Image_1_Assessing the Impacts of Ocean Acidification on Adhesion and Shell Formation in the Barnacle Amphibalanus amphitrite.PDF
Barnacles are dominant members of marine intertidal communities. Their success depends on firm attachment provided by their proteinaceous adhesive and protection imparted by their calcified shell plates. Little is known about how variations in the environment affect adhesion and shell formation proc...
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ftfrontimediafig:oai:figshare.com:article/7234340 2023-05-15T17:51:06+02:00 Image_1_Assessing the Impacts of Ocean Acidification on Adhesion and Shell Formation in the Barnacle Amphibalanus amphitrite.PDF Jessica A. Nardone Shrey Patel Kyle R. Siegel Dana Tedesco Conall G. McNicholl Jessica O’Malley Jack Herrick Rebecca A. Metzler Beatriz Orihuela Daniel Rittschof Gary H. Dickinson 2018-10-22T04:02:28Z https://doi.org/10.3389/fmars.2018.00369.s002 https://figshare.com/articles/Image_1_Assessing_the_Impacts_of_Ocean_Acidification_on_Adhesion_and_Shell_Formation_in_the_Barnacle_Amphibalanus_amphitrite_PDF/7234340 unknown doi:10.3389/fmars.2018.00369.s002 https://figshare.com/articles/Image_1_Assessing_the_Impacts_of_Ocean_Acidification_on_Adhesion_and_Shell_Formation_in_the_Barnacle_Amphibalanus_amphitrite_PDF/7234340 CC BY 4.0 CC-BY Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering biomineralization climate change mechanical properties biofouling cement adhesive tenacity calcite Balanus Image Figure 2018 ftfrontimediafig https://doi.org/10.3389/fmars.2018.00369.s002 2018-10-24T22:58:04Z Barnacles are dominant members of marine intertidal communities. Their success depends on firm attachment provided by their proteinaceous adhesive and protection imparted by their calcified shell plates. Little is known about how variations in the environment affect adhesion and shell formation processes in barnacles. Increased levels of atmospheric CO 2 have led to a reduction in the pH of ocean waters (i.e., ocean acidification), a trend that is expected to continue into the future. Here, we assessed if a reduction in seawater pH, at levels predicted within the next 200 years, would alter physiology, adhesion, and shell formation in the cosmopolitan barnacle Amphibalanus (=Balanus) amphitrite. Juvenile barnacles, settled on silicone substrates, were exposed to one of three static levels of pH T , 8.01, 7.78, or 7.50, for 13 weeks. We found that barnacles were robust to reduced pH, with no effect of pH on physiological metrics (mortality, tissue mass, and presence of eggs). Likewise, adhesive properties (adhesion strength and adhesive plaque gross morphology) were not affected by reduced pH. Shell formation, however, was affected by seawater pH. Shell mass and base plate area were higher in barnacles exposed to reduced pH; barnacles grown at pH T 8.01 exhibited approximately 30% lower shell mass and 20% smaller base plate area as compared to those at pH T 7.50 or 7.78. Enhanced growth at reduced pH appears to be driven by the increased size of the calcite crystals that comprise the shell. Despite enhanced growth, mechanical properties of the base plate (but not the parietal plates) were compromised at the lowest pH level. Barnacle base plates at pH T 7.50 broke more easily and crack propagation, measured through microhardness testing, was significantly affected by seawater pH. Other shell metrics (plate thickness, relative crystallinity, and atomic disorder) were not affected by seawater pH. Hence, a reduction in pH resulted in larger barnacles but with base plates that would crack more readily. It is yet to be ... Still Image Ocean acidification Frontiers: Figshare |
institution |
Open Polar |
collection |
Frontiers: Figshare |
op_collection_id |
ftfrontimediafig |
language |
unknown |
topic |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering biomineralization climate change mechanical properties biofouling cement adhesive tenacity calcite Balanus |
spellingShingle |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering biomineralization climate change mechanical properties biofouling cement adhesive tenacity calcite Balanus Jessica A. Nardone Shrey Patel Kyle R. Siegel Dana Tedesco Conall G. McNicholl Jessica O’Malley Jack Herrick Rebecca A. Metzler Beatriz Orihuela Daniel Rittschof Gary H. Dickinson Image_1_Assessing the Impacts of Ocean Acidification on Adhesion and Shell Formation in the Barnacle Amphibalanus amphitrite.PDF |
topic_facet |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering biomineralization climate change mechanical properties biofouling cement adhesive tenacity calcite Balanus |
description |
Barnacles are dominant members of marine intertidal communities. Their success depends on firm attachment provided by their proteinaceous adhesive and protection imparted by their calcified shell plates. Little is known about how variations in the environment affect adhesion and shell formation processes in barnacles. Increased levels of atmospheric CO 2 have led to a reduction in the pH of ocean waters (i.e., ocean acidification), a trend that is expected to continue into the future. Here, we assessed if a reduction in seawater pH, at levels predicted within the next 200 years, would alter physiology, adhesion, and shell formation in the cosmopolitan barnacle Amphibalanus (=Balanus) amphitrite. Juvenile barnacles, settled on silicone substrates, were exposed to one of three static levels of pH T , 8.01, 7.78, or 7.50, for 13 weeks. We found that barnacles were robust to reduced pH, with no effect of pH on physiological metrics (mortality, tissue mass, and presence of eggs). Likewise, adhesive properties (adhesion strength and adhesive plaque gross morphology) were not affected by reduced pH. Shell formation, however, was affected by seawater pH. Shell mass and base plate area were higher in barnacles exposed to reduced pH; barnacles grown at pH T 8.01 exhibited approximately 30% lower shell mass and 20% smaller base plate area as compared to those at pH T 7.50 or 7.78. Enhanced growth at reduced pH appears to be driven by the increased size of the calcite crystals that comprise the shell. Despite enhanced growth, mechanical properties of the base plate (but not the parietal plates) were compromised at the lowest pH level. Barnacle base plates at pH T 7.50 broke more easily and crack propagation, measured through microhardness testing, was significantly affected by seawater pH. Other shell metrics (plate thickness, relative crystallinity, and atomic disorder) were not affected by seawater pH. Hence, a reduction in pH resulted in larger barnacles but with base plates that would crack more readily. It is yet to be ... |
format |
Still Image |
author |
Jessica A. Nardone Shrey Patel Kyle R. Siegel Dana Tedesco Conall G. McNicholl Jessica O’Malley Jack Herrick Rebecca A. Metzler Beatriz Orihuela Daniel Rittschof Gary H. Dickinson |
author_facet |
Jessica A. Nardone Shrey Patel Kyle R. Siegel Dana Tedesco Conall G. McNicholl Jessica O’Malley Jack Herrick Rebecca A. Metzler Beatriz Orihuela Daniel Rittschof Gary H. Dickinson |
author_sort |
Jessica A. Nardone |
title |
Image_1_Assessing the Impacts of Ocean Acidification on Adhesion and Shell Formation in the Barnacle Amphibalanus amphitrite.PDF |
title_short |
Image_1_Assessing the Impacts of Ocean Acidification on Adhesion and Shell Formation in the Barnacle Amphibalanus amphitrite.PDF |
title_full |
Image_1_Assessing the Impacts of Ocean Acidification on Adhesion and Shell Formation in the Barnacle Amphibalanus amphitrite.PDF |
title_fullStr |
Image_1_Assessing the Impacts of Ocean Acidification on Adhesion and Shell Formation in the Barnacle Amphibalanus amphitrite.PDF |
title_full_unstemmed |
Image_1_Assessing the Impacts of Ocean Acidification on Adhesion and Shell Formation in the Barnacle Amphibalanus amphitrite.PDF |
title_sort |
image_1_assessing the impacts of ocean acidification on adhesion and shell formation in the barnacle amphibalanus amphitrite.pdf |
publishDate |
2018 |
url |
https://doi.org/10.3389/fmars.2018.00369.s002 https://figshare.com/articles/Image_1_Assessing_the_Impacts_of_Ocean_Acidification_on_Adhesion_and_Shell_Formation_in_the_Barnacle_Amphibalanus_amphitrite_PDF/7234340 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
doi:10.3389/fmars.2018.00369.s002 https://figshare.com/articles/Image_1_Assessing_the_Impacts_of_Ocean_Acidification_on_Adhesion_and_Shell_Formation_in_the_Barnacle_Amphibalanus_amphitrite_PDF/7234340 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/fmars.2018.00369.s002 |
_version_ |
1766158127255781376 |