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Summary A 5,000-year-old Yersinia pestis genome (RV 2039) is reconstructed from a hunter-fisher-gatherer (5300–5050 cal BP) buried at Riņņukalns, Latvia. RV 2039 is the first in a series of ancient strains that evolved shortly after the split of Y. pestis from its antecessor Y. pseudotuberculosis ∼7,000 years ago. The genomic and phylogenetic characteristics of RV 2039 are consistent with the hypothesis that this very early Y. pestis form was most likely less transmissible and maybe even less virulent than later strains. Our data do not support the scenario of a prehistoric pneumonic plague pandemic, as suggested previously for the Neolithic decline. The geographical and temporal distribution of the few prehistoric Y. pestis cases reported so far is more in agreement with single zoonotic events.

SUMMARY: In the Duchy of Courland and Semigallia, corresponding to the southern and western parts of present-day Latvia, an iron industry based on blast-furnace technology, mainly using local bog iron ore, existed in the 17th and 18th centuries. Transfer of knowledge and skill through the recruitment of specialists from other countries of Europe was crucial to the development of this industry; technology was also re-exported to Russia and elsewhere. Recent archaeological and archaeometallurgical investigations supplement the written evidence, highlighting the specific local conditions that influenced the development of ferrous metalworking here in the early modern period. This article will not be available due to copyright restrictions (c) 2019 by T&F

The Stone Age site Riņņukalns, Latvia, is the only well-stratified shell midden in the Eastern Baltic. In this paper, we present new interdisciplinary results concerning its dating, stratigraphy, features, and finds to shed light on the daily life of a fisher population prior to the introduction of domesticated animals. The undisturbed part of the midden consists of alternating layers of unburnt mussel shell, burnt mussel shell and fish bone, containing artefacts, some mammal and bird bones, and human burials. Two of them, an adult man and a baby, are discovered recently and date to the calibration plateau between 3350 and 3100 cal BC, and to the later 4th millennium, respectively. Stable isotopes suggest a diet based heavily on freshwater fish, and this is supported not only by ten thousands of identified fish remains, but also by a fish bone concentration nearby the skull of the man, which is interpreted as remain of a grave gift (possible fish soup). Of special interest are the baby’s stable isotope values. It shows that the mother’s diet was atypical (perhaps because she was non-local), and/or that dietary stress during pregnancy increased fractionation between the mother’s diet and her bloodstream.

Using Ropaži Manor as an example, this article analyzes evidence of iron production and ironworking in Vidzeme in the sixteenth and seventeenth centuries, characterizing the first results f...

Zvejnieki, on Lake Burtnieks in northeastern Latvia, is the largest known prehistoric cemetery in the eastern Baltic; > 300 inhumations, most dating to c.7000–3000 cal BC, have been excavated. Archaeozoological and artefactual evidence from graves and nearby settlement layers show that throughout this period, the community depended on wild resources for subsistence, with a particular emphasis on fishing. Dietary stable isotopes (δ 15 N and δ 13 C) from human remains show significant dietary variation within the Zvejnieki population, in terms of access to and dependence on freshwater and marine species (Eriksson 2006); we provide new stable isotope data for another 13 individuals. Elsewhere, we have proposed a method to correct the calibrated radiocarbon ( 14 C) dates of prehistoric burials in the Lake Burtnieks region for dietary freshwater and marine reservoir effects (FRE/MRE) (Meadows et al. 2015). Here, we use this method to correct the dates of 40 individuals (including 3 from the nearby 4th millennium shell-midden site, Riņņukalns) for whom we now have both 14 C and stable isotope data, and test whether there is any evidence that human diets changed over time, rather than simply varying between contemporaneous individuals. Three interesting transitions can be discerned: a shift away from high-trophic-level foods in the earlier 6th millennium cal BC, a diversification of diets in the late 5th millennium, with both more terrestrial and more coastal foods consumed, and a narrowing of diets in the mid-4th millennium, to concentrate on freshwater resources.

The paper reflects upon recent international research at Zvejnieki in northern Latvia, a renowned complex of a burial ground and two settlement sites used in the Mesolithic and Neolithic. Since its discovery and first excavations in the 1960s, Zvejnieki continues to produce evidence that provides new grounds for understanding mortuary practises and ancient lifeways. This information is relevant for other contemporary sites in Europe revealing new and hitherto unexpected elements of burial traditions. It is suggested that the Zvejnieki population was partly mobile, and the site was one of the places to bury the dead. The ancestral link was established through transportation and use of occupational debris from more ancient sites and through the incorporation of earlier burial space or even burials into the new graves. The depth of a burial also appears to be a significant variable in ancient mortuary practices.

The Neolithic site Riņņukalns in the Lake Burtnieks/River Salaca area in northern Latvia is the only freshwater shell midden in the eastern Baltic Sea area. An excavation carried out in 2011 revealed an intact stratigraphy with alternating layers of unburnt and burnt mussel shells and yielded various kinds of archaeological finds, among them several thousand fish remains. To gain an understanding of the fish species and specimens caught by the Neolithic settlers, and to discern any temporal development in the fish species composition, we analysed fish remains from different sections and layers. Results from both the archaeozoological and stable isotope data, give evidence for a change in the relevance of fish species during the period of use, and they also provide information for reconstructing the former river and lake hydrology in the vicinity of the midden. The Stone Age landscape seems to have been very similar to the present situation, so that the study area has been an extraordinarily stable ecosyst...

A major assemblage of Mesolithic and Neolithic wooden artefacts has been recovered from the bed of the River Užava at Sise, in the coastal belt of western Latvia. New archaeological investigation has also produced wooden remains and other evidence of occupation on the riverbank. On the basis of multi-proxy environmental data and radiocarbon dating, this article offers a first attempt to place the human activity in a palaeolandscape context. The earliest evidence of human presence is provided by wooden artefacts dated to c. 10,500–9700 cal. BP, during the Ancylus Lake transgression. These remains are thought to reflect fishing activities in the shallows of the Ventspils Bay, which existed during the transgression. The regression that followed brought a return to river-valley conditions at the site, and the next recorded period of human activity, evidenced by 14C-dated antler tool finds, is associated with the beginning of the Littorina Sea transgression, culminating c. 7500 cal. BP. With the formation of a new Ventspils Bay/Lagoon, the Sise site, at or near the river mouth, would have regained its status as an advantageous fishing location. Archaeological finds indicate continued human activity c. 6000–4000 cal. BP, even though the sea level was now lower and this was no longer a river-mouth location. Such a pattern of recurrent human occupation during the early to middle Holocene, associated with repeated shifts of the shoreline, appears to be characteristic of the central region of the Baltic Sea Basin.

The Neolithic site of Priedaine in Jūrmala was excavated on a small scale in 2007–2008, yielding an assemblage of Comb Ceramics, along with unique wooden implements and fragments of pine-lath fishing structures. The environment and subsistence resources are indicated by plant macrofossil remains and a small faunal collection. Located by a palaeolake and also very close to the sea, the site, dated to c. 3700–3500 cal BC, would have been oriented towards aquatic resource exploitation. However, it had a wider range of functions, as indicated by the evidence of flint and amber processing. Key words: Neolithic, pottery, fishing gear, plant macro-remains, faunal remains, lake, coastal settlement. DOI: http://dx.doi.org/10.15181/ab.v23i0.1294

Aquatic food resources (fish and molluscs) were exploited intensively at Riņņukalns, a Neolithic freshwater shell midden at the outlet of Lake Burtnieks, north-eastern Latvia. Stable isotope data (δ 15 N and δ 13 C) from a rich fishbone assemblage and a wide range of terrestrial species complement published results on faunal samples from the famous prehistoric cemetery and settlement at Zvejnieki, on the same lake. Stable isotope data show that freshwater food resources made substantial but varying contributions to human diets at Zvejnieki and Riņņukalns throughout the Mesolithic and Neolithic. Our research has also shown significant radiocarbon freshwater reservoir effects (FRE) in aquatic species from Lake Burtnieks, which would presumably have affected the radiocarbon ages of prehistoric human remains, and may explain some apparent anomalies in published dates from Zvejnieki burials. We present new radiocarbon and stable isotope results from a multiple burial at Zvejnieki, of five contemporaneous individuals, whose remains are being re-examined to assess evidence of interpersonal violence. Contrary to earlier interpretations, our data show that differences between individuals in the amount of fish consumed would account for the 300-year spread in their radiocarbon ages, given the isotope data and our estimate of the effective FRE in local fish. Our FRE-corrected calibrated dates for these five individuals are therefore compatible with a single burial date. We propose that these models can be used to correct the calibrated radiocarbon ages of other Zvejnieki burials for dietary FRE, provided that the individuals concerned consumed mainly local resources. The same methodology can also be applied elsewhere, as long as local isotopic and FRE values are well understood, and values for terrestrial and aquatic species are sufficiently different.

The prehistoric shell middens of Atlantic Europe consist of marine molluscs, but the eastern Baltic did not have exploitable marine species. Here the sole recorded shell midden, at Riņņukalns in Latvia, is on an inland lake and is formed of massive dumps of freshwater shells. Recent excavations indicate that they are the product of a small number of seasonal events during the later fourth millennium BC. The thickness of the shell deposits suggests that this was a special multi-purpose residential site visited for seasonal aggregations by pottery-using hunter-gatherer communities on the northern margin of Neolithic Europe.

Riņņukalns is the only known prehistoric shell midden in the eastern Baltic, and is one of the few middens in northern Europe consisting mainly of freshwater mussel shells. Situated on the Salaca River at the outlet of Lake Burtnieks, in northeastern Latvia, the site was originally excavated in the 1870s, and reinvestigated several times over the following decades. A new excavation in 2011 showed that part of the midden remained intact. The new exposure, dated to the later 4th millennium cal BC, yielded rich fishbone and mollusk shell assemblages, herbivore, human and bird bones, and a wide range of artifacts typical of a subsistence economy based on fishing, hunting, and gathering. Human remains from burials excavated in the 1870s were also located in archives. The co-occurrence at Riņņukalns of human remains with a broad range of terrestrial and aquatic food remains provides an ideal setting to study freshwater reservoir effects and other isotopic signals of diet and mobility. The extent of 14C depletion in local freshwater resources is an essential parameter for such studies; on the basis of 14C ages of modern and paleoenvironmental samples, we estimate that the applicable reservoir age in Lake Burtnieks is in the order of 800–900 14C yr.

The shell-midden site of Riņņukalns in northern Latvia offers a rare opportunity to study long-term trends in ceramic production and function at a European hunter-fisher-gatherer site. Riņņukalns was occupied from the sixth millennium BC, with the midden developing from the later fourth millennium. Here, the authors discuss the chaîne opératoire and function of the Riņņukalns material, showing that pottery was used in both the pre-midden and midden phases primarily to cook aquatic and porcine resources. The technology used to produce these cooking vessels, however, changed over time, with new firing techniques associated with a shift to the use of shell temper. The results have implications for understanding prehistoric technology and subsistence in other parts of the world.