Sensitivity of phytoplankton to climate change: Direct and interactive effects of CO2 on primary production and community composition
Marine phytoplankton constitutes about half of the primary production on Earth. It forms the base of the marine food web and is a pivotal player in the marine biological carbon pump. The primary environmental drivers that control phytoplankton growth are temperature, nutrient availability, light, an...
Main Author: | |
---|---|
Other Authors: | , |
Format: | Doctoral or Postdoctoral Thesis |
Language: | English |
Published: |
Universität Bremen
2022
|
Subjects: | |
Online Access: | https://media.suub.uni-bremen.de/handle/elib/5813 https://doi.org/10.26092/elib/1436 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib58132 |
id |
ftsubbremen:oai:media.suub.uni-bremen.de:Publications/elib/5813 |
---|---|
record_format |
openpolar |
spelling |
ftsubbremen:oai:media.suub.uni-bremen.de:Publications/elib/5813 2023-05-15T17:50:56+02:00 Sensitivity of phytoplankton to climate change: Direct and interactive effects of CO2 on primary production and community composition Seifert, Miriam Hauck, Judith Vogt, Meike 2022-02-23 application/pdf https://media.suub.uni-bremen.de/handle/elib/5813 https://doi.org/10.26092/elib/1436 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib58132 eng eng Universität Bremen Fachbereich 02: Biologie/Chemie (FB 02) https://media.suub.uni-bremen.de/handle/elib/5813 http://dx.doi.org/10.26092/elib/1436 doi:10.26092/elib/1436 urn:nbn:de:gbv:46-elib58132 info:eu-repo/semantics/openAccess CC BY 4.0 (Attribution) https://creativecommons.org/licenses/by/4.0/ CC-BY biogeochemical modelling ocean acidification multiple driver meta-analysis phytoplankton coccolithophores 570 570 Life sciences biology ddc:570 Dissertation doctoralThesis 2022 ftsubbremen https://doi.org/10.26092/elib/1436 2022-11-09T07:10:24Z Marine phytoplankton constitutes about half of the primary production on Earth. It forms the base of the marine food web and is a pivotal player in the marine biological carbon pump. The primary environmental drivers that control phytoplankton growth are temperature, nutrient availability, light, and the concentration of inorganic carbon species. Ongoing climate change modifies these drivers, leading to a warming, high-CO2 ocean with altered nutrient availabilities and light regimes. Changes in phytoplankton productivity and community composition resulting from these newly emerging environmental states in the ocean have important implications for the marine ecosystem and carbon cycling. Biogeochemical ocean models are used to investigate how marine primary production may be affected by future climate change under different emission scenarios. Phytoplankton growth rates in models are typically determined by functions describing growth dependencies on temperature, light, and nutrients. However, a large body of laboratory studies on phytoplankton responses to environmental drivers reveals two points that are usually not considered in current biogeochemical models. Firstly, phytoplankton growth can be considerably modified by the state of the carbonate system. Changes in inorganic carbon species concentrations can be either growth-enhancing (CO2(aq) and bicarbonate are substrates for photosynthesis), or growth-dampening (increasing CO2(aq) levels lead to a shift in the carbonate equilibria and result in a pH decrease, a process which is called ocean acidification). Functions describing this growth dependence of phytoplankton on the carbonate system have not been implemented in large-scale ocean biogeochemical models so far. Secondly, growth responses towards one driver can be modified if the level of another driver is changing. Functions including these so-called interactive driver effects partly exist in models (e.g. the response to varying light levels may depend on the nutrient limitation term). However, the ... Doctoral or Postdoctoral Thesis Ocean acidification Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) |
institution |
Open Polar |
collection |
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) |
op_collection_id |
ftsubbremen |
language |
English |
topic |
biogeochemical modelling ocean acidification multiple driver meta-analysis phytoplankton coccolithophores 570 570 Life sciences biology ddc:570 |
spellingShingle |
biogeochemical modelling ocean acidification multiple driver meta-analysis phytoplankton coccolithophores 570 570 Life sciences biology ddc:570 Seifert, Miriam Sensitivity of phytoplankton to climate change: Direct and interactive effects of CO2 on primary production and community composition |
topic_facet |
biogeochemical modelling ocean acidification multiple driver meta-analysis phytoplankton coccolithophores 570 570 Life sciences biology ddc:570 |
description |
Marine phytoplankton constitutes about half of the primary production on Earth. It forms the base of the marine food web and is a pivotal player in the marine biological carbon pump. The primary environmental drivers that control phytoplankton growth are temperature, nutrient availability, light, and the concentration of inorganic carbon species. Ongoing climate change modifies these drivers, leading to a warming, high-CO2 ocean with altered nutrient availabilities and light regimes. Changes in phytoplankton productivity and community composition resulting from these newly emerging environmental states in the ocean have important implications for the marine ecosystem and carbon cycling. Biogeochemical ocean models are used to investigate how marine primary production may be affected by future climate change under different emission scenarios. Phytoplankton growth rates in models are typically determined by functions describing growth dependencies on temperature, light, and nutrients. However, a large body of laboratory studies on phytoplankton responses to environmental drivers reveals two points that are usually not considered in current biogeochemical models. Firstly, phytoplankton growth can be considerably modified by the state of the carbonate system. Changes in inorganic carbon species concentrations can be either growth-enhancing (CO2(aq) and bicarbonate are substrates for photosynthesis), or growth-dampening (increasing CO2(aq) levels lead to a shift in the carbonate equilibria and result in a pH decrease, a process which is called ocean acidification). Functions describing this growth dependence of phytoplankton on the carbonate system have not been implemented in large-scale ocean biogeochemical models so far. Secondly, growth responses towards one driver can be modified if the level of another driver is changing. Functions including these so-called interactive driver effects partly exist in models (e.g. the response to varying light levels may depend on the nutrient limitation term). However, the ... |
author2 |
Hauck, Judith Vogt, Meike |
format |
Doctoral or Postdoctoral Thesis |
author |
Seifert, Miriam |
author_facet |
Seifert, Miriam |
author_sort |
Seifert, Miriam |
title |
Sensitivity of phytoplankton to climate change: Direct and interactive effects of CO2 on primary production and community composition |
title_short |
Sensitivity of phytoplankton to climate change: Direct and interactive effects of CO2 on primary production and community composition |
title_full |
Sensitivity of phytoplankton to climate change: Direct and interactive effects of CO2 on primary production and community composition |
title_fullStr |
Sensitivity of phytoplankton to climate change: Direct and interactive effects of CO2 on primary production and community composition |
title_full_unstemmed |
Sensitivity of phytoplankton to climate change: Direct and interactive effects of CO2 on primary production and community composition |
title_sort |
sensitivity of phytoplankton to climate change: direct and interactive effects of co2 on primary production and community composition |
publisher |
Universität Bremen |
publishDate |
2022 |
url |
https://media.suub.uni-bremen.de/handle/elib/5813 https://doi.org/10.26092/elib/1436 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib58132 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
https://media.suub.uni-bremen.de/handle/elib/5813 http://dx.doi.org/10.26092/elib/1436 doi:10.26092/elib/1436 urn:nbn:de:gbv:46-elib58132 |
op_rights |
info:eu-repo/semantics/openAccess CC BY 4.0 (Attribution) https://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.26092/elib/1436 |
_version_ |
1766157884061646848 |