Citizen science contribution in recording the invasive species Hedychium coronarium in the state of São Paulo, Brazil

Resumen

Abstract Citizen science may be a powerful tool in studies on invasive species, warning about early detection of invasions and facilitating the implementation of more efficient containment and management measures. This study adopted a citizen science approach to improve the number of records of the invasive species Hedychium coronarium in São Paulo state, associating public participation with the awareness about biological invasions, also disseminating scientific knowledge. We conducted six workshops in protected areas in São Paulo state to introduce the topic of “biological invasions”, combining theoretical-practical concepts and the training of people without specific scientific background. These workshops targeted managers, staff protected areas, school teachers and local residents. After the workshops, a significant increase in species records (from 54 to 212, a 407.7% increase) and in the number of registered users (from 45 to 126, a 280% increase) on the iNaturalist platform were observed, compared to previous records. Regarding the observers, the highest participation came from users who did not specify their professional area, followed by professionals related to biological sciences and earth sciences. These data indicate that citizen science can engage a broader audience, attracting people from diverse backgrounds to the recording of invasive species. Since the workshops were held within protected areas, they likely attracted participants with backgrounds or interests in biological sciences. The training provided participants with the opportunity to learn about ecological concepts, research methodologies and scientific principles through practical activities and experiential learning. By engaging in data collection and analysis, participants developed skills in evidence evaluation and gained interest in scientific activities, encouraging others to get involved in mapping the invasive species H. coronarium. This initiative can serve as a pilot for a broader monitoring project of invasive species across different Brazilian biomes, strengthening interaction among scientists, managers, and individuals to combat biological invasions.