文章基本信息

标题：Shellfish exploitation during the Oakhurst at Klipdrift Cave, southern Cape, South Africa
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作者：Kokeli P. Ryano ; Karen L. van Niekerk ; Sarah Wurz 等
期刊名称：South African Journal of Science
印刷版ISSN：0038-2353
电子版ISSN：1996-7489
出版年度：2019
卷号：115
期号：9-10
页码：65-73
DOI：10.17159/sajs.2019/5578
语种：English
出版社：The Foundation for Research Development
摘要：Klipdrift Cave in the southern Cape, South Africa, provides new insights into shellfish harvesting during the Later Stone Age (14–9 ka) period associated with the Oakhurst techno-complex. Two shellfish species dominate: Turbo sarmaticus and Dinoplax gigas. An abrupt shift in the relative frequencies of these species occurs in the middle of the sequence with T. sarmaticus almost completely replacing D. gigas. The shift in dominant species is likely due to environmental change caused by fluctuating sea levels rather than change in sea surface temperatures. The shellfish assemblage shows that local coastal habitats at Klipdrift Cave were somewhat different from those of contemporaneous sites in the southern Cape. Although the shellfish specimens are smaller at Klipdrift Cave than those from Middle Stone Age localities such as Blombos Cave, there is no robust indication that larger human populations at Klipdrift Cave during the Oakhurst period might have caused this change in size. Environmental or ecological factors could have restricted shellfish growth rates as some experimental works have suggested, but this possibility also remains to be further explored.Significance:• The dominance of D. gigas and T. sarmaticus at Klipdrift Cave is surprising, as it indicates a local habitat slightly different from other similar sites during the Oakhurst period.• The shift in dominance from D. gigas to T. sarmaticus indicates changing climatic and environmental conditions during the Oakhurst period, 14–7 ka.
关键词：shell-fishing;predation pressure;palaeoclimate;environment;Terminal Pleistocene;coastal subsistence