Declines in Mammalian Foraging Efficiency during the Late Holocene, San Francisco Bay, California

Resource intensification models that have been posited for prehistoric California predict decreases in foraging efficiency during the late Holocene, Using implications of the fine-grained prey model of optimal foraging theory, I derive an index of the efficiency of vertebrate prey choice from the relative abundances of large- and small-sized prey items. I then test the intensification models with late Holocene mammalian faunas from San Francisco Bay shellmounds. Dramatic linear decreases in the relalive frequency of artiodactyls compared to the smaller sea otters (Enhydra lutris) throughout the occupational histories of particular localities strongly support the resource intensification models. The declines in artiodactyl abundances are not correlated with late Holocene climatic indices developed for this region, with changes in the seasonal use of shellmounds, or with technological innovations. An intra- and interregionally consistent pattern in declining abundances of large mammals in environmentally distinct regions throughout California suggests that resource depression driven by human predators may be the single most important cause of the declines. These patterns have far-reaching implications concerning the long-term human role in structuring prehistoric ecosystems.     

Persistent land use patterns and the mid-Holocene housepits of Wyoming

Abstract

The cyclical use of sites and locales over decades, centuries, and even millennia is an important aspect of hunter-gatherer land use that is rarely considered in studies that focus on a single annual cycle. The long-term perspective provided by archaeological data can be used to delineate persistent land use patterns and contribute to an understanding of the complexity of hunter-gatherer behavior. Mid-Holocene Wyoming housepit data document persistent land use over at least a 2000-year period at three spatial scales—the reuse of housepits, reuse of sites containing housepits, and use of different sites within the larger region. Slab-lined cylindrical basins at many sites in southwest Wyoming provide evidence for stable long-term land use during the middle Holocene. The focal point of this pattern was probably a predictable resource, possibly some type of root plant that would have been available during the dry middle Holocene.     

Hunter-Gatherer Mobility Strategies in the High Andes of Northern Chile during the Late Pleistocene-Early Holocene Transition (ca. 11,500–9500 CAL B.P.)

The high Andes of western South America feature extreme ecological conditions that impose important physiological constraints on humans including high-elevation hypoxia and cold stress. This leads to questions regarding how these environments were colonized by the first waves of humans that reached them during the late Pleistocene. Based on previous research, and aided by human behavioral ecology principles, we assess hunter-gatherer behavioral strategies in the Andean highlands during the late Pleistocene and early Holocene. Specifically, we formulate three mobility strategies and their archaeological expectations and test these using technological and subsistence evidence from the six earliest well-dated highland sites in northern Chile. Our results suggest that all of the studied sites were temporarily occupied for hunting, processing animals, and toolkit maintenance. The sites also exhibit shared technological features within a curatorial strategy albeit with different occupation intensities. From this evidence, we infer that the initial occupations of the highlands were logistical and probably facilitated by increased local resource availability during a period of environmental amelioration.     

Historical ecology of late Holocene sea otters (Enhydra lutris) from northern British Columbia: isotopic and zooarchaeological perspectives

We examined the isotopic composition (δ¹³C and δ¹⁵N) of sea otter (Enhydra lutris) bone collagen from ten late Holocene (ca. 5200 years BP–AD 1900) archaeological sites in northern British Columbia (BC), Canada. Because sea otters are now extinct from much of this region and have not fully recolonized their former range (e.g. Haida Gwaii and most of northern BC) these data represent an important first step towards better understanding sea otter foraging ecology in BC. The isotopic data suggest a diet composed primarily of benthic invertebrates, with a very low reliance on epibenthic fish. There is very low isotopic and thus inter-individual dietary variability in Holocene BC sea otters during the late Holocene. Furthermore, zooarchaeological abundance data suggest that otters represented a widespread and significant focus of aboriginal hunting practices on the northern BC coast during the mid- to late-Holocene. The consistent reliance on a small number of low-trophic level prey and limited dietary variability in Holocene BC sea otters may reflect top-down impacts on otter populations by aboriginal peoples. As part of our assessment of sea otter diet, we review trophic discrimination factors (Δ¹³C and Δ¹⁵N) for bone collagen from published literature and find marked variability, with mean values of +3.7 ± 1.6 for Δ¹³C (n = 21) and +3.6 ± 1.3 for Δ¹⁵N (n = 15).     

Human Palaeoecological Interactions and Owl Roosting at Tron Bon Lei,Alor Island,Eastern Indonesia

We report on tetrapod (Reptilia, Amphibia, Mammalia, Aves) vertebrates recovered during excavations at Tron Bon Lei rockshelter on the south coast of Alor Island, eastern Indonesia. These include both archaeological specimens recovered from a 1 m² test pit dating from ～21 kya cal BP to the late Holocene, and a modern eastern barn owl deposit recovered nearby. To discern between the depositional processes that accumulated the small numbers of micro- and macrovertebrate remains from the archaeological deposits, the taphonomic signature of the natural assemblage was quantified and compared to the archaeological record. The taphonomic data indicates that the tetrapod archaeofaunal remains are a combination of barn owl predation of microfauna and human predation of larger fauna. This approach provides new information on human-tetrapod interactions on Alor in Wallacea during the late Quaternary, including an apparent increase in cave site use and hunting intensity during the Pleistocene-Holocene transition, sea turtle butchery and probable transport, and extinctions of previously unknown giant to large rat species.     

Identifying palaeo-environments and changes in Aboriginal subsistence from dual-patterned faunal assemblages,south-western Australia

Palaeo-environments and past human subsistence patterns are difficult to determine from dual-patterned faunal assemblages where human and non-human predators have accumulated and intensively modified animal bones. This paper examines such records in the Leeuwin–Naturaliste Region of south-western Australia, where a thin belt of coastal limestone contains caves and rock shelters with rich faunal deposits. The Late Pleistocene and Holocene part of this record derives from four archaeological sites: Devil's Lair, Tunnel Cave, Witchcliffe Rock Shelter and Rainbow Cave. Correspondence analysis combined with cluster analysis enables a preliminary assessment of habitat changes using simple species abundances in the faunal assemblages and comparison with indices of past human activity in the sites and the species’ present habitat preferences. These inferred changes, consistent with previous analyses of faunal remains and tree charcoal, suggest that late Holocene sites document Aboriginal occupation in coastal heath, scrub and woodland. Late Pleistocene deposits record hinterland occupation at times of low sea-level when the coast was up to 30 km seawards of its present position and the surrounding vegetation was open-forest or woodland. As rainfall increased and vegetation changed in the Holocene, species foraging in open-woodland declined or became locally extinct, while species requiring closed canopy habitats increased. Rank-order correlations of taxa and archaeological remains from depositional sequences before and after the environmental change indicate that the occupiers of late Holocene sites favoured the same generalist species that occupiers of Late Pleistocene sites had favoured, which were available at all times. Prey habitats, foraging behaviours and historic records of ethnographic hunting and settlement pattern suggest that this local continuity is consistent with maintenance of a “dispersive mode” subsistence pattern in the region.     

Palaeodiet of Mesolithic and Neolithic populations of Meuse Basin (Belgium): evidence from stable isotopes

The human diet was investigated using the carbon and nitrogen isotopic signatures of 93 Mesolithic and Neolithic specimens (∼10,000–2000 BC) from the Meuse Basin (Belgium). During the Ancient Mesolithic period (∼9300–8000 BC), the environment was generally open and the main dietary protein was provided by hunted terrestrial mammals, with the possible addition of freshwater resources. Human remains are not available in the Meuse Basin from around 8000 BC to 4300 BC, thus preventing the study of the Mesolithic-Neolithic dietary transition in this region. Throughout the Middle Neolithic (∼4300–3000 BC), hunting was more difficult and less productive due to a densely forested environment. The contribution of freshwater resources to the diet increased, with the remaining proteins provided by terrestrial wild and/or domestic mammals, indicating that non-agricultural resources were not eliminated in this region during the Middle Neolithic period. The contribution of freshwater resources seems negligible in the Middle/Late and Late Neolithic periods (∼3300–1700 BC), with isotopic results revealing a diet composed of agricultural products. The δ¹⁵N values of infants are compatible with a weaning age at around 2 years. This study documents the dietary changes that occurred in Belgium during the first part of the Holocene, and reveals the subtle dietary distinction between wild and domestic terrestrial resources and freshwater resources.     

A Late Holocene Population Bottleneck in California Tule Elk (Cervus elaphus nannodes): Provisional Support from Ancient DNA

Zooarchaeological analyses have suggested a possible case of late Holocene resource depression in California tule elk (Cervus elaphus nannodes). We develop and conduct a preliminary independent test of this here based on trends in genetic diversity derived from ancient DNA extracted from archaeological elk bone. Mitochondrial DNA sequence data from 24 tule elk temporally dispersed across the late Holocene deposits of the Emeryville Shellmound, California, provide provisional support for a decline in genetic diversity and a population bottleneck beginning about 1600 B.P. Final confirmation of this pattern must await complete replication of the sequences. Stable isotope analyses of the elk bone provide a record of change in the terrestrial environment across the period of deposition and no suggestion that climate change may have played a role in an elk population decline. The analysis has implications for our understanding of change in human behavior and biology during late Holocene of central California, the methodology of resource depression analyses, and the conservation biology of tule elk.     

Obsidian use at the Ushki Lake complex,Kamchatka Peninsula (Northeastern Siberia): implications for terminal Pleistocene and early Holocene human migrations in Beringia

A study of the movement of people within Northeast Asia at the end of the Pleistocene is critical for understanding how and when some of the first human populations entered North America. Chemical source studies of obsidian may provide the evidence necessary to document people's migrations between these regions. Sixty two obsidian artifacts from the late Pleistocene and Holocene Ushki Lake sites in Kamchatka Peninsula were analyzed by instrumental neutron activation analysis (INAA). Data generated demonstrate that multiple obsidian sources throughout Kamchatka were exploited by the inhabitants of Ushki Lake, and allow us to document long-distance population movements during the late Pleistocene and Holocene. It is reasonable to expect that obsidian from Kamchatka might have been transported to Alaska. This is true for the Chukotka region of Northeastern Siberia; obsidian from Chukotka has been found in late Holocene archaeological sites in Alaska. Ultimately, an expanded study that includes all areas of Northeast Asia and Alaska may provide the data necessary to document the earliest movements of people in these regions.     

Use of ulan-khada bay at lake baikal in the holocene (based on fauna remains)

The article presents the results of studies of faunal remains from the Ulan-Khada multilayered settlement – one of key habitation sites in the Cis-Baikal region providing information for reconstructing environmental and cultural changes during the Holocene. A complete analysis of the fauna assemblage obtained over the course of long-term excavations is given. For the fi rst time, the site's ichthyofauna is described. The mammalian species composition is revised. Species diversity is evaluated across the time span from the Final Mesolithic to the Late Iron Age. These studies have demonstrated that the main activities at the site during the Neolithic and Bronze Age included seal and ungulate (roe and red deer) hunting. Fishing was also important, especially 4.2–3.8 thousand years ago (Bronze Age).     

The expansion of Araucaria forest in the southern Brazilian highlands during the last 4000 years and its implications for the development of the Taquara/Itararé Tradition

Abstract

An examination of the late Holocene environmental and cultural sequences of the southern Brazilian highlands indicates that the colonisation of this region by the Taquara/Itararé people is associated with the expansion of Araucaria forest resulting from the onset of wetter climatic conditions in the region, which started between around 1410 and 900 cal. yr BP. The more intense and permanent human occupation of this region is associated with the advance of Araucaria forest, which provided Taquara/Itararé groups with a newly abundant and reliable resource: Araucaria seeds. In addition, we review the evidence for landscape transformation associated with the beginning of food-production in the region. Charcoal records show that local populations may have practiced slash-and-burn agriculture at lower elevations since the beginning of the late Holocene around 4320 cal. yr BP, and continued this practice during the second part of the late Holocene.     

Upper Paleolithic Net-Hunting, Small Prey Exploitation, and Women's Work Effort: A View from the Ethnographic and Ethnoarchaeological Record of the Congo Basin

Recent interest in Upper Paleolithic small prey acquisition focuses on the significance of fiber-based hunting technologies. Some researchers believe the advent of these technologies and presence of small faunas reflect efficient communal net-hunts driven by women's labor. We evaluate different small prey hunting techniques, using ethnographic data from foragers in the Congo Basin. These and other ethnographic data suggest that net-hunting is a high risk endeavor that often has high opportunity costs. We argue that the high costs associated with net-hunting have profound implications for human technological choice, and we evaluate the circumstances that would favor the use of different small prey hunting technologies in the Upper Paleolithic.     

Waterfowl and Lunate Crescents in Western North America: The Archaeology of the Pacific Flyway

California and Great Basin archaeologists have long discussed and debated the function of chipped stone crescents found in Terminal Pleistocene and Early Holocene sites in the Far West of North America. Because they are found over a vast area, in sites occupied over a period spanning at least 4,000 years (~12,000–8,000 cal BP), it may be that crescents were used for a variety of purposes. Here we focus on lunate crescents and their strong association with wetland localities (lakes, marshes, estuaries, and islands). We reconsider whether crescents could have been used as transverse projectile points to hunt waterfowl. We also assess the biogeographical legacies of migrating birds to propose that as many as four species of large anatids (tundra swan, greater white-fronted goose, snow goose, Ross’s goose) that now breed in the Canadian High Arctic once bred in the Great Basin and adjacent regions during the Late Pleistocene and Early Holocene. We propose that crescents were used primarily in the taking or processing of geese and swans, some of which may have bred and molted in what are now temperate latitudes. After the Laurentide ice sheet retreated, these four species established High Arctic breeding grounds and no longer bred in the Great Basin. In this scenario, the absence of some populations of molting geese and swans helps explain why crescents fell out of the archaeological record after ~8,000 cal. BP. When crescents were used, Native Americans in the Far West may have had access to millions of large waterfowl.     

Economic and environmental changes during the 4th and 3rd millennia BC: the 25th Jubilee Symposium of the AEA in Bad Buchau,southern Germany

Abstract

This study represents the first detailed published analysis of a relatively large archaeologically derived faunal assemblage in eastern Beringia for the Late Pleistocene/Early Holocene. The faunal remains, dated to 10,100 cal. BP, are well preserved and have highly resolved spatial association with lithics and hearth features. Factors in the formation of the assemblage are assessed through analyses of weathering, presence/absence of carnivore damage, fragmentation patterns, bone density, and economic utility. Taphonomic analyses indicate that human transport and processing decisions were the major agents responsible for assemblage formation. A spatial model of wapiti and bison carcass processing at this site is proposed detailing faunal trajectories from the kill sites, introduction on site in a central staging area to peripheral marrow extraction areas associated with hearths and lithic items. Data from mortality profiles, spatial analysis, and economic analysis are used to interpret general economy and site function within this period in Interior Alaska. These data and intersite comparisons demonstrate that considerable economic variability existed during the Early Holocene, from broad spectrum foraging to efficient, specialized terrestrial large mammal hunting.     

Plant exploitation of the last foragers at Shizitan in the Middle Yellow River Valley China: evidence from grinding stones

China is one of the few centers in the world where plant domestication evolved independently, but its developmental trajectory is poorly understood. This is because there is considerably less data from the terminal Pleistocene and early Holocene documented in China than in other regions, such as the Near East and Mesoamerica, and previous studies on Paleolithic subsistence in China have largely focused on animal hunting rather than plant gathering. To resolve these problems the current research investigated the range of plants used by late Paleolithic hunter–gatherers in the middle Yellow River region where some of the earliest farmers emerged. We employed usewear and starch analyses on grinding stones to recover evidence for plant use in a hunting–gathering population at a late Paleolithic site, Shizitan Locality 9 in Jixian, Shanxi (ca. 13,800–8500 cal. BP). The usewear analysis shows that all artifacts preserved a range of usewear patterns best matching multiple tasks and indicating multi-functional use. Starch remains recovered from these tools indicate that the Shizitan people collected and processed many types of grass seeds (Panicoideae and Pooideae subfamilies), acorns (Quercus sp.), beans (Phaseoleae tribe) and yams (Dioscorea sp.). The Shizitan people represented some of the last hunter–gatherers in the middle Yellow River region. Their broad spectrum subsistence strategy was apparently carried on by the first Neolithic farmers in the same region, who collected similar wild plants and eventually domesticated millets. The trajectory from intensified collection of a wide range of wild plants to domestication of a small number of species was a very long process in north China. This parallels the transition from the “broad spectrum revolution” to agriculture in the Near East.     

Explaining prehistoric variation in the abundance of large prey: A zooarchaeological analysis of deer and rabbit hunting along the Pecho Coast of Central California

Three main hypotheses are commonly employed to explain diachronic variation in the relative abundance of remains of large terrestrial herbivores: (1) large prey populations decline as a function of anthropogenic overexploitation; (2) large prey tends to increase as a result of increasing social payoffs; and (3) proportions of large terrestrial prey are dependent on stochastic fluctuations in climate. This paper tests predictions derived from these three hypotheses through a zooarchaeological analysis of eleven temporal components from three sites on central California’s Pecho Coast. Specifically, we examine the trade-offs between hunting rabbits (Sylvilagus spp.) and deer (Odocoileus hemionus) using models derived from human behavioral ecology. The results show that foragers exploited a robust population of deer throughout most of the Holocene, only doing otherwise during periods associated with climatic trends unfavorable to larger herbivores. The most recent component (Late Prehistoric/Contact era) shows modest evidence of localized resource depression and perhaps greater social benefits from hunting larger prey; we suggest that these final changes resulted from the introduction of bow and arrow technology. Overall, results suggest that along central California’s Pecho Coast, density independent factors described as climatically-mediated prey choice best predict changes in the relative abundance of large terrestrial herbivores through the Holocene.     

Evaluating Natural Site Formation Processes in Eolian Dune Sands: A Case Study from the Krmpotich Folsom Site,Killpecker Dunes,Wyoming

Eolian dune sands commonly contain archaeological material in both surface and buried contexts. However, because of the dynamic nature of dunes, the original context of an archaeological site can be severely modified or destroyed as a result of post-occupational geomorphic processes. This paper examines a Folsom occupation associated with a buried soil in the Killpecker Dunes in southwestern Wyoming. Field and labortory data are compared to determine the likely scenario of natural site formation processes responsible for the current context of the archaeological assemblage. Two primary eolian stratigraphic units are present at the site, and are separated by the buried artefact-bearing soil. Radiocarbon and optical luminescence ages indicate that the Folsom artefacts occur across a temporal hiatus, and that the buried soil is late Holocene in age. Sedimentological data indicate that the highest frequencies of artefacts by depth are associated with an erosional contact characterized by a concentration of coarse-grained material. Thus, the Folsom assemblage appears to have been vertically displaced as a result of post-occupational erosion and deflation. This case study indicates that evaluating the context of an archaeological occupation in a dune setting is best carried out utilizing multiple lines of evidence derived from both field and laboratory work.     

Holocene lakes and prehistoric settlements of the Western Faiyum,Egypt

Holocene lake stages in the Faiyum depression commenced with a high lake stand during the 10th millennium bp, followed by an early Holocene lake from 8500 to 7000 bp. A pronounced recession and the development of a palaeosol preceded another rise to a mid-Holocene, high lake level from 6500 to 5100 bp. A major drop in level coincided with the late Neolithic and Early Dynastic. The Moeris lake witnessed by Herodotus is also documented. The drop in lake level during early Ptolemaic times marked the end of the freshwater lake and was apparently, in part, a result of declining Nile floods. Terminal Palaeolithic sites are associated with the early Holocene lake and Neolithic sites with the mid-Holocene phase. Prehistoric settlements were placed near lake-margin marshes and ponds. The richness of the lake margin in aquatic resources and its susceptibility to short- and long-term fluctuations influenced both subsistence and settlements, and is believed to have encouraged a para-agricultural economy.     

Evaluating Intensity in the Processing of Guanaco (Lama Guanicoe) at the Lower Basin of the Colorado River (Argentina): Fragmentation Levels and Fracture Patterns Analysis

This article explores the levels of fragmentation and fracture patterns in archaeofaunal assemblages from the lower basin of the Colorado River (Argentina) following Outram's methodology. Remains of ungulates (guanaco) have suffered, in these assemblages, a high degree of fragmentation probably caused during the processing of the carcasses. The presence of helical debris and shaft fragments indicates that fragmentation would respond to processing tasks for the consumption of marrow and possibly bone grease. The results of the application of this methodology that were obtained from the analysis of three late Holocene sites (La Primavera, Loma Ruiz 1 and El Tigre) are presented. These results provide new evidence not only for patterns of marrow and bone grease consumption but also for dealing with the subsistence model proposed for the study area. In this sense, the intensification processes already proposed during the final late Holocene (1000–250 bp ) are discussed. Copyright © 2012 John Wiley & Sons, Ltd.     

Prehistoric hand stencils at Fern Cave, North Queensland (Australia): environmental and chronological implications of Raman spectroscopy and FT-IR imaging results

Raman spectroscopy and FT-IR imaging analyses of cave wall pigment samples from north Queensland (Australia) indicate that some hand stencils were undertaken during a dry environmental phase indicating late Holocene age. Other, earlier painting episodes also took place during dry environmental periods of the terminal Pleistocene and/or early Holocene. These results represent a rare opportunity to attain chronological information for rock art in conditions where insufficient carbon is present for radiocarbon dating.