What can supraspecies richness tell us?

Biogeographers, ecologists, palaeontologists, and conservation managers often deal with checklists in which not all individuals have been identified to a species level, or the accuracy of species identification is questionable. Is it possible and credible to investigate species richness based on such checklists? Studies on macrofauna in the Far Eastern seas, eastern Arctic seas, and adjacent waters of the Pacific and Arctic Oceans suggest that in different habitats and for diverse taxa, species, and higher taxa richness strongly correlate with each other and increase with an expansion in the study area and sample size according to the species–area law. Such an increase is higher in the bottom zone than in the pelagic. Species and higher taxa richness also show a decrease from lower to higher latitudes, which is in line with the Humboldt–Wallace’s law. According to Willis’ law and self-similarity in the organisation of taxonomic levels, species richness can be assessed based on the genus, family, and order richness. In other words, supraspecies richness itself can tell us the same as species richness and therefore certain global patterns revealed at the species level may also be revealed at the supraspecies level. Such a concordance in general trends among richness parameters at different taxonomic levels in practice implies that species richness can be studied based on lists that lack species identifications or lists with doubtful species identification. We suggest bolder use of supraspecies richness in science and practice, discussing the disadvantages and advantages of this approach.     

Book reviews

Classical Persian Music: An Introduction. By Ella Zonis. Cambridge: Harvard University Press, 1973. xv + 233 pp. $16.50.

Sasanian Remains from Qasr‐i Abu Nasr: Seals, Sealings, and Coins. Edited by Richard N. Frye. Cambridge: Harvard University Press, 1973. 132 pp + 26 pp. of plates. $12.50.

The School Principal. By Jalal Al‐e Ahmad. Translated by John K. Newton, with an introduction and notes by Michael C. Hillmann. Minneapolis, Minn.: Bibliotheca Islamica, 1974. 144 pp. $5.00.     

“I Believe in Russia”

Petr Stolypin is better known than the many supporters who, although not prominent in government circles, did all within their power to assist his reform program–including Lev Tikhomirov (1852–1923), the former member of the People’s Will who became a major conservative thinker of his time.     

SOCIAL NETWORKS AND THE CONVERGENCE OF POPULATION ATTRIBUTES: A GENERALIZATION

ABSTRACT.  Analysis of social interactions has recently become an important area of economic research, and the focus of researchers in this area has increasingly shifted toward dynamic models. In one recent contribution, Brueckner and Smirnov (2007) analyze the evolution of population attributes in an exceedingly simple model, where an agent's attributes at time t are equal to the average attribute value among his acquaintances. The pattern of acquaintances in the population is determined by the social network, and Brueckner and Smirnov (BS) explore the effect of network characteristics on the convergence of population attributes over time. They show that some simple sufficient conditions on the network structure ensure convergence to a "melting-pot" equilibrium where attributes are uniform across agents. The present paper provides a generalization of BS's analysis, allowing for a more general form of the rule governing the evolution of population attributes. The analysis shows that BS's previous conclusions continue to hold under this generalization, while also providing a result that can be applied more generally to other models.     

Book reviews

A Modern Peraian Prose Reader. Edited by H. Kamshad. Cambridge: Cambridge University Press, 1968. viii + 249pp. $9–50.     

Preliminary neutron diffraction study of two fenestrated axes from the ‘Enot Shuni' Bronze Age cemetery (Israel)

Neutron diffraction (ND) analyses of ancient metals show that this method is capable of detecting differences in the inner composition and microstructure of ancient metal objects. Here, ND measurements were conducted on two ‘eye shaped’ axes from the end of the 3rd-beginning of the 2nd millennium BC. The objects were excavated from the ancient cemetery of ‘Enot Shuni' Israel; one is made of bronze and the other of silver. Both artefacts are rare finds, with the silver axe unique in the archaeology of Israel, and therefore had to be analysed locally. For that purpose, a newly assembled diffractometer (KARL) at the IRR-1 of the Nuclear Research Centre (Soreq, Israel) was used. ND measurement on the bronze axe revealed the existence of an α-phase with a range of Cu/Sn ratios (Cu–Sn solid solutions) and some amount of a δ-phase (intermetallic compound of Cu and Sn). The silver axe ND pattern shows the existence of an α-phase (Ag–Cu solid solution) and some amount of copper metal. Our ND data are discussed in comparison with XRF surface measurements and thermal neutron radiography. The results are shedding more light on the in-depth material composition profile, as well as on the objects’ structural and compositional affinities, and help to better understand the production processes and assist in conservation decisions.     

Intentional human burial: Middle Paleolithic (last glaciation) beginnings

This paper analyzes intentional burial as a historical phenomenon. Mortuary practices are viewed as a particular sphere of human activity, involving the transfer of the physical remains from one natural environment to another. The general and specific laws governing mortuary treatment and its development are discussed, and the earliest known deliberate burials—those of the Middle Paleolithic—are examined against this theoretical background. Middle Paleolithic groups invented almost all the basic ways of treating a corpse before burial and almost all the ways of burial itself. They seem to have developed a cult of the dead, based upon dualities such as concealment vs exposure of the body, burial of the body intact vs disarticulated, burial of the whole body vs parts of it only, and so on. It is shown that, in the Middle Paleolithic, there were centers of taphological activity, that inhumation was selectively practiced on only a small minority of the population, that men were buried much more often than women, and that the patterns of burial seem to have been independent of identifiable factors such as human physical type or level of technology.     

Urban planning in Russia: towards the market

The article discusses the recent transformation of the Russian system of urban planning from the socialist system to a market one. The focus is on new problems of the Russian planning system, the relationship between the new and old systems, and the role of the bureaucracy and participation. A case study of the city of Moscow develops the subject at a metropolitan level. It is argued that Russian planning in transition has been planning in crisis and it is only now becoming an effective and pluralistic social institution. The recent revival of planning has been much dependent on Russia's regions; a diversification of planning systems throughout the country is expected.