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Climate change-- our approach: The science of climate change : scale of the environment challenge ; Economics, ethics and climate change ; Ethical frameworks and intertemporal equity -- Impacts of climate change on growth and development: How climate change will affect people around the world ; Implications of climate change for development ; Costs of climate change in developed countries ; Economic modelling of climate-change impacts -- The economics of stabilisation: Projecting the growth of greenhouse-gas emissions ; Climate change and the Kuznets curve ; The challenge of stabilisation ; Identifying the costs of mitigation ; Macroeconomic models of costs ; Structural change and competitiveness ; Key statistics for 123 UK production sectors ; Opportunities and wider benefits from climate policies ; Towards a goal for climate-change policy -- Policy responses for mitigation: Harnessing markets for mitigation : the role of taxation and trading ; Carbon pricing and emission markets in practice ; Accelerating technological innovation ; Beyond carbon markets and technology -- Policy responses for adaptation: Understanding the economics of adaptation ; Adaptation in the developed world ; Adaptation in the developing world -- International collective action: Framework for understanding international collective action for climate change -- Creating a global price for carbon -- Supporting the transition to a low-carbon global economy -- Promoting effective international technology co-operation -- Reversing emissions from land use change -- International support for adaptation -- Conclusions : building and sustaining international co-operation on climate change.

The Review first examines the evidence on the economic impacts of climate change itself, and explores the economics of stabilising greenhouse gases in the atmosphere. The second half of the Review considers the complex policy challenges involved in managing the transition to a low-carbon economy and in ensuring that societies can adapt to the consequences of climate change that can no longer be avoided.

Microbenthos and macrobenthos were quantitatively studied at 62 stations distributed regularly over the Uvea Atoll lagoon (850 km2). Sampling was performed using both SCUBA and a 0.1 m2 Smith Mclntyre grab. Mean estimates of ATP, chlorophyll a and phaeopigments were 297.3ng/cm2, 77.01 mg/m2 and 35.28 mg/m2 respectively. The mean macrobenthic biomass was 4.14 gAFDW/m2 of which the macrophytobenthos accounts for 39%. The benthic biomass decreased from the coast to the deepest parts of the lagoon. Macrophytes were most abundant in the coastal area and became progressively scarcer with increasing depth. By comparison, sessile species dominated on hard substrates in intermediate and deep zones. The abundance of the surface-deposit feeder group, that dominated the trophic structure of zoobenthos (33% of the macrofauna biomass), could be explained by a microphytic biomass six times higher than macrophytobenthic one in terms of carbon. Carnivores (32%) were mainly represented by necrophagous species, and filter-feeders (27%) by bivalves. Herbivores were rare. Four main benthic communities were identified on the basis of their macrobenthic assemblages using a Detrended Correspondence analysis. They corresponded to (1) a coastal zone, with the highest mud percentage in sediments, (2) an intermediate zone, with moderate depth and dominated by hard substrates, (3) a back reef zone, with thick sand layers, and (4) a deep zone dominated by hard substrates. Relative distribution of the trophic groups varied according to the different zones and suggests distinct functional characteristics for the different benthic assemblages. From a biogeographic point of view, this study highlighted the richness of the Uvea Atoll lagoon in terms of benthic species and biomass, compared to other central Pacific atoll lagoons.