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Structural and functional responses of coastal marine phytoplankton communities to PAH mixtures
- Source :
- Chemosphere, Chemosphere, Elsevier, 2018, 209, pp.908-919. ⟨10.1016/j.chemosphere.2018.06.153⟩, Chemosphere (0045-6535) (Pergamon-elsevier Science Ltd), 2018-10, Vol. 209, P. 908-919
- Publication Year :
- 2018
-
Abstract
- The toxicity of polycyclic aromatic hydrocarbons (PAHs) mixtures was evaluated on natural phytoplankton communities sampled from lagoons of Bizerte (South-western Mediterranean Sea) and Thau (North-western Mediterranean Sea). PAHs induced short-term dose and ecosystem-dependant decreases in photosynthetic potential. Chlorophyll a was negatively affected by increasing PAHs concentrations, together with dramatic changes in phytoplankton community composition. Size classes were strongly affected in the Bizerte compare to the Thau lagoon, with a decrease in nano- and microphytoplankton densities compare to picophytoplankton. In both locations, the diatom Entomoneis paludosa appeared favoured under PAH exposure as evidenced by increase in cell density, whereas autotrophic flagellates and dinophytes were strongly reduced. Smaller cells were more tolerant to exposure to highest PAHs concentrations, with persistent picophytoplankton carbon biomass at the end of the incubations. Apparent recovery of photosynthetic potential, accompanied with a regrowth of chlorophyll a under the lowest PAH doses, coincided with a significantly altered community composition in both lagoons. Furthermore, sensitivity to PAHs was not related to the phytoplankton cell size, and toxicity-induced modification of top-down control by grazers during the experiment cannot be excluded. (C) 2018 Elsevier Ltd. All rights reserved.
- Subjects :
- 0106 biological sciences
Chlorophyll a
Environmental Engineering
Health, Toxicology and Mutagenesis
[SDV]Life Sciences [q-bio]
010501 environmental sciences
01 natural sciences
chemistry.chemical_compound
Mediterranean sea
Aquatic plant
Phytoplankton
Environmental Chemistry
PAH mixtures (PAHs)
14. Life underwater
Ecotoxicity
Polycyclic Aromatic Hydrocarbons
0105 earth and related environmental sciences
Phytoplankton communities
Biomass (ecology)
biology
010604 marine biology & hydrobiology
Mediterranean coastal lagoons
Public Health, Environmental and Occupational Health
General Medicine
General Chemistry
15. Life on land
Plankton
biology.organism_classification
Pollution
Diatom
chemistry
13. Climate action
Environmental chemistry
Chlorophyll
[SDE]Environmental Sciences
Subjects
Details
- ISSN :
- 18791298 and 00456535
- Volume :
- 209
- Database :
- OpenAIRE
- Journal :
- Chemosphere
- Accession number :
- edsair.doi.dedup.....1a3c98d4ea24fdfa243d09384bba7dd9