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Phototoxicity of pyrene affects benthic algae and bacteria from the arctic

Petersen, Dorthe G; Reichenberg, Fredrik LU and Dahllöf, Ingela (2008) In Environmental Science & Technology 42(4). p.1371-1376
Abstract
Phototoxicity of polycyclic aromatic hydrocarbons (PAHs) in the Arctic is important to study since the future PAH load is likely to increase. In combination with the increased UV-Iight penetration due to ozone layer thinning, phototoxicity may be a potential problem for arctic areas. The aim of this study was to evaluate effects of pyrene and phototoxicity of pyrene on natural algae and bacteria from. arctic sediments. Sediments from a shallow-water marine bay were spiked with different pyrene concentrations. Microcosms containing the sediment were incubated under three light regimes, natural sunlight with UV-light, natural sunlight without W-light, and dark. Significant effects were evident at low pyrene concentrations, particularly in... (More)
Phototoxicity of polycyclic aromatic hydrocarbons (PAHs) in the Arctic is important to study since the future PAH load is likely to increase. In combination with the increased UV-Iight penetration due to ozone layer thinning, phototoxicity may be a potential problem for arctic areas. The aim of this study was to evaluate effects of pyrene and phototoxicity of pyrene on natural algae and bacteria from. arctic sediments. Sediments from a shallow-water marine bay were spiked with different pyrene concentrations. Microcosms containing the sediment were incubated under three light regimes, natural sunlight with UV-light, natural sunlight without W-light, and dark. Significant effects were evident at low pyrene concentrations, particularly in presence of W-light, indicating phototoxicity. The microalgae were especially sensitive to the phototoxicity of pyrene. Already at the lowest pyrene concentration (C-free: 4 nM) algal C-14-incorporation and chlorophyll a content were reduced. The toxic effects of pyrene on the microalgae probably led to the release of organic matter. In agreement with this, bacterial activity increased at high pyrene concentrations indicated by increased oxygen consumption and increased release of inorganic N and P from the sediment. This study indicates that phototoxicity of PAHs may be relevant for sediment communities from shallow marine arctic areas at environmentally relevant pyrene concentrations. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Environmental Science & Technology
volume
42
issue
4
pages
1371 - 1376
publisher
The American Chemical Society
external identifiers
  • wos:000253250800066
  • scopus:39649119290
ISSN
1520-5851
DOI
10.1021/es071854n
language
English
LU publication?
yes
id
634132c5-13c2-4298-aa4e-b6f3be1bc388 (old id 1196912)
date added to LUP
2008-09-10 12:27:35
date last changed
2017-10-01 03:59:58
@article{634132c5-13c2-4298-aa4e-b6f3be1bc388,
  abstract     = {Phototoxicity of polycyclic aromatic hydrocarbons (PAHs) in the Arctic is important to study since the future PAH load is likely to increase. In combination with the increased UV-Iight penetration due to ozone layer thinning, phototoxicity may be a potential problem for arctic areas. The aim of this study was to evaluate effects of pyrene and phototoxicity of pyrene on natural algae and bacteria from. arctic sediments. Sediments from a shallow-water marine bay were spiked with different pyrene concentrations. Microcosms containing the sediment were incubated under three light regimes, natural sunlight with UV-light, natural sunlight without W-light, and dark. Significant effects were evident at low pyrene concentrations, particularly in presence of W-light, indicating phototoxicity. The microalgae were especially sensitive to the phototoxicity of pyrene. Already at the lowest pyrene concentration (C-free: 4 nM) algal C-14-incorporation and chlorophyll a content were reduced. The toxic effects of pyrene on the microalgae probably led to the release of organic matter. In agreement with this, bacterial activity increased at high pyrene concentrations indicated by increased oxygen consumption and increased release of inorganic N and P from the sediment. This study indicates that phototoxicity of PAHs may be relevant for sediment communities from shallow marine arctic areas at environmentally relevant pyrene concentrations.},
  author       = {Petersen, Dorthe G and Reichenberg, Fredrik and Dahllöf, Ingela},
  issn         = {1520-5851},
  language     = {eng},
  number       = {4},
  pages        = {1371--1376},
  publisher    = {The American Chemical Society},
  series       = {Environmental Science & Technology},
  title        = {Phototoxicity of pyrene affects benthic algae and bacteria from the arctic},
  url          = {http://dx.doi.org/10.1021/es071854n},
  volume       = {42},
  year         = {2008},
}