Limits to Diffusive O 2 Transport: Flow, Form, and Function in Nudibranch Egg Masses from Temperate and Polar Regions
Background: Many aquatic animals enclose embryos in gelatinous masses, and these embryos rely on diffusion to supply oxygen. Mass structure plays an important role in limiting or facilitating O2 supply, but external factors such as temperature and photosynthesis can play important roles as well. Oth...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.351.5978 2023-05-15T13:42:36+02:00 Limits to Diffusive O 2 Transport: Flow, Form, and Function in Nudibranch Egg Masses from Temperate and Polar Regions Amy L. Moran H. Arthur Woods The Pennsylvania State University CiteSeerX Archives 2010 application/zip http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.351.5978 en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.351.5978 Metadata may be used without restrictions as long as the oai identifier remains attached to it. ftp://ftp.ncbi.nlm.nih.gov/pub/pmc/7b/01/PLoS_One_2010_Aug_11_5(8)_e12113.tar.gz text 2010 ftciteseerx 2016-01-08T00:22:31Z Background: Many aquatic animals enclose embryos in gelatinous masses, and these embryos rely on diffusion to supply oxygen. Mass structure plays an important role in limiting or facilitating O2 supply, but external factors such as temperature and photosynthesis can play important roles as well. Other external factors are less well understood. Methodology/Principal Findings: We first explored the effects of water flow on O2 levels inside nudibranch embryo masses and compared the effects of flow on masses from temperate and polar regions. Water flow (still vs. vigorously bubbled) had a strong effect on central O2 levels in all masses; in still water, masses were considerably more hypoxic than in bubbled water. This effect was stronger in temperate than in polar masses, likely due to the increased metabolic demand and O2 consumption of temperate masses. Second, we made what are to our knowledge the first measurements of O2 in invertebrate masses in the field. Consistent with laboratory experiments, O 2 in Antarctic masses was high in masses in situ, suggesting that boundary-layer effects do not substantially limit O2 supply to polar embryos in the field. Conclusions/Significance: All else being equal, boundary layers are more likely to depress O2 in masses in temperate or tropical regions; thus, selection on parents to choose high-flow sites for mass deposition is likely greater in warm water. Because of the large number of variables affecting diffusive O 2 supply to embryos in their natural environment, field Text Antarc* Antarctic Unknown Antarctic |
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Background: Many aquatic animals enclose embryos in gelatinous masses, and these embryos rely on diffusion to supply oxygen. Mass structure plays an important role in limiting or facilitating O2 supply, but external factors such as temperature and photosynthesis can play important roles as well. Other external factors are less well understood. Methodology/Principal Findings: We first explored the effects of water flow on O2 levels inside nudibranch embryo masses and compared the effects of flow on masses from temperate and polar regions. Water flow (still vs. vigorously bubbled) had a strong effect on central O2 levels in all masses; in still water, masses were considerably more hypoxic than in bubbled water. This effect was stronger in temperate than in polar masses, likely due to the increased metabolic demand and O2 consumption of temperate masses. Second, we made what are to our knowledge the first measurements of O2 in invertebrate masses in the field. Consistent with laboratory experiments, O 2 in Antarctic masses was high in masses in situ, suggesting that boundary-layer effects do not substantially limit O2 supply to polar embryos in the field. Conclusions/Significance: All else being equal, boundary layers are more likely to depress O2 in masses in temperate or tropical regions; thus, selection on parents to choose high-flow sites for mass deposition is likely greater in warm water. Because of the large number of variables affecting diffusive O 2 supply to embryos in their natural environment, field |
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The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Amy L. Moran H. Arthur Woods |
spellingShingle |
Amy L. Moran H. Arthur Woods Limits to Diffusive O 2 Transport: Flow, Form, and Function in Nudibranch Egg Masses from Temperate and Polar Regions |
author_facet |
Amy L. Moran H. Arthur Woods |
author_sort |
Amy L. Moran |
title |
Limits to Diffusive O 2 Transport: Flow, Form, and Function in Nudibranch Egg Masses from Temperate and Polar Regions |
title_short |
Limits to Diffusive O 2 Transport: Flow, Form, and Function in Nudibranch Egg Masses from Temperate and Polar Regions |
title_full |
Limits to Diffusive O 2 Transport: Flow, Form, and Function in Nudibranch Egg Masses from Temperate and Polar Regions |
title_fullStr |
Limits to Diffusive O 2 Transport: Flow, Form, and Function in Nudibranch Egg Masses from Temperate and Polar Regions |
title_full_unstemmed |
Limits to Diffusive O 2 Transport: Flow, Form, and Function in Nudibranch Egg Masses from Temperate and Polar Regions |
title_sort |
limits to diffusive o 2 transport: flow, form, and function in nudibranch egg masses from temperate and polar regions |
publishDate |
2010 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.351.5978 |
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Antarctic |
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Antarctic |
genre |
Antarc* Antarctic |
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Antarc* Antarctic |
op_source |
ftp://ftp.ncbi.nlm.nih.gov/pub/pmc/7b/01/PLoS_One_2010_Aug_11_5(8)_e12113.tar.gz |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.351.5978 |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766170064225042432 |