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When thousands of citizens monitor common species: the French Garden Biodiversity Observatory

When thousands of citizens monitor common species: the French Garden Biodiversity Observatory. Benoît Fontaine and Romain Julliard Muséum national d’Histoire naturelle, Paris, France 12th EEF, Avila 27 September 2011. The Observatoire des Papillons des Jardins.

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When thousands of citizens monitor common species: the French Garden Biodiversity Observatory

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  1. When thousands of citizens monitor common species: the French Garden Biodiversity Observatory Benoît Fontaine and Romain Julliard Muséum national d’Histoire naturelle, Paris, France 12th EEF, Avila 27 September 2011

  2. The Observatoire des Papillons des Jardins A program run by MNHN (protocol, analyses) and Noé Conservation (animation) • General public • 28 common species/species groups • Private or public gardens • A research project: • Impact of gardening practices, garden types and landscape on common species • Long-term biodiversity monitoring Launched in 2006

  3. Frequency of visits Monthly data (March-October): maximum number of butterflies of each species seen simultaneously in the garden. Frequency of observation is up to the observer

  4. Landscape impact Commune (~county) Surroundings Distance to closest wood/field/pasture

  5. Trees Flowers Garden features Garden and gardening practices impact

  6. Six years later… Between 2,700 and 4,000 gardens monitored each year Ca. 100,000 monthly surveys, two million abundance data collected since 2006

  7. Impact of urbanization Average monthly abundance Urbanization classes

  8. Impact of garden characteristics Garden naturalness Nectar offer

  9. Cross-scale interactions: landscape impact vs. garden impact Urban avoiding species are more sensitive to garden practices than urban tolerant ones

  10. One-shot operations « Fleurs à papillons » project Butterfly and plant identification Pictures of butterflies feeding

  11. 4500 pictures • 35 butterfly species • ~300 plant species

  12. Some butterflies species favour exotic plant species Hypothesis : these butterflies should be abundant in cities Sensivity to urbanization Exotic flower preference index Food availability is not the limiting factor for the presence of butterflies in cities

  13. The half-full glass: a large pool of dedicated observers The half-empty glass More than 2000 long-term participants

  14. Most participants do not stay on the long run Number of gardens Number of surveys provided

  15. New observers are less motivated than those from 2006 Active vs. non active gardens per registration year

  16. New observers are less motivated than those from 2006 Monthly survey results sent (year of registration)

  17. Less and less new observers each year New observers 2006 2007 2008 2009 2010 2011

  18. Cumulative number of gardens having provided at least one monthly survey Are there only 10,000 potential observers in France?

  19. The challenge: • Attracting new observers • Keeping current observers

  20. Thank you for your attention

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