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Microplastics do not affect standard ecotoxicological endpoints in marine unicellular organisms
- Source :
- Repositório Científico de Acesso Aberto de Portugal, Repositório Científico de Acesso Aberto de Portugal (RCAAP), instacron:RCAAP
- Publication Year :
- 2019
- Publisher :
- Elsevier BV, 2019.
-
Abstract
- In this study, the acute toxicity of microplastics (MPs) on unicellular organisms as marine decomposers and microalgae was assessed, by evaluating standards endpoints included in International Standard Organization (ISO) protocols. The bacteria Vibrio fischeri and the diatom Phaeodactylum tricornutum were exposed to different sizes (1–500 μm) of polyethylene MPs in order to evaluate bioluminescence inhibition and microalgal growth. No acute toxicity was found on bacteria or microalgae in an order of magnitude above environmentally relevant concentrations, suggesting that tested MPs did not affect the investigated biological processes. In conclusion, standard ecotoxicological endpoints are not sufficiently sensitive to assess the potential effects of MPs on decomposers and primary producers, conversely to nanoplastics. These findings highlight that the current approach for MP risk assessment in unicellular species should be revised, by providing alternative endpoints to be included in standardized protocols, able to monitor the fate and biological effects of MPs.<br />Sí
- Subjects :
- 0106 biological sciences
Microplastics
Marine litter
Medio Marino y Protección Ambiental
010501 environmental sciences
Aquatic Science
Oceanography
Ecotoxicology
01 natural sciences
Decomposer
Water pollutants
Toxicity Tests, Acute
Microalgae
Bioluminescence
Centro Oceanográfico de Murcia
Phaeodactylum tricornutum
0105 earth and related environmental sciences
Diatoms
biology
Primary producers
Bacteria
010604 marine biology & hydrobiology
Decomposers
biology.organism_classification
Pollution
Aliivibrio fischeri
Vibrio
Acute toxicity
Diatom
13. Climate action
Growth inhibition
Polyethylene
Environmental chemistry
Toxicity tests
Water Pollutants, Chemical
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Repositório Científico de Acesso Aberto de Portugal, Repositório Científico de Acesso Aberto de Portugal (RCAAP), instacron:RCAAP
- Accession number :
- edsair.doi.dedup.....fb28e99af67460c634063e4caf5e319e