When fully implemented, the CNUC could be an important source of information for evaluating effectiveness of protected areas (Prates and Sousa, 2014). Most protected areas, however, do not systematically conduct such monitoring. More than half the managers of Amazonian extractive reserves and sustainable development reserves have reported that they lack the tools to monitor the results of social and environmental development activities. It has monitored coral reefs in marine protected areas since 2002.