摘要
Marine and coastal ecosystems in Africa provide valuable cultural (recreational, spiritual), provisioning (such as food, timber and firewood) and regulatory (such as flood protection and climate regulation) services that are not only at the core of coastal ecosystem functioning, but are also an important basis for the economic livelihoods of over 120 million inhabitants living along the continent's coastal zone. However, these valuable ecosystems are being subjected to a range of human pressures, including overfishing and destructive fishing practices, pollution, including excess nutrients (causing eutrophication), loss and degradation of habitats, physical shoreline changes and disturbance of the hydrological regimes of rivers and estuarine systems, aggravated further by the effects of climate change. The effects of these pressures, often acting in cumulative and synergistic manners, readily affect the overall stability of the coastal ecosystems, threatening their resilience over the short- and long-term. This chapter highlights the challenges faced by the coastal states of Eastern and Western Africa in managing their coastal and marine resources for the sustainable benefits of their populations. Current mechanisms for the governance and management of the coastal and marine environment at national to regional scales are reviewed, and their effectiveness appraised, and recommendations for improved management and scientific support are made.