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学科主题: Marine & Freshwater Biology; Oceanography
题名: Release and bioavailability of C, N, P, Se, and Fe following viral lysis of a marine chrysophyte
作者: Gobler, CJ ; Hutchins, DA ; Fisher, NS ; Cosper, EM ; Sanudo-Wilhelmy, SA
刊名: LIMNOLOGY AND OCEANOGRAPHY
发表日期: 1997-01-01
卷: 42, 期:7, 页:1492-1504
部门归属: SUNY Stony Brook, Mat Sci Res Ctr, Stony Brook, NY 11794 USA
英文摘要: The potential importance of the viral lysis of phytoplankton for nutrient and carbon cycling has been acknowledged, but no quantitative assessments of this phenomenon exist. Radiotracer experiments examined the release and bioavailability of C, N, P, Fe, and Se following viral lysis of the "brown tide" chrysophyte Aureococcus anophagefferens. Photochemical effects on the dissolved-particulate partitioning and biological uptake of virally released elements were also investigated. Viral lysis of A. anophagefferens released 50% mon C and Se than uninfected control cells to the dissolved phase, while N, P, and Fe remained in the particulate phase. There was a significant inverse correlation between A. anophagefferens and bacterial densities, as well as an increase in particulate organic nitrogen levels in cultures during viral lysis. These observations indicate that released dissolved organic matter supported bacterial growth and may be a pathway by which various elements are diverted in microbial food webs. Dissolved nutrients released by viral lysis were accumulated to varying degrees by natural assemblages of marine bacteria and cultured diatoms, and vitally regenerated N and P relieved diatom nutrient limitation. During a 4-wk incubation, 80% of C and P within cell lysis debris was released to the dissolved phase, likely due to bacterial activity. Photochemical degradation of cell lysis debris enhanced dissolved levels of Se (100%) and Fe (50%) and reduced total dissolved C by 15%. Photochemistry doubled the bioavailability of virally released Se to diatoms, while decreasing the bioavailability of C to bacteria threefold. The viral lysis of an A. anophagefferens bloom in the field could release 40 mu M dissolved organic carbon and rapidly transfer other released elements to bacteria. Such occurrences may significantly affect water column chemistry, species composition, and succession within marine plankton communities.
语种: 英语
原文出处: 查看原文
内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/9298
Appears in Collections:海洋微食物网高被引文献_期刊论文

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Gobler, CJ; Hutchins, DA; Fisher, NS; Cosper, EM; Sanudo-Wilhelmy, SA.Release and bioavailability of C, N, P, Se, and Fe following viral lysis of a marine chrysophyte,LIMNOLOGY AND OCEANOGRAPHY,1997,42(7):1492-1504
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