For the third consecutive year, ANERIS contributed to the City Nature Challenge by participating in its local initiative – BioDiverCiutat 2025. As a part of a friendly competition between cities around the world, the event invited the citizens of the Barcelona Metropolitan Region to explore the biodiversity of their urban environment.

From April 25 to 28, through the collaborative effort of ANERIS, GUARDEN, ECS, MINKE, and the Institut de Ciències del Mar (CSIC), 59 volunteers were involved in over 4300 observations in different parts of Barcelona and its surroundings. 

As a result, a total of 974 species were documented and identified – this includes 65 invasive species, 33 species facing a high risk of extinction, and 12 marine species which were recorded for the first time in this area.  

The collected data is now available on the open-access platform MINKA and can be used in further research and conservation efforts in the region. In addition, the results of the monitoring event were visualised in a poster, published in the ANERIS community in the open-access repository Zenodo. 

Check the poster here.