Growth and Development of Larval Bay Scallops (Argopecten irradians) in Response to Early Exposure to High CO2
Coastal and estuarine environments experience large variability and rapid shifts in pCO2 levels. Elevated pCO2, or ocean acidification, often negatively affects early life stages of calcifying marine invertebrates, including bivalves, but it is unclear which developmental stage is most sensitive. I...
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ftdtic:ADA573596 2023-05-15T17:51:00+02:00 Growth and Development of Larval Bay Scallops (Argopecten irradians) in Response to Early Exposure to High CO2 White, Meredith M MASSACHUSETTS INST OF TECH CAMBRIDGE JOINT PROGRAM IN APPLIED OCEAN SCIENCE AND ENGINEERING 2013-02 text/html http://www.dtic.mil/docs/citations/ADA573596 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA573596 en eng http://www.dtic.mil/docs/citations/ADA573596 Approved for public release; distribution is unlimited. DTIC Biological Oceanography Hydrology Limnology and Potamology Water Pollution and Control *SHELLFISH *WATER CHEMISTRY CALCIFICATION CARBON DIOXIDE CLIMATE CHANGE ESTUARIES HYPERCAPNIA LARVAE LIFE SPAN(BIOLOGY) STATISTICAL ANALYSIS BAY SCALLOPS OCEAN ACIDIFICATION SHELL GROWTH Text 2013 ftdtic 2016-02-24T10:20:34Z Coastal and estuarine environments experience large variability and rapid shifts in pCO2 levels. Elevated pCO2, or ocean acidification, often negatively affects early life stages of calcifying marine invertebrates, including bivalves, but it is unclear which developmental stage is most sensitive. I hypothesized that initial calcification is a critical stage during which high pCO2 exposure has severe effects on larval growth and development of bay scallop (Argopecten irradians). Using five experiments varying the timing of exposure of embryonic and larval bay scallops to high CO2, this thesis identifies two distinct stages of development during which exposure to high CO2/low pH causes different effects on bay scallop larvae. I show that any exposure to high CO2 consistently reduces survival of bay scallop larvae. I also show that high CO2 exposure during initial calcification (12-24 h post- fertilization) results in significantly smaller shells, relative to ambient conditions, and this size decrease persists through the first week of development. High CO2 exposure at 2-12 h post-fertilization (pre-calcification), does not impact shell size, suggesting that the CO2 impact on size is a consequence of water chemistry during calcification. However, high CO2 exposure prior to shell formation (2-12 h post-fertilization) causes a high incidence of larval shell deformity, regardless of CO2 conditions during initial calcification. This impact does not occur in response to high CO2 exposure after the 2-12 h period. The observations of two critical stages in early development has implications for both field and hatchery populations. If field populations were able to time their spawning to occur during the night, larvae would undergo initial calcification during the daytime, when CO2 conditions are more favorable, resulting in larger veliger larvae. Sponsored in part by NSF. The original document contains color images. Text Ocean acidification Defense Technical Information Center: DTIC Technical Reports database |
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Defense Technical Information Center: DTIC Technical Reports database |
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language |
English |
topic |
Biological Oceanography Hydrology Limnology and Potamology Water Pollution and Control *SHELLFISH *WATER CHEMISTRY CALCIFICATION CARBON DIOXIDE CLIMATE CHANGE ESTUARIES HYPERCAPNIA LARVAE LIFE SPAN(BIOLOGY) STATISTICAL ANALYSIS BAY SCALLOPS OCEAN ACIDIFICATION SHELL GROWTH |
spellingShingle |
Biological Oceanography Hydrology Limnology and Potamology Water Pollution and Control *SHELLFISH *WATER CHEMISTRY CALCIFICATION CARBON DIOXIDE CLIMATE CHANGE ESTUARIES HYPERCAPNIA LARVAE LIFE SPAN(BIOLOGY) STATISTICAL ANALYSIS BAY SCALLOPS OCEAN ACIDIFICATION SHELL GROWTH White, Meredith M Growth and Development of Larval Bay Scallops (Argopecten irradians) in Response to Early Exposure to High CO2 |
topic_facet |
Biological Oceanography Hydrology Limnology and Potamology Water Pollution and Control *SHELLFISH *WATER CHEMISTRY CALCIFICATION CARBON DIOXIDE CLIMATE CHANGE ESTUARIES HYPERCAPNIA LARVAE LIFE SPAN(BIOLOGY) STATISTICAL ANALYSIS BAY SCALLOPS OCEAN ACIDIFICATION SHELL GROWTH |
description |
Coastal and estuarine environments experience large variability and rapid shifts in pCO2 levels. Elevated pCO2, or ocean acidification, often negatively affects early life stages of calcifying marine invertebrates, including bivalves, but it is unclear which developmental stage is most sensitive. I hypothesized that initial calcification is a critical stage during which high pCO2 exposure has severe effects on larval growth and development of bay scallop (Argopecten irradians). Using five experiments varying the timing of exposure of embryonic and larval bay scallops to high CO2, this thesis identifies two distinct stages of development during which exposure to high CO2/low pH causes different effects on bay scallop larvae. I show that any exposure to high CO2 consistently reduces survival of bay scallop larvae. I also show that high CO2 exposure during initial calcification (12-24 h post- fertilization) results in significantly smaller shells, relative to ambient conditions, and this size decrease persists through the first week of development. High CO2 exposure at 2-12 h post-fertilization (pre-calcification), does not impact shell size, suggesting that the CO2 impact on size is a consequence of water chemistry during calcification. However, high CO2 exposure prior to shell formation (2-12 h post-fertilization) causes a high incidence of larval shell deformity, regardless of CO2 conditions during initial calcification. This impact does not occur in response to high CO2 exposure after the 2-12 h period. The observations of two critical stages in early development has implications for both field and hatchery populations. If field populations were able to time their spawning to occur during the night, larvae would undergo initial calcification during the daytime, when CO2 conditions are more favorable, resulting in larger veliger larvae. Sponsored in part by NSF. The original document contains color images. |
author2 |
MASSACHUSETTS INST OF TECH CAMBRIDGE JOINT PROGRAM IN APPLIED OCEAN SCIENCE AND ENGINEERING |
format |
Text |
author |
White, Meredith M |
author_facet |
White, Meredith M |
author_sort |
White, Meredith M |
title |
Growth and Development of Larval Bay Scallops (Argopecten irradians) in Response to Early Exposure to High CO2 |
title_short |
Growth and Development of Larval Bay Scallops (Argopecten irradians) in Response to Early Exposure to High CO2 |
title_full |
Growth and Development of Larval Bay Scallops (Argopecten irradians) in Response to Early Exposure to High CO2 |
title_fullStr |
Growth and Development of Larval Bay Scallops (Argopecten irradians) in Response to Early Exposure to High CO2 |
title_full_unstemmed |
Growth and Development of Larval Bay Scallops (Argopecten irradians) in Response to Early Exposure to High CO2 |
title_sort |
growth and development of larval bay scallops (argopecten irradians) in response to early exposure to high co2 |
publishDate |
2013 |
url |
http://www.dtic.mil/docs/citations/ADA573596 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA573596 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
DTIC |
op_relation |
http://www.dtic.mil/docs/citations/ADA573596 |
op_rights |
Approved for public release; distribution is unlimited. |
_version_ |
1766157959099842560 |