Experimental evidence for species-specific adherence of nanoplastic particles in Arctic phytoplankton communities
Plastic debris are ubiquitous, and the Arctic is no exception. Despite the relatively low population number around the Arctic, abundances of microplastic litter are like those of the most polluted subtropical areas. Micro- and nanoplastics have been found in Arctic fauna, but due to constraints in m...
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ftunivtroemsoe:oai:munin.uit.no:10037/27905 2023-05-15T14:36:55+02:00 Experimental evidence for species-specific adherence of nanoplastic particles in Arctic phytoplankton communities Miettinen, Anna 2022-11-15 https://hdl.handle.net/10037/27905 eng eng UiT Norges arktiske universitet UiT The Arctic University of Norway https://hdl.handle.net/10037/27905 openAccess Copyright 2022 The Author(s) BIO-3950 Master thesis Mastergradsoppgave 2022 ftunivtroemsoe 2022-12-22T00:02:49Z Plastic debris are ubiquitous, and the Arctic is no exception. Despite the relatively low population number around the Arctic, abundances of microplastic litter are like those of the most polluted subtropical areas. Micro- and nanoplastics have been found in Arctic fauna, but due to constraints in methodology, measurements of nanoplastics in sea water have not been carried out yet. Micro- and nanoplastic toxicity tests have recently executed in phytoplankton single species but no literature exists of Arctic taxa, and there is little knowledge how complex communities respond to nanoplastic exposure. To bridge these knowledge gaps, this thesis carried out two experiments, where 1) two sub-Arctic diatoms (Chaetoceros gelidus and Thalassiosira gravida) were chronically exposed to polystyrene nanoplastics over the course of their exponential and stationary phases, testing for growth and biochemical responses and 2) Arctic phytoplankton communities from the Barents Sea Polar Front were incubated with polystyrene nanoplastics for 3 h. It was assumed that, because some species, such as C. gelidus produce high concentrations of sticky transparent exopolymer particles (TEP), that they would have the highest levels of adherence in both experiments. The single species study did not yield any results. Phytoplankton community experiment proved species-specific adherence of nanoplastics, however, contradictory to our hypotheses, presence of TEP may not be the determining factor in adherence. We suggest that, because of the species-specific adherence, there may be a seasonal cycle in adherence related to the seasonality of phytoplankton taxa. These results prove that in the future, natural community experiments must be carried out at an increasing level. Master Thesis Arctic Barents Sea Phytoplankton University of Tromsø: Munin Open Research Archive Arctic Barents Sea |
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Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
BIO-3950 |
spellingShingle |
BIO-3950 Miettinen, Anna Experimental evidence for species-specific adherence of nanoplastic particles in Arctic phytoplankton communities |
topic_facet |
BIO-3950 |
description |
Plastic debris are ubiquitous, and the Arctic is no exception. Despite the relatively low population number around the Arctic, abundances of microplastic litter are like those of the most polluted subtropical areas. Micro- and nanoplastics have been found in Arctic fauna, but due to constraints in methodology, measurements of nanoplastics in sea water have not been carried out yet. Micro- and nanoplastic toxicity tests have recently executed in phytoplankton single species but no literature exists of Arctic taxa, and there is little knowledge how complex communities respond to nanoplastic exposure. To bridge these knowledge gaps, this thesis carried out two experiments, where 1) two sub-Arctic diatoms (Chaetoceros gelidus and Thalassiosira gravida) were chronically exposed to polystyrene nanoplastics over the course of their exponential and stationary phases, testing for growth and biochemical responses and 2) Arctic phytoplankton communities from the Barents Sea Polar Front were incubated with polystyrene nanoplastics for 3 h. It was assumed that, because some species, such as C. gelidus produce high concentrations of sticky transparent exopolymer particles (TEP), that they would have the highest levels of adherence in both experiments. The single species study did not yield any results. Phytoplankton community experiment proved species-specific adherence of nanoplastics, however, contradictory to our hypotheses, presence of TEP may not be the determining factor in adherence. We suggest that, because of the species-specific adherence, there may be a seasonal cycle in adherence related to the seasonality of phytoplankton taxa. These results prove that in the future, natural community experiments must be carried out at an increasing level. |
format |
Master Thesis |
author |
Miettinen, Anna |
author_facet |
Miettinen, Anna |
author_sort |
Miettinen, Anna |
title |
Experimental evidence for species-specific adherence of nanoplastic particles in Arctic phytoplankton communities |
title_short |
Experimental evidence for species-specific adherence of nanoplastic particles in Arctic phytoplankton communities |
title_full |
Experimental evidence for species-specific adherence of nanoplastic particles in Arctic phytoplankton communities |
title_fullStr |
Experimental evidence for species-specific adherence of nanoplastic particles in Arctic phytoplankton communities |
title_full_unstemmed |
Experimental evidence for species-specific adherence of nanoplastic particles in Arctic phytoplankton communities |
title_sort |
experimental evidence for species-specific adherence of nanoplastic particles in arctic phytoplankton communities |
publisher |
UiT Norges arktiske universitet |
publishDate |
2022 |
url |
https://hdl.handle.net/10037/27905 |
geographic |
Arctic Barents Sea |
geographic_facet |
Arctic Barents Sea |
genre |
Arctic Barents Sea Phytoplankton |
genre_facet |
Arctic Barents Sea Phytoplankton |
op_relation |
https://hdl.handle.net/10037/27905 |
op_rights |
openAccess Copyright 2022 The Author(s) |
_version_ |
1766309447223738368 |