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New ponds boost plant diversity: Water Friendly Farming results presented in Portugal
3rd October 2025An international group of plant scientists heard how clean water ponds are boosting biodiversity at the Water Friendly Farming demonstration site.
Freshwater Habitats Trust Plant Ecologist Dr Astrid Biddle presented findings from the long-running project at the International Symposium on Aquatic Plants in Lisbon, Portugal.
The project has been carrying out plant surveys across the three Water Friendly Farming catchments for 14 years. In her presentation, Astrid outlined measures implemented at two of the catchments – including the creation of new clean water ponds – and shared data from annual monitoring.
Astrid highlighted how adding new clean water ponds had increased the number of wetland plant species by 16% and roughly doubled the number of uncommon wetland plant species.
Delegates also heard about the overall loss in plant biodiversity since monitoring work began in 2010.
Astrid shared best practice for creating new clean water ponds for wildlife, including ensuring there were no inflows and positioning ponds in semi-natural catchments. She said: “There was a lot of interest in Water Friendly Farming from the other delegates. They were impressed that the work had such relevant implications for practitioners, so we hope that some of the lessons we’ve learned about the value of clean water ponds can be applied internationally.”
Water Friendly Farming is unique in Europe for providing long-term, catchment-scale data on wetland plant species, offering valuable insights for conservation and land management.
The International Symposium on Aquatic Plants ran from from 15th to 19th September and was organised by the School of Agriculture (Instituto Superior de Agronomia – ISA) and the Forest Research Centre (Centro de Estudos Florestais – CEF. The theme of the 2025 Symposium was ‘Back to the Future of Aquatic Plants and the Way Forward’, covering the relevance of pioneers, innovation and the challenges of the future.
View the results of wetland plant surveys from 2021 to 2024.