Mayali Xavier, Azam Farooq
Scripps Institution of Oceanography, University of California San Diego, La Jolla, California 92093-0202, USA.
J Eukaryot Microbiol. 2004 Mar-Apr;51(2):139-44. doi: 10.1111/j.1550-7408.2004.tb00538.x.
Over the past two decades, many reports have revealed the existence of bacteria capable of killing phytoplankton. These algicidal bacteria sometimes increase in abundance concurrently with the decline of algal blooms, suggesting that they may affect algal bloom dynamics. Here, we synthesize the existing knowledge on algicidal bacteria interactions with marine eukaryotic microalgae. We discuss the effectiveness of the current methods to characterize the algicidal phenotype in an ecosystem context. We briefly consider the literature on the phylogenetic identification of algicidal bacteria, their interaction with their algal prey, the characterization of algicidal molecules, and the enumeration of algicidal bacteria during algal blooms. We conclude that, due to limitations of current methods, the evidence for algicidal bacteria causing algal bloom decline is circumstantial. New methods and an ecosystem approach are needed to test hypotheses on the impact of algicidal bacteria in algal bloom dynamics. This will require enlarging the scope of inquiry from its current focus on the potential utility of algicidal bacteria in the control of harmful algal blooms. We suggest conceptualizing bacterial algicidy within the general problem of bacterial regulation of algal community structure in the ocean.
在过去二十年中，许多报告揭示了能够杀死浮游植物的细菌的存在。这些杀藻细菌的丰度有时会随着藻华的减少而同时增加，这表明它们可能会影响藻华动态。在此，我们综合了关于杀藻细菌与海洋真核微藻相互作用的现有知识。我们讨论了在生态系统背景下表征杀藻表型的当前方法的有效性。我们简要回顾了关于杀藻细菌的系统发育鉴定、它们与藻类猎物的相互作用、杀藻分子的表征以及藻华期间杀藻细菌计数的文献。我们得出结论，由于当前方法的局限性，杀藻细菌导致藻华减少的证据是间接的。需要新的方法和生态系统方法来检验关于杀藻细菌对藻华动态影响的假设。这将需要扩大研究范围，从目前对杀藻细菌在控制有害藻华中潜在效用的关注中跳脱出来。我们建议在海洋中细菌对藻类群落结构调控的一般问题框架内对细菌杀藻作用进行概念化。
