Mitochondrial plasticity in response to changing abiotic factors in Antarctic fish and cephalopods
Antarctic species possess very low metabolic rates and poor capacities to change their physiological state, thus making them extremely vulnerable to changing environmental conditions. Mitochondria are a key element in shaping whole organism energy turnover and functional capacity. In my study, the e...
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Universität Bremen
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ftsubbremen:oai:media.suub.uni-bremen.de:Publications/elib/495 2023-05-15T14:04:15+02:00 Mitochondrial plasticity in response to changing abiotic factors in Antarctic fish and cephalopods Mitochondriale Anpassungsfähigkeit antarktischer Fische und Cephalopoden bei sich ändernden abiotischen Faktoren Strobel, Anneli Pörtner, Hans Claireaux, Guy 2013-04-08 application/pdf https://media.suub.uni-bremen.de/handle/elib/495 https://nbn-resolving.org/urn:nbn:de:gbv:46-00103202-10 eng eng Universität Bremen FB2 Biologie/Chemie https://media.suub.uni-bremen.de/handle/elib/495 urn:nbn:de:gbv:46-00103202-10 info:eu-repo/semantics/openAccess Notothenioid fish cephalopods octopods Antarctic oxygen consumption routine metabolic rate extracellular pH (pHe) intracellular pH (pHi) mitochondrial respiration lipids proton leak acclimation acid-base ocean acidification ocean warming 570 570 Life sciences biology ddc:570 Dissertation doctoralThesis 2013 ftsubbremen 2022-11-09T07:09:22Z Antarctic species possess very low metabolic rates and poor capacities to change their physiological state, thus making them extremely vulnerable to changing environmental conditions. Mitochondria are a key element in shaping whole organism energy turnover and functional capacity. In my study, the effects of rising temperature and increased seawater PCO2 on the energy metabolism were compared between various nototheniids from sub-Antarctic and cold-temperate and Antarctic waters, and between cephalopods from the Antarctic and temperate latitudes. I determined extra- and intracellular blood carbonate parameters, enzymatic capacities and oxygen consumption at whole animal and mitochondrial level and mitochondrial lipid composition and proton leak as a measure for routine metabolic rate, in order to compare their abilities for metabolic compensation towards climate change. My results showed limited aerobic capacities of high-Antarctic fish mitochondria towards the warmth and higher CO2-levels. The mitochondrial responses of cephalopods to an acute temperature rise suggest that they possess similar mitochondrial flexibilities and capacities towards the warmth as fish. Nevertheless, generally more effective capacities for acid-base regulation and larger energy reserves (lipids) in fish compared to cephalopods will putatively make them win the competition for resources over longer time-scales, when seawater temperatures and PCO2 continue to rise. Doctoral or Postdoctoral Thesis Antarc* Antarctic Antarktis* Ocean acidification Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) Antarctic The Antarctic |
institution |
Open Polar |
collection |
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) |
op_collection_id |
ftsubbremen |
language |
English |
topic |
Notothenioid fish cephalopods octopods Antarctic oxygen consumption routine metabolic rate extracellular pH (pHe) intracellular pH (pHi) mitochondrial respiration lipids proton leak acclimation acid-base ocean acidification ocean warming 570 570 Life sciences biology ddc:570 |
spellingShingle |
Notothenioid fish cephalopods octopods Antarctic oxygen consumption routine metabolic rate extracellular pH (pHe) intracellular pH (pHi) mitochondrial respiration lipids proton leak acclimation acid-base ocean acidification ocean warming 570 570 Life sciences biology ddc:570 Strobel, Anneli Mitochondrial plasticity in response to changing abiotic factors in Antarctic fish and cephalopods |
topic_facet |
Notothenioid fish cephalopods octopods Antarctic oxygen consumption routine metabolic rate extracellular pH (pHe) intracellular pH (pHi) mitochondrial respiration lipids proton leak acclimation acid-base ocean acidification ocean warming 570 570 Life sciences biology ddc:570 |
description |
Antarctic species possess very low metabolic rates and poor capacities to change their physiological state, thus making them extremely vulnerable to changing environmental conditions. Mitochondria are a key element in shaping whole organism energy turnover and functional capacity. In my study, the effects of rising temperature and increased seawater PCO2 on the energy metabolism were compared between various nototheniids from sub-Antarctic and cold-temperate and Antarctic waters, and between cephalopods from the Antarctic and temperate latitudes. I determined extra- and intracellular blood carbonate parameters, enzymatic capacities and oxygen consumption at whole animal and mitochondrial level and mitochondrial lipid composition and proton leak as a measure for routine metabolic rate, in order to compare their abilities for metabolic compensation towards climate change. My results showed limited aerobic capacities of high-Antarctic fish mitochondria towards the warmth and higher CO2-levels. The mitochondrial responses of cephalopods to an acute temperature rise suggest that they possess similar mitochondrial flexibilities and capacities towards the warmth as fish. Nevertheless, generally more effective capacities for acid-base regulation and larger energy reserves (lipids) in fish compared to cephalopods will putatively make them win the competition for resources over longer time-scales, when seawater temperatures and PCO2 continue to rise. |
author2 |
Pörtner, Hans Claireaux, Guy |
format |
Doctoral or Postdoctoral Thesis |
author |
Strobel, Anneli |
author_facet |
Strobel, Anneli |
author_sort |
Strobel, Anneli |
title |
Mitochondrial plasticity in response to changing abiotic factors in Antarctic fish and cephalopods |
title_short |
Mitochondrial plasticity in response to changing abiotic factors in Antarctic fish and cephalopods |
title_full |
Mitochondrial plasticity in response to changing abiotic factors in Antarctic fish and cephalopods |
title_fullStr |
Mitochondrial plasticity in response to changing abiotic factors in Antarctic fish and cephalopods |
title_full_unstemmed |
Mitochondrial plasticity in response to changing abiotic factors in Antarctic fish and cephalopods |
title_sort |
mitochondrial plasticity in response to changing abiotic factors in antarctic fish and cephalopods |
publisher |
Universität Bremen |
publishDate |
2013 |
url |
https://media.suub.uni-bremen.de/handle/elib/495 https://nbn-resolving.org/urn:nbn:de:gbv:46-00103202-10 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarktis* Ocean acidification |
genre_facet |
Antarc* Antarctic Antarktis* Ocean acidification |
op_relation |
https://media.suub.uni-bremen.de/handle/elib/495 urn:nbn:de:gbv:46-00103202-10 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766275277545013248 |