

FOLLOWUS
1.Key Laboratory of Mariculture & Stock Enhancement in North China's Sea, Ministry of Agriculture, Dalian Ocean University, Dalian 116023, China
2.College of Basic Medical Science, Dalian Medical University, Dalian 116044, China
CHANG Yaqing, yqkeylab@hotmail.com
收稿:2016-12-17,
录用:2017-2-3,
网络首发:2017-06-12,
纸质出版:2018-07
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湛垚垚, 胡婉彬, 段立柱, 等. Effects of seawater acidification on the early development of sea urchin
Yaoyao ZHAN, Wanbin HU, Lizhu DUAN, et al. Effects of seawater acidification on the early development of sea urchin
湛垚垚, 胡婉彬, 段立柱, 等. Effects of seawater acidification on the early development of sea urchin
Yaoyao ZHAN, Wanbin HU, Lizhu DUAN, et al. Effects of seawater acidification on the early development of sea urchin
In this study
we evaluated the effects of CO
2
-induced seawater acidification on fertilization
embryogenesis and early larval development in the sea urchin
Glyptocidaris crenularis
that inhabits subtidal coastal areas in northern China. The range in seawater pH used in experiments was based on the projections of the Intergovernmental Panel on Climate Change (IPCC)
to the year 2100. A natural seawater treatment (pH
nbs
=7.98±0.03) and three laboratory-controlled acidified treatments (OA
1
ΔpH
nbs
=-0.3 units; OA
2
ΔpH
nbs
=-0.4 units; OA
3
ΔpH
nbs
=-0.5 units) were used in experiments. Results show that:(1) there was a negative effect of seawater acidification on fertilization and on the percentage of abnormal fertilized eggs; (2) the size of early cleavage stage embryos decreased in a dose-dependent manner with decreasing pH; (3) both the hatching rate of blastulae and the survival rate of four-armed pluteus larvae decreased as pH declined; (4) larval abnormalities including asymmetrical development
changes in the length of skeletal elements
and corroded spicules were observed in all seawater acidified-treatments compared with the control. These data indicate that seawater acidification has a negative impact on the early development of
G. crenularis
and supports the hypothesis that the response of echinoderms to ocean acidification (OA) varies among species. Further research is required to clarify the specific cellular mechanisms involved.
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