Archaeology and ecology of acavus snails in Sri Lanka’s semi-arid to intermediate zones: uncovering holocene microclimatic changes

Thilanka M. Siriwardana, Pramuditha P. Manusinghe
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Abstract

This study presents a discovery of Acavus haemastoma, wet-humid favouring arboreal land snails from Semi-Arid coastal lagoon habitat during the late Holocene period in Southern Sri Lanka, occurring around the mid-4th millennium BP. These findings challenge established notions regarding palaeoecological conditions within the Semi-Arid and Transitional Zones (SATZ), prompting a re-evaluation of prevailing archaeological assumptions. We propose that the presence of Acavus sp. in the SATZ is primarily attributed to their natural behaviours rather than anthropogenic influences. In conjunction with an examination of early archaeological literature, we explore the implications of humid phases within the SATZ, aligning these phases with Acavus snails’ distribution patterns and climatic fluctuations and proposing the value of land snails in Sri Lanka as a potential proxy for small scale micro-climatic conditions.

斯里兰卡半干旱和中间地带的尖吻蜗牛考古学和生态学:揭示全新世的小气候变化
本研究介绍了在斯里兰卡南部全新世晚期的半干旱沿海泻湖栖息地发现的喜欢湿润气候的树栖陆蜗牛(Acavus haemastoma),时间大约在公元前四千年中期。这些发现挑战了有关半干旱和过渡带(SATZ)古生态条件的既定观念,促使人们重新评估当时的考古假设。我们提出,半干旱和过渡带出现金合欢属动物主要是由于它们的自然行为,而非人为影响。结合对早期考古文献的研究,我们探讨了 SATZ 内潮湿阶段的含义,将这些阶段与 Acavus 蜗牛的分布模式和气候波动相联系,并提出了斯里兰卡陆地蜗牛作为小规模微气候条件潜在替代物的价值。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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