Managing ecosystems for multiple ecosystem services and balancing the well-being of diverse stakeholders involves different kinds of trade-offs. Often trade-offs involve noneconomic and difficult-to-evaluate values, such as cultural identity, employment, the well-being of poor people, or particular species or ecosystem structures. Although trade-offs need to be considered for successful environmental management, they are often overlooked in favor of win-wins. Management and policy decisions demand approaches that can explicitly acknowledge and evaluate diverse trade-offs. We identified a diversity of apparent trade-offs in a small-scale tropical fishery when ecological simulations were integrated with participatory assessments of social-ecological system structure and stakeholders' well-being. Despite an apparent win-win between conservation and profitability at the aggregate scale, food production, employment, and well-being of marginalized stakeholders were differentially influenced by management decisions leading to trade-offs. Some of these trade-offs were suggested to be "taboo" trade-offs between morally incommensurable values, such as between profits and the well-being of marginalized women. These were not previously recognized as management issues. Stakeholders explored and deliberated over trade-offs supported by an interactive "toy model" representing key system trade-offs, alongside qualitative narrative scenarios of the future. The concept of taboo trade-offs suggests that psychological bias and social sensitivity may exclude key issues from decision making, which can result in policies that are difficult to implement. Our participatory modeling and scenarios approach has the potential to increase awareness of such trade-offs, promote discussion of what is acceptable, and potentially identify and reduce obstacles to management compliance.

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Recent temperature histories and benthic surveys of Madagascar's coral reefs are presented from 3 disparate regions in order to develop an understanding of the relationship between sea surface temperature (SST) and benthic cover, coral diversity, and community structure. Results indicate the presence of distinct temperature zones influenced by windward and seaward positions, latitude, intra-and inter-annual cycles, and local hydrodynamics. Southwest reefs had SSTs with the lowest mean, highest variation, fastest rise, strongest periodicities and highest cumulative degree heating weeks during recent warm events. These reefs were distinguished by a low number of coral taxa and a high cover of erect algae and had recently undergone a major decline in coral cover and change in community structure. Northwestern and eastern reefs had SSTs with moderate means and variation, lower temperature rises, and weaker periodicities. They also had higher coral cover and numbers of coral genera, and communities more typical of Indian Ocean coral communities undisturbed by temperature anomalies. Northwestern reefs had the lowest cumulative degree heating weeks and a high frequency of rare 'boutique' taxa that are usually found deeper or in lowdisturbance environments. Eastern reefs had a developed reef structure and may have the greatest potential for surviving climate change, while the northwest may be more amenable to protecting rare taxa. The more temperate reefs of the south showed large-scale degradation and no evidence for a refuge for coral communities, and require increased herbivory and associated fisheries management to reduce erect algal abundance.

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