Seasonality of Late Prehistoric Clamming on San Francisco Bay: Oxygen Isotope Analyses of Macoma nasuta Shells from a Stege Mound, CA-CCO-297
Seasonality of Late Prehistoric Clamming on San Francisco Bay: Oxygen Isotope Analyses of Macoma nasuta Shells from a Stege Mound, CA-CCO-297
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旧金山湾史前晚期蛤的季节性：来自 Stege 土丘的 Macoma nasuta 贝壳的氧同位素分析，CA-CCO-297
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
C. Descantes
中科院分区：
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作者：
J. Eerkens;Alex DeGeorgey;H. Spero;C. Descantes
摘要利用末端生长环的氧同位素比值，对CA-CCO-297单组分晚II期（450-200 cal BP）组合中32个Macoma nasuta壳的收获月份进行了估算。结果表明，采蛤活动全年均有发生，但在初夏和初冬两个季节最为明显。我们将前者与初夏较长的日光联系起来，这有利于进入潮滩和捕蛤，而后者可能更多地与缺乏其他觅食机会有关。我们将结果与Macoma在旧金山湾的另外两个后期站点（ca - sr -171和CA-SMA-6）和一个中期站点（CA-ALA-17）的季节性研究进行了比较。这四个地点的模式在许多方面都很相似，但在细节上有所不同，并突出了该地区古代定居模式的新信息。
Abstract Using oxygen isotope ratios in terminal growth rings, we estimate the month of harvest of 32 Macoma nasuta shells from a single component Late Phase II (450–200 cal BP) assemblage from CA-CCO-297. Results suggest that clamming occurred throughout the year, but was most pronounced during two pulses in early summer and early winter. We relate the former to longer daylight in early summer that facilitated access to tidal flats and clamming, while the latter may relate more to a lack of other foraging opportunities. We compare the results to Macoma seasonality studies at two other Late Period sites (CA-SFR-171 and CA-SMA-6) and one Middle Period site (CA-ALA-17) on San Francisco Bay. The patterns at all four sites are similar in many regards, but differ in the details and highlight new information on ancient settlement patterns in the region.