An Investigation of the Effects of Ocean Acidification on Larval Development, Juvenile Settlement and Mortality, Growth, Onset of Egg Production, Shell Integrity and Feeding Activity in the Common Barnacle Amphibalanus amphitrite
ABSTRACT Ocean acidification is of great concern among the scientific community and is caused by the anthropogenic release of CO2 from the burning of fossil fuels. Higher levels of atmospheric CO2 are anticipated to cause a decrease in oceanic pH. Recent studies have shown that this can have adverse...
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ftualabbirmingha:oai:digitalcommons.library.uab.edu:etd-collection-3424 2024-05-19T07:46:30+00:00 An Investigation of the Effects of Ocean Acidification on Larval Development, Juvenile Settlement and Mortality, Growth, Onset of Egg Production, Shell Integrity and Feeding Activity in the Common Barnacle Amphibalanus amphitrite McDonald, Michelle R 2011-01-01T08:00:00Z application/pdf https://digitalcommons.library.uab.edu/etd-collection/2432 https://digitalcommons.library.uab.edu/context/etd-collection/article/3424/viewcontent/McDonald_uab_0005M_10656.pdf unknown UAB Digital Commons https://digitalcommons.library.uab.edu/etd-collection/2432 https://digitalcommons.library.uab.edu/context/etd-collection/article/3424/viewcontent/McDonald_uab_0005M_10656.pdf All ETDs from UAB barnacle co2 ecology larvae life history ocean acidification Master of Science (MS) College of Arts and Sciences Arts and Humanities text 2011 ftualabbirmingha 2024-04-25T17:03:35Z ABSTRACT Ocean acidification is of great concern among the scientific community and is caused by the anthropogenic release of CO2 from the burning of fossil fuels. Higher levels of atmospheric CO2 are anticipated to cause a decrease in oceanic pH. Recent studies have shown that this can have adverse effects on a variety of marine organisms; calcified organisms are predicted to be the most heavily affected and of these types of organisms, barnacles have received little attention. The barnacle Amphibalanus amphitrite was utilized to examine the effects of Ocean acidification across various life history stages. No adverse effects of reduced seawater pH (7.4) were found upon larval condition, cyprid size, cyprid attachment and metamorphosis juvenile-to-adult growth, and egg production. However, barnacles exposed to acidified water had significantly larger basal shell diameters than those developing in ambient pH (8.2) seawater, suggestive of compensatory hypercalcification. Furthermore, the force required to remove the barnacles from their substrate was significantly greater in the acidified than in the non-acidified group. Comparisons of ash content in basal shells show significantly more ash in the acidified group, further confirming our observation of compensatory calcification. Despite this finding, penetrometry revealed that the central wall plates of barnacles exposed to acidified seawater were significantly weaker than individuals in ambient seawater. Thus ecologically, weaker shells could reduce the resistance of barnacles to crushing predators. Prey feeding rates of near adult sized barnacles were significantly lower for those in acidified seawater versus those held in ambient seawater and an analysis of the mechanism behind reduced prey capture determined that cirral beat frequency when feeding did not differ significantly between the two treatment groups. Overall, these findings indicate that reduced energy acquisition and dissolution of shells under reduced pH may play an important role in the lack of ... Text Ocean acidification UAB Digital Commons (University of Alabama at Birmingham Libraries) |
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Open Polar |
collection |
UAB Digital Commons (University of Alabama at Birmingham Libraries) |
op_collection_id |
ftualabbirmingha |
language |
unknown |
topic |
barnacle co2 ecology larvae life history ocean acidification Master of Science (MS) College of Arts and Sciences Arts and Humanities |
spellingShingle |
barnacle co2 ecology larvae life history ocean acidification Master of Science (MS) College of Arts and Sciences Arts and Humanities McDonald, Michelle R An Investigation of the Effects of Ocean Acidification on Larval Development, Juvenile Settlement and Mortality, Growth, Onset of Egg Production, Shell Integrity and Feeding Activity in the Common Barnacle Amphibalanus amphitrite |
topic_facet |
barnacle co2 ecology larvae life history ocean acidification Master of Science (MS) College of Arts and Sciences Arts and Humanities |
description |
ABSTRACT Ocean acidification is of great concern among the scientific community and is caused by the anthropogenic release of CO2 from the burning of fossil fuels. Higher levels of atmospheric CO2 are anticipated to cause a decrease in oceanic pH. Recent studies have shown that this can have adverse effects on a variety of marine organisms; calcified organisms are predicted to be the most heavily affected and of these types of organisms, barnacles have received little attention. The barnacle Amphibalanus amphitrite was utilized to examine the effects of Ocean acidification across various life history stages. No adverse effects of reduced seawater pH (7.4) were found upon larval condition, cyprid size, cyprid attachment and metamorphosis juvenile-to-adult growth, and egg production. However, barnacles exposed to acidified water had significantly larger basal shell diameters than those developing in ambient pH (8.2) seawater, suggestive of compensatory hypercalcification. Furthermore, the force required to remove the barnacles from their substrate was significantly greater in the acidified than in the non-acidified group. Comparisons of ash content in basal shells show significantly more ash in the acidified group, further confirming our observation of compensatory calcification. Despite this finding, penetrometry revealed that the central wall plates of barnacles exposed to acidified seawater were significantly weaker than individuals in ambient seawater. Thus ecologically, weaker shells could reduce the resistance of barnacles to crushing predators. Prey feeding rates of near adult sized barnacles were significantly lower for those in acidified seawater versus those held in ambient seawater and an analysis of the mechanism behind reduced prey capture determined that cirral beat frequency when feeding did not differ significantly between the two treatment groups. Overall, these findings indicate that reduced energy acquisition and dissolution of shells under reduced pH may play an important role in the lack of ... |
format |
Text |
author |
McDonald, Michelle R |
author_facet |
McDonald, Michelle R |
author_sort |
McDonald, Michelle R |
title |
An Investigation of the Effects of Ocean Acidification on Larval Development, Juvenile Settlement and Mortality, Growth, Onset of Egg Production, Shell Integrity and Feeding Activity in the Common Barnacle Amphibalanus amphitrite |
title_short |
An Investigation of the Effects of Ocean Acidification on Larval Development, Juvenile Settlement and Mortality, Growth, Onset of Egg Production, Shell Integrity and Feeding Activity in the Common Barnacle Amphibalanus amphitrite |
title_full |
An Investigation of the Effects of Ocean Acidification on Larval Development, Juvenile Settlement and Mortality, Growth, Onset of Egg Production, Shell Integrity and Feeding Activity in the Common Barnacle Amphibalanus amphitrite |
title_fullStr |
An Investigation of the Effects of Ocean Acidification on Larval Development, Juvenile Settlement and Mortality, Growth, Onset of Egg Production, Shell Integrity and Feeding Activity in the Common Barnacle Amphibalanus amphitrite |
title_full_unstemmed |
An Investigation of the Effects of Ocean Acidification on Larval Development, Juvenile Settlement and Mortality, Growth, Onset of Egg Production, Shell Integrity and Feeding Activity in the Common Barnacle Amphibalanus amphitrite |
title_sort |
investigation of the effects of ocean acidification on larval development, juvenile settlement and mortality, growth, onset of egg production, shell integrity and feeding activity in the common barnacle amphibalanus amphitrite |
publisher |
UAB Digital Commons |
publishDate |
2011 |
url |
https://digitalcommons.library.uab.edu/etd-collection/2432 https://digitalcommons.library.uab.edu/context/etd-collection/article/3424/viewcontent/McDonald_uab_0005M_10656.pdf |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
All ETDs from UAB |
op_relation |
https://digitalcommons.library.uab.edu/etd-collection/2432 https://digitalcommons.library.uab.edu/context/etd-collection/article/3424/viewcontent/McDonald_uab_0005M_10656.pdf |
_version_ |
1799486708383744000 |