OVERWINTERING INDIVIDUALS OF ARCTIC KRILL (THYSANOESSA INERMIS) ARE TOLERANT TO LOW PH CONDITIONS
Areas of the Arctic Ocean are already experiencing seasonal variations of low pH and elevated pCO2, with the entirety of the Arctic Ocean expected to be the most affected by ocean acidification (OA) in the very near future. As one of the most abundant first order consumers, Arctic krill, play an imp...
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ftunivplympearl:oai:pearl.plymouth.ac.uk:10026.2/2569 2023-05-15T14:31:36+02:00 OVERWINTERING INDIVIDUALS OF ARCTIC KRILL (THYSANOESSA INERMIS) ARE TOLERANT TO LOW PH CONDITIONS Venello, Theresa Ann 2014 http://hdl.handle.net/10026.2/2569 en eng http://hdl.handle.net/10026.2/2569 Thysanoessa inermis Arctic Ocean ocean acidification krill Thesis 2014 ftunivplympearl 2021-03-09T18:34:34Z Areas of the Arctic Ocean are already experiencing seasonal variations of low pH and elevated pCO2, with the entirety of the Arctic Ocean expected to be the most affected by ocean acidification (OA) in the very near future. As one of the most abundant first order consumers, Arctic krill, play an important ecological role within Arctic ecosystems. Therefore, understanding krill responses to low pH conditions have important implications for these ecosystems. However, very little is known about their responses to Arctic Ocean acidification. This study examined natural fjord seawater chemistry conditions in early spring as well as overwintering individuals of Thysanoessa inermis’s biological response to a range of low pH conditions. We explored the impacts of OA on oxygen consumption rates (as a proxy for standard metabolic rate), adenosine triphosphate (ATP), l-lactate and fatty acid composition. Thysanoessa inermis was incubated for 7 d in a range of low pH conditions (7.85, 7.75, 7.45) with an ambient control of 8.12. Our data revealed that across the range of low pH investigated there was no significant impact on krill biology. Our observations of natural seawater chemistry conditions showed a 0.3 unit difference in pH throughout the fjord. The results suggest that overwintering Thysanoessa inermis may have a tolerance to low pH due to the natural fjord conditions they experience. In collaboration with Plymouth Marine Laboratory (PML), Plymouth, Devon, UK Thesis Arctic krill Arctic Arctic Ocean Arctic Ocean Acidification Ocean acidification Thysanoessa inermis PEARL (Plymouth Electronic Archiv & ResearchLibrary, Plymouth University) Arctic Arctic Ocean |
institution |
Open Polar |
collection |
PEARL (Plymouth Electronic Archiv & ResearchLibrary, Plymouth University) |
op_collection_id |
ftunivplympearl |
language |
English |
topic |
Thysanoessa inermis Arctic Ocean ocean acidification krill |
spellingShingle |
Thysanoessa inermis Arctic Ocean ocean acidification krill Venello, Theresa Ann OVERWINTERING INDIVIDUALS OF ARCTIC KRILL (THYSANOESSA INERMIS) ARE TOLERANT TO LOW PH CONDITIONS |
topic_facet |
Thysanoessa inermis Arctic Ocean ocean acidification krill |
description |
Areas of the Arctic Ocean are already experiencing seasonal variations of low pH and elevated pCO2, with the entirety of the Arctic Ocean expected to be the most affected by ocean acidification (OA) in the very near future. As one of the most abundant first order consumers, Arctic krill, play an important ecological role within Arctic ecosystems. Therefore, understanding krill responses to low pH conditions have important implications for these ecosystems. However, very little is known about their responses to Arctic Ocean acidification. This study examined natural fjord seawater chemistry conditions in early spring as well as overwintering individuals of Thysanoessa inermis’s biological response to a range of low pH conditions. We explored the impacts of OA on oxygen consumption rates (as a proxy for standard metabolic rate), adenosine triphosphate (ATP), l-lactate and fatty acid composition. Thysanoessa inermis was incubated for 7 d in a range of low pH conditions (7.85, 7.75, 7.45) with an ambient control of 8.12. Our data revealed that across the range of low pH investigated there was no significant impact on krill biology. Our observations of natural seawater chemistry conditions showed a 0.3 unit difference in pH throughout the fjord. The results suggest that overwintering Thysanoessa inermis may have a tolerance to low pH due to the natural fjord conditions they experience. In collaboration with Plymouth Marine Laboratory (PML), Plymouth, Devon, UK |
format |
Thesis |
author |
Venello, Theresa Ann |
author_facet |
Venello, Theresa Ann |
author_sort |
Venello, Theresa Ann |
title |
OVERWINTERING INDIVIDUALS OF ARCTIC KRILL (THYSANOESSA INERMIS) ARE TOLERANT TO LOW PH CONDITIONS |
title_short |
OVERWINTERING INDIVIDUALS OF ARCTIC KRILL (THYSANOESSA INERMIS) ARE TOLERANT TO LOW PH CONDITIONS |
title_full |
OVERWINTERING INDIVIDUALS OF ARCTIC KRILL (THYSANOESSA INERMIS) ARE TOLERANT TO LOW PH CONDITIONS |
title_fullStr |
OVERWINTERING INDIVIDUALS OF ARCTIC KRILL (THYSANOESSA INERMIS) ARE TOLERANT TO LOW PH CONDITIONS |
title_full_unstemmed |
OVERWINTERING INDIVIDUALS OF ARCTIC KRILL (THYSANOESSA INERMIS) ARE TOLERANT TO LOW PH CONDITIONS |
title_sort |
overwintering individuals of arctic krill (thysanoessa inermis) are tolerant to low ph conditions |
publishDate |
2014 |
url |
http://hdl.handle.net/10026.2/2569 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic krill Arctic Arctic Ocean Arctic Ocean Acidification Ocean acidification Thysanoessa inermis |
genre_facet |
Arctic krill Arctic Arctic Ocean Arctic Ocean Acidification Ocean acidification Thysanoessa inermis |
op_relation |
http://hdl.handle.net/10026.2/2569 |
_version_ |
1766305176118886400 |