Archaeology and cultural evolution theory both predict that environmental variation and population size drive the likelihood of inventions (via individual learning) and their conversion to population-wide innovations (via social uptake). We use the case study of the adoption of the bow and arrow in the Great Basin to infer how patterns of cultural variation, invention, and innovation affect investment in new technologies over time and the conditions under which we could predict cultural innovation to occur. Using an agent-based simulation to investigate the conditions that manifest in the innovation of technology, we find the following: (1) increasing ecological variation results in a greater reliance on individual learning, even when this decreases average fitness due to the costs of learning; (2) decreasing population size increases variability in the types of learning strategies that individuals use; among smaller populations drift-like processes may contribute to randomization in interpopulation cultural diffusion; (3) increasing the mutation rate affects the variability in learning patterns at different rates of environmental variation; and (4) increasing selection pressure increases the reliance on social learning. We provide an open-source R script for the model and encourage others to use it to test additional hypotheses.

Antarctic soils provide an excellent setting to test biogeographical patterns across spatial and environmental scales given their relatively simple communities and the dominance of physical factors that create strong environmental gradients. Additional urgency is given by the fact that their unique terrestrial communities are the subject of conservation efforts in a rapidly changing environment. We investigated relationships of soil community assembly and alpha and beta diversity with climatic and environmental parameters across regional and local scales in Maritime Antarctica. We sampled from a regional gradient of sites that differ in habitat severity, ranging from relatively favourable to harsher physicochemical conditions. At the regional scale, bacterial community characteristics and microarthropod abundance varied along this severity gradient, but most measures of fungal communities did not. Microarthropod and microbial communities differed in which soil and climate parameters were most influential, and the specific parameters that influenced each taxon differed across broad and fine spatial scales. This suggests that conservation efforts will need to focus on a large variety of habitat characteristics to successfully encompass diversity across taxa. Because beta diversity was the result of species turnover, conservation efforts also cannot focus on only the most biodiverse sites to effectively preserve all aspects of biodiversity.

Possession Island was one of the first landing places in the Antarctic region, now more than 180 years ago, yet there is little scientific knowledge of this island archipelago in the western Ross Sea. Although the islands are often passed and have been landed on for a few brief hours a number of times, the area is a challenging environment to visit or work in, as weather, sea and ice conditions can be unpredictable.

This paper documents the discovery of the islands, and their history of exploration, the broad range of fleetingly conducted science endeavours, weather and climate and since the 1990s, eco-tourism visits. The islands deserve to be better known, and their rich history provides a foundation for future research and eco-tourism.

Tree-ring series offer considerable potential for the development of environment-sensitive proxy records. However, with traditional increment cores, only small amounts of wood are often available from annual tree-ring sequences. For this reason, it is important to understand the reliability (and reproducibility) of radiocarbon measurements obtained from small-sized samples. Here we report the F14C results from the Chronos 14Carbon-Cycle Facility of modern tropical Australian tree samples over a range of four graphite target sizes from the same rings. Our study shows that similar precision can be obtained from full-sized, half-sized, as well as small-sized graphite targets using standard pretreatment and analysis procedures. However, with a decline in sample size, there was an increase seen in the associated variance of the ages and the smallest target weights started showing a systematic bias. Wiggle-matching accuracy tests, comparing the Southern Hemisphere post-bomb atmospheric calibration curve to the different sample weight sequences, were all significant except for the 200 μgC graphite targets. Our results indicate that samples smaller than 350 μgC have limited accuracy and precision. Overall, reliable measurements of F14C sequences from tree-ring records across a range of sample sizes, with best results found using graphitized samples >350 μgC.

Many of the most contentious questions that concern the ecology of helminths could be resolved with data on helminth abundance over the past few decades or centuries, but unfortunately these data are rare. A new sub-discipline – the historical ecology of parasitism – is resurrecting long-term data on the abundance of parasites, an advancement facilitated by the use of biological natural history collections. Because the world's museums hold billions of suitable specimens collected over more than a century, these potential parasitological datasets are broad in scope and finely resolved in taxonomic, temporal and spatial dimensions. Here, we set out best practices for the extraction of parasitological information from natural history collections, including how to conceive of a project, how to select specimens, how to engage curators and receive permission for proposed projects, standard operating protocols for dissections and how to manage data. Our hope is that other helminthologists will use this paper as a reference to expand their own research programmes along the dimension of time.

The archipelago of Svalbard is a good example of an Arctic locale undergoing rapid changes on multiple levels. This contribution is a joint effort of three anthropologists with up-to-date ethnographic data from Svalbard (mostly Longyearbyen and Barentsburg) to frame and interpret interconnected changes. The processes impacting Svalbard are related to issues such as geopolitical interests, and increasing pressure by the Norwegian government to exercise presence and control over the territory. Our interpretations are based on a bottom-up approach, drawing on experiences living in the field. We identify three great ruptures in recent years – the avalanche of 2015, the gradual phasing out of mining enterprises and the COVID-19 pandemic – and show how they further impact, accelerate or highlight preexisting vulnerabilities in terms of socio-economic development, and environmental and climate change. We discuss the shift from coal mining to the industries of tourism, education, and research and development, and the resulting changed social and demographic structure of the settlements. Another facet is the complexity of environmental drivers of change and how they relate to the socio-economic ones. This article serves as an introductory text to the collection of articles published in Polar Record in 2021/2022 with the overarching theme “changing Svalbard”. Issues discussed range from socio-economic change and its implications for local populations including identity of place, through tourism (value creation, mediation, human–environment relations, environmental dilemmas, balancing contradictory trends), to security and risk perception, and environmental and climate change issues.

The socio-cultural and environmental shifts that have taken place in southern Italy over the last 30 years can usefully be traced by their impact on folkloric texts which present modifications that tend to emerge progressively over time. An analysis of such modifications to a body of southern Italian folkloric texts – as used in practice over the last three decades – finds that these reflect and are driven by changes in the people's living environment denoting a cultural dilution and a growing distance between people and the natural world, particularly the land. These modifications also expose a shift of emphasis from ends (e.g. food) to means (e.g. money), indicating increased commercial dependence driven by socio-economic changes. These changes are also reflected in folkloric texts which demonstrate a decline of direct, physical experience of some aspects of the natural world while including references relating to the local environment. Understanding these processes allows us to gauge the extent to which verbal folklore connects contemporary societies to past knowledge.