The long living Glycymeris pilosa bivalve is an interesting target species for the sclerochronological research in the Mediterranean Sea. In this study, Ba/Ca_shell and Mg/Ca_shell variations were studied along the coast of the eastern Adriatic Sea. Specimens were collected alive by SCUBA and skin diving during several occasions in 2014, 2015 and 2016 from five sites including Pag, Pašman Channel, Cetina, Živogošće and Drače. Element-to-Ca_shell ratios were measured by LA-ICP-MS in line scan mode in three specimens of each site, ranging in age from 7 to 21. In addition, chemical analysis was conducted on three ontogenetically older specimens (68-97 years-old) from Drače. Mg/Ca_shell and annual growth lines were used to place the Ba/Ca_shell data in temporal context. Published monthly G. pilosa shell growth data were used for transferring elemental data from distance to time scale. To enable a direct comparison of Ba/Ca_shell data between specimens and sites (different time-averaging), as well as a comparison with environmental data, monthly mean values were calculated (re-sampling). Results of this study show that Mg/Ca_shell values in G. pilosa increase through lifetime and variations occur with respect to amplitude and seasonal patterns. Detailed comparison of Mg/Ca_shell data between sites was not possible because specimens varied in ontogenetic age. Ba/Ca_shell values ranged between 0.03 μmol/mol and 14.18 μmol/mol, and time-series showed noncyclic sharp peaks, which differed between years. Values were rather synchronous among specimens from the same site. Specimens from Pašman, Živogošće and Drače contain more peaks than specimens from Pag and Cetina, and these peaks are less synchronous among the time-series. Three northern sites were characterised by lower Ba/Ca_shell values than the two southern sites. Comparison of monthly Ba/Ca_shell times-series with available environmental data revealed variability of environmental conditions. Long-term Ba/Ca_shell data of G. pilosa from Drače showed a lower baseline and amplitude during the 1950s and 1960s than from the mid-1970s onward. It is possible that these long-term changes are at least partially caused by anthropogenic factors, including changes of the river Neretva management and development of agriculture in its delta.

长寿的Glycymeris pilosa bivalve是地中海沿岸年代学研究的一个有趣目标物种。在这项研究中，研究了东亚得里亚海沿岸的Ba / Ca_壳和Mg / Ca_壳的变化。2014年，2015年和2016年，SCUBA和皮肤潜水分别从Pag，PašmanChannel，Cetina，Živogošće和Drače等5个地点采集了活体标本。通过LA-ICP-MS以线扫描模式在每个部位的三个样本中测量元素与Ca的_壳比，年龄从7岁到21岁。此外，还对三个个体发育较早的样本进行了化学分析（68-97岁）来自Drače。镁/钙_壳和年增长线用于将Ba / Ca_壳数据放置在时间上下文中。每月发布的毛绒球菌壳生长数据用于将元素数据从距离传递到时间尺度。为了能够直接比较样品和部位之间的Ba / Ca_壳层数据（不同的时间平均）以及与环境数据的比较，计算了每月平均值（重新采样）。本研究的结果显示，镁/钙_壳中值G.草通过寿命增加和变化相对于振幅和季节模式发生。由于标本的成因年龄不同，因此无法对各站点之间的Mg / Ca_壳数据进行详细比较。钡/钙_壳值介于0.03μmol/ mol和14.18μmol/ mol之间，并且时间序列显示出非周期性的尖峰，并且每年之间存在差异。来自同一站点的样本之间的值相当同步。来自Pašman，Živogošće和Drače的标本比来自Pag和Cetina的标本包含更多的峰，并且这些峰在时间序列之间不那么同步。三个北部站点的特征是Ba / Ca_壳值低于两个南部站点。每月Ba / Ca_壳时间序列与可用环境数据的比较显示了环境条件的可变性。G. pilosa的长期Ba / Ca_壳数据与1970年代中期以后相比，Drače的基线在1950年代和1960年代的基线和振幅较低。这些长期变化可能至少部分是由人为因素引起的，包括内雷特瓦河的管理变化和三角洲的农业发展。