δ18O Analyses of the Humpbacked Conch (Gibberulus gibberulus): Evaluating a Proxy for Reconstructing Sea-Surface Temperature at Chelechol ra Orrak,Palau

ABSTRACT

In Palau, Micronesia, marine resources, particularly shellfish, played a vital role in human subsistence for millennia. Despite the vast array of molluscan species in archaeological assemblages, there is a dearth of data on nearshore palaeoecology or prehistoric shellfish foraging practices. In this study, we analysed stable oxygen isotopes (δ¹⁸O) values present in the calcium carbonate shell of Gibberulus gibberulus from the Chelechol ra Orrak archaeological site to reconstruct average nearshore sea-surface temperatures (SST) from approximately 1500–1100 cal BP. Modern shellfish samples and environmental data were collected from intertidal zones near the site and x-ray diffraction (XRD) was employed to identify the biomineralogical composition of G. gibberulus. These steps provide necessary information for the selection of the proper oxygen isotope-to-SST conversion formula. The selected formula was applied to δ¹⁸O samples from archaeological shells to reconstruct prehistoric SST averages. The results of this proxy validation study verify that G. gibberulus accurately records ambient SST and can be used to reconstruct ancient nearshore conditions. These findings also contribute to the establishment of an environmental baseline, which can be used to examine how environmental changes may have influenced the availability of molluscan taxa that in turn influenced human subsistence practices through time.     

The archaeology of World War II karst defences in the Pacific

During World War II, the Japanese military, using either their own or civilian labour, excavated tunnels into the limestone of many Pacific islands and modified natural caves for use as command posts, hospitals, combat positions, storage, and shelter. Civilians also used caves to shelter themselves during the war. This article introduces the archaeology of WWII caves and tunnels referred to collectively as ‘karst defences.’ While karst defences exist across the Pacific, little is known about these sites both historically and archaeologically. Based on a study in Saipan, Commonwealth of the Northern Mariana Islands, and analysis of karst defence construction and function, this article demonstrates that karst defence use extends beyond what has been described in historical accounts. The authors find that the sites in Saipan were used by three different groups of people and identifies distinct Japanese military and civilian sites and evidence of post-war use by the United States.     

Muslim‐Christian Relations in Medieval Southern Italy

Abstract: This article examines the nature of relations between Muslims and Christians in southern Italy during the thirteenth century. In response to uprisings in Sicily, the emperor Frederick II transferred an estimated 20,000 Muslims to the city of Lucera in Apulia. Outside the Iberian Peninsula, Lucera came to have the largest Muslim population of any city in western Europe. Although the formation of the colony led to competition for resources between its inhabitants and the local Christian population, the members of the two religious communities often traded and collaborated. Social mobility was possible for the Lucerine Muslims, particularly through military service. Like Christians and Jews living in the dar al‐Islam, the Muslims of Lucera had a protected status, and they paid a tax called the jizya. They remained free to practice their religion. The heavy taxes paid by the Muslim colony at Lucera during its almost eighty‐year existence made it a valuable asset to the Hohenstaufen and Angevin crowns. Nevertheless, the settlement was dismantled in 1300 on the order of the Angevin king, Charles II, who gave a religious justification. The colony's history provides insight into the complex relations between Muslims and Christians in medieval Mediterranean Europe.     

Fuel Efficiency of Ancient Copper Alloys: Theoretical Melting Thermodynamics of Copper,Tin and Arsenical Copper and Timber Conservation in the Bronze Age Levant*

The melting of pure or alloyed copper, tin and arsenical copper ingots or recycled objects was a drain on the timber and dung fuel resources of many cultures. This paper suggests formulae grounded in thermodynamic principles in an attempt to estimate the energy requirements necessary to melt copper alloys common to both Old and New World cultures, with the goal of identifying consumption and conservation patterns. It has been suggested that tin bronze metallurgy was first adopted in the Levant during the Early Bronze Age (EB) IV, at the onset of the Late Holocene climate episode (c.2300–2000 bc ), becoming the most desired alloy by the Middle Bronze Age (MB) II (2000–1530 bc ) due to the ease of melting tin. To test this hypothesis, the formulae are applied here to all published Levantine EB IV – MB II copper alloys. Fuel conservation rates are proposed based on the thermodynamic formulae. Tin bronze is demonstrably more fuel efficient than pure copper. Due to the inherent difficulties in predicting the behaviour of arsenical copper compounds, it is suggested that melting experiments with representative alloys are conducted to further test and refine these energy relationships.     

FIRM SIZES AND ECONOMIC DEVELOPMENT: ESTIMATING LONG‐TERM EFFECTS ON U.S. COUNTY GROWTH, 1990–2000

This paper investigates the role of the business size distribution on income and employment growth in U.S. counties from 1990 to 2000. We measure the business size distribution as the share of employees across nine establishment size categories that range from microfirms (one to four employees) to large firms (1,000+ employees) and using three indices similar to a Gini coefficient. Results show that the business size distribution has a significant impact on county‐level growth patterns. Employment shares in small firms increase employment growth, but decrease income growth. One possible conclusion suggests policies emphasizing small firms and entrepreneurship during times of high unemployment.     

Contesting the Settler City: Indigenous Self‐Determination,New Urban Reserves,and the Neoliberalization of Colonialism

In settler colonial contexts the historical and ongoing dispossession and displacement of Indigenous peoples is foundational to understanding the production of urban space. What does it mean that cities in what is now known as Canada are Indigenous places and premised on the ongoing dispossession of Indigenous peoples? What roles do new urban reserves play in subverting or reinforcing the colonial‐capitalist sociospatial order? This paper examines these questions in relation to new urban reserves in Canada. Most common in the Prairie provinces, new urban reserves are satellite land holdings of First Nation communities located outside of the city. While the settler state narrowly confines new urban reserves to neoliberal agendas, First Nations are successfully advancing reserve creation to generate economic self‐sufficiency, exercise self‐determination, and subvert settler state boundaries. I argue that new urban reserves are contradictory spaces, as products and vehicles of settler‐colonial state power and Indigenous resistance and place‐making.     

District Voter Turnout and Dyadic Representation in Congress

One of the most important tools by which citizens can influence their elected officials' behavior is through voting—the electoral connection. Previous studies demonstrate that the opinions of voters are better represented than the opinions of nonvoters within an electoral jurisdiction, but we do not know whether jurisdictions with higher levels of aggregate voter turnout are better represented by their elected officials compared to those with lower levels of turnout. Using data compiled across five congressional sessions (2003–2013), this article investigates whether congressional districts with higher voter turnout are better represented by their member of Congress (MC). We find evidence that district voter turnout positively conditions the relationship between district opinion and MC voting behavior even after accounting for the possible effects of electoral competition and district income and racial demographics. In addition, we uncover evidence that partisan differences exist in this conditioning effect such that higher voter turnout enhances roll call voting responsiveness among Democratic MCs but not among Republican MCs. These findings suggest that congressional districts as a whole benefit from a political responsiveness standpoint when more of their constituents turn out to vote and contribute to literatures on political representation, political participation, democratic accountability, and the U.S. Congress.