The effects of environment on Arctica islandica shell formation and architecture
The effects of environment on Arctica islandica shell formation and architecture
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环境对北极贝壳形成和结构的影响
DOI：
10.5194/bg-14-1577-2017
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发表时间：
2016
期刊：
影响因子：
4.9
通讯作者：
B. Schöne
中科院分区：
文献类型：
--
作者：
Stefania Milano;G. Nehrke;A. Wanamaker;Irene Ballesta;T. Brey;B. Schöne
抽象的。软体动物在其坚硬的部分记录有价值的信息，反映周围的环境条件。因此，贝壳可以作为重建过去气候和环境变化的极好档案。然而，动物生理学和生物矿化，这往往是知之甚少，可以使环境信号的解码具有挑战性的任务。许多常规使用的基于外壳的代理对多种不同的环境和生理变量敏感。因此，识别和解释单个环境信号（例如，水温）通常特别困难。不受多种环境变量或动物生理学影响的其他替代物将是古气候学领域的巨大财富。本研究的目的是探讨北极星islandica壳的结构特性作为环境代理的潜在用途。通过对11个样品的分析，研究了这种海洋双壳类的微结构组织的变化是否与环境条件有关。为了限制多个参数的干扰，在受控条件下培养样品。这里展示的三个样本在两种不同的水温（10和15 °C）下生长了数周，并且仅暴露于环境食物条件下。另外8个标本饲养在三种不同的饮食制度。用两种技术分析壳材料;（1）共焦拉曼显微镜（CRM）用于量化微观结构单元和颜料分布的取向变化，以及（2）扫描电子显微镜（SEM）用于检测微观结构组织的变化。结果表明，A. islandica微结构对食物来源的变化不敏感，并且壳色素可能不会被饮食改变。然而，海水温度有一个统计上显着的影响，生物矿物的方向。虽然还需要进一步的研究，但本文的结果表明，A. islandica可以作为海水温度的替代和独立的代表。
Abstract. Mollusks record valuable information in their hard parts that reflect ambient environmental conditions. For this reason, shells can serve as excellent archives to reconstruct past climate and environmental variability. However, animal physiology and biomineralization, which are often poorly understood, can make the decoding of environmental signals a challenging task. Many of the routinely used shell-based proxies are sensitive to multiple different environmental and physiological variables. Therefore, the identification and interpretation of individual environmental signals (e.g., water temperature) often is particularly difficult. Additional proxies not influenced by multiple environmental variables or animal physiology would be a great asset in the field of paleoclimatology. The aim of this study is to investigate the potential use of structural properties of Arctica islandica shells as an environmental proxy. A total of 11 specimens were analyzed to study if changes of the microstructural organization of this marine bivalve are related to environmental conditions. In order to limit the interference of multiple parameters, the samples were cultured under controlled conditions. Three specimens presented here were grown at two different water temperatures (10 and 15 °C) for multiple weeks and exposed only to ambient food conditions. An additional eight specimens were reared under three different dietary regimes. Shell material was analyzed with two techniques; (1) confocal Raman microscopy (CRM) was used to quantify changes of the orientation of microstructural units and pigment distribution, and (2) scanning electron microscopy (SEM) was used to detect changes in microstructural organization. Our results indicate that A. islandica microstructure is not sensitive to changes in the food source and, likely, shell pigment are not altered by diet. However, seawater temperature had a statistically significant effect on the orientation of the biomineral. Although additional work is required, the results presented here suggest that the crystallographic orientation of biomineral units of A. islandica may serve as an alternative and independent proxy for seawater temperature.
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影响因子：
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作者：
Merkel C;Griesshaber E;Kelm K;Neuser R.D;Jordan G;Logan A;Mader W;Schmahl W.W.
通讯作者：
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DOI：
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发表时间：
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影响因子：
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影响因子：
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作者：
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通讯作者：
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DOI：
10.1016/j.palaeo.2014.12.016
发表时间：
2015-02-15
影响因子：
3
作者：
Marali, Soraya;Schoene, Bernd R.
通讯作者：
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