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Chemical composition of phytoplankton from the estuaries of Eastern Amazonia

机译：东部亚马逊河口浮游植物的化学成分

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Phytoplankton is important bioindicator of chemical and biological modifications of natural ecosystems. The objective of this study was to determine the total chemical composition of the phytoplankton of the Pará and Mocajuba estuaries on the eastern coast of the Amazon region in the Brazilian state of Pará. The chemical composition of the surface water, bottom sediments (total sample and bioavailable fraction), and the phytoplankton were determined by inductively coupled plasma optical emission spectrometry. Phytoplankton contained high concentrations of Ca, P, Mn, Fe, Zn, Al, Ba, and Pb. The phytoplankton of the Mocajuba estuary is rich in Fe (2,967-84,750 μg g-1), while those from the Pará is rich in Al (1,216-15,389 μgg-1), probably reflecting divergent anthropogenic inputs. Both samples indicated a high bioconcentration factor derived from both the water and the bioavailable fraction, reflecting the efficiency of these organisms in the concentration of metals.
机译：浮游植物是自然生态系统化学和生物修饰的重要生物指示剂。这项研究的目的是确定巴西帕拉州亚马逊地区东海岸的帕拉河和莫卡朱巴河口浮游植物的总化学成分。通过电感耦合等离子体发射光谱法确定了地表水，底部沉积物（总样品和生物可利用部分）和浮游植物的化学成分。浮游植物含有高浓度的Ca，P，Mn，Fe，Zn，Al，Ba和Pb。 Mocajuba河口的浮游植物富含铁（2,967-84,750μgg-1），而帕拉州的浮游植物富含Al（1,216-15,389μgg-1），可能反映了不同的人为输入。两种样品均表明来自水和生物利用度的生物富集系数高，反映了这些生物在金属浓度方面的效率。

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