Control of Toxic Marine Dinoflagellate Blooms by Serial Parasitic Killers
Control of Toxic Marine Dinoflagellate Blooms by Serial Parasitic Killers
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DOI：
10.1126/science.1164387
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发表时间：
2008-11-21
期刊：
影响因子：
56.9
通讯作者：
Guillou, Laure
中科院分区：
文献类型：
--
作者：
Chambouvet, Aurelie;Morin, Pascal;Guillou, Laure
通常导致有毒赤潮的海洋甲藻被其他甲藻物种寄生。使用独立于培养的环境核糖体RNA序列和荧光标记，我们在几个物种中鉴定了宿主特异性感染。每只寄生蜂产生60到400个后代，导致对寄主种群的极快控制。在天然河口连续3年的观察中，所有观察到的甲藻都是慢性感染的，并且某一寄主物种年复一年地被一种不同基因的寄生虫感染。我们在自然生态系统中的观察表明，尽管形成水华的甲藻可能逃脱捕食生物的控制，但它们最终会屈服于寄生虫的攻击。
The marine dinoflagellates commonly responsible for toxic red tides are parasitized by other dinoflagellate species. Using culture- independent environmental ribosomal RNA sequences and fluorescence markers, we identified host- specific infections among several species. Each parasitoid produces 60 to 400 offspring, leading to extraordinarily rapid control of the host's population. During 3 consecutive years of observation in a natural estuary, all dinoflagellates observed were chronically infected, and a given host species was infected by a single genetically distinct parasite year after year. Our observations in natural ecosystems suggest that although bloom- forming dinoflagellates may escape control by grazing organisms, they eventually succumb to parasite attack.