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首页> 外文期刊>Environmental toxicology and chemistry >Occurrence of Toxigenic Microalgal Species and Phycotoxin Accumulation in Mesozooplankton in Northern Patagonian Gulfs, Argentina
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Occurrence of Toxigenic Microalgal Species and Phycotoxin Accumulation in Mesozooplankton in Northern Patagonian Gulfs, Argentina

机译：阿根廷巴塔哥尼亚海湾北部中游浮游生物的产毒微藻物种和植物毒素的积累

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摘要

In the Northern Patagonian gulfs of Argentina (Golfo Nuevo and Golfo San Jose), blooms of toxigenic microalgae and the detection of their associated phycotoxins are recurrent phenomena. The present study evaluated the transfer of phycotoxins from toxigenic microalgae to mesozooplankton in Golfo Nuevo and Golfo San Jose throughout an annual cycle (December 2014-2015 and January 2015-2016, respectively). In addition, solid-phase adsorption toxin tracking (SPATT) samplers were deployed for the first time in these gulfs, to estimate the occurrence of phycotoxins in the seawater between the phytoplankton samplings. Domoic acid was present throughout the annual cycle in SPATT samplers, whereas no paralytic shellfish poisoning toxins were detected. Ten toxigenic species were identified: Alexandrium catenella, Dinophysis acuminata, Dinophysis acuta, Dinophysis tripos, Dinophysis caudata, Prorocentrum lima, Pseudo-nitzschia australis, Pseudo-nitzschia calliantha, Pseudo-nitzschia fraudulenta, and Pseudo-nitzschia pungens. Lipophilic and hydrophilic toxins were detected in phytoplankton and mesozooplankton from both gulfs. Pseudo-nitzschia spp. were the toxigenic species most frequent in these gulfs. Consequently, domoic acid was the phycotoxin most abundantly detected and transferred to upper trophic levels. Spirolides were detected in phytoplankton and mesozooplankton for the first time in the study area. Likewise, dinophysistoxins were found in mesozooplankton from both gulfs, and this is the first report of the presence of these phycotoxins in zooplankton from the Argentine Sea. The dominance of calanoid copepods indicates that they were the primary vector of phycotoxins in the pelagic trophic web. Environ Toxicol Chem 2019;00:1-15. (c) 2019 SETAC
机译：在阿根廷的北巴塔哥尼亚海湾（Golfo Nuevo和Golfo San Jose），有毒的微藻大量繁殖及其相关的藻毒素的检测是经常出现的现象。本研究评估了在整个年度周期（分别为2014-2015年12月和2015年1月-2016年）中，Golfo Nuevo和Golfo San Jose的毒素从藻类微藻向中游浮游动物的转移。此外，首次在这些海湾中部署了固相吸附毒素追踪（SPATT）采样器，以估计浮游植物采样之间海水中细菌毒素的发生。在SPATT采样器的整个年度周期中都存在海藻酸，而没有发现麻痹性贝类中毒毒素。鉴定出十种产毒物种：亚历山大毛线虫，尖锐线虫，锐角线虫，三齿线虫，龙骨线虫，原中心利马，假拟南芥，伪拟南芥，伪拟南芥和假拟南芥。在两个海湾的浮游植物和中生浮游动物中均检测到亲脂性和亲水性毒素。拟南芥属。是这些海湾中最常见的产毒物种。因此，海藻酸是最被检测到并转移到较高营养水平的植物毒素。在研究区域内首次在浮游植物和中游浮游动物中发现了螺旋藻。同样，在两个海湾的中型浮游动物中都发现了恐龙生物毒素，这是来自阿根廷海的浮游动物中这些藻毒素的首次报道。 cal足类pe足类动物的优势表明它们是上层营养网中藻毒素的主要载体。 Environ Toxicol Chem 2019; 00：1-15。 （c）2019年SETAC

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