Effects of microphytobenthos Cylindrotheca closterium on the fate of di-n-butyl phthalate in an aquatic microcosm. (March 2019)

• Record Type: Journal Article
• Authors: Zhang, Fan; Ding, Zheng; Gong, Haofei; Chi, Jie
• Is Part Of: Marine pollution bulletin. Volume 140(2019)
• Page Start: 101
• Page End: 106
• Publication Date: 2019-03
• Subjects: Microphytobenthos -- Cylindrotheca closterium -- Di‑n‑butyl phthalate (DBP) -- Fugacity model -- Bacterial community structure; Marine pollution -- Periodicals; Marine Biology -- Periodicals; Water Pollution -- Periodicals; Mer -- Pollution -- Périodiques; Publications périodiques; Pollution des mers; Lutte antipollution; Electronic journals; 363.7394
• DOI: 10.1016/j.marpolbul.2019.01.033
• Languages: English
• ISSNs: 0025-326X

Abstract

Abstract: Effects of Cylindrotheca closterium, a marine benthic diatom, on the fate of di-n-butyl phthalate (DBP) in a water-sediment system were investigated. Model calculation results showed that DBP residue was 38.5% lower in the system with C . closterium than in the system without C . closterium . The net flux from water to sediment increased by 7.3 times in the presence of C . closterium . As a result, the total biodegradation flux of DBP in the system with C . closterium was increased by 25.6%. According to the 16 s rDNA sequencing, the presence of C . closterium decreased the bacterial population as well as bacterial community diversity in sediments. Moreover, the population of C . closterium, capable of efficiently degrading DBP, was much higher than that of the dominant DBP-degrading bacteria, demonstrating that degradation of DBP by C . closterium should be the main reason for the degradation enhancement in sediments. Graphical abstract: Unlabelled Image Highlights: A level IV fugacity model successfully simulated DBP fate in an aquatic microcosm. C. closterium reduced DBP residues and enhanced its degradation in the microcosm. C. closterium increased DBP's net flux from water to sediment by 7.3 times. C. closterium biomass was much higher than that of dominant DBP-degrading bacteria. Driving force for C. closterium effect on DBP fate was DBP degradation by the alga.