Seasonal variation in light response of polar phytoplankton
The seasonality of light response curves was observed in phytoplankton samples taken in the Eastern Bering Sea (EBS) shortly before and during the spring bloom. Under-ice samples were found to have lower values of both the maximum growth rate (μ0) and the initial slope (α) of the photosynthesis-irra...
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ftustrathclyde:oai:strathprints.strath.ac.uk:66450 2024-05-19T07:38:22+00:00 Seasonal variation in light response of polar phytoplankton Sloughter, T.M. Banas, Neil Sambrotto, R.N. 2018-12-06 text https://strathprints.strath.ac.uk/66450/ https://strathprints.strath.ac.uk/66450/1/Sloughter_etal_JMS_2018_Seasonal_variation_in_light_response_of_polar_phytoplankton.pdf https://doi.org/10.1016/j.jmarsys.2018.12.003 en eng https://strathprints.strath.ac.uk/66450/1/Sloughter_etal_JMS_2018_Seasonal_variation_in_light_response_of_polar_phytoplankton.pdf Sloughter, T.M. <https://strathprints.strath.ac.uk/view/author/1055562.html> and Banas, Neil <https://strathprints.strath.ac.uk/view/author/884063.html> and Sambrotto, R.N. (2018 <https://strathprints.strath.ac.uk/view/year/2018.html>) Seasonal variation in light response of polar phytoplankton. Journal of Marine Systems <https://strathprints.strath.ac.uk/view/publications/Journal_of_Marine_Systems.html>. ISSN 0924-7963 cc_by_nc_nd Mathematics Article PeerReviewed 2018 ftustrathclyde https://doi.org/10.1016/j.jmarsys.2018.12.003 2024-05-01T00:02:35Z The seasonality of light response curves was observed in phytoplankton samples taken in the Eastern Bering Sea (EBS) shortly before and during the spring bloom. Under-ice samples were found to have lower values of both the maximum growth rate (μ0) and the initial slope (α) of the photosynthesis-irradiance (PE) curve. This trend in α was also noted in a literature review of photoacclimation studies that looked at acclimation periods of 30 days or more. A trade-off is proposed between α and maintenance respiration such that below the compensation intensity EC it becomes advantageous to decrease α to mitigate the costs of respiration. An existing NPZD model of the EBS was then extended to reflect this trade-off with a seasonal transition from low to high α, and likewise μ0, at the point where available light is greater than EC. A parameter analysis found that with this seasonal plasticity the model could accurately reproduce the timing and magnitude of the 2009 spring bloom using parameter combinations within realistic ranges. Without this seasonality, no parameter set could be found that reasonably reproduced the observations. This strongly suggests that ecosystem models of phytoplankton should consider the effects of seasonality within parameters, including α which may be lower in over-wintering populations. Article in Journal/Newspaper Bering Sea University of Strathclyde Glasgow: Strathprints Journal of Marine Systems 191 64 75 |
institution |
Open Polar |
collection |
University of Strathclyde Glasgow: Strathprints |
op_collection_id |
ftustrathclyde |
language |
English |
topic |
Mathematics |
spellingShingle |
Mathematics Sloughter, T.M. Banas, Neil Sambrotto, R.N. Seasonal variation in light response of polar phytoplankton |
topic_facet |
Mathematics |
description |
The seasonality of light response curves was observed in phytoplankton samples taken in the Eastern Bering Sea (EBS) shortly before and during the spring bloom. Under-ice samples were found to have lower values of both the maximum growth rate (μ0) and the initial slope (α) of the photosynthesis-irradiance (PE) curve. This trend in α was also noted in a literature review of photoacclimation studies that looked at acclimation periods of 30 days or more. A trade-off is proposed between α and maintenance respiration such that below the compensation intensity EC it becomes advantageous to decrease α to mitigate the costs of respiration. An existing NPZD model of the EBS was then extended to reflect this trade-off with a seasonal transition from low to high α, and likewise μ0, at the point where available light is greater than EC. A parameter analysis found that with this seasonal plasticity the model could accurately reproduce the timing and magnitude of the 2009 spring bloom using parameter combinations within realistic ranges. Without this seasonality, no parameter set could be found that reasonably reproduced the observations. This strongly suggests that ecosystem models of phytoplankton should consider the effects of seasonality within parameters, including α which may be lower in over-wintering populations. |
format |
Article in Journal/Newspaper |
author |
Sloughter, T.M. Banas, Neil Sambrotto, R.N. |
author_facet |
Sloughter, T.M. Banas, Neil Sambrotto, R.N. |
author_sort |
Sloughter, T.M. |
title |
Seasonal variation in light response of polar phytoplankton |
title_short |
Seasonal variation in light response of polar phytoplankton |
title_full |
Seasonal variation in light response of polar phytoplankton |
title_fullStr |
Seasonal variation in light response of polar phytoplankton |
title_full_unstemmed |
Seasonal variation in light response of polar phytoplankton |
title_sort |
seasonal variation in light response of polar phytoplankton |
publishDate |
2018 |
url |
https://strathprints.strath.ac.uk/66450/ https://strathprints.strath.ac.uk/66450/1/Sloughter_etal_JMS_2018_Seasonal_variation_in_light_response_of_polar_phytoplankton.pdf https://doi.org/10.1016/j.jmarsys.2018.12.003 |
genre |
Bering Sea |
genre_facet |
Bering Sea |
op_relation |
https://strathprints.strath.ac.uk/66450/1/Sloughter_etal_JMS_2018_Seasonal_variation_in_light_response_of_polar_phytoplankton.pdf Sloughter, T.M. <https://strathprints.strath.ac.uk/view/author/1055562.html> and Banas, Neil <https://strathprints.strath.ac.uk/view/author/884063.html> and Sambrotto, R.N. (2018 <https://strathprints.strath.ac.uk/view/year/2018.html>) Seasonal variation in light response of polar phytoplankton. Journal of Marine Systems <https://strathprints.strath.ac.uk/view/publications/Journal_of_Marine_Systems.html>. ISSN 0924-7963 |
op_rights |
cc_by_nc_nd |
op_doi |
https://doi.org/10.1016/j.jmarsys.2018.12.003 |
container_title |
Journal of Marine Systems |
container_volume |
191 |
container_start_page |
64 |
op_container_end_page |
75 |
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1799477812007010304 |