Heritage and participatory governance: An analysis of political strategies and social fractures in Spain

In the heritage field, institutions tend to see social participation as a synonym for good governance practice. This extends to other areas such as the environment, humanitarian aid, and sustainable development. In this article, the authors analyze the use of participatory models in the management of heritage through the study of three heritage sites in Spain: the prehistoric paintings in Altamira, the Mosque‐Cathedral in Córdoba, and the Cabo de Gata‐Nijar Natural Park. Their study suggests that, despite the promises of more democratic heritage governance, participatory methods are commonly bounded by social fractures that are concomitant to certain ‘heritage regimes’. They conclude that the critical study of participation in heritage should go beyond the dichotomy between ‘good and bad’ participation. Rather, it should focus on understanding what participation does to the entire heritagization process.     

Ecydsial efficiency and evolutionary efficacy among marine arthropods: implications for trilobite survivorship

A comparison of ecdysial patterns between trilobites and other macrobenthic marine arthropods (crabs, shrimp, lobsters, horseshoe crabs) reveals differences that may have evolutionary consequences. Limulus and many malacostracans apparently have a signature ecdysial style; conversely, a range of moult configurations characterized trilobite ecdysis, and this variation is evident even within individual species. A canalised ecdysial habit may be safer or metabolically more efficient and therefore, summed over the history of the class, evolutionarily advantageous. Some trilobite clades show evolutionary trends toward morphologies that would have facilitated ecdysis (e.g. reduction in the number of thoracic segments, reduction in the number and prominence of spines), but co-adaptation or multiple-use effects complicate the evolutionary signal of ecdysial selection. Survivorship analysis supports a possible link between ecdysial habit and evolutionary success: genera with fewer thoracic segments (= easier ecydsis) are longer-lived. The increased predation pressure on trilobites through the Palaeozoic would have amplified the evolutionary impact of an inefficient moult habit. The cumulative effects of a less-than-optimal ecdysial habit, and a physiology that apparently required reconstituting a calcitic exoskeleton de novo with each moult, are compelling biotic factors to consider in examining functional interpretations, life histories, evolutionary trends, and ultimate disposition of the Trilobita.