Species and gamete-specific fertilization success of two sea urchins under near future levels of pCO2 SCIE SCOPUS

Cited 17 time in WEB OF SCIENCE Cited 18 time in Scopus
Title
Species and gamete-specific fertilization success of two sea urchins under near future levels of pCO2
Author(s)
Sung, C.-G.; Kim, T.W.; Park, Y.-G.; Kang, S.-G.; Inaba, K.; Shiba, K.; Choi, T.S.; Moon, S.-D.; Litvin, S.; Lee, K.-T.; Lee, J.-S.
KIOST Author(s)
Park, Young Gyu(박영규)
Publication Year
2014
Abstract
Since the Industrial Revolution, rising atmospheric CO2 concentration has driven an increase in the partial pressure of CO2 in seawater (pCO2), thus lowering ocean pH. We examined the separate effects of exposure of gametes to elevated pCO2 and low pH on fertilization success of the sea urchin Strongylocentrotus nudus. Sperm and eggs were independently exposed to seawater with pCO2 levels ranging from 380 (pH7.96-8.3) to 6000ppmv (pH7.15-7.20). When sperm were exposed, fertilization rate decreased drastically with increased pCO2, even at a concentration of 450ppmv (pH range: 7.94 to 7.96). Conversely, fertilization of Hemicentrotus pulcherrimus was not significantly changed even when sperm was exposed to pCO2 concentrations as high as 750ppmv. Exposure of S. nudus eggs to seawater with high pCO2 did not affect fertilization success, suggesting that the effect of increased pCO2 on sperm is responsible for reduced fertilization success. Surprisingly, this result was not related to sperm motility, which was insensitive to pCO2. When seawater was acidified using HCl, leaving pCO2 constant, fertilization success in S. nudus remained high (>80%) until pH decreased to 7.3. While further studies are required to elucidate the physiological mechanism by which elevated pCO2 impairs sperm and reduces S. nudus fertilization, this study suggests that in the foreseeable future, sea urchin survival may be threatened due to lower fertilization success driven by elevated pCO2 rather than by decreased pH in seawater. © 2014 Elsevier B.V.
ISSN
0924-7963
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/2952
DOI
10.1016/j.jmarsys.2014.04.013
Bibliographic Citation
Journal of Marine Systems, v.137, pp.67 - 73, 2014
Publisher
Elsevier
Subject
Acidification; Carbon dioxide; Mammals; Shellfish; Acidification; Carbon; Carbon dioxide; Mammals; Seawater; Shellfish; Biological fertilization; Fertilization rates; Fertilization success; Industrial revolutions; Marine invertebrates; Partial pressure of co; Physiological mechanisms; Separate effects; Seawater effects; Seawater effects; acidification; carbon dioxide; echinoderm; egg; fertilization (reproduction); gamete; marine ecosystem; reproductive success; seawater; sperm; concentration (composition); future prospect; human activity; hydrochloric acid; industrial practice; partial pressure; pH; survival; Echinoidea; Hemicentrotus pulcherrimus; Invertebrata; Strongylocentrotus nudus
Keywords
Acidification; Biological fertilization; Carbon dioxide; Marine invertebrates
Type
Article
Language
English
Document Type
Article
Publisher
Elsevier
Related Researcher
Research Interests

ocean circulation,ocean mixing,marine debris,해양순환,해양혼합,해양부유물

Files in This Item:
There are no files associated with this item.

qrcode

Items in ScienceWatch@KIOST are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse