Department of Global Change Research, IMEDEA (CSIC-UIB) Instituto Mediterráneo de Estudios Avanzados, Miquel Marqués 21, 07190 Esporles, Spain.
Environ Pollut. 2010 Jan;158(1):299-307. doi: 10.1016/j.envpol.2009.07.006. Epub 2009 Jul 23.
The toxicity of pyrene and phenanthrene to phytoplankton was studied by analyzing the effect on the growth, abundance and cell viability of cultured species and natural communities of the Atlantic Ocean and the Mediterranean Sea. A decrease in cell abundance, and growth rate was observed as concentration of PAHs increased, with catastrophic cell mortality induced at the highest PAH concentration tested. A strong positive linear relationship was observed between the LC50 (the PAH concentration at which cell population will decline by a half), and the species cell volume, for both phenanthrene and pyrene. Natural communities were however significantly more sensitive to PAHs than cultured phytoplankton, as indicated by the lower slope (e.g. 0.23 and 0.65, respectively, for pyrene) of the relationship LC50 vs. cell volume. The results highlight the importance of cell size in determining the phytoplankton sensitivity to PAHs identifying the communities from the oligotrophic ocean to be more vulnerable.
研究了芘和菲对浮游植物的毒性，分析了它们对大西洋和地中海培养物种和自然群落的生长、丰度和细胞活力的影响。随着多环芳烃浓度的增加，细胞丰度和生长率下降，在最高测试的多环芳烃浓度下，细胞死亡率急剧增加。观察到 LC50（细胞数量减少一半的多环芳烃浓度）与物种细胞体积之间存在很强的正线性关系，对于菲和芘都是如此。然而，与培养的浮游植物相比，自然群落对多环芳烃的敏感性显著更高，这反映在 LC50 与细胞体积的关系中斜率较低（例如，芘分别为 0.23 和 0.65）。研究结果强调了细胞大小在确定浮游植物对多环芳烃的敏感性方面的重要性，确定了贫营养海洋中的群落更容易受到影响。
