Hundred Years of Environmental Change and Phytoplankton Ecophysiological Variability Archived in Coastal Sediments
Marine protist species have been used for several decades as environmental indicators under the assumption that their ecological requirements have remained more or less stable through time. However, a growing body of evidence suggests that marine protists, including several phytoplankton species, ar...
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ftpubmed:oai:pubmedcentral.nih.gov:3623915 2023-05-15T17:35:50+02:00 Hundred Years of Environmental Change and Phytoplankton Ecophysiological Variability Archived in Coastal Sediments Ribeiro, Sofia Berge, Terje Lundholm, Nina Ellegaard, Marianne 2013-04-11 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3623915 http://www.ncbi.nlm.nih.gov/pubmed/23593424 https://doi.org/10.1371/journal.pone.0061184 en eng Public Library of Science http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3623915 http://www.ncbi.nlm.nih.gov/pubmed/23593424 http://dx.doi.org/10.1371/journal.pone.0061184 This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. CC-BY Research Article Text 2013 ftpubmed https://doi.org/10.1371/journal.pone.0061184 2013-09-04T22:22:30Z Marine protist species have been used for several decades as environmental indicators under the assumption that their ecological requirements have remained more or less stable through time. However, a growing body of evidence suggests that marine protists, including several phytoplankton species, are in fact highly diverse and may quickly respond to changes in the environment. Predicting how future climate will impact phytoplankton populations is important, but this task has been challenged by a lack of time-series of ecophysiological parameters at time-scales relevant for climate studies (i.e. at least decadal). Here, we report on ecophysiological variability in a marine dinoflagellate over a 100-year period of well-documented environmental change, by using the sedimentary archive of living cysts from a Scandinavian fjord (Koljö Fjord, Sweden). During the past century, Koljö Fjord has experienced important changes in salinity linked to the North Atlantic Oscillation (NAO). We revived resting cysts of Pentapharsodinium dalei preserved in the fjord sediments and determined growth rates for 18 strains obtained from 3 sediment core layers at salinity 15 and 30, which represent extreme sea-surface conditions during periods of predominantly negative and positive NAO phases, respectively. Upper pH tolerance limits for growth were also tested. In general, P. dalei grew at a higher rate in salinity 30 than 15 for all layers, but there were significant differences among strains. When accounting for inter-strain variability, cyst age had no effect on growth performance or upper pH tolerance limits for this species, indicating a stable growth response over the 100-year period in spite of environmental fluctuations. Our findings give some support for the use of morphospecies in environmental studies, particularly at decadal to century scales. Furthermore, the high intra-specific variability found down to sediment layers dated as ca. 50 years-old indicates that cyst-beds of P. dalei are repositories of ecophysiological ... Text North Atlantic North Atlantic oscillation PubMed Central (PMC) PLoS ONE 8 4 e61184 |
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Research Article Ribeiro, Sofia Berge, Terje Lundholm, Nina Ellegaard, Marianne Hundred Years of Environmental Change and Phytoplankton Ecophysiological Variability Archived in Coastal Sediments |
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description |
Marine protist species have been used for several decades as environmental indicators under the assumption that their ecological requirements have remained more or less stable through time. However, a growing body of evidence suggests that marine protists, including several phytoplankton species, are in fact highly diverse and may quickly respond to changes in the environment. Predicting how future climate will impact phytoplankton populations is important, but this task has been challenged by a lack of time-series of ecophysiological parameters at time-scales relevant for climate studies (i.e. at least decadal). Here, we report on ecophysiological variability in a marine dinoflagellate over a 100-year period of well-documented environmental change, by using the sedimentary archive of living cysts from a Scandinavian fjord (Koljö Fjord, Sweden). During the past century, Koljö Fjord has experienced important changes in salinity linked to the North Atlantic Oscillation (NAO). We revived resting cysts of Pentapharsodinium dalei preserved in the fjord sediments and determined growth rates for 18 strains obtained from 3 sediment core layers at salinity 15 and 30, which represent extreme sea-surface conditions during periods of predominantly negative and positive NAO phases, respectively. Upper pH tolerance limits for growth were also tested. In general, P. dalei grew at a higher rate in salinity 30 than 15 for all layers, but there were significant differences among strains. When accounting for inter-strain variability, cyst age had no effect on growth performance or upper pH tolerance limits for this species, indicating a stable growth response over the 100-year period in spite of environmental fluctuations. Our findings give some support for the use of morphospecies in environmental studies, particularly at decadal to century scales. Furthermore, the high intra-specific variability found down to sediment layers dated as ca. 50 years-old indicates that cyst-beds of P. dalei are repositories of ecophysiological ... |
format |
Text |
author |
Ribeiro, Sofia Berge, Terje Lundholm, Nina Ellegaard, Marianne |
author_facet |
Ribeiro, Sofia Berge, Terje Lundholm, Nina Ellegaard, Marianne |
author_sort |
Ribeiro, Sofia |
title |
Hundred Years of Environmental Change and Phytoplankton Ecophysiological Variability Archived in Coastal Sediments |
title_short |
Hundred Years of Environmental Change and Phytoplankton Ecophysiological Variability Archived in Coastal Sediments |
title_full |
Hundred Years of Environmental Change and Phytoplankton Ecophysiological Variability Archived in Coastal Sediments |
title_fullStr |
Hundred Years of Environmental Change and Phytoplankton Ecophysiological Variability Archived in Coastal Sediments |
title_full_unstemmed |
Hundred Years of Environmental Change and Phytoplankton Ecophysiological Variability Archived in Coastal Sediments |
title_sort |
hundred years of environmental change and phytoplankton ecophysiological variability archived in coastal sediments |
publisher |
Public Library of Science |
publishDate |
2013 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3623915 http://www.ncbi.nlm.nih.gov/pubmed/23593424 https://doi.org/10.1371/journal.pone.0061184 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3623915 http://www.ncbi.nlm.nih.gov/pubmed/23593424 http://dx.doi.org/10.1371/journal.pone.0061184 |
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This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1371/journal.pone.0061184 |
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4 |
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e61184 |
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