Ba/Ca ratios in shells of Arctica islandica—Potential environmental proxy and crossdating tool
Ba/Ca ratios in shells of Arctica islandica—Potential environmental proxy and crossdating tool
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Arctica islandica贝壳中的Ba/Ca比率â潜在的环境代理和交叉约会工具
DOI：
10.1016/j.palaeo.2015.12.018
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Butler PG
中科院分区：
文献类型：
--
作者：
Marali S;Schöne BR;Mertz-Kraus R;Griffin SM;Wanamaker Jr AD;Matras U;Butler PG
Ba/Cashell时间序列的海洋双壳类通常表现出平坦的背景水平，被不稳定的尖峰打断。来自文献的证据表明，背景Ba/Cashell比广泛地反映了盐度条件。然而，Ba/Cashell峰值的原因仍然存在争议和广泛的争论，尽管许多研究人员将这些变化与初级生产力，淡水输入或产卵事件联系起来。最显著的特征是Ba/Cashell峰在来自同一种群的同期标本中高度同步。我们首次研究了Ba/Cashellin成熟和个体发育年龄（长达251岁）的长livedArctica islandica标本。此外，我们还分析了来自地表水和深水的标本。低背景和不稳定的峰值的典型模式持续整个个体发育。然而，由于降低采样分辨率和更大的时间平均在老年人，生长较慢的壳部分，背景Ba/Cashell值似乎逐渐增加与个体发育年龄，而峰值变得衰减和更广泛。尽管如此，Ba/Cashellmaxima仍然是高度同步的同期标本从同一地点和栖息地证实了以前的报告，从短寿命的物种。计算每年的Ba/CashellaBu在很大程度上消除了时间平均和采样分辨率引入的任何偏差。强烈升高的年度Ba/Cashell峰值在标本从表面沃茨（冰岛，法罗群岛，马恩岛）在20世纪80年代似乎符合遥感记录的极端初级生产力脉冲。然而，由于缺乏体内实验，我们不能最终测试之间的因果关系每年Ba/Cashellexcursions和初级生产力。我们建议，Ba/Cashell时间序列，特别是高度同步的Ba/Cashell峰值和年度Ba/Cashell值在同时期的标本从同一地点可以作为一种工具，以验证交叉定年，并促进建设统计上稳健的增长增量宽度主年表。基于双壳类贝壳生长年表的长期环境重建可能会大大受益于这项新技术。
Ba/Cashelltime-series of marine bivalves typically show flat background levels which are interrupted by erratic sharp peaks. Evidence from the literature indicates that background Ba/Cashellratios broadly reflect salinity conditions. However, the causes for the Ba/Cashellpeaks are still controversial and widely debated although many researchers link these changes to primary productivity, freshwater input or spawning events. The most striking feature is that the Ba/Cashellpeaks are highly synchronous in contemporaneous specimens from the same population. For the first time, we studied Ba/Cashellin mature and ontogenetically old (up to 251 year-old) specimens of the long-livedArctica islandica. Also, we analyzed specimens from surface water and deeper water. The typical pattern of low background and erratic peaks persisted throughout ontogeny. However, due to decreasing sampling resolution and greater time-averaging in older, slower growing shell portions, the background Ba/Cashellvalues appeared to gradually increase with ontogenetic age, whereas the peaks became attenuated and broader. Despite that, Ba/Cashellmaxima were still highly synchronous among contemporaneous specimens from the same locality and habitat confirming previous reports from short-lived species. Computing of annual Ba/Cashellaverages largely eliminated any bias introduced by time-averaging and sampling resolution. Strongly elevated annual Ba/Cashellpeaks in specimens from surface waters (Iceland, Faroe Islands, Isle of Man) during the 1980s appear to coincide with an extreme primary productivity pulse recorded by remote sensing. However, due to the lack of in vivo experiments, we cannot ultimately test a causal link between annual Ba/Cashellexcursions and primary productivity. We propose that Ba/Cashelltime-series, specifically the highly synchronous Ba/Cashellpeaks and annual Ba/Cashellvalues in contemporaneous specimens from the same locality can serve as a tool to verify crossdating and facilitate the construction of statistically robust growth increment width master chronologies. Long-term environmental reconstructions based on bivalve shell growth chronologies can likely greatly benefit from this new technique.
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DOI：
10.1191/0959683603hl593rp
发表时间：
2003-01
期刊：
The Holocene
影响因子：
--
作者：
B. Schöne
通讯作者：
B. Schöne
影响因子：
3.3
作者：
H. Tabouret;Sébastien Pomerleau;A. Jolivet;C. Pécheyran;R. Riso;J. Thébault;L. Chauvaud;D. Amouroux
通讯作者：
H. Tabouret;Sébastien Pomerleau;A. Jolivet;C. Pécheyran;R. Riso;J. Thébault;L. Chauvaud;D. Amouroux
影响因子：
5
作者：
H. Stecher;D. Krantz;C. Lord;G. Luther;K. Bock
通讯作者：
H. Stecher;D. Krantz;C. Lord;G. Luther;K. Bock
影响因子：
2.4
作者：
JONES, DS;ARTHUR, MA;ALLARD, DJ
通讯作者：
ALLARD, DJ
影响因子：
3.9
作者：
B. Schöne
通讯作者：
B. Schöne