www.iwmi.org
A water-secure world
Linking soil biodiversity, water regulation and agricultural
production: a conceptual fr...
www.iwmi.org
A water-secure world
Outline of the talk
 Motivation
 Problem
 Result
 Policy recommendations and Conclus...
www.iwmi.org
A water-secure world
Motivation
Water management
Increase Agricultural production
Reduce productive Risks
Con...
www.iwmi.org
A water-secure world
Motivation
Management of water through large infrastructures:
Dams, Canals, Pumping stat...
www.iwmi.org
A water-secure world
Motivation
Idea: look into alternative sustainable and resilient
solutions
These alterna...
www.iwmi.org
A water-secure world
Problem
Is it possible to conceptually show the role and value of soil
biodiversity (th...
www.iwmi.org
A water-secure world
Problem
Climate Soil Biodiversity Production Economy
www.iwmi.org
A water-secure world
Problem
Biodiversity rich soil
Biodiversity poor soil
www.iwmi.org
A water-secure world
Problem
The model
Economics
Climate Bio-Soil Water Crop
Assumption Variable rainfall Bio...
www.iwmi.org
A water-secure world
Results
What is the impact of soil biodiversity on average
production ? (productive valu...
www.iwmi.org
A water-secure world
Results
What is the impact of soil biodiversity on average
production ? (productive valu...
www.iwmi.org
A water-secure world
Results
What is the impact of soil biodiversity on average
production ? (productive valu...
www.iwmi.org
A water-secure world
Results
What is the impact of soil biodiversity on production
variance ? (insurance valu...
www.iwmi.org
A water-secure world
Results
What is the impact of soil biodiversity on production
variance ? (insurance valu...
www.iwmi.org
A water-secure world
Results
What is the impact of soil biodiversity on production
variance ? (insurance valu...
www.iwmi.org
A water-secure world
Results
What is the optimal biodiversity decision of a rational
farmer?
 Farmers growin...
www.iwmi.org
A water-secure world
Results
What is the effect of climate change on biodiversity
conservation strategy?
0
5
...
www.iwmi.org
A water-secure world
Policy recommendations and Conclusions
 Promote on land soil management (through biodiv...
www.iwmi.org
A water-secure world
Thank you for your attention
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Linking soil biodiversity, water regulation and agricultural

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Yoro Sidibe from the International Water Management Institute, Ghana talks about

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Linking soil biodiversity, water regulation and agricultural

  1. 1. www.iwmi.org A water-secure world Linking soil biodiversity, water regulation and agricultural production: a conceptual framework Yoro Sidibe International Water Management Institute Sebastien Foudi (BC3), Unai Pascual (BC3), Mette Termansen (Aarhus University)
  2. 2. www.iwmi.org A water-secure world Outline of the talk  Motivation  Problem  Result  Policy recommendations and Conclusions
  3. 3. www.iwmi.org A water-secure world Motivation Water management Increase Agricultural production Reduce productive Risks Construct a more resilient agricultural system. Resilience viewed “as the capacity to absorb extreme events”.  Alleviate poverty  Increase agricultural income  Improve food security
  4. 4. www.iwmi.org A water-secure world Motivation Management of water through large infrastructures: Dams, Canals, Pumping stations, Etc. Very often failure because of - High costs - Managerial difficulties - No control of smallholder farmers - Environmental impacts
  5. 5. www.iwmi.org A water-secure world Motivation Idea: look into alternative sustainable and resilient solutions These alternatives solutions do not need to conflict with large scale infrastructures but complement and optimize their use. EcoFinder project + Africa RISING project : What role can soil biodiversity play in agricultural production? What soil biodiversity conservation strategy in a changing climate?
  6. 6. www.iwmi.org A water-secure world Problem Is it possible to conceptually show the role and value of soil biodiversity (through soil water regulation)? What value does soil biodiversity have (production and insurance) ? How to adaptively use soil biodiversity to climate change? Questions answered with a simple modeling approach
  7. 7. www.iwmi.org A water-secure world Problem Climate Soil Biodiversity Production Economy
  8. 8. www.iwmi.org A water-secure world Problem Biodiversity rich soil Biodiversity poor soil
  9. 9. www.iwmi.org A water-secure world Problem The model Economics Climate Bio-Soil Water Crop Assumption Variable rainfall Biodiversity shape soil Water dynamics depends on soil Production depend on water Model Economic Assumption Rational farmer ( Risk averse) Economic Model
  10. 10. www.iwmi.org A water-secure world Results What is the impact of soil biodiversity on average production ? (productive value) 0 1 2 3 4 5 6 7 8 0 2 4 6 8 10 Averageproduction Soil Biodiversity Production Production
  11. 11. www.iwmi.org A water-secure world Results What is the impact of soil biodiversity on average production ? (productive value) 0 1 2 3 4 5 6 7 8 0 2 4 6 8 10 Averageproduction Soil Biodiversity Production Production
  12. 12. www.iwmi.org A water-secure world Results What is the impact of soil biodiversity on average production ? (productive value)  Soil biodiversity has a production value  For areas with poor soil, a small increase in soil biodiversity can result in large increases in agricultural production
  13. 13. www.iwmi.org A water-secure world Results What is the impact of soil biodiversity on production variance ? (insurance value)
  14. 14. www.iwmi.org A water-secure world Results What is the impact of soil biodiversity on production variance ? (insurance value)
  15. 15. www.iwmi.org A water-secure world Results What is the impact of soil biodiversity on production variance ? (insurance value)  Soil biodiversity has a an insurance value up to a certain level.  For areas with poor soil, a small increase in soil biodiversity can result in large decreases in agricultural production variability. Soil biodiversity can be important in protecting against risks in areas with poor agricultural insurance services.
  16. 16. www.iwmi.org A water-secure world Results What is the optimal biodiversity decision of a rational farmer?  Farmers growing crops with high water productivity are more likely to rely on soil biodiversity for its productive use.  Farmers growing crops with low water productivity are more likely to rely on soil biodiversity for its productive and insurance use. Solution
  17. 17. www.iwmi.org A water-secure world Results What is the effect of climate change on biodiversity conservation strategy? 0 5 10 15 20 25 30 35 40 45 50 0 0.2 0.4 0.6 0.8 1 SoilBiodiversity Drought frequency λ=0 λ=0,01 λ=0,03 λ=0,05
  18. 18. www.iwmi.org A water-secure world Policy recommendations and Conclusions  Promote on land soil management (through biodiversity) as a significant alternative way to manage water.  Promote soil biodiversity management as risk management tool in areas with poor insurance services.  Modulate the intervention strategies according to exogenous factors (climate, soil, risk aversion) etc.  Empirical investigation is still to be done to provide quantitative recommendations beyond the qualitative results presented here.
  19. 19. www.iwmi.org A water-secure world Thank you for your attention

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