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首页> 外文期刊>Marine biology >Latitudinal patterns of shell thickness and metabolism in the eastern oyster Crassostrea virginica along the east coast of North America
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Latitudinal patterns of shell thickness and metabolism in the eastern oyster Crassostrea virginica along the east coast of North America

机译：北美东海岸东部牡蛎Crassostrea virginica的壳厚度和代谢的纬度分布

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摘要

The goal of this study was to quantify growth and metabolic responses of oysters to increased temperatures like those that will occur due to global warming. Impact of temperature on eastern oyster (Crassostrea virginica) shell growth and metabolism was investigated by sampling 24 sites along the eastern North American seaboard ranging from New Brunswick, Canada, to Florida, USA, in March and August 2013. There was a positive correlation between oyster shell thickness and site temperature. At southern sites, shells were up to 65 % thicker than at the northernmost site, likely due to higher precipitation of CaCO_3 in warmer water. This was supported by laboratory experiments showing that thicker shells were produced in response to temperatures 2, 4, and 6 ℃ above ambient seawater temperatures (8-14 ℃) in Connecticut, USA. Field experiments with oyster respiration were conducted during winter and summer at 13 sites to compare responses to thermal stress with latitude. Respiration rates were much higher during summer than winter, but the combination of summer and winter data fell along the same exponential curve with respect to temperature. At all sites, temperature-specific metabolic rates at elevated temperatures were lower than predicted, indicating significant seasonal acclimatization by C. virginica.
机译：这项研究的目的是量化牡蛎对温度升高（例如由于全球变暖而发生的温度）的生长和代谢反应。 2013年3月至2013年8月，通过从加拿大新不伦瑞克省到美国佛罗里达州的北美东部沿海沿岸采样了24个地点，研究了温度对东部牡蛎壳（Crassostrea virginica）生长和代谢的影响。牡蛎壳的厚度和部位温度。在南部站点，壳比最北端的壳厚多达65％，这可能是由于CaCO_3在较暖的水中的沉淀增多。实验室实验证明了这一点，表明在美国康涅狄格州，与环境海水温度（8-14℃）相比，温度分别高出2、4和6℃时，会产生更厚的壳。在冬季和夏季，在13个地点进行了牡蛎呼吸的野外实验，比较了纬度对热应力的响应。夏季的呼吸速率比冬季高得多，但夏季和冬季数据的组合相对于温度沿相同的指数曲线下降。在所有地点，升高的温度下特定于温度的代谢率均低于预期值，表明维吉尼亚衣原体显着的季节性适应。

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  • 来源
    《Marine biology》 |2014年第7期|1487-1497|共11页
  • 作者

    Joshua Lord; Robert Whitlatch;

  • 作者单位

    Department of Marine Science, University of Connecticut, 1080 Shennecossett Road, Groton, CT 06340, USA;

    Department of Marine Science, University of Connecticut, 1080 Shennecossett Road, Groton, CT 06340, USA;

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