Does landscape heterogeneity modifythe trade-off between production and             biodiversity?          Rodolphe Sabati...
Stating the problem Explaining ‘Landscape Heterogeneity’                        compositionnal heterogeneity + + +        ...
Stating the problem‘Biodiversity needs Benton 2003   heterogeneity’   Tscharntke 2005                      Fahrig 2011    ...
Stating the problem To what extent can biodiversity be enhanced by increasing landscape heterogeneity?               biodi...
Case study – A grassland landscape (5000   ha) with 50 beef cattle farms
Case study – A grassland landscape (5000   ha) with 50 beef cattle farms – Bird sp. which life cycle is   deeply linked to...
Sabatier 2010Spatially explicit dynamic model                                    Teillard 2010            50%          25%...
Relative effect of composition and structure                                                            Sabatier 2010 bird...
Relative effect of composition and structure                                                                              ...
Relative effect of composition and structure                                                                              ...
Heterogeneity leverages the trade-off (in biodiversity)                                                                   ...
Heterogeneity leverages the trade-off (in production)                                                                     ...
Conclusion • Heterogeneity leverages the tradeoff • The positive effect of heterogeneity derives from   complementarities ...
Future challenges    From possiblelandscapes to feasible     landscapes                           Co-design of feasible   ...
Thank you for your attentionFundings 2009-2012FarmBird project« Coviability models of FARMing and BIRD biodiversity »   mu...
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Does landscape heterogeneity modify the trade-off between production and biodiversity? Muriel Tichit

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Does landscape heterogeneity modify the trade-off between production and biodiversity? Muriel Tichit

  1. 1. Does landscape heterogeneity modifythe trade-off between production and biodiversity? Rodolphe Sabatier & Muriel Tichit INRA SAD – Sciences for Action and Development Division, PARIS DIET AGRICULTURE ENVIRONMENT
  2. 2. Stating the problem Explaining ‘Landscape Heterogeneity’ compositionnal heterogeneity + + + after Fahrig 2011 200 m 200 m structural heterogeneity + + +
  3. 3. Stating the problem‘Biodiversity needs Benton 2003 heterogeneity’ Tscharntke 2005 Fahrig 2011 = qualitative reviews  need for quantificationsLandscape simplification – mechanization and field enlargement – use of chemical inputs in large areas – loss of semi natural elements – …
  4. 4. Stating the problem To what extent can biodiversity be enhanced by increasing landscape heterogeneity? biodiversity production
  5. 5. Case study – A grassland landscape (5000 ha) with 50 beef cattle farms
  6. 6. Case study – A grassland landscape (5000 ha) with 50 beef cattle farms – Bird sp. which life cycle is deeply linked to management practices fecundity survival
  7. 7. Sabatier 2010Spatially explicit dynamic model Teillard 2010 50% 25% 25% Farm Field Landscape mowing heavy (productive) grazing light (ecological) grazing
  8. 8. Relative effect of composition and structure Sabatier 2010 bird population size Bird growth rate herbage production (LU.days.ha-1)
  9. 9. Relative effect of composition and structure Sabatier 2010 Composition bird population size Bird growth rate herbage production (LU.days.ha-1) mowing (39%) heavy (productive) grazing light (ecological) grazing
  10. 10. Relative effect of composition and structure Sabatier 2010 Composition Structure bird population size bird population size Bird growth rate herbage production (LU.days.ha-1) landscape structure mowing 39% heavy (productive) grazing light (ecological) grazing
  11. 11. Heterogeneity leverages the trade-off (in biodiversity) Sabatier 2010 bird population size herbage production (LU.days.ha-1) mowing 39% heavy (productive) grazing light (ecological) grazing
  12. 12. Heterogeneity leverages the trade-off (in production) Sabatier 2010 bird population size herbage production (LU.days.ha-1) mowing heavy (productive) grazing light (ecological) grazing
  13. 13. Conclusion • Heterogeneity leverages the tradeoff • The positive effect of heterogeneity derives from complementarities between management regimes • Heterogeneity more important for mobile species • Modifying landscape heterogeneity requires coordination between farmers
  14. 14. Future challenges From possiblelandscapes to feasible landscapes Co-design of feasible landscapes with farmers and other stakeholders
  15. 15. Thank you for your attentionFundings 2009-2012FarmBird project« Coviability models of FARMing and BIRD biodiversity » muriel.tichit@agroparistech.fr
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