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首页> 外文期刊>Polar biology >Detection of the phycotoxin pectenotoxin-2 in waters around King George Island, Antarctica
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Detection of the phycotoxin pectenotoxin-2 in waters around King George Island, Antarctica

机译：南极乔治王岛周围水域中植物毒素phenenotoxin-2的检测

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In order to set a base line for the observation of planktonic community changes due to global change, protistan plankton sampling in combination with phycotoxin measurements and solid phase adsorption toxin tracking (SPATT) was performed in two bays of King George Island (KGI) in January 2013 and 2014. In addition, SPATT sampling was performed in Potter Cove during a one-year period from January 2014 until January 2015. Known toxigenic taxa were not firmly identified in plankton samples but there was microscopical evidence for background level presence of Dinophysis spp. in the area. This was consistent with environmental conditions during the sampling periods, especially strong mixing of the water column and low water temperatures that do not favor dinoflagellate proliferations. Due to the lack of significant abundance of thecate toxigenic dinoflagellate species in microplankton samples, no phycotoxins were found in net tow samples. In contrast, SPATT sampling revealed the presence of dissolved pectenotoxin-2 (PTX-2) and its hydrolyzed form PTX-2 seco acid in both bays and during the entire one-year sampling period. The presence of dissolved PTX in coastal waters of KGI is strong new evidence for the presence of PTX-producing species, i.e., dinoflagellates of the genus Dinophysis in the area. The presence of phycotoxins and their respective producers, even at the low background concentrations found in this study, may be the seed of possible proliferations of these species under changing environmental conditions. Furthermore, phycotoxins can be used as chemotaxonomic markers for a very specific group of plankton thus allowing to track the presence of this group over time.
机译：为了为观察全球变化引起的浮游生物群落变化确定基线，一月份在乔治王岛（KGI）的两个海湾进行了原生藻浮游生物采样与藻毒素测定和固相吸附毒素追踪（SPATT）的结合2013年和2014年。此外，在2014年1月至2015年1月的一年期间，在波特湖进行了SPATT采样。浮游生物样品中未明确鉴定出已知的产毒素类群，但有微观证据显示Dinophysis spp的背景水平存在。在那地区。这与采样期间的环境条件相符，尤其是水柱的强烈混合以及不利于鞭毛藻增殖的低水温。由于在浮游生物样品中缺乏大量的产毒素的鞭毛藻物种，因此在净丝束样品中未发现任何藻毒素。相比之下，SPATT采样显示在两个海湾和整个一年的采样期内均存在溶解的果胶毒素2（PTX-2）及其水解形式的PTX-2癸二酸。在凯基证券交易所（KGI）沿海水域中存在溶解的PTX，是存在PTX的物种，即该地区恐龙生物的鞭毛鞭毛的有力新证据。即使在这项研究中发现的背景浓度很低，藻毒素和它们各自的生产者的存在也可能是这些物种在不断变化的环境条件下可能繁殖的种子。此外，藻毒素可以用作非常特定的浮游生物组的化学分类标记，因此可以随时间追踪该组的存在。

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