Biometric, microstructural, and high-resolution trace element studies in Crassostrea gigas of Cantabria (Bay of Biscay, Spain): Anthropogenic and seasonal influences
Biometric, microstructural, and high-resolution trace element studies in Crassostrea gigas of Cantabria (Bay of Biscay, Spain): Anthropogenic and seasonal influences
复制标题
DOI：
10.1016/j.ecss.2009.01.001
复制
发表时间：
2009-04-10
影响因子：
2.8
通讯作者：
Elorza, J.
中科院分区：
文献类型：
--
作者：
Higuera-Ruiz, R.;Elorza, J.
在坎塔布里亚（西班牙比斯开湾）的三个河口：圣维森特德拉巴尔克拉河口，桑坦德湾，和Marismas de Santona河口收集不同年龄和大小的牡蛎。主要目的是确定不同的外壳对可变环境参数的反应。壳形态学研究，基于三个生物特征指数，表明桑坦德湾的牡蛎有两个显着的壳异常：异常增厚的右阀和重要腔体积的损失。这些贝壳异常现象与这些沃茨中存在的化学品三丁基锡有关。在另外两个河口，牡蛎没有显示出可检测到的异常。四种壳微结构已被区分：规则简单棱柱，规则叶状，锥复合交叉叶状和白垩。在桑坦德湾牡蛎，白垩形成了一个“根型”的框架，而在其他两个河口，它形成了一个更紧凑的微观结构。有人提出，接触三丁基锡产生了这种变化。高空间分辨率的地球化学断面已进行的规则叶状微结构的umbo区域，以评估的分布Mg，Sr和Na。分析的元素表现出明确的周期性变化，在圣维森特德拉巴尔克拉河口和Marismas de Santona河口牡蛎，与季节性周期，并具有广泛的最大值在几个月期间，其中沃茨是温暖的，具有较高的盐度。这些模式在桑坦德湾牡蛎中得到了缓冲。我们的研究结果表明，牡蛎壳的生物特征，微观结构和高分辨率的微量元素研究可以提供有关污染物和河口环境的季节变化的信息。(C)2009爱思唯尔有限公司保留所有权利。
Living Crassostrea gigas oysters of different ages and sizes were collected in three estuaries of Cantabria (Bay of Biscay, Spain): San Vicente de la Barquera Estuary, Santander Bay, and Marismas de Santona Estuary. The main objective was to determine different shell responses to variable environmental parameters. A shell morphological study, based on three biometric indices, indicates that oysters of Santander Bay have two significant shell anomalies: abnormal thickening of the right valve and loss of vital cavity volume. These shell abnormalities are related with the presence in these waters of the chemical tributyltin. In the other two estuaries, the oysters show no detectable anomalies. Four shell microstructures have been distinguished: Regular Simple Prismatic, Regular Foliated, cone-Complex Cross Foliated, and Chalk. In Santander Bay oysters, the Chalk forms a "root-type" framework, whereas in the other two estuaries it forms a more compact microstructure. it is proposed that exposure to tributyltin has produced this modification. High-spatial-resolution geochemical transects have been carried out on the Regular Foliated microstructure in the umbo region in order to evaluate the distribution of Mg, Sr, and Na. The elements analysed exhibit clear cyclic variations in San Vicente de la Barquera Estuary and Marismas de Santona Estuary oysters, related with seasonal periods, and characterised by broad maxima during months in which the waters are warmer and have higher salinity. These patterns are buffered in Santander Bay oysters. Our results demonstrate that biometric, microstructural, and high-resolution trace element studies in oyster shells can provide information about contaminants and seasonal variations in the estuarine environment. (C) 2009 Elsevier Ltd. All rights reserved.