Predicting responses of geo-ecological carbonate reef systems to climate change: A conceptual model and review

Coral reefs provide critical ecological and geomorphic (e.g. sediment production for reef-fronted shoreline maintenance) services, which interact in complex and dynamic ways. These services are under threat from climate change, requiring dynamic modelling approaches that predict how reef systems will respond to different future climate scenarios. Carbonate budgets, which estimate net reef calcium carbonate production, provide a comprehensive 'snap-shot' assessment of reef accretionary potential and reef stability. These budgets, however, were not intended to account for the full suite of processes that maintain coral reef services or to provide predictive capacity on longer timescales (decadal to centennial). To respond to the dual challenges of enhancing carbonate budget assessments and advancing their predictive capacity, we applied a novel model elicitation and review method to create a qualitative geo-ecological carbonate reef system model that links geomorphic, ecological and physical processes. Our approach conceptualizes relationships between net carbonate production, sediment transport and landform stability, and rates knowledge confidence to reveal major knowledge gaps and critical future research pathways. The model provides a blueprint for future coral reef research that aims to quantify net carbonate production and sediment dynamics, improving our capacity to predict responses of reefs and reef-fronted shorelines to future climate change

Community broadcasting and the enclosure of the public sphere

One of the normative tenets of the Habermasian public sphere is that it should be an open and universally accessible forum. In Australia, one way of achieving this is the provision for community broadcasting in the Broadcasting Services Act. A closer examination of community broadcasting, however, suggests practices that contradict the idea of an open and accessible public sphere. Community broadcasting organizations regulate access to their media assets through a combination of formal and informal structures. This suggests that the public sphere can be understood as a resource, and that community broadcasting organizations can be analysed as ‘commons regimes’. This approach reveals a fundamental paradox inherent in the public sphere: access, participation and the quality of discourse in the public sphere are connected to its enclosure, which limits membership and participation through a system of rules and norms that govern the conduct of a group. By accepting the view that a public sphere is governed by property rights, it follows that an open and universally accessible public sphere is neither possible nor desirable

Democratic performance of parties and legitimacy in Europe

This article analyses the development of legitimacy across 20 European democracies (1990-2010). The claim is that the democratic performance of parties affects levels of legitimacy. A conceptual and empirical discussion is presented to establish this relationship. Democratic performance is characterised by trusting parties to be responsive to the electorate and responsible in government. Legitimacy is defined as a composite measure representing satisfaction with parties, compliance with the rule of law as well as voter turnout and willingness to protest. The responsiveness of parties appears less representative on public concerns and governmental responsibility appears closer to party interests than to the general interest. Hence, a 'democratic deficit' seems to have emerged across Europe, manifested by more electoral volatility, new parties and alternation in government and lower survival rates of governments. This negatively affects trust in parties, parliament and government efficacy. Hence, party behaviour has not strongly contributed to political legitimacy since the 1990s. © 2014 © 2014 Taylor & Francis