Abstract The climate around the Western Antarctic Peninsula (WAP) is rapidly changing and dramatically affecting marine coastal waters. Increases in air and seawater temperatures, not matter how small, can alter coastal biological communities due to both temperature increases as well as salinity reduction from glacier melting. The aim of this study was to evaluate the individual and combined effects of elevated sea surface temperature (+4 °C) and decreased salinity (−4) on growth and assemblage composition of natural summer phytoplankton from Potter Cove (King George Island, South Shetlands, northern WAP), using an outdoor microcosm experiment. Pigment composition was analyzed by high performance liquid chromatography (HPLC/Chemtax) and species composition by light and electron microscopy. Increases in phytoplankton biomass during the first 3 days at elevated-temperatures coincided with an increase in the abundance and the specific growth rate of small centric diatoms (Chaetoceros socialis and Shionodiscus gaarderae, mostly observed in temperate waters) and unidentified small phytoflagellates

中文翻译：

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南极天然浮游植物组合对温度和盐度变化的响应

摘要 南极半岛西部 (WAP) 周围的气候正在迅速变化并严重影响沿海海域。由于温度升高以及冰川融化导致盐度降低，空气和海水温度的升高，无论多小，都会改变沿海生物群落。本研究的目的是评估海面温度升高 (+4 °C) 和盐度降低 (-4) 对波特湾（南设得兰群岛乔治国王岛）自然夏季浮游植物的生长和组合组成的单独和综合影响。 , 北部 WAP)，使用室外缩影实验。通过高效液相色谱 (HPLC/Chemtax) 分析颜料组成，通过光学和电子显微镜分析物种组成。