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首页> 外文期刊>Paleoceanography >Experimental determination of salinity, temperature, growth, and metabolic effects on shell isotope chemistry of Mytilus edulis collected from Maine and Greenland
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Experimental determination of salinity, temperature, growth, and metabolic effects on shell isotope chemistry of Mytilus edulis collected from Maine and Greenland

机译：盐度，温度，生长和代谢对从缅因州和格陵兰岛采集的可食用的Mytilus edulis壳同位素化学的影响的实验测定

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摘要

To study the effects of temperature, salinity, and life processes (growth rates, size, metabolic effects, and physiological/ genetic effects) on newly precipitated bivalve carbonate, we quantified shell isotopic chemistry of adult and juvenile animals of the intertidal bivalve Mytilus edulis (Blue mussel) collected alive from western Greenland and the central Gulf of Maine and cultured them under controlled conditions. Data for juvenile and adult M. edulis bivalves cultured in this study, and previously by Wanamaker et al. (2006), yielded statistically identical paleotemperature relationships. On the basis of these experiments we have developed a species-specific paleotemperature equation for the bivalve M. edulis [T degrees C = 16.28 (+/- 0.10) -4.57 (+/- 0.15) {delta O-18(c) VPBD - delta O-18(w) VSMOW} + 0.06 (+/- 0.06) {delta O-18(c) VPBD - delta O-18(w) VSMOW}(2); r(2) = 0.99; N = 323; p < 0.0001]. Compared to the Kim and O'Neil (1997) inorganic calcite equation, M. edulis deposits its shell in isotope equilibrium (delta O-18(calcite)) with ambient water. Carbon isotopes (delta C-13(calcite)) from sampled shells were substantially more negative than predicted values, indicating an uptake of metabolic carbon into shell carbonate, and delta C-13(calcite) disequilibrium increased with increasing salinity. Sampled shells of M. edulis showed no significant trends in delta O-18(calcite) based on size, cultured growth rates, or geographic collection location, suggesting that vital effects do not affect delta O-18(calcite) in M. edulis. The broad modern and paleogeographic distribution of this bivalve, its abundance during the Holocene, and the lack of an intraspecies physiologic isotope effect demonstrated here make it an ideal nearshore paleoceanographic proxy throughout much of the North Atlantic Ocean.
机译：为了研究温度，盐度和生命过程（生长速率，大小，代谢效应以及生理/遗传效应）对新沉淀的双壳类碳酸盐的影响，我们量化了潮间双壳类Mytilus edulis的成年和幼年动物的壳同位素化学（蓝贻贝（活体）从格陵兰岛西部和缅因州中部海湾活着采集，并在受控条件下进行养殖。 Wanamaker等人先前在本研究中培养的幼年和成年蓝靛果双壳类动物的数据。 （2006年），产生了统计上相同的古温度关系。在这些实验的基础上，我们开发了双壳双歧杆菌的特定物种古温度方程[T摄氏度= 16.28（+/- 0.10）-4.57（+/- 0.15）{δO-18（c）VPBD -三角O-18（w）VSMOW} + 0.06（+/- 0.06）{三角O-18（c）VPBD-三角O-18（w）VSMOW}（2）; r（2）= 0.99; N = 323; p <0.0001]。与Kim和O'Neil（1997）的无机方解石方程相比，可食蓝藻将其壳沉积在环境水的同位素平衡下（δO-18（方解石））。采样壳中的碳同位素（δC-13（方解石））基本上比预期值更负，表明代谢碳被壳碳酸盐吸收，δC-13（方解石）的不平衡度随盐度的增加而增加。基于大小，培养的生长速率或地理位置，取样的蓝靛果壳未显示出明显的O-18（方解石）趋势，这表明重要的影响不会影响蓝靛果中的O-18（方解石）。该双壳类的广泛的现代和古地理分布，全新世期间的丰度以及缺乏种内生理同位素效应，证明了它是整个北大西洋大部分地区的理想近岸古海洋代用物。

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