Simple shade plots aid better long-term choices of data pre-treatment in multivariate assemblage studies

Shade plots, simple visual representations of abundance matrices from multivariate species assemblage studies, are shown to be an effective aid in choosing an overall transformation (or other pre-treatment) of quantitative data for long-term use, striking an appropriate balance between dominant and less abundant taxa in ensuing resemblance-based multivariate analyses. Though the exposition is entirely general and applicable to all community studies, detailed illustrations of the comparative power and interpretative possibilities of shade plots are given in the case of two estuarine assemblage studies in south-western Australia: (a) macrobenthos in the upper Swan Estuary over a two-year period covering a highly significant precipitation event for the Perth area; and (b) a wide-scale spatial study of the nearshore fish fauna from five divergent estuaries. The utility of transformations of intermediate severity is again demonstrated and, with greater novelty, the potential importance seen of further mild transformation of all data after differential down-weighting (dispersion weighting) of spatially clumped' or schooled' species. Among the new techniques utilized is a two-way form of the RELATE test, which demonstrates linking of assemblage structure (fish) to continuous environmental variables (water quality), having removed a categorical factor (estuary differences). Re-orderings of sample and species axes in the associated shade plots are seen to provide transparent explanations at the species level for such continuous multivariate patterns.

Discovering keys to explain social policies within the social and democratic rule-of-law sate

There is a collective worldview on social policies that is expressed and understood by university professionals. However, it takes students time to construct this knowledge. Here, we provide fundamental ideas and a dynamic to facilitate learning of social policies. The preparation of a brief dictionary of significant terms is to be constructed as a group, alongside the maieutic work to be carried out by the teacher. The goal is to discover keys to understand the meaning of social policies and the underlying values that sustain a social and democratic rule-of-law state such as the one proposed in the Spanish Constitution of 1978. Attention is focused on the structure of the mixed welfare state. This is an integral proposal and comprises three dimensions. First, it considers the state and its possible welfare agents: business, market, the Church and civil society. The attitudes with which universal and inclusive social action is promoted, breaking radically with the aid-based meaning contained in other systems, are then addressed. Finally, we examine human dignity as a principle and aim of intervention, a basis for understanding other concepts such as human, social, labour and political rights. It is to be hoped that these pages prove useful for both teaching staff and students.