The scientific research on ecosystem services: A bibliometric analysis

The scientific research on ecosystem services (ES) has grown substantially over the past ten years, making more evident the vital role played by natural ecosystems in support of human economy and well-being. Several studies showed that biodiversity represents a fundamental part of the Earth's life support system. Biodiversity considerably affects ecosystem functioning while contributing to the provision of different types of ES. The increasing ecological awareness of scientists, citizens, and policy makers on the importance of natural capital stocks and ES flows boosted nature conservation strategies and the development of more environmentally friendly production processes. In this study, we explored the global scientific literature on ES over the last thirty years. The software VOSviewer was used to create maps based on network data of scientific publications displaying relationships among scientific journals, researchers, and countries. Specific keywords were finally used to explore the co-occurrence of different terms connected to the research on ES. Results show that the Millennium Ecosystem Assessment had a major impact on the scientific literature dealing with the ES concept. The top country researching on ES was USA, while the top journal was Ecological Economics. In terms of co-occurrence, the top keywords were "biodiversity", "management", "conservation", and "climate change". This study identified the main research areas characterizing the scientific literature on ES. Social network analysis and maps based on network data make possible the application of systems thinking in bibliometric science. This type of analysis allows for the investigation of research development in specific fields of science, capturing the interdisciplinarity of research topics crossing the boundary of specific disciplines, as it is the case of ES.