Historical and contemporary mating patterns in remnant populations of the forest tree Fraxinus excelsior L.

Genetic variation at microsatellite markers was used to quantify genetic structure and mating behavior in a severely fragmented population of the wind-pollinated, wind-dispersed temperate tree Fraxinus excelsior in a deforested catchment in Scotland. Remnants maintain high levels of genetic diversity, comparable with those reported for continuous populations in southeastern Europe, and show low interpopulation differentiation (Theta = 0.080), indicating that historical gene exchange has not been limited (Nm = 3.48). We estimated from seeds collected from all trees producing fruits in three of five remnants that F. excelsior is predominantly outcrossing (t(m). = 0.971 +/- 0.028). Use of a neighborhood model approach to describe the relative contribution of local and long-distance pollen dispersal indicates that pollen gene flow into each of the three remnants is extensive (46-95%) and pollen dispersal has two components. The first is very localized and restricted to tens of meters around the mother trees. The second is a long-distance component with dispersal occurring over several kilometers. Effective dispersal distances, accounting for the distance and directionality to mother trees of sampled pollen donors, average 328 m and are greater than values reported for a continuous population. These results suggest that the opening of the landscape facilitates airborne pollen movement and may alleviate the expected detrimental genetic effects of fragmentation.

Reclaiming Community? From Welfare Society to Welfare State in Australian Catholic Social Thought

Influenced by both conservative and left wing communitarian thinking, current debate about welfare governance in Australia reflects an inflated evaluation of the potential role of the third sector or civil society organisations in the production fo welfare. This paper gives an overview of twentieth century Australian Catholics social thinking about state, market and civil society relations in the production of welfare. It highlights the neglected, historical role of the Catholic Church in promoting a 'welfare society' over a 'welfare state' in Australia. It points to the reasons for the Church's later embrace of the welfare state and suggests that these reasons should make us deeply sceptical of the current communitarian fad.