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Between 5 and 4 thousand years ago, crippling megadroughts led to the disruption of ancient civilizations across parts of Africa and Asia, yet the extent of these climate extremes in mainland Southeast Asia (MSEA) has never been defined. This is despite archeological evidence showing a shift in human settlement patterns across the region during this period. We report evidence from stalagmite climate records indicating a major decrease of monsoon rainfall in MSEA during the mid- to late Holocene, coincident with African monsoon failure during the end of the Green Sahara. Through a set of modeling experiments, we show that reduced vegetation and increased dust loads during the Green Sahara termination shifted the Walker circulation eastward and cooled the Indian Ocean, causing a reduction in monsoon rainfall in MSEA. Our results indicate that vegetation-dust climate feedbacks from Sahara drying may have been the catalyst for societal shifts in MSEA via ocean-atmospheric teleconnections.

Between 5 and 4 thousand years ago, crippling megadroughts led to the disruption of ancient civilizations across parts of Africa and Asia, yet the extent of these climate extremes in mainland Southeast Asia (MSEA) has never been defined. This is despite archeological evidence showing a shift in human settlement patterns across the region during this period. We report evidence from stalagmite climate records indicating a major decrease of monsoon rainfall in MSEA during the mid- to late Holocene, coincident with African monsoon failure during the end of the Green Sahara. Through a set of modeling experiments, we show that reduced vegetation and increased dust loads during the Green Sahara termination shifted the Walker circulation eastward and cooled the Indian Ocean, causing a reduction in monsoon rainfall in MSEA. Our results indicate that vegetation-dust climate feedbacks from Sahara drying may have been the catalyst for societal shifts in MSEA via ocean-atmospheric teleconnections.

In northern Thailand, previous zooarchaeological research suggests that hunter-gatherers consumed a broad diversity of animal resources during the Pleistocene-Holocene transition and afterwards (Gorman 1971a). This is a pattern characteristic of Kent Flannery’s (1969) “broad spectrum revolution” hypothesis. Based primarily on presence and absence evidence, faunal assemblages in northern Thailand typically include species of mammals, reptiles, birds, fish and shellfish, suggesting that prehistoric foragers consumed a wide range of taxa within this mainland Southeast Asian tropical environment. Although zooarchaeological analyses commonly identify this pattern within prehistoric cave and rockshelter sites, past investigations have 1) not attempted to formally test Flannery’s hypothesis, 2) understand the regional specifics of indigenous hunter-gatherer diets during this period, and 3) identify the role that foragers played in the ultimate mid Holocene transition to economies based on domesticated plants and animals. In this research, I examine calibrated radiocarbon age distributions, mammalian stable isotope sequences and zooarchaeological data from four sites in northern Thailand – Spirit Cave (Tham Phii Maen), Steep Cliff Cave (Tham Phaa Can), Banyan Valley Cave (Tham Boong Hoong) and Non Nok Tha (Partridge Mound). I investigate whether a broad spectrum revolution occurred in northern Thailand throughout the late Pleistocene and Holocene, as well as how hunter-gatherer paleodemography, subsistence, and paleoenvironments influenced the mid Holocene transition to economies based on domesticated resources. Results suggest that hunter-gatherer demography generally increases, but fluctuates, throughout the late Pleistocene and Holocene and does not substantially increase during the Pleistocene-Holocene transition. There is no evidence for paleoenvironmental change during the Pleistocene-Holocene transition, and only minor evidence for possible reforestation du

This study reports on an analysis of human adaptations to sea level changes in the tropical monsoonal environment of Peninsula Thailand. We excavated Khao Toh Chong rockshelter in Krabi and recorded archaeological deposits spanning the last 13,000 years. A suite of geoarchaeological methods suggest largely uninterrupted deposition, against a backdrop of geological data that show major changes in sea levels. Although there is a small assemblage of mostly undiagnostic ceramics and stone artefacts, there are some distinct changes in stone artefact technology and ceramic fabric. There is a substantial faunal assemblage, with changes in both the mammalian and shellfish taxa during the Pleistocene-Holocene transition that correlate with local sea level fluctuation. This assemblage provides an opportunity to explore subsistence behaviours leading up to the transition to the Neolithic. We explore the implications for current debates on the prehistoric origins of agricultural subsistence in mainland Southeast Asia. The data highlight the importance of local contingencies in understanding the mechanisms of change from foragers to agriculturalists.

This study reports on an analysis of human adaptations to sea level changes in the tropical monsoonal environment of Peninsula Thailand. We excavated Khao Toh Chong rockshelter in Krabi and recorded archaeological deposits spanning the last 13,000 years. A suite of geoarchaeological methods suggest largely uninterrupted deposition, against a backdrop of geological data that show major changes in sea levels. Although there is a small assemblage of mostly undiagnostic ceramics and stone artefacts, there are some distinct changes in stone artefact technology and ceramic fabric. There is a substantial faunal assemblage, with changes in both the mammalian and shellfish taxa during the Pleistocene-Holocene transition that correlate with local sea level fluctuation. This assemblage provides an opportunity to explore subsistence behaviours leading up to the transition to the Neolithic. We explore the implications for current debates on the prehistoric origins of agricultural subsistence in mainland Southeast Asia. The data highlight the importance of local contingencies in understanding the mechanisms of change from foragers to agriculturalists.

This study reports on an analysis of human adaptations to sea level changes in the tropical monsoonal environment of Peninsula Thailand. We excavated Khao Toh Chong rockshelter in Krabi and recorded archaeological deposits spanning the last 13,000 years. A suite of geoarchaeological methods suggest largely uninterrupted deposition, against a backdrop of geological data that show major changes in sea levels. Although there is a small assemblage of mostly undiagnostic ceramics and stone artefacts, there are some distinct changes in stone artefact technology and ceramic fabric. There is a substantial faunal assemblage, with changes in both the mammalian and shellfish taxa during the Pleistocene-Holocene transition that correlate with local sea level fluctuation. This assemblage provides an opportunity to explore subsistence behaviours leading up to the transition to the Neolithic. We explore the implications for current debates on the prehistoric origins of agricultural subsistence in mainland Southeast Asia. The data highlight the importance of local contingencies in understanding the mechanisms of change from foragers to agriculturalists.

This reanalysis uses the zooarchaeological assemblage recovered from Spirit Cave to understand hunter-gatherer use and occupation at the site during the Pleistocene - Holocene transition. We analyze bone fragmentation, sample size, and relative abundance to establish the preservation and overall composition of the remaining fauna. Identification of several new taxa, including roundleaf bats (Hipposideros larvatus and bicolor), elongated tortoise (Indotestudo elongata), black marsh turtle (Siebenrockiella crassicollis), Burmese hare (Lepus cf. peguensis) and a potential red junglefowl (Phasianidae - ?Gallus gallus) provide insights into hunter-gatherer occupation, palaeoecology, and subsistence strategies between 12,000 and 7000 years b.p. Our results indicate that Spirit Cave was occupied more sporadically than originally suggested; additionally, we identify new evidence for landscape disturbance during the early Holocene. Although this Spirit Cave zooarchaeological assemblage is incomplete, it remains an important component of Southeast Asian prehistory, providing evidence for human adaptations during a period of climatic change and instability. Keywords: Spirit Cave, zooarchaeology, NISP, MNI, Thailand, Pleistocene - Holocene transition, Hipposideros larvatus, Lepus peguensis, Siebenrockiella crassicollis.

This reanalysis uses the zooarchaeological assemblage recovered from Spirit Cave to understand hunter-gatherer use and occupation at the site during the Pleistocene - Holocene transition. We analyze bone fragmentation, sample size, and relative abundance to establish the preservation and overall composition of the remaining fauna. Identification of several new taxa, including roundleaf bats (Hipposideros larvatus and bicolor), elongated tortoise (Indotestudo elongata), black marsh turtle (Siebenrockiella crassicollis), Burmese hare (Lepus cf. peguensis) and a potential red junglefowl (Phasianidae - ?Gallus gallus) provide insights into hunter-gatherer occupation, palaeoecology, and subsistence strategies between 12,000 and 7000 years b.p. Our results indicate that Spirit Cave was occupied more sporadically than originally suggested; additionally, we identify new evidence for landscape disturbance during the early Holocene. Although this Spirit Cave zooarchaeological assemblage is incomplete, it remains an important component of Southeast Asian prehistory, providing evidence for human adaptations during a period of climatic change and instability. Keywords: Spirit Cave, zooarchaeology, NISP, MNI, Thailand, Pleistocene - Holocene transition, Hipposideros larvatus, Lepus peguensis, Siebenrockiella crassicollis.

The Anyathian culture, one of the prominent stone arte-fact traditions in Mainland Southeast Asia spanning the Pleistocene and Holocene, has been frequently described at archaeological sites in the central belt of Myanmar. Human exploitative patterns of plant and animal re-sources relating to the Anyathian are obscure due to the paucity of systematic stratigraphic excavations in Myan-mar. However, recent research in the States of Shan and Kayin has shown that Myanmar has the potential to contribute to a better understanding of human subsistence economies at hunter-gatherer sites throughout the Pleistocene and Holocene. This study reviews faunal evidence recovered in association with stone artefacts at hunter-gatherer sites throughout Myanmar and illustrates the significance that further, more intensive research and better chronometric dating has for developing our understanding of foraging strategies in the Late Pleistocene and Holocene in Myanmar.

The Anyathian culture, one of the prominent stone arte-fact traditions in Mainland Southeast Asia spanning the Pleistocene and Holocene, has been frequently described at archaeological sites in the central belt of Myanmar. Human exploitative patterns of plant and animal re-sources relating to the Anyathian are obscure due to the paucity of systematic stratigraphic excavations in Myan-mar. However, recent research in the States of Shan and Kayin has shown that Myanmar has the potential to contribute to a better understanding of human subsistence economies at hunter-gatherer sites throughout the Pleistocene and Holocene. This study reviews faunal evidence recovered in association with stone artefacts at hunter-gatherer sites throughout Myanmar and illustrates the significance that further, more intensive research and better chronometric dating has for developing our understanding of foraging strategies in the Late Pleistocene and Holocene in Myanmar.

The zooarchaeological record of a recently excavated rockshelter site in peninsular Thailand is summarized. Detailed identification of mammalian, reptilian, piscean and molluscan taxa indicate a unique foraging pattern of prehistoric humans throughout the late-Pleistocene to Holocene.

The zooarchaeological record of a recently excavated rockshelter site in peninsular Thailand is summarized. Detailed identification of mammalian, reptilian, piscean and molluscan taxa indicate a unique foraging pattern of prehistoric humans throughout the late-Pleistocene to Holocene.