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Effects of ocean acidification on the early developmental stages of the horned turban, Turbo cornutus

机译：海洋酸化对有角头巾Turn cornutus早期发育的影响

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摘要

To estimate the impact of CO_2-driven ocean acidification on the early life stages of gastropods, the effects of increased partial pressure of seawater carbon dioxide (pCO_2) (800-2,000 μatm) on the early developmental stages and larval shell length of the commercially important gastropod, the horned turban snail, Turbo cornutus were investigated. Increase in experimental seawater pCO_2 had an increasingly negative impact on the early developmental rate; the proportion of embryos or larvae displaying retarded development increased at higher pCO_2. The proportion of embryos that developed to the 4-cell stage at 2 h after fertilization decreased linearly with increasing pCO_2. At ～ 1,000 μatm pCO_2, retarded development was observed in ～50 % of larvae. No embryos developed to the 4-cell stage at 2,000 μatm pCO_2 within 2 h of fertilization. A similar trend continued until 24-26 h after fertilization; the proportion of larvae attaining veliger stage by 24-26 h also decreased with increasing pCO_2. The shell length of T. cornutus veligers decreased gradually as seawater pCO_2 increased, but markedly decreased in sea-water under nearly unsaturated and unsaturated conditions (≤1.04) of the aragonite saturation state (Ω_(aragonite))- The results indicate that increased pCO_2 seawater has a progressive and acute effect on embryonic and larval T. cornutus, and imply that the extended early developmental period and/or the downsized larval shell produced by ocean acidification will have a negative impact on survival, settlement and recruitment well into the future.
机译：为了估计CO_2驱动的海洋酸化对腹足动物生命早期的影响，海水二氧化碳分压（pCO_2）（800-2,000μatm）的升高对商业上重要的幼体阶段和幼体壳长的影响对腹足动物，角状蜗牛，Turbocornutus进行了调查。实验海水pCO_2的增加对早期发育速率的负面影响越来越大； pCO_2较高时，发育受阻的胚或幼虫的比例增加。受精后2 h发育到4细胞阶段的胚胎比例随pCO_2的增加呈线性下降。在〜1,000μatmpCO_2下，在〜50％的幼虫中观察到发育迟缓。受精后2小时内，在2,000μatmpCO_2下没有胚胎发育到4细胞阶段。相似的趋势一直持续到受精后24-26小时。随着pCO_2的增加，幼虫到24-26 h达到成熟阶段的比例也降低。随着海水pCO_2的增加，角果的壳长逐渐减小，但在文石饱和状态（Ω_（文石））的近乎不饱和和不饱和条件下（≤1.04），海水中壳长显着减小-结果表明，pCO_2增加海水对胚胎和幼体角膜红球菌具有渐进性和急性作用，这意味着延长的早期发育期和/或海洋酸化产生的幼体壳尺寸减小，将对未来的生存，定居和募集产生负面影响。

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  • 来源
    《Marine biology》 |2014年第5期|1127-1138|共12页
  • 作者

    Toshihiro Onitsuka; Ryo Kimura; Tsuneo Ono; Hideki Takami; Yukihiro Nojiri;

  • 作者单位

    National Research Institute of Aquaculture (Yokosuka Station),Fisheries Research Agency, 6-31-1 Nagai, Yokosuka,Kanagawa 238-0316, Japan,Hokkaido National Fisheries Research Institute,Fisheries Research Agency, 116 Katsurakoi, Kushiro,Hokkaido 085-0802, Japan;

    National Research Institute of Aquaculture (Yokosuka Station),Fisheries Research Agency, 6-31-1 Nagai, Yokosuka,Kanagawa 238-0316, Japan,Fisheries Research Agency, 15F Queen's Tower B, 2-3-3 Minato Mirai, Nishi-ku, Yokohama, Kanagawa 220-6115, Japan;

    National Research Institute of Fisheries Science, Fisheries Research Agency, 2-12-4 Fukuura, Kanazawa-ku, Yokohama,Kanagawa 236-8648, Japan;

    Tohoku National Fisheries Research Institute, Fisheries Research Agency, 3-27-5 Shinhama, Shiogama, Miyagi 985-0001, Japan;

    Center for Global Environment Research, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba,Ibaraki 305-8506, Japan;

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