Reefs at Risk Revisited is a high-resolution update of the original global analysis, Reefs at Risk: A Map-Based Indicator of Threats to the World’s Coral Reefs. Reefs at Risk Revisited uses a global map of coral reefs at 500-m resolution, which is 64 times more detailed than the 4-km resolution map used in the 1998 analysis, and benefits from improvements in many global data sets used to evaluate threats to reefs (most threat data are at 1 km resolution, which is 16 times more detailed than those used in the 1998 analysis).
This report is a result of a field work - it took an environmental and physical approach of the situation of Kiribati with the objectives to better understand the formation and recent evolution of sedimentary coasts, in particular tropical islands (Indian Ocean and Caribbean Sea archipelagos) and to analyze interrelations between physical processes and human development to determine the nature and extent of anthropogenic impacts, particularly in coral reef environments as well as to evaluate the exposure of islands to coastal hazards related to climate and climate change.
This study first presents the general knowledge on shark exploitation and vulnerability. Then, the status of coastal shark fisheries in the Pacific Islands is addressed from the angle of the data available for this region and on the basis of information collected through a questionnaire that was sent to the fisheries department of the Pacific countries. In the last part, prospects for management and regulation are discussed.
"Comparison of the average hard coral cover between the three five-year periods comprising the last 15 years (2005-09, 2010-14, 2015-19, Tab. 9.3) indicated that there was a high degree of confidence (93%) in the long-term decline, despite the uncertainty in individual yearly estimates. Further, the vast majority (90%) of this decline occurred between 2010-14 and 2015-19, suggesting that the rate of decline in hard coral cover has accelerated during the last five years"
Effective conservation requires rigorous baselines of pristine conditions to assess the impacts of human activities and to valuate the efficacy of management. The study found that top predators and reef-building organisms dominated unpopulated Kingman and Palmyra, while small planktivorous fishes and fleshy algae dominated the populated atolls of Tabuaeran and Kiritimati.
Dataset that provides a direct internet link and resources pertaining to the CBD Global Coral Portal - a window to various sources of information on the status of coral reefs and the range of commitments, initiatives, and actions at different scales to protect and sustainably manage coral reefs and closely associated ecosystems in support of the achievement of the Aichi Biodiversity Targets and the Sustainable Development Goals.