Incorporation of oil into diatom aggregates

doi:10.3354/meps12881

LZUFE-KMS

	Incorporation of oil into diatom aggregates
	Passow, U.1,2; Sweet, J.1; Francis, S.1; Xu, C.3; Dissanayake, A. L.4; Lin, Y. -Y.5; Santschi, P. H.3; Quigg, A.3
	2019-03-07
发表期刊	MARINE ECOLOGY PROGRESS SERIES
卷号	612 页码:65-86
摘要	Rolling table experiments were conducted to investigate the incorporation of 2 types of dispersed oil into diatom aggregates. The goal was to provide specific input parameters for aggregation models that predict the transport of oil to depth via marine snow-sized aggregates (>0.5 mm). The amount of oil incorporated into aggregates is a function of both aggregated biomass and dispersed oil concentration. The maximum carrying capacity of diatom aggregates for dispersed oil likely lies at similar to 40% of the aggregated organic carbon. These data allow estimates of the amount of oil routed via the aggregation pathway. Furthermore, the concentrations of transparent exopolymer particles (TEP) and the composition of EDTA-extracted extracellular polymeric substances (EPS) were tested as generally valid proxies for stickiness, which is a critical value in aggregation models. TEP and EDTA-extractable EPS were correlated with each other, but aggregation success was not readily predictable from these measurements. The large chemical heterogeneity of TEP and EPS likely obscures a generally valid relationship. Additionally, we found that, contrary to expectations, the sinking velocity of oil-containing aggregates was not decreased, but slightly increased compared to their non-oil-containing counterparts. Tighter packaging of cells due to the oil likely causes this effect. Sinking velocity is an important parameter in aggregation-sedimentation models, as it determines the time required for aggregates to reach the seafloor and thus the potential for flux attenuation. Transport of oil to the seafloor exposes benthic organisms, and those feeding on them, to substances that potentially have negative effects on organisms and ecosystems.
关键词	Diatom-oil interaction Oil distribution Aggregation of oil Sedimentation of oil
DOI	10.3354/meps12881
收录类别	SCIE
ISSN	0171-8630
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Oceanography
WOS类目	Ecology ; Marine & Freshwater Biology ; Oceanography
WOS记录号	WOS:000464518900005
出版者	INTER-RESEARCH
原始文献类型	Article
引用统计	被引频次：34[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.lzufe.edu.cn/handle/39EH0E1M/31536
专题	兰州财经大学
作者单位	1.Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA; 2.Mem Univ, St John, NF A1M 5S7, Canada; 3.Texas A&M Univ Galveston, Galveston, TX 77554 USA; 4.RPS Ocean Sci, South Kingstown, RI 02879 USA; 5.Univ N Carolina, Chapel Hill, NC 27599 USA
推荐引用方式 GB/T 7714	Passow, U.,Sweet, J.,Francis, S.,et al. Incorporation of oil into diatom aggregates[J]. MARINE ECOLOGY PROGRESS SERIES,2019,612:65-86.
APA	Passow, U..,Sweet, J..,Francis, S..,Xu, C..,Dissanayake, A. L..,...&Quigg, A..(2019).Incorporation of oil into diatom aggregates.MARINE ECOLOGY PROGRESS SERIES,612,65-86.
MLA	Passow, U.,et al."Incorporation of oil into diatom aggregates".MARINE ECOLOGY PROGRESS SERIES 612(2019):65-86.