Response of daily and annual shell growth patterns of the intertidal bivalve Phacosoma japonicum to Holocene coastal climate change in Japan
Response of daily and annual shell growth patterns of the intertidal bivalve Phacosoma japonicum to Holocene coastal climate change in Japan
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DOI：
10.1016/j.palaeo.2009.11.032
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发表时间：
2010-02
期刊：
影响因子：
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通讯作者：
Tsuzumi Miyaji;K. Tanabe;Y. Matsushima;Shin'ichi Sato;Y. Yokoyama;H. Matsuzaki
中科院分区：
文献类型：
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作者：
Tsuzumi Miyaji;K. Tanabe;Y. Matsushima;Shin'ichi Sato;Y. Yokoyama;H. Matsuzaki
众所周知，日本列岛周围浅海软体动物的纬度分布在全新世期间因气候变化而发生了间歇性变化；然而，很少有研究在每日到每年的时间分辨率范围内调查单个物种对全新世气候变化的生物反应。从日本不同地点发现的全新世金龟子壳（Phacosoma japonicum）的外壳层和铰链板保留了月球每日和每年的生长增量，这在现代贝壳中也观察到。对29个已知14C年龄的贝壳进行的硬化年代学分析表明，生活史特征（例如，生长期的长度和给定年龄的平均月球日增长率）在过去8000年中发生了显着变化。化石贝壳的月球日增量和贝壳氧同位素记录的年内模式可以与来自不同地点的现代标本进行比较，这些模式受到海水温度和夏秋季降水率的年度模式的限制。此外，化石贝壳中记录的时间趋势显示出过去8000年来东亚中纬度地区气候变化的强烈相关性，表明日本对虾为了应对全新世陆地和沿海气候变化而改变了其生活史特征。
It is well known that the latitudinal distribution of shallow-marine mollusks around the Japanese Islands has changed episodically during the Holocene in response to climate change; however, few studies have investigated the biotic response of individual species to Holocene climate change at daily to annual scales of temporal resolution. Holocene shells of the venerid Phacosoma japonicum recovered from various sites in Japan preserve lunar daily and annual growth increments in the outer shell layer and hinge plate, as also observed in modern shells. Sclerochronological analysis of 29 shells with known14C ages revealed that the life history traits (e.g., length of the growth period and the mean lunar daily growth rate at a given age) have changed markedly over the past 8000years. The intra-annual patterns of lunar daily increments and shell oxygen isotope records of the fossil shells can be compared with those of modern specimens from various locations, which are constrained by annual patterns of seawater temperature and summer–autumn precipitation rates. Furthermore, the temporal trends recorded in the fossil shells show a strong correlation with climate change in mid-latitude parts of East Asia over the past 8000years, indicating that P. japonicum has changed its life history traits in response to Holocene terrestrial and coastal climate change.