期刊
ENVIRONMENTAL POLLUTION
卷 159, 期 5, 页码 1307-1316出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2011.01.023
关键词
Phytoplankton; Polycyclic aromatic hydrocarbons; Synergy; Cell size; UV radiation
资金
- Conselleria d'Economia, Hisenda i Innovacio del Govern de les Illes Balears
- Spanish Ministry of Science and Innovation [CTM2004-06842-C03-02/MAR, POL2006-00550/CTM]
Polycyclic Aromatic Hydrocarbons' (PAHs) toxicity is enhanced by the presence of ultraviolet radiation (UVR), which levels have arisen due to the thinning of the ozone layer. In this study. PAHs' phototoxicity for natural marine phytoplankton was tested. Different concentrations of a mixture of 16 PAHs were added to natural phytoplankton communities from the Mediterranean Sea, Atlantic, Arctic and Southern Oceans and exposed to natural sunlight received in situ, including treatments where the UVR bands were removed. PAHs' toxicity was observed for all the phytoplankton groups studied in all the waters and treatments tested, but only for the pico-sized group a synergetic effect of the mixture and UVR was observed (p = 0.009). When comparing phototoxicity in phytoplankton from oligotrophic and eutrophic waters, synergy was only observed at the oligotrophic communities (p = 0.02) where pico-sized phytoplankton dominated. The degree of sensitivity was related to the trophic degree, decreasing as Chlorophyll a concentration increased. (C) 2011 Elsevier Ltd. All rights reserved.
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