Diversity and distribution of cyanobacterial toxins in the Italian subalpine lacustrine district
Diversity and distribution of cyanobacterial toxins in the Italian subalpine lacustrine district
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DOI：
10.2478/s13545-012-0028-9
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发表时间：
2012-09-01
影响因子：
0.9
通讯作者：
Salmaso, Nico
中科院分区：
文献类型：
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作者：
Cerasino, Leonardo;Salmaso, Nico
九个湖泊（加尔达，马焦雷，科莫，伊塞奥，卢加诺，伊德罗，Pusiano，莱德罗，和Levico）位于意大利亚高山湖泊区的蓝藻毒素的多样性和分布进行了比较研究。已知所有九个湖泊都有不同的有毒蓝藻，主要是浮游发藻。一个分析协议已被使用，基于LC-MS技术，用于确定20种不同的毒素（14微囊藻毒素，2节藻毒素，类毒素-a和3 cylindrospermopsin）。在调查中，微囊藻毒素发现在所有湖泊的所有采样日期。在6个湖泊中检测到类毒素-a，但在所有采样日期仅在4个湖泊（加尔达湖、伊塞奥湖、科莫湖和马焦雷湖）中检出。结球蛋白和柱孢菌素没有检测到。在调查中检测到的微囊藻毒素的数量是9，但4个是最丰富的（dmRR，YR，dmLR和LR），它们在湖泊中的分布不同，从而为每个湖泊提供了独特的毒性潜力。统计分析表明，总微囊藻毒素浓度和富营养化指标之间的正相关性，也类毒素-a浓度和水温之间，这表明，人类和气候相关的压力可以有不同的影响不同的蓝藻毒素的存在。
Nine lakes (Garda, Maggiore, Como, Iseo, Lugano, Idro, Pusiano, Ledro, and Levico) located in the Italian subalpine lacustrine district were chosen for a comparative study of the diversity and distribution of cyanobacterial toxins. All nine lakes are known to host different toxic cyanobacteria, mainly Planktothrix rubescens. An analytical protocol has been used, based on LC-MS technique, for determining 20 different toxins (14 microcystins, 2 nodularins, anatoxin-a and 3 cylindrospermopsins). In the investigation, microcystins were found in all lakes on all sampling dates. Anatoxin-a could be detected in 6 lakes, but it was only present in 4 lakes on all sampling dates (lakes Garda, Iseo, Como, and Maggiore). Nodularins and cylindrospermopsins were not detected at all. The number of microcystins detected in the survey was 9, but 4 were the most abundant (dmRR, YR, dmLR, and LR); they were differently distributed among the lakes, thus providing each lake a unique toxic potential. Statistical analysis showed positive correlations between total microcystin concentrations and eutrophication indicators and also between anatoxin-a concentrations and water temperature, suggesting that anthropic and climate-related stressors can have different impacts on the presence of different cyanotoxins.