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首页> 外文期刊>Polar biology >Phytoplankton structure and dynamics in a volcanic lake in Deception Island (South Shetland Islands, Antarctica)
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Phytoplankton structure and dynamics in a volcanic lake in Deception Island (South Shetland Islands, Antarctica)

机译：欺骗岛（南设得兰群岛，南极洲）的火山湖中的浮游植物结构和动力学

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摘要

This work constitutes the first floristic and ecological analysis of the phytoplankton community of a volcanic freshwater lake in Deception Island (62°57′S, 60°38′W, South Shetland Islands, Antarctica). The main limnological features and phytoplankton size fractions were analyzed. Samples were taken during the austral summer of 2002 at two opposite sites. According to ANOVA results performed with abiotic variables, no significant differences between sites were found. The phytoplankton community showed low algal species richness, with an important contribution of the tychoplanktonic taxa. In terms of species number, Bacillariophyceae was the dominant class. Autotrophic picoplankton registered the highest densities from the second sampling date onwards. Nanophytoplankton was represented by unidentified chrysophycean organisms, which showed different distribution patterns between sites. The net phytoplankton abundance remained low during the sampling period and was strongly correlated with chlorophyll a concentration. Both nutrient concentrations and chlorophyll a values indicated oligotrophic conditions.
机译：这项工作是对欺骗岛（62°57′S，60°38′W，南设得兰群岛，南极洲）的一个火山淡水湖浮游植物群落的首次植物学和生态学分析。分析了主要的湖泊学特征和浮游植物的大小分数。在2002年南半球的两个相对地点采集了样品。根据使用非生物变量进行的方差分析结果，未发现位点之间的显着差异。浮游植物群落显示藻类丰富度低，对浮游类群有重要贡献。就物种数量而言，芽孢杆菌科是优势种。自第二次采样以来，自养微微浮游生物的密度最高。纳米浮游植物以未鉴定的金藻藻生物为代表，在站点之间表现出不同的分布方式。在采样期间，浮游植物的净丰度保持较低水平，并且与叶绿素a浓度密切相关。营养物浓度和叶绿素a值均指示贫营养状况。

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