THE MORPHOLOGICAL AND PHYSIOLOGICAL RESPONSE OF GENETICALLY CHARACTERISED EMILIANIA HUXLEYI ISOLATES TO OCEAN ACIDIFICATION
Emiliania huxleyi is an important calcifier and primary producer, playing key roles in global carbon cycling. It is thought to be vulnerable to the effects that rising atmospheric pCO2 may have on ocean chemistry. However, past studies show inconsistent phenotypic responses to elevated pCO2 condit...
Main Author: | |
---|---|
Format: | Thesis |
Language: | English |
Published: |
2013
|
Subjects: | |
Online Access: | http://hdl.handle.net/10026.2/2343 |
id |
ftunivplympearl:oai:pearl.plymouth.ac.uk:10026.2/2343 |
---|---|
record_format |
openpolar |
spelling |
ftunivplympearl:oai:pearl.plymouth.ac.uk:10026.2/2343 2023-05-15T17:50:34+02:00 THE MORPHOLOGICAL AND PHYSIOLOGICAL RESPONSE OF GENETICALLY CHARACTERISED EMILIANIA HUXLEYI ISOLATES TO OCEAN ACIDIFICATION Chakravarti, Leela 2013 http://hdl.handle.net/10026.2/2343 en eng http://hdl.handle.net/10026.2/2343 Emiliania huxleyi coccolith morphology motif (CMM) phenotypic plasticity 37 ocean acidification calcification primary production Thesis 2013 ftunivplympearl 2021-03-09T18:34:39Z Emiliania huxleyi is an important calcifier and primary producer, playing key roles in global carbon cycling. It is thought to be vulnerable to the effects that rising atmospheric pCO2 may have on ocean chemistry. However, past studies show inconsistent phenotypic responses to elevated pCO2 conditions, suggesting an underlying genetic basis for such variation. E. huxleyi isolates from different geographic locations were genotyped according to the coccolith morphology motif (CMM), found in the 3’ untranslated region of a gene coding for a protein thought to be involved in calcification. Isolates were exposed to short-term ambient and elevated pCO2 conditions in order to determine the relative extent that genotype or environment may play on phenotypic plasticity. CMM genotype was associated with morphological and primary productivity response to elevated pCO2 while the calcification response correlated with environmental history; namely sea surface temperature and associated seawater chemistry. We suggest that the regulation of the CMM region is affected by acidification, altering morphology and thus the efficiency of photosynthesis in E. huxleyi. Furthermore, we conclude that increased calcification response of high-latitude E. huxleyi isolates represents the result of adaptive evolution acting to select physiology which increases fitness in environments already indicative of a future higher-pCO2 world. In collaboration with The Marine Biological Association, Devon, UK Thesis Ocean acidification PEARL (Plymouth Electronic Archiv & ResearchLibrary, Plymouth University) |
institution |
Open Polar |
collection |
PEARL (Plymouth Electronic Archiv & ResearchLibrary, Plymouth University) |
op_collection_id |
ftunivplympearl |
language |
English |
topic |
Emiliania huxleyi coccolith morphology motif (CMM) phenotypic plasticity 37 ocean acidification calcification primary production |
spellingShingle |
Emiliania huxleyi coccolith morphology motif (CMM) phenotypic plasticity 37 ocean acidification calcification primary production Chakravarti, Leela THE MORPHOLOGICAL AND PHYSIOLOGICAL RESPONSE OF GENETICALLY CHARACTERISED EMILIANIA HUXLEYI ISOLATES TO OCEAN ACIDIFICATION |
topic_facet |
Emiliania huxleyi coccolith morphology motif (CMM) phenotypic plasticity 37 ocean acidification calcification primary production |
description |
Emiliania huxleyi is an important calcifier and primary producer, playing key roles in global carbon cycling. It is thought to be vulnerable to the effects that rising atmospheric pCO2 may have on ocean chemistry. However, past studies show inconsistent phenotypic responses to elevated pCO2 conditions, suggesting an underlying genetic basis for such variation. E. huxleyi isolates from different geographic locations were genotyped according to the coccolith morphology motif (CMM), found in the 3’ untranslated region of a gene coding for a protein thought to be involved in calcification. Isolates were exposed to short-term ambient and elevated pCO2 conditions in order to determine the relative extent that genotype or environment may play on phenotypic plasticity. CMM genotype was associated with morphological and primary productivity response to elevated pCO2 while the calcification response correlated with environmental history; namely sea surface temperature and associated seawater chemistry. We suggest that the regulation of the CMM region is affected by acidification, altering morphology and thus the efficiency of photosynthesis in E. huxleyi. Furthermore, we conclude that increased calcification response of high-latitude E. huxleyi isolates represents the result of adaptive evolution acting to select physiology which increases fitness in environments already indicative of a future higher-pCO2 world. In collaboration with The Marine Biological Association, Devon, UK |
format |
Thesis |
author |
Chakravarti, Leela |
author_facet |
Chakravarti, Leela |
author_sort |
Chakravarti, Leela |
title |
THE MORPHOLOGICAL AND PHYSIOLOGICAL RESPONSE OF GENETICALLY CHARACTERISED EMILIANIA HUXLEYI ISOLATES TO OCEAN ACIDIFICATION |
title_short |
THE MORPHOLOGICAL AND PHYSIOLOGICAL RESPONSE OF GENETICALLY CHARACTERISED EMILIANIA HUXLEYI ISOLATES TO OCEAN ACIDIFICATION |
title_full |
THE MORPHOLOGICAL AND PHYSIOLOGICAL RESPONSE OF GENETICALLY CHARACTERISED EMILIANIA HUXLEYI ISOLATES TO OCEAN ACIDIFICATION |
title_fullStr |
THE MORPHOLOGICAL AND PHYSIOLOGICAL RESPONSE OF GENETICALLY CHARACTERISED EMILIANIA HUXLEYI ISOLATES TO OCEAN ACIDIFICATION |
title_full_unstemmed |
THE MORPHOLOGICAL AND PHYSIOLOGICAL RESPONSE OF GENETICALLY CHARACTERISED EMILIANIA HUXLEYI ISOLATES TO OCEAN ACIDIFICATION |
title_sort |
morphological and physiological response of genetically characterised emiliania huxleyi isolates to ocean acidification |
publishDate |
2013 |
url |
http://hdl.handle.net/10026.2/2343 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
http://hdl.handle.net/10026.2/2343 |
_version_ |
1766157386177839104 |