Modern planktic foraminifer biomass and its impact on the biological carbon pump
Planktic foraminifers (PF) are heterotrophic mesozooplankton of global marine abundance, being ubiquitous proxy in paleoceanography, and climate reconstruction. In turn, the individual and biomass (Corg) of PF was largely unknown due to methodological problems. To quantitatively understand the troph...
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ftunivangershal:oai:HAL:tel-00950433v1 2023-05-15T17:37:00+02:00 Modern planktic foraminifer biomass and its impact on the biological carbon pump La biomasse des foraminifères planctoniques actuels et son impact sur la pompe biologique de carbone Movellan, Aurore Bio-Indicateurs Actuels et Fossiles (BIAF) Université d'Angers (UA) Université d'Angers Ralf Schiebel 2013-09-26 https://theses.hal.science/tel-00950433 https://theses.hal.science/tel-00950433/document https://theses.hal.science/tel-00950433/file/These_Movellan_2013.pdf fr fre HAL CCSD tel-00950433 https://theses.hal.science/tel-00950433 https://theses.hal.science/tel-00950433/document https://theses.hal.science/tel-00950433/file/These_Movellan_2013.pdf info:eu-repo/semantics/OpenAccess https://theses.hal.science/tel-00950433 Sciences de la Terre. Université d'Angers, 2013. Français. ⟨NNT : ⟩ Biomass foraminifers biogeochemistry proteins nano-spectrophotometry biological carbon pump paleoceanography Biomasse foraminifères biogéochimie protéines nano-spectrophotométrie pompe biologique de carbone climat paléocéanographie [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/doctoralThesis Theses 2013 ftunivangershal 2023-02-06T20:43:50Z Planktic foraminifers (PF) are heterotrophic mesozooplankton of global marine abundance, being ubiquitous proxy in paleoceanography, and climate reconstruction. In turn, the individual and biomass (Corg) of PF was largely unknown due to methodological problems. To quantitatively understand the trophic position of PF within the regional and global plankton, we have developed a new analytical method, and quantified the individual biomass of 952 specimens of 26 PF species. The new non-destructive protocol is derived from the bicinchoninic acid (BCA) method, and a nano-photospectrometer is used to measure protein biomass. We tested the method on the benthic foraminifer Ammonia tepida, from fresh and frozen samples, and from culture experiments. We then applied the new method to measure PF protein-biomass of specimens from oligotrophic and eutrophic regions, including the subtropical to temperate ocean. The average individual PF biomass amounts to 0.845 μg. Our results indicate neither inter-specific differences nor any influence of the shape of test on the individual biomass. In turn, Individual PF biomass is highly correlated with test size and mass, and independent of ecologic conditions (i.e., e.g., trophic state, water depth, and temperature). Following our new method, the PF assemblage biomass was calculated from 1128 locations and water depth from the North Atlantic, Arabian Sea, Red Sea, and Caribbean, and literature data from off Japan and Oregon. A first-order estimate of the average global PF biomass production amounts to 25-100 Tg C yr−1 including juvenile individuals. The organic to inorganic carbon (Corg : Cinorg) ratio of PF populations between the surface and subsurface water column down to 2500 m water depth seems to stay constant at ~2/3, as indicated by a case study from the Azores region. Those results show an export of both Corg and Cinorg to the deep ocean, making PF part of the biological carbon pump. The results obtained in this thesis make PF a potential proxy to quantify the biomass of ... Doctoral or Postdoctoral Thesis North Atlantic Portail des publications scientifiques de l’Université d’Angers (HAL) |
institution |
Open Polar |
collection |
Portail des publications scientifiques de l’Université d’Angers (HAL) |
op_collection_id |
ftunivangershal |
language |
French |
topic |
Biomass foraminifers biogeochemistry proteins nano-spectrophotometry biological carbon pump paleoceanography Biomasse foraminifères biogéochimie protéines nano-spectrophotométrie pompe biologique de carbone climat paléocéanographie [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
Biomass foraminifers biogeochemistry proteins nano-spectrophotometry biological carbon pump paleoceanography Biomasse foraminifères biogéochimie protéines nano-spectrophotométrie pompe biologique de carbone climat paléocéanographie [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Movellan, Aurore Modern planktic foraminifer biomass and its impact on the biological carbon pump |
topic_facet |
Biomass foraminifers biogeochemistry proteins nano-spectrophotometry biological carbon pump paleoceanography Biomasse foraminifères biogéochimie protéines nano-spectrophotométrie pompe biologique de carbone climat paléocéanographie [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
Planktic foraminifers (PF) are heterotrophic mesozooplankton of global marine abundance, being ubiquitous proxy in paleoceanography, and climate reconstruction. In turn, the individual and biomass (Corg) of PF was largely unknown due to methodological problems. To quantitatively understand the trophic position of PF within the regional and global plankton, we have developed a new analytical method, and quantified the individual biomass of 952 specimens of 26 PF species. The new non-destructive protocol is derived from the bicinchoninic acid (BCA) method, and a nano-photospectrometer is used to measure protein biomass. We tested the method on the benthic foraminifer Ammonia tepida, from fresh and frozen samples, and from culture experiments. We then applied the new method to measure PF protein-biomass of specimens from oligotrophic and eutrophic regions, including the subtropical to temperate ocean. The average individual PF biomass amounts to 0.845 μg. Our results indicate neither inter-specific differences nor any influence of the shape of test on the individual biomass. In turn, Individual PF biomass is highly correlated with test size and mass, and independent of ecologic conditions (i.e., e.g., trophic state, water depth, and temperature). Following our new method, the PF assemblage biomass was calculated from 1128 locations and water depth from the North Atlantic, Arabian Sea, Red Sea, and Caribbean, and literature data from off Japan and Oregon. A first-order estimate of the average global PF biomass production amounts to 25-100 Tg C yr−1 including juvenile individuals. The organic to inorganic carbon (Corg : Cinorg) ratio of PF populations between the surface and subsurface water column down to 2500 m water depth seems to stay constant at ~2/3, as indicated by a case study from the Azores region. Those results show an export of both Corg and Cinorg to the deep ocean, making PF part of the biological carbon pump. The results obtained in this thesis make PF a potential proxy to quantify the biomass of ... |
author2 |
Bio-Indicateurs Actuels et Fossiles (BIAF) Université d'Angers (UA) Université d'Angers Ralf Schiebel |
format |
Doctoral or Postdoctoral Thesis |
author |
Movellan, Aurore |
author_facet |
Movellan, Aurore |
author_sort |
Movellan, Aurore |
title |
Modern planktic foraminifer biomass and its impact on the biological carbon pump |
title_short |
Modern planktic foraminifer biomass and its impact on the biological carbon pump |
title_full |
Modern planktic foraminifer biomass and its impact on the biological carbon pump |
title_fullStr |
Modern planktic foraminifer biomass and its impact on the biological carbon pump |
title_full_unstemmed |
Modern planktic foraminifer biomass and its impact on the biological carbon pump |
title_sort |
modern planktic foraminifer biomass and its impact on the biological carbon pump |
publisher |
HAL CCSD |
publishDate |
2013 |
url |
https://theses.hal.science/tel-00950433 https://theses.hal.science/tel-00950433/document https://theses.hal.science/tel-00950433/file/These_Movellan_2013.pdf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
https://theses.hal.science/tel-00950433 Sciences de la Terre. Université d'Angers, 2013. Français. ⟨NNT : ⟩ |
op_relation |
tel-00950433 https://theses.hal.science/tel-00950433 https://theses.hal.science/tel-00950433/document https://theses.hal.science/tel-00950433/file/These_Movellan_2013.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1766136696986927104 |