Acid-base regulation, calcification and tolerance to ocean acidification in echinoderms
The current increase in the atmospheric CO2 concentration results in two major consequences in the marine environment: an increase of the sea surface temperature (0.7 °C since pre-industrial times) and a decreased seawater pH. This decrease is being measured continuously in different parts of the wo...
id |
ftunivbruxelles:oai:dipot.ulb.ac.be:2013/209286 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) |
op_collection_id |
ftunivbruxelles |
language |
French |
topic |
Biologie Sciences exactes et naturelles Echinodermata Ocean acidification Acid-base equilibrium Echinodermes Mer -- Acidification Equilibre acido-basique Acid base regulation echinoderms/régulation acide-base acidification des océans échinoderms |
spellingShingle |
Biologie Sciences exactes et naturelles Echinodermata Ocean acidification Acid-base equilibrium Echinodermes Mer -- Acidification Equilibre acido-basique Acid base regulation echinoderms/régulation acide-base acidification des océans échinoderms Collard, Marie Acid-base regulation, calcification and tolerance to ocean acidification in echinoderms |
topic_facet |
Biologie Sciences exactes et naturelles Echinodermata Ocean acidification Acid-base equilibrium Echinodermes Mer -- Acidification Equilibre acido-basique Acid base regulation echinoderms/régulation acide-base acidification des océans échinoderms |
description |
The current increase in the atmospheric CO2 concentration results in two major consequences in the marine environment: an increase of the sea surface temperature (0.7 °C since pre-industrial times) and a decreased seawater pH. This decrease is being measured continuously in different parts of the world and ranges from -0.0017 to -0.04 units per year according to the location considered. Based on CO2 emissions models provided by the IPCC, it was predicted that the average open ocean pH would decrease further by 0.4 units by 2100 and 0.8 by 2300 (corresponding to about a three-fold and six-fold increase of the proton concentration). Also, saturation states of seawater for the different forms of calcium carbonate, such as calcite, magnesium calcite and aragonite which are produced by calcifying marine organisms, are decreasing and consequently the saturation horizons of these minerals are shoaling. Today, some environments are characterized by pH values lower than the average open ocean pH. These are intertidal rock pools, upwelling zones, the deep-sea and CO2 vents. In these environments, pH is either constantly low or fluctuates. Those changes are either due to biological activity, geological CO2 leakage, or water masses movements. Within these environments, it has been hypothesized that organisms could be adapted or acclimatized to low pH values such as those predicted for the near-future. Tolerance to ocean acidification in metazoans is linked to their acid-base regulation capacities when facing environmental hypercapnia (i.e. increased CO2 concentration in the surrounding environment). The latter may result in a hypercapnia of the internal fluids and a concomitant acidosis (i.e. reduced pH of the internal fluids due to the dissociation of CO2 in this case). Organisms have two buffer systems allowing the compensation of this acidosis: the CO2-bicarbonate and the non-bicarbonate buffers. Homeostasis of the internal fluids thanks to these systems is essential for the proper functioning of enzymes and processes. ... |
author2 |
Dehairs, Frank Dubois, Philippe Leyns, Luc Elskens, Marc Danis, Bruno Chou, Lei Melzner, Frank Vanreusel, Ann |
format |
Doctoral or Postdoctoral Thesis |
author |
Collard, Marie |
author_facet |
Collard, Marie |
author_sort |
Collard, Marie |
title |
Acid-base regulation, calcification and tolerance to ocean acidification in echinoderms |
title_short |
Acid-base regulation, calcification and tolerance to ocean acidification in echinoderms |
title_full |
Acid-base regulation, calcification and tolerance to ocean acidification in echinoderms |
title_fullStr |
Acid-base regulation, calcification and tolerance to ocean acidification in echinoderms |
title_full_unstemmed |
Acid-base regulation, calcification and tolerance to ocean acidification in echinoderms |
title_sort |
acid-base regulation, calcification and tolerance to ocean acidification in echinoderms |
publisher |
Universite Libre de Bruxelles |
publishDate |
2014 |
url |
http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209286 https://dipot.ulb.ac.be/dspace/bitstream/2013/209286/6/0eafa1fd-4cb6-46ae-9ace-1377f842c423.txt https://dipot.ulb.ac.be/dspace/bitstream/2013/209286/11/dcf92cc0-218a-492a-96c7-12316cd382c0.txt https://dipot.ulb.ac.be/dspace/bitstream/2013/209286/19/598abe7e-0509-4611-b908-7c7a9fd931a8.txt https://dipot.ulb.ac.be/dspace/bitstream/2013/209286/5/c8775a3f-115c-4bed-ab64-514c21e77e99.txt https://dipot.ulb.ac.be/dspace/bitstream/2013/209286/14/f65eac1f-0b05-4724-b781-7c24101c28e8.txt https://dipot.ulb.ac.be/dspace/bitstream/2013/209286/10/83f51f46-6bc1-49af-b32a-862f80cb8d86.txt https://dipot.ulb.ac.be/dspace/bitstream/2013/209286/15/84e2f42d-16fa-4d6e-938f-16fdff0d0e27.txt https://dipot.ulb.ac.be/dspace/bitstream/2013/209286/3/02923409-c2d9-4967-a423-11bf82a4f4f1.txt https://dipot.ulb.ac.be/dspace/bitstream/2013/209286/2/a1cf01a6-2152-4144-b630-1accbf1f9c1d.txt https://dipot.ulb.ac.be/dspace/bitstream/2013/209286/1/044d1b3a-3fe0-4f6d-8994-2e7e8c5c7dce.txt https://dipot.ulb.ac.be/dspace/bitstream/2013/209286/4/757ff1b9-1eb2-4319-8467-200f7f68862e.txt https://dipot.ulb.ac.be/dspace/bitstream/2013/209286/17/8227f06b-19ad-4123-9031-3953fbd9cb31.txt https://dipot.ulb.ac.be/dspace/bitstream/2013/209286/18/a266a687-b2c2-41bc-89ab-4491662037b0.txt https://dipot.ulb.ac.be/dspace/bitstream/2013/209286/8/a62fd7f1-2765-460d-82e3-d31ead6f231a.txt https://dipot.ulb.ac.be/dspace/bitstream/2013/209286/9/8cb7bebf-e076-49e5-8d8a-53b29d7a2bab.txt https://dipot.ulb.ac.be/dspace/bitstream/2013/209286/16/0cc47914-4e5d-4798-a83a-41eeb1ea1610.txt https://dipot.ulb.ac.be/dspace/bitstream/2013/209286/12/2fc9b60c-5fe1-4762-99f1-5b9e1c1a4a55.txt https://dipot.ulb.ac.be/dspace/bitstream/2013/209286/22/6059403c-059c-4105-b736-ff1e90206758.txt https://dipot.ulb.ac.be/dspace/bitstream/2013/209286/7/7927242f-c88b-4acb-a815-b1ed508df7bc.txt https://dipot.ulb.ac.be/dspace/bitstream/2013/209286/13/e |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
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ftunivbruxelles:oai:dipot.ulb.ac.be:2013/209286 2023-05-15T17:50:30+02:00 Acid-base regulation, calcification and tolerance to ocean acidification in echinoderms Régulation acide-base, calcification et tolérance à l'acidification des océans chez les échinodermes Collard, Marie Dehairs, Frank Dubois, Philippe Leyns, Luc Elskens, Marc Danis, Bruno Chou, Lei Melzner, Frank Vanreusel, Ann 2014-06-30 1 v. (165 p.) 20 full-text file(s): application/pdf | application/pdf | application/pdf | application/pdf | application/pdf | application/pdf | application/pdf | application/pdf | application/pdf | application/pdf | application/pdf | application/pdf | application/pdf | application/pdf | application/pdf | application/pdf | application/pdf | application/pdf | application/pdf | application/pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209286 https://dipot.ulb.ac.be/dspace/bitstream/2013/209286/6/0eafa1fd-4cb6-46ae-9ace-1377f842c423.txt https://dipot.ulb.ac.be/dspace/bitstream/2013/209286/11/dcf92cc0-218a-492a-96c7-12316cd382c0.txt https://dipot.ulb.ac.be/dspace/bitstream/2013/209286/19/598abe7e-0509-4611-b908-7c7a9fd931a8.txt https://dipot.ulb.ac.be/dspace/bitstream/2013/209286/5/c8775a3f-115c-4bed-ab64-514c21e77e99.txt https://dipot.ulb.ac.be/dspace/bitstream/2013/209286/14/f65eac1f-0b05-4724-b781-7c24101c28e8.txt 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info:eu-repo/semantics/closedAccess | info:eu-repo/semantics/restrictedAccess | info:eu-repo/semantics/restrictedAccess | info:eu-repo/semantics/restrictedAccess | info:eu-repo/semantics/restrictedAccess | info:eu-repo/semantics/restrictedAccess | info:eu-repo/semantics/openAccess | info:eu-repo/semantics/closedAccess | info:eu-repo/semantics/restrictedAccess | info:eu-repo/semantics/openAccess | info:eu-repo/semantics/restrictedAccess | info:eu-repo/semantics/openAccess | info:eu-repo/semantics/closedAccess | info:eu-repo/semantics/closedAccess Biologie Sciences exactes et naturelles Echinodermata Ocean acidification Acid-base equilibrium Echinodermes Mer -- Acidification Equilibre acido-basique Acid base regulation echinoderms/régulation acide-base acidification des océans échinoderms info:eu-repo/semantics/doctoralThesis info:ulb-repo/semantics/doctoralThesis info:ulb-repo/semantics/openurl/vlink-dissertation 2014 ftunivbruxelles 2022-06-12T21:26:27Z The current increase in the atmospheric CO2 concentration results in two major consequences in the marine environment: an increase of the sea surface temperature (0.7 °C since pre-industrial times) and a decreased seawater pH. This decrease is being measured continuously in different parts of the world and ranges from -0.0017 to -0.04 units per year according to the location considered. Based on CO2 emissions models provided by the IPCC, it was predicted that the average open ocean pH would decrease further by 0.4 units by 2100 and 0.8 by 2300 (corresponding to about a three-fold and six-fold increase of the proton concentration). Also, saturation states of seawater for the different forms of calcium carbonate, such as calcite, magnesium calcite and aragonite which are produced by calcifying marine organisms, are decreasing and consequently the saturation horizons of these minerals are shoaling. Today, some environments are characterized by pH values lower than the average open ocean pH. These are intertidal rock pools, upwelling zones, the deep-sea and CO2 vents. In these environments, pH is either constantly low or fluctuates. Those changes are either due to biological activity, geological CO2 leakage, or water masses movements. Within these environments, it has been hypothesized that organisms could be adapted or acclimatized to low pH values such as those predicted for the near-future. Tolerance to ocean acidification in metazoans is linked to their acid-base regulation capacities when facing environmental hypercapnia (i.e. increased CO2 concentration in the surrounding environment). The latter may result in a hypercapnia of the internal fluids and a concomitant acidosis (i.e. reduced pH of the internal fluids due to the dissociation of CO2 in this case). Organisms have two buffer systems allowing the compensation of this acidosis: the CO2-bicarbonate and the non-bicarbonate buffers. Homeostasis of the internal fluids thanks to these systems is essential for the proper functioning of enzymes and processes. ... Doctoral or Postdoctoral Thesis Ocean acidification DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) |