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首页> 外文期刊>International Journal of Environmental Research and Public Health >First Report of a Toxic Nodularia spumigena (Nostocales/ Cyanobacteria) Bloom in Sub-Tropical Australia. I. Phycological and Public Health Investigations
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First Report of a Toxic Nodularia spumigena (Nostocales/ Cyanobacteria) Bloom in Sub-Tropical Australia. I. Phycological and Public Health Investigations

机译：亚热带澳大利亚有毒的结节性海绵状结节藻（Nostocales /蓝细菌）开花的首次报道。一，植物学和公共卫生调查

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摘要

Cyanobacterial blooms represent one of the most conspicuous and widespread waterborne microbial hazards to human and ecosystem health. Investigation of a cyanobacterial bloom in a shallow brackish water recreational cable ski lake in south-eastern Queensland, Australia revealed the dominance of the toxigenic species Nodularia spumigena. The bloom spanned three months, during which time cell concentrations exceeded human guideline thresholds for recreational risk, and concentrations of the hepatotoxic cyanotoxin nodularin exceeded 200 μg L?1. Cyanotoxin origin and identification was confirmed by amplification of the ndaF-specific PCR product and sequencing of the 16S rRNA gene. From the limited data available leading up to, and throughout the bloom, it was not possible to establish the set of causative factors responsible for its occurrence. However a combination of factors including salinity, hydraulic retention time and nutrient status associated with an extended period of drought are likely to have contributed. This was the first known occurrence of this species in bloom proportions from sub-tropical Australia and as such represents a hitherto uncharacterized risk to human and ecosystem health. It highlights the need for adaptive monitoring regimes to ensure a comprehensive understanding of the potentially toxic cyanobacteria likely to inhabit any given region. Such monitoring needs to recognize that cyanobacteria have a significant capacity for range expansion that has been facilitated by recent changes in global climate.
机译：蓝藻水华是对人类和生态系统健康的最明显和最广泛的水生微生物危害之一。在澳大利亚昆士兰州东南部的一个浅咸水休闲缆索滑雪湖中进行的蓝藻水华研究表明，产毒物种Nodularia spumigena占主导地位。水华持续了三个月，在此期间，细胞浓度超过了有关娱乐风险的人类指导阈值，肝毒性氰毒素结核菌素的浓度超过200μgL？1。通过放大ndaF特异性PCR产物和对16S rRNA基因进行测序，确认了氰毒素的起源和鉴定。从开始到整个开花期间的有限数据，不可能确定导致其发生的一系列致病因素。但是，与盐分，水力滞留时间和长期干旱相关的养分状况等多种因素的综合影响很可能是造成这种情况的原因。这是该物种首次在亚热带澳大利亚以开花比例出现，因此对人类和生态系统健康具有前所未有的危险。它强调需要采取自适应监测制度，以确保对可能居住在任何给定区域的潜在有毒蓝细菌的全面了解。这种监测需要认识到，蓝细菌具有扩大范围的巨大能力，而全球气候的最新变化促进了这种能力。

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