水柱
环境化学
浮游植物
微生物种群生物学
微生物
水生生态系统
海洋噬菌体
细菌
化学
海洋学
生态学
环境科学
生物
地质学
营养物
遗传学
作者
Sergio Balzano,Peter J. Statham,Richard D. Pancost,Jonathan R. Lloyd
出处
期刊:Aquatic Microbial Ecology
[Inter-Research Science Center]
日期:2009-03-04
卷期号:54: 291-303
被引量:23
摘要
The release of dissolved iron from artificial aggregates formed from oxic natural coastal water and senescent phytoplankton material was demonstrated under dark conditions.The rate of release was controlled by the amount of reducible Fe(III) available, and appears to be limited by the competing oxidation of Fe(II).Molecular (16S rRNA gene) analyses showed the bacterial community associated with the aggregates, originating from estuarine water, to be dominated by oxic heterorophs.However, it was possible to culture NO 3 -and Fe(III)-reducing bacteria from the artificial aggregates, and marine particles incubated with Fe(III) under anaerobic conditions contained microorganisms belonging to the genera Desulfovibrio and Marinobacter, bacteria known to reduce Fe(III).Whilst the precise mechanism of reduction is not clear, it is evident that marine aggregates can be a source of Fe(II), and thus ultimately iron in other forms, in coastal waters and most probably other natural water systems.
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