Revegetated Sand Mining Areas,Swamp Wallabies and Remote Sensing: North Stradbroke Island,Queensland

Mining of mineral sands has taken place on North Stradbroke Island for over 40 years. Revegetation of mined areas creates a mosaic of seral classes. For a mine site in the northwest of the island, Landsat Thematic Mapper data were used successfully to map the distribution of seven seral classes resulting from mining rehabilitation. Faecal pellet counts were used to assess usage of these areas and surrounding natural forest by swamp wallabies, Wallabia bicolor. Results indicated that revegetated sites from 2 to 4 years in age were heavily used by wallabies. Older revegetated sites, dominated by senile Acacia cunninghamii, and offering little or no forage, were avoided. Swamp wallabies used revegetated sites for night-time feeding sessions and rested, during the day, in surrounding eucalypt forest.     

The changing pattern of urban fertility in eastern Australia 1966–1976

The article seeks to enhance understanding of post-transitional demographic change by examining the working out at the local level of the macro-scale societal processes underpinning the recent cyclic oscillation in Australian reproductive behaviour. Variations in urban marital and overall fertility between 1966 and 1971 and between 1971 and 1976 are described and analysed. In general, inter-urban variability in both measures diminished greatly, as did the explanatory power of ecological differentials, suggesting widespread acceptance of the small family norm throughout the study-area. While the process of convergence was continuous for marital fertility, structural changes contributed to later divergence of overall fertility levels, in accordance with Alonso's cyclical model of change. The current low level of residual inter-urban variability suggests that little more may be gained from analyses of this type.     

PROCEDURES FOR COMPARING AND COMBINING RADIOCARBON AGE DETERMINATIONS: A CRITIQUE

Archaeologists, along with other Quaternary researchers, seldom rely upon a single radiocarbon determination to provide an estimate of the age of the phenomenon which is the object of their study. There is an evident need for an explicitly formulated procedure for comparing sets of radiocarbon determinations from the same and from adjacent strata or sites, and for combining these where statistical and archaeological criteria indicate that this combination is warranted. The present contribution provides explicit modelling for a series of recommended procedures, a critique of previous methods, and paradigms for application of the recommended procedures.