Thousand years of vegetation history revealed by pollen in a sandy soil,central Netherlands

Abstract

Within the scope of an interdisciplinary research project to determine the genesis and age of small clusters of oak trees, three soil sections in and three outside oak clusters in an ancient woodland/heath on the Veluwe, central Netherlands, were sampled for palynological analysis. The sections within the clusters show an undisturbed development from the Medieval period onwards, the sections outside the clusters are missing ca. 15 cm because of sod cutting associated with plaggen soil formation. The rate of downward movement of pollen was established, using known dates from the near surroundings.     

Some Results and Prospects of Research on the Productivity of Forest Biogeocenoses

A review of Soviet research on the productivity of forest biogeocenoses finds confusion in terminology and urges general agreement on specific concepts and terms. Research has thus far been limited to the plant aspect of the forest communities, ignoring the animal and microbial communities. Changes in the amount of litter fall and phytomass from one natural zone to another are analyzed for spruce and oak communities and for forest biogeocenoses of various ages. A program for future research is outlined.     

Dendrochronological and radiocarbon dating of subfossil wood from the Morava River basin

The paper deals with dendrochronological and radiocarbon dating of subfossil trunks found in the basin of the Morava River. The research into subfossil trunks had been conducted in the Czech Republic in the past but the research stopped in 2001. 160 records of measurements of subfossil, predominantly oak trunk samples, are preserved from that time. Three years ago the research was reopened and again the most trunks were found in the basin of the Morava River. 92 samples of oak trunks and 7 samples of other tree species (poplar, elm, maple, beech) were taken from selected sites. The samples were processed in compliance with the standard dendrochronological methodology. To date the samples, Czech, Austrian, Polish and German standard chronologies were used. In cases when the dendrochronological dating was unsuccessful, the samples were sent for radiocarbon dating. In total, 35 samples were dated, mainly by the radiocarbon method. Subfossil trunks from gravel pit Tovačov were dated and classified into 4 different periods, the oldest being from 2780–2190 BC. In Osek nad Bečvou, the samples were taken from two sites. Whereas from the 4 trunks taken in the river channel each was from a different period, the trunks from the gravel pit come from 981–1015 AD. The trunks found in the Morava River basin near Strážnice were dated to the 10^th–15^th century. In the future, we expect to extend the amount of the acquired samples with the aim to create a link to the existing standard chronology or to create a long floating average treering curve.     

Oaks,tree-rings and wooden cultural heritage: a review of the main characteristics and applications of oak dendrochronology in Europe

We overview the recent development of oak dendrochronology in Europe related to archaeology and art-history. Tree-ring series of European oaks (Quercus robur and Q. petraea) have provided a reliable framework for chronometric dating and reconstruction of past climate and environment. To date, long oak chronologies cover almost the entire Holocene, up to 8480 BC and the network over the entire area in which the two oaks grow is being improved. We present the main characteristics of oak ring series and discuss the latest methodological advances in defining the calendar year in which the tree-rings were formed and in interpreting such dating in terms of the age of a wooden object. Dendrochronology has established itself as a standard dating tool and has been applied in a wide variety of (pre-)historical studies. Archaeological wood, historical buildings, works of art (such as panel paintings and sculptures) have been successfully investigated. Recent advances in dendro-provenancing have helped to obtain more information on the timber trade in the past. Information on past forest structures, silviculture and timber use have become available through scrutinizing historical and contemporary ring-width patterns.     

Revealed by Waves: A Stratigraphic,Palaeoecological, and Dendrochronological Investigation of a Prehistoric Oak Timber and Intertidal Peats,Bay of Ireland,West Mainland,Orkney

An oak timber was discovered in 2013 within intertidal peats at the Bay of Ireland, Stenness, Orkney, representing a unique archaeological find. Subsequent excavation and rescue of the timber took place in 2014 to investigate its stratigraphical relationship before further eroding. Dendrochronological and morphological study identified the timber as a possible radially split log, c. 150 years of age when felled. No dendrochronological match was possible, and a wiggle-match date obtained provided a Later Mesolithic felling date of 4410–4325 cal BC. This timber is the first and only evidence so far for the use of oak in Mesolithic Orkney. The timber is significant palaeoecologically, suggesting oak may have been indigenous to Orkney. This adds to a growing argument for the existence of areas of “true woodland”. Pollen evidence shows the timber was deposited within reedswamp, fringed by willow-birch carr-woodland, with oak unlikely to have been growing in the immediate location. High microscopic and macroscopic charcoal values indicate Later Mesolithic communities exerted influence on this wetland using burning as a tool for landscape modification. It is unknown what the timber represents; it may have been for construction purposes or as a marker/possible landing place showing the path to the Loch of Stenness.     

Climate influence on radial increment of oak (Quercus SP.) in central Poland

The study investigates the influence of climate conditions on radial increment of oak, with special concern to the situations when analysed trees formed conspicuously wider or narrower tree-rings. The research material was collected in four locations in central Poland within natural range of pedunculate and sessile oaks. The elaborated residual chronologies were correlated with CRUTS 2.1 climate data. The analyses included thermal and pluvial conditions spanning from April of the year prior to ring formation to September of the current growth year. Special interest was paid to simple water ability index that combined both temperature and precipitation during the vegetation season. Additionally, pointer year analysis was carried out to determine situations when conspicuously smaller or larger increment was formed. Investigated chronologies cover the period of 1927?C1992 (?ochów), 1845?C1992 (P?o??sk), 1868?C1992 (Pu?tusk), and 1796?C1992 (Soko?ów). The analysed oaks from sites in central Poland exhibit growth patterns comparable with those known form previous studies concerning that species, where influence of precipitation (higher and positive) and temperature (negative) have been observed. Extreme growth reactions expressed by negative and positive pointer years turned to present high dependence of analysed oak?? growth on water availability during vegetation season.     

Forty Years of Ming and Qing Research Following China’s Opening Up and Economic Reform

Increasingly, Chinese history is becoming a more significant component of academic international history. This is particularly true in light of the Chinese economic reform, whereby historical narrative has been able to go beyond more traditional standards of periodization, allowing, for example, Ming and Qing-era historical research to grow and develop qualitatively as well as quantitatively. In this sense, the field has greatly benefitted from the “ideological liberation” which followed in wake of the reform. However in a broader sense, this development is also closely related with academic exchange. Communications among domestic and international scholars of Ming and Qing history, as well as of international history, has normalized in the years following the reforms. This has not only led to a considerable influx of “overseas” historical research to China’s mainland, but has also allowed for a larger-scale access to and citation of Chinese historical research by these overseas scholars. Domestic and international scholars have, from this, established much closer academic relations with one another. This tremendous progress made within the field Ming and Qing-era historical research during the past forty years was established upon the foundation of Chinese scholars’ assiduous efforts as well as their increasingly frequent exchanges with international scholars and academics.     

Near infrared spectroscopy as a tool for archaeological wood characterization

Archaeological wood, as most of natural materials, is slowly decomposing on the archaeological site due to various biological factors. Rapid and accurate estimation of the degradation level is extremely important for optimal restoration and conservation. The goal of this research was to verify the effectiveness of Fourier transform near infrared (FT-NIR) spectroscopy for archaeometry. The important advantage of the NIR spectroscopy is its accuracy, simplicity and ability to perform very high number of tests without needs of any destruction to the workpiece. Five oak pieces of the archaeological wood collected from waterlogged sites in Poland have been used. Cellulose and lignin contents, as well as crystallinity and the degree of polymerization were measured with standard reference methods and compared to the contemporary wood. The near infrared spectra represent all the physical/chemical changes of the wood due to waterlogging. This technique was successfully validated in rapid estimation of the cellulose and lignin contents. The method explored in this research might be a novel tool assisting experts in evaluation of the degradation state of archaeological and historical wooden materials.     

The Sandford Orleigh overmantle: a 19th-century Tudor puzzle

In the 1830s a colourful Devon landowner and industrialist, George Templer, had a new house built for himself at Sandford Orleigh, on the outskirts of Newton Abbot, Devon. One of the principal rooms within was furnished with an imposing overmantle that was created from his collection of antique oak carvings. The overmantle, much neglected, was donated to the local museum in 2008, whereupon a conservation and research project exploring it was launched. This resulted in the discovery that at the heart of this piece lay a Tudor-period reredos, created in the then-fashionable Renaissance style: all’antica. The style of work seen in this overmantle compares closely to a screen in nearby Bradley manor and the south door of Totnes church.     

Genetic analysis of archaeological wood remains: first results and prospects

A total of 51 ancient oak wood samples originating from various European archaeological sites, dating from the Neolithic period to the 18th century, were assayed for the presence of reproducible chloroplast (cp) DNA sequences. Five polymorphic chloroplast fragments were targeted. Only five of the samples could be fully genetically characterised, revealing four different oak cpDNA haplotypes. In all cases, the haplotypes detected on ancient woods and the haplotypes characterised from fresh samples from the same localities matched. Overall, this congruence is consistent with a genetic continuity between ancient and modern European oaks, confirming the hypothesis that the mapped genetic patterns largely reflect the original structure that established during the post-glacial. This stability of the genetic structure implies that, in the future, the technique could be used to infer or confirm the transport of wood by man, providing interesting perspectives for the genetic analysis of ancient woods.     

Advancing the Analysis of Past Human/Plant Relationships: Methodological Improvements of Artefact Pollen Washes

The ‘pollen washes’ technique, based on the analysis of the pollen embedded in the porous surface of archaeological artefacts, is developed for investigating past plant usage and consumption and to characterize the functionality of artefacts related to plant processing, gathering and storage. The research presented results in relevant methodological improvements of this technique, which has never previously been applied on materials from European contexts. The improvements allow: (1) faster analysis of a broad series of artefacts or those with large use‐surface areas likely to retain more pollen; and (2) a more thorough, deeper and precise cleaning method, allowing the study of smoother artefacts. Finally, the recovery of Trifolium‐group pollen from a macro‐lithic tool from Xicotó rock shelter (Montsec ranges, Spain) demonstrates that the pollen washes technique can reveal new insights into both the use and consumption of wild and domestic plants by prehistoric societies, and the functionality of archaeological objects whose interpretation is still problematic.     

Use-wear analysis of obsidian artifacts from Later Stone Age shell midden sites on the Red Sea Coast of Eritrea,with experimental results

This paper presents results of use-wear study on lithic artifacts from two Later Stone Age sites (Gelalo and Misse) on the Red Sea Coast of Eritrea. The sites produced large quantities of lithic artifacts in association with mollusk shells and ostrich eggshell beads, but it is unclear if all the stone tools were required for bead and mollusk shell processing. The study involved recording of microfracture damage traces in order to infer the use-material and the manner in which the artifacts were used. A large percentage of the analyzed samples from Gelalo and Misse preserve wear patterns suggestive of human use. The diagnostic wear types include: (1) dense step, snap (crushing) and hinge fractures typically confined on the working edges, and (2) feather scars organized in a scalar manner visible on the ventral and dorsal surfaces of the active parts. The observed damage patterns suggest cutting and engraving medium to hard materials. The evidence is incomplete for more generalization about the specific activities carried out at the sites. A brief experimental study involving ostrich eggshell drilling, oak twig sawing and bark scraping, meat slicing, and mollusk shell sawing and drilling was carried out to aid interpretation of wear features observed on the archaeological specimens. Wear traces produced by sawing mollusk shell and oak wood showed close affinity to those observed on the archaeological specimens. The study contributes important information about early Holocene site use on the Red Sea Coast of Eritrea. The close association of used lithic artifacts, symbolic objects (beads) and broken shell remains indicates that the sites were habitation areas.     

Some thoughts on art-historical dendrochronology

Imported timbers pose potential problems for the dendrochronologist. The problem is general and any particular dendrochronologist may run into difficulty when he attempts to correlate an exotic ring pattern against an indigenous chronology. Sufficient evidence exists to suspect that high quality oak boards and planks were extensively imported into England in medieval times. However, chronologies constructed from just such boards, namely the art-historical chronologies, have been treated as indigenous without being proven to be so. Almost identical comments can be made with respect to art-historical chronologies constructed by German workers using supposedly indigenous Flemish oak panels. This article explores how failure to allow for importation may well call into question the dating of these art-historical chronologies and in addition demonstrates how an art-historical dating system has been created wherein erroneous placement of the chronologies could escape detection (this latter aspect may well make the argument of general interest to scientists).     

Radiocarbon and dendrochronological dating of Sub-fossil oaks from Smarhoń riverine sediments

Sub-fossil oaks from Smarhoń in Belarus have been investigated and tree-ring chronologies were assembled. According to radiocarbon dating, the oldest oak grew from 5782–5612 cal BC and the youngest from 1575–1747 cal AD. Radiocarbon and dendrochronological dating of 97 samples, four single series, 10 mean curves (containing 2–9 series) and three chronologies (10–25 series) were constructed. The longest chronology (No. 16), covering 549 years, was absolutely dated against various oak chronologies of Polish/Baltic origin to AD 778–1326. Germination and dying-off phases were assessed from the three best replicated chronologies. A spectral analysis of the chronologies provided cycles of variable length, on average of 25 years.     

Secondary migration of immigrants to Canada: an analysis of LSIC wave 1 data

Immigrant settlement patterns are inherently more dynamic and diverse than those observed at the time of the census. In particular, it is likely that the intended settlement pattern (the destination stated to immigration officials at the time of entry) differs from the initial settlement pattern (the actual settlement location). At best, previous research has relied upon census data to illuminate these patterns, but only allowing a rough estimate of the dynamics of the system. As a result, spatial adjustments to the settlement process are only partially understood, with limited distinctions between recent and earlier arrivals, those who settled after a series of moves, or those that did not move at all after arrival. Using the recently released Longitudinal Survey of Immigrants to Canada (LSIC), this article examines differences in the evolution of the settlement pattern of immigrants in their first 6 months in Canada, potentially illuminating differences between the intended and initial settlement patterns. The advantage of this file is its longitudinal nature, allowing settlement location of the same individuals to be traced over time. Results suggest that while mobility is high among the newest arrivals, the intended and initial destinations are largely equivalent.     

DENDROCHRONOLOGICAL DATING OF THE CHIEF JOHN ROSS HOUSE,ROSSVILLE, GEORGIA

Abstract

The Chief John Ross House is a two-story oak (Quercus spp.) and eastern red cedar (Juniperus virginiana L.) log structure located in downtown Rossville, Georgia. The log structure was reportedly built in 1797 by John McDonald, grandfather of Chief John Ross, for his Cherokee bride. This construction date first emerged in the 1950s, when efforts were underway to save the structure. Historical documents, however, indicate that the structure did not exist until 1816. Ross lived at the structure until 1828, when he was elected the last principal chief of the Cherokee before the tribe’s forced removal during the Trail of Tears. Using dendroarchaeological techniques, 28 archaeological (increment) cores were removed from the oak portion of the structure in 2007 to verify the construction date. Cores were processed and dated using the white oak (Quercus alba L.) Piney Creek Pocket Wilderness, Tennessee chronology. Of the 28 cores, 22 (from 19 trees) yielded cutting dates clustered around the winter of 1816–17, indicating the structure likely was not built by McDonald. This construction date does, however, make it possible for Chief John Ross himself to have been the builder. This correction to history should increase public attention and preservation efforts at the structure.     

Iberian Dendrochronology and the Newport Medieval Ship

At the time of the discovery of the Newport medieval ship, it proved impossible to date the timbers used in its original construction through dendrochronology. Associated British timbers and artefacts provided dating to the mid 15th century, with the latter pointing to strong Iberian connections. The development of regional oak ring‐width chronologies in the Basque Country, and their extension back in time to overlap with the ring‐width mean developed for the Newport Ship, has allowed absolute dating and provenance of timbers used in its original construction. Further research is required to clarify the geographical source of the timbers and to develop a high‐resolution network of tree‐ring data for the region.     

Examining Land-Use through GIS-Based Kernel Density Estimation: A Re-Evaluation of Legacy Data from the Berbati-Limnes Survey

The use of archaeological survey data for evaluation of landscape dynamics has commonly been concerned with the distribution of settlements and changes in number of recorded sites over time. Here we present a new quantitative approach to survey-based legacy data, which allows further assessments of the spatial configuration of possible land-use areas. Utilizing data from an intensive archaeological survey in the Berbati-Limnes area, Greece, we demonstrate how GIS-based kernel density estimations (KDE) can be used to produce cluster-based density surfaces that may be linked to past land-use strategies. By relating density surfaces to elevation and slope, it is also possible to quantify shifts in the use of specific environments on a regional scale, allowing us to model and visualize land-use dynamics over time. In this respect, the approach provides more multifaceted information to be drawn from archaeological legacy data, providing an extended platform for research on human-environment interactions.     

Eyes on the alley: children’s appropriation of alley space in Riverdale,Toronto

ABSTRACT

Recent research suggests that numerous positive physical, cognitive, and social benefits can be derived from independent mobility and play agency amongst children, necessitating an understanding of how physical and social environments facilitate this development. This study involved parents, and children aged 9–13 from twelve households in the neighbourhood of Riverdale in Toronto. Using a mapping exercise to instigate discussion, participants were asked to describe where, how, and with whom play occurs in their neighbourhood. A reoccurring theme emerged amongst households that border a back alley where parents perceived this space as safer allowing them to grant greater independent mobility to their children and use this space as an intermediary tool to prepare their children for greater independence. For children, this space serves as one of creative appropriation, granting them access to more space and friends to play with. Situated within the context of age-friendly cities, this research identifies several socio-spatial qualities found in alleys that have the potential to contribute to the discussion of more inclusive city-building practice.