At present, my principal interest is to understand the biotic control of ecosystem functioning and the negative impact of human activity on natural processes. Human activities such as harvesting, pollution, introduction of invasive species and, more recently, the impacts of climate change, can result in changes in the balance of natural processes (top-down and bottom-up). My work on rocky intertidal communities over the subtropical coast of Brazil addresses the relative importance of bottom-up (primary productivity, SST, organic matter, recruitment rates) and top-down control (diversity, abundance and size of consumers) in order to describe natural processes in this subtropical system and differences from temperate areas. We have been combining laboratory and field experimentation in an ecological model to determine how lateral modifiers (wave exposure, freshwater input, mangrove cover, coastline complexity), human impact (demography, contaminants in water, invasive species) as well as the impact of extreme environmental events (air temperature, humidity, rainfall) alter the balance of natural processes. Recently, I have been working on the strength link between science and policy makers, in order to facilitate the communication among stakeholders and the application of scientific knowledge to practice and conservation.