs δ 18 O) diagram indicated four dominant nitrogen sources along the Jeju coast, with 1) soil organic nitrogen mixed with livestock wastes (spring water samples and E), the 2) synthetic fertilizer input (A3 and B2), 3) sewage discharge (D1, D2 and I3) and 4) aquaculture waste (fish farm samples, A4, A5, B1, G and I2). Present findings revealed the different potential nitrogen sources for localized increase of algal growth along the Jeju coast. Finally, the present findings could be used as baseline data for efficient nutrient management to remediate Ulva blooms along Jeju coastal environment. Graphical abstract: Image 1 Highlights: Algal blooms displayed site-specific variations in δ 13 C, δ 15 N and δ 18 O values. Jeju coast affected by four major types of nutrient sources. Aquaculture farms especially finfish is the major contributor of nutrients. Fish farm samples (A1, F and I1) recorded enhanced δ 15 N values. Abstract : Stable carbon and nitrogen isotopic characterization and possible nutrient sources of Ulva blooms around Jeju coastal areas were investigated for pertinent control measures.