Effects of sea-water acidification on fertilization and larval development of the oyster Crassostrea gigas
Oceans face a serious change to their natural biogeochemical cycle due to the rapid absorption of CO2 generated by human activities. Ocean acidification is the common term used to describe the decrease of seawater pH caused by the absorption of atmospheric CO2. To evaluate the effects of ocean acidi...
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ftunivalgarve:oai:sapientia.ualg.pt:10400.1/5042 2023-05-15T15:58:15+02:00 Effects of sea-water acidification on fertilization and larval development of the oyster Crassostrea gigas Barros, P. Sobral, P. Range, Pedro Chícharo, Luís Matias, Domitília 2014-09-19T09:56:36Z http://hdl.handle.net/10400.1/5042 por por Barros, P.; Sobral, P.; Range, Pedro; Chícharo, Luís; Matias, Domitília. Effects of sea-water acidification on fertilization and larval development of the oyster Crassostrea gigas, Journal of Experimental Marine Biology and Ecology, 440, n/a, 200-206, 2013. 0022-0981 AUT: LCH00360; http://hdl.handle.net/10400.1/5042 restrictedAccess Bivalvia Japanese oyster Carbon dioxide Ostreida Climate change Coastal ocean article 2014 ftunivalgarve 2022-05-30T08:46:07Z Oceans face a serious change to their natural biogeochemical cycle due to the rapid absorption of CO2 generated by human activities. Ocean acidification is the common term used to describe the decrease of seawater pH caused by the absorption of atmospheric CO2. To evaluate the effects of ocean acidification, we focused on the larval stage of bivalves, which produce a fragile calcareous skeletal structure, very sensitive to changes in seawater chemistry. In this context, we investigated sperm motility, fertilization rate and larval viability (survival, growth and abnormalities) of the Pacific oyster, Crassostrea gigas, a commercially important bivalve, in a controlled CO2 perturbation experiment. The carbonate chemistry of seawater was manipulated by diffusing pure CO2, to attain two reduced pH levels (ΔpH=−0.4 and ΔpH=−0.7) which were compared to unmanipulated seawater. The results show high sensitivity of C. gigas veliger larvae to low values of pH, as reflected by a decrease in survival and growth rates, as well as an increased frequency of prodissoconch abnormalities and protruding mantle. Moreover, results also show that sperm motility, fertilization rate, and hatching success, were negatively influenced by acidification. The exposure to ΔpH=−0.7 had a higher impact on the fertilization and larval viability than ΔpH=−0.4. The results suggest that the reproductive success and the biological mechanisms for calcification may be prematurely interrupted and disturbed when C. gigas veliger larvae are exposed to an acidified environment which may reduce their viability and compromise settlement and future abundances of this species. Article in Journal/Newspaper Crassostrea gigas Ocean acidification Pacific oyster Universidade do Algarve: Sapienta Pacific |
institution |
Open Polar |
collection |
Universidade do Algarve: Sapienta |
op_collection_id |
ftunivalgarve |
language |
Portuguese |
topic |
Bivalvia Japanese oyster Carbon dioxide Ostreida Climate change Coastal ocean |
spellingShingle |
Bivalvia Japanese oyster Carbon dioxide Ostreida Climate change Coastal ocean Barros, P. Sobral, P. Range, Pedro Chícharo, Luís Matias, Domitília Effects of sea-water acidification on fertilization and larval development of the oyster Crassostrea gigas |
topic_facet |
Bivalvia Japanese oyster Carbon dioxide Ostreida Climate change Coastal ocean |
description |
Oceans face a serious change to their natural biogeochemical cycle due to the rapid absorption of CO2 generated by human activities. Ocean acidification is the common term used to describe the decrease of seawater pH caused by the absorption of atmospheric CO2. To evaluate the effects of ocean acidification, we focused on the larval stage of bivalves, which produce a fragile calcareous skeletal structure, very sensitive to changes in seawater chemistry. In this context, we investigated sperm motility, fertilization rate and larval viability (survival, growth and abnormalities) of the Pacific oyster, Crassostrea gigas, a commercially important bivalve, in a controlled CO2 perturbation experiment. The carbonate chemistry of seawater was manipulated by diffusing pure CO2, to attain two reduced pH levels (ΔpH=−0.4 and ΔpH=−0.7) which were compared to unmanipulated seawater. The results show high sensitivity of C. gigas veliger larvae to low values of pH, as reflected by a decrease in survival and growth rates, as well as an increased frequency of prodissoconch abnormalities and protruding mantle. Moreover, results also show that sperm motility, fertilization rate, and hatching success, were negatively influenced by acidification. The exposure to ΔpH=−0.7 had a higher impact on the fertilization and larval viability than ΔpH=−0.4. The results suggest that the reproductive success and the biological mechanisms for calcification may be prematurely interrupted and disturbed when C. gigas veliger larvae are exposed to an acidified environment which may reduce their viability and compromise settlement and future abundances of this species. |
format |
Article in Journal/Newspaper |
author |
Barros, P. Sobral, P. Range, Pedro Chícharo, Luís Matias, Domitília |
author_facet |
Barros, P. Sobral, P. Range, Pedro Chícharo, Luís Matias, Domitília |
author_sort |
Barros, P. |
title |
Effects of sea-water acidification on fertilization and larval development of the oyster Crassostrea gigas |
title_short |
Effects of sea-water acidification on fertilization and larval development of the oyster Crassostrea gigas |
title_full |
Effects of sea-water acidification on fertilization and larval development of the oyster Crassostrea gigas |
title_fullStr |
Effects of sea-water acidification on fertilization and larval development of the oyster Crassostrea gigas |
title_full_unstemmed |
Effects of sea-water acidification on fertilization and larval development of the oyster Crassostrea gigas |
title_sort |
effects of sea-water acidification on fertilization and larval development of the oyster crassostrea gigas |
publishDate |
2014 |
url |
http://hdl.handle.net/10400.1/5042 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Crassostrea gigas Ocean acidification Pacific oyster |
genre_facet |
Crassostrea gigas Ocean acidification Pacific oyster |
op_relation |
Barros, P.; Sobral, P.; Range, Pedro; Chícharo, Luís; Matias, Domitília. Effects of sea-water acidification on fertilization and larval development of the oyster Crassostrea gigas, Journal of Experimental Marine Biology and Ecology, 440, n/a, 200-206, 2013. 0022-0981 AUT: LCH00360; http://hdl.handle.net/10400.1/5042 |
op_rights |
restrictedAccess |
_version_ |
1766393976699486208 |