Testing the efficacy and reliability of common zooarchaeological sampling strategies: a case study from the Caribbean

Zooarchaeological analysis typically involves implementing a suitable sampling strategy that provides meaningful information representative of a site under investigation. To test the efficacy of how various sampling procedures can influence interpretation of a faunal assemblage, we analyzed in full, a large assemblage of mollusks (minimum number of individuals [MNI] = 58,000+) from the late Ceramic Age (ca. AD 850–1440) site of Coconut Walk on the island of Nevis (northern Lesser Antilles, Caribbean). These remains were recovered from 25 discrete 1 × 1 m units within a larger 5 × 5 m trench that overlaid a dense midden deposit. Using statistical procedures, we compared the results of the number of identified specimens (NISP), MNI, and weight (g) of each mollusk taxon between both units and plana to determine how different sampling strategies would have affected the interpretation of mollusk composition across space and time had different sampling procedures been used. The results reveal that sampling less than 16% (4 out of 25 squares for this study) of a midden is likely to produce results outside of a 95% confidence interval for the population composition, with samples of connected squares having a higher likelihood to lie outside the interval. Discerning change between plana (or layers) may require a larger sample (i.e., 16%+). In addition, samples selected randomly or judgmentally will produce similar results, provided that proper spacing is given between units. The data in this case suggest that the midden was efficiently sampled for midden composition and key species at a rate of 16% of the surface area.     

Sampling seeds

Problems of sampling carbonized plant material are discussed. Firstly, the problem of actually selecting a sample in the laboratory is considered, and some experiments which investigate various procedures are described. Secondly, the statistical aspects of determining optimal sample sizes are considered. Formulae are given for calculating optimal sample sizes and confidence intervals. Upper bounds, which are independent of the total population size, are provided for the sample size required to achieve any desired accuracy.     

Formation processes of desiccated and carbonized plant remains – the identification of routine practice

The taphonomic or formation processes of desiccated and carbonized plant remains are reviewed and compared. Both types of assemblage frequently consist of material of mixed origin, but despite a high degree of mixing, the various routes of entry are still identifiable, and it is concluded that archaeological plant assemblages are more robust than often assumed. Case studies where the accurate identification of the formation processes has been critical are examined and guidelines on how to assess the formation processes are presented. It is argued that the coherence of archaeobotanical assemblages is due to the fact that they represent day-to-day routine behavioural practices. As these routine practices are socially and culturally structured, the identification of formation processes of plant remains can help identify social and cultural behaviour and changes therein.     

Plant Based Subsistence Strategy of the Medieval Ishmaelite (12th–13th c.) Population in the Carpathian Basin (NE-Hungary)

During the excavation carried out at the outskirts of Hajdúböszörmény (NE-Hungary) in 2011, the remains of a 12–13th century settlement were brought to light. Linguistic and historical research has previously presumed that one of the main centres of medieval Hungary’s Muslim (Ishmaelites) population is located in the northern-eastern part of the Great Hungarian Plain. At Hajdúböszörmény–Téglagyár ‘2’ archaeological site several household units were systematically sampled for archaeobotanical analysis. The recovered ceramics differ from the known ceramic production of the Árpád Age, whereas significant differences were detected in the zooarchaeological assemblage, too. The archaeobotanical record, representing 23 features, consists of 2679 items of charred macro-botanical remains that belong to 54 taxa. The record is predominated by the presence of cereals among which rye (Secale cereale L. subsp. cereale) and common barley (Hordeum vulgare L.) are the most frequent. Besides the dominance of cereals, pulses and vegetables, as well as gathered fruit remains were identified. By the comparison of results to other Árpád Age sites, we assume that the revealed ethno-archaeobotanical information identifies a population that used similar plant resources, but in a different way and strategy than the known Christian population of the Carpathian Basin.     

Dental morphological evidence for biological continuity between the A-group and C-group periods in lower Nubia

Data are presented on non-metric dental morphological traits in skeletal samples from the Lower Nubian A-Group (ca. 3100–2500 BC) and C-Group (ca. 2000–1500 BC) cultural periods. In order to examine possible biological differentiation between these two periods, their trait frequencies were analysed using the mean measure of divergence statistic. Results indicate biological continuity, consistent with in situ evolution, although the problem of small samples requires that these results be accepted with caution. Although the diffusion of ideas or material culture into the area through military and trade contacts is likely, any archaeologically observable cultural differences between these two phases are more consistent with local cultural evolution than with the importation of a new cultural system through the migration of a foreign population into the area. The timing of a population replacement in ancient Nubia that has been identified by other scholars should now be sought either before the A-Group period or after the C-Group.     

广富林遗址(2008年)浸水植物遗存分析

广富林遗址2008年度浸水保存的这批样品,从中发现了种类较丰富的植物遗骸,包括有葫芦、桃核、芡实、甜瓜、水稻、葎草、楝树果实等,通过量化统计和植物利用方式分析,我们认为遗址至少在广富林文化时期形成了包括粮食种植和瓜果蔬菜栽培的园圃农业经济体系,并在周代进一步地发展。     

Biological continuity between the A- and C-groups in lower Nubia: Evidence from cranial non-metric traits

Data are presented on 45 cranial non-metric traits in skeletal samples of the Lower Nubian A-Group (ca. 3100–2500 BC) and C-Group (ca. 2000–1500 BC) cultural periods. Results, based on the mean measure of divergence statistic, reveal biological continuity, consistent with interpretations of in situ evolution as opposed to models of discontinuity resulting from gene flow. Any differences between the A-and C-Group cultural phases that may be evident in the archaeological record are therefore more likely the result of local cultural evolution, rather than the introduction of new ideas, customs, and materials through the migration of a new population into this area. The problem of small samples necessitates that our results be accepted cautiously.     

Variation in health and socioeconomic status within the W. Montague Cobb skeletal collection: Degenerative joint disease,trauma and cause of death

This paper examines health differences between two distinct samples within an African American skeletal population by investigating variation in osteoarthritis (OA) patterns, the presence of enthesopathies, fractures and cause of death. Surveys and statistical treatments tested the hypothesis that two samples within a population that have different socioeconomic contexts will present associated differences in health. Binomial statistics were used to examine differences in OA patterns and prevalence within and between groups, and according to age and sex. These data were paired with information on the presence of enthesopathies at select muscle attachment and insertion sites to add another dimension to the assessment of mechanical strain. Finally causes of death, when available, were recorded to compare leading causes within and between samples, as well as with the larger population. Data reveal significant differences in the prevalence of OA between groups. Significant differences also presented when comparing the prevalence of unilateral and bilateral affect. Although a number of differences in health status observed can be attributed to age, relationships between the presence of OA and enthesopathies in a portion of the sample indicates that degenerative change and hypertrophy in the samples reflect both systemic and non‐systemic change. The presence and pattern of fractures and causes of death are also suggestive of differences in social context between the two samples. Copyright © 2010 John Wiley & Sons, Ltd.     

Taphonomy and interpretation: An analytical framework for social zooarchaeology

Taphonomy is central to many attempts to address social questions from archaeological animal remains, especially where those questions relate to practices of consumption and deposition. Without a clear analytical framework for this purpose, however, results can verge on the anecdotal. Following a review of the structure of taphonomy, this paper presents just such a framework designed to isolate archaeologically relevant patterns of behaviour through a comprehensive, quantitative analysis of numerous taphonomic variables. The typical formation processes shaping zooarchaeological assemblages are grouped into five broad stages and considered in reverse chronological order, allowing the analyst to work backwards towards the ‘death assemblage’ while identifying evidence of cultural practices. Particular attention is paid to differences between taxa, context types, phases, etc., that cannot be explained in mechanistic terms. This process is illustrated with selected data from a wider study of the Vinča (late Neolithic) site of Gomolava, Serbia, tracing the identification of one particular set of depositional practices. Copyright © 2010 John Wiley & Sons, Ltd.     

Estimating parent population of pottery vessels from a sample of fragments: a case study from inter-tidal surface collections,Roviana Lagoon,Solomon Islands

Archaeologists frequently interpret the duration and type of prehistoric occupation at a location/site from the relative abundance of prehistoric materials (accumulations research). Taphonomic factors have the potential to alter substantially the archaeological record leading to inaccurate assumptions about the nature of prehistoric settlement. Where vessel families of potsherds can be established, we provide a general method to estimate the parent population from which the sample of sherds derives, through analysis of vessel completeness of the sample. This provides a basis for archaeological interpretation of the scale of discard represented at a location. The approach used has broad applicability to many archaeological settings where behavioural inferences are made from poorly preserved ceramic samples. Statistical analysis of a ceramic assemblage from Roviana Lagoon stilt villages indicates that most of the ceramic assemblage has been destroyed over time. An unexpectedly severe taphonomic regime is inferred for this relatively sheltered landlocked lagoon setting. Rather than marking an ephemeral occupation, estimating a parent ceramic population indicates instead that early stilt village sites in the Solomon Islands region were probably permanently occupied for several centuries. Results also suggest that the relative absence of recorded Lapita sites in the main Solomon Islands, and possibly elsewhere in Near Oceania may be a result of a harsh taphonomic regime for the remains of stilt village occupation.     

Interpreting,dating, and reevaluating the botanical assemblage from tell Kedesh: a case study of historical contamination

Botanical assemblage including charred and mineralized macro plant remains were examined from tell Kedesh in the Upper Galilee, Israel. Flotation samples were collected from various contexts within and outside a large Persian-Hellenistic administrative building complex at tell Kedesh, dated to the 5th to the 2nd century BC, based on the archaeological material. Four AMS radiocarbon dates were obtained on plant macro remains recovered from the flotation samples from the complex. The radiocarbon dates range from the 9th century BC to 17th century AD. The discrepancy among the radiocarbon dates obtained from plant remains and those based on archaeological material can be attributed to bioturbation, including the deep burrowing of harvester ants. The study demonstrates the need for direct radiocarbon dating of the charred plant remains generally assumed to be of ancient origin. This research improves the understanding of depositional and postdepositional processes of plant macro remains and explains their mode of arrival, relevant for the sites with a long occupational history by humans and animals.     

On the use of species-area curves to detect the effects of sample size

Archaeologists have long been concerned about sample size. To monitor the relationship between sample size and the magnitude of a variable of interest, archaeologists have constructed three distinct kinds of what in ecology are known as species area curves (SACs). Sampling to redundancy SACs involve adding successive samples cumulatively to determine if the information provided by new samples is unique or redundant with information provided by earlier (smaller) samples. Rarefaction SACs involve pooling multiple samples and then rarifying the pooled sample—making it smaller probabilistically—so that the originally large but rarified sample may be compared with originally small samples. Regression SACs determine if there is a significant statistical relationship between samples of different sizes and the magnitude of the variable of interest per sample. Each of the three SACs used by archaeologists has a distinct analytical purpose.     

Bias in Fish Bone Recovery from Differential Collection Techniques and Its Impact on Cultural Interpretation in California

ABSTRACT

While studies on recovery bias are numerous in the literature, the current research focuses on defining best practices in field collection techniques to provide a more accurate representative of site constituents, particularly fish remains. Methods to determine best practices included use of 1/4-inch, 1/8-inch, and 1/16-inch mesh to process excavated material from 10 × 10?cm and 40 × 40 cm-sized bulk column samples and from a 1 × 1 m test unit. Fish remains were compared to determine density and diversity differences between the samples and how these different data sets may impact cultural interpretations. This research shows that while collection of larger column samples processed using a smaller mesh size provides a more robust data set, the taxonomic richness present in a 1 × 1 m test unit provides complimentary data that are critical to understanding subsistence trends as a whole.     

Edge damage distribution at the assemblage level on Middle Stone Age lithics: an image-based GIS approach

Lithic artifacts represent the most abundant cultural remains from Middle Stone Age sites in southern Africa. Of these, pointed forms (under a variety of names), blades, and flakes have long been recognized as the three most abundant general types, and retouch on all three is rare relative to similar forms of equivalent age elsewhere. Here we offer a new technique for documenting concentrations of edge damage on an assemblage level to infer taphonomic processes and to record usewear and retouch. This approach is specifically aimed at patterning on the assemblage scale, rather than on individual artifacts. We use points from a Middle Stone Age assemblage from Pinnacle Point Cave 13B, near Mossel Bay, South Africa, to illustrate the technique. Combining GIS, rose diagrams, and polar statistics, we were able to visually and statistically summarize lithic artifacts for patterns of edge damage. For the points made on quartzite in this assemblage, edge damage was found to be significantly patterned and taphonomic causes of the damage were rejected. The technique also opens avenues for many other quantitative analyses that are either impossible or difficult with current non-visual systems of recording, such as measurements of distance, angle, and area of edge damage.     

The Ethnoarchaeology of Reptile Remains at a Lake Turkana Occupation Site, Kenya

The role of reptiles in hominid hunter–gatherer subsistence in Pleistocene Africa has been largely overlooked. This study examines the reptile component of a modern lake shore camp (site 20) assemblage of low archaeological visibility. Site 20, located on the eastern shore of Lake Turkana, has been observed from its creation to burial. The site is an ideal modern analogue for the interpretation of African prehistoric archaeological sites. Patterns of element loss, and patterns of bone modifications, namely burn, cut and slice marks, are examined. From this baseline data, three conclusions are drawn regarding the interpretability of reptile remains found at archaeological lakeside sites: (1) the MNI of crocodile remains at a site is likely to be similar to the original number of individuals which contributed to the deposited assemblage; (2) the MNI estimates of the turtle component will be much less than the original number of individuals in the deposited assemblage; and (3) patterns of bone modifications can be related to hominid food procurement and processing activities.     

Comparative Points and Relative Thoughts: The Relationship between the Ahrensburgian and Hensbacka Assemblages

During recent years, it has become reasonably clear that a relationship does exist between the Continental Ahrensburgian, and the Hensbacka culture group found on the west coast of Sweden; indeed, this is a notion that was first mentioned as early as 1963. Although the nature of the relationship still remains rather diffuse, evidence is accumulating that tends to substantiate the proposition that the Hensbacka assemblage is a seasonal, and therefore regional, representation of the Continental Ahrensburgian culture group. In this paper, we will take a brief look at some of the typological similarities that exist between armatures found in the Ahrensburgian and Hensbacka assemblage and, at the same time, take into account the relativity of cultural norms.     

Turf roofs and urban archaeological build-up

Abstract

Studies of turves used to line the thatched roof of an old farm building in north-west England showed that they might have been a major source of mineral particles and plant and insect remains in some archaeological deposits. Conversely, it might be possible to recognise the remains of turf roofs on occupation sites from characteristic elements of the biota. Analysis of a sample of the accumulation on the floor of the building prompts reconsideration of the nature of ‘indoor’ and ‘outdoor’ insect assemblages.     

From Alloy Composition to Alloying Practice: Chinese Bronzes

We propose a new methodology based on standard statistical processes for displaying and rigorously comparing the alloy composition of archaeological bronze alloys. Although traditional approaches using visual comparisons of histograms of alloying elements in an assemblage of archaeological objects are adequate for observing differences between these distributions, we argue that differences in sample size cannot be adequately accounted for without using a statistical approach. We demonstrate this methodology by comparing the alloy composition of bronzes from the sequence of Bronze Age cultures in Central China—Erlitou, Erligang (Zhengzhou, or early Shang), Anyang (late Shang) and Western Zhou. We suggest that this approach allows the identification and rigorous comparison of ‘regional alloying practices’, which in turn enables us to link the alloy composition of the objects with the intentions and skills of foundry workers.     

Laser scanning confocal microscopy: a potential technique for the study of lithic microwear

The key problem restricting lithic microwear analysis is the lack of quantitative analysis to support qualitative assessments of different wear traces. This paper presents the reflective laser scanning confocal microscope (LSCM) as a new technique for the study of lithic microwear that has the potential to resolve this problem. Firstly, an example is presented that shows how the LSCM compares with conventional reflected light microscopy and scanning electron microscopy. This shows that images, rivalling that of the SEM, can be produced in similar timescales to conventional photomicrography and with no need for casting or sample preparation. The LSCM is also used to measure surface roughness of use-wear produced from working hide (dry, fresh and greasy), woodworking and antler working. This analysis demonstrates clear differences between the different wear polishes and the potential of the LSCM as a quantitative approach in lithic microwear research.