Making biodiversity-friendly cocoa pay: combining yield, certification, and REDD for shade management.

Area of Science:

• Tropical Ecology
• Sustainable Agriculture
• Conservation Biology

Background:

• Traditional agroforestry is vital for biodiversity and poverty reduction in the tropics.
• This system is declining due to economic precarity and perceived negative impacts of shade trees on crop yields.

Purpose of the Study:

• To re-evaluate agroforestry shade metrics for optimizing yield and biodiversity.
• To investigate methods for increasing the economic viability of traditional agroforestry systems.

Main Methods:

• Simultaneous optimization of canopy cover and neighboring tree density as shade metrics.
• Modeling yield potential under different shade management strategies.
• Designing a sustainable certification scheme for cocoa-based products.

Main Results:

• A yield increase of over 50% is achievable with approximately 100 shade trees/hectare, spatially organized.
• Optimizing for both canopy cover and neighboring tree density reveals higher yield potential than canopy cover alone.
• Even significant yield increases may not be enough to prevent conversion away from agroforestry.

Conclusions:

• Spatially optimized shade trees offer a win-win for biodiversity and smallholder farmers.
• Integrating yield improvements with eco-certification and REDD+ programs can incentivize sustainable agroforestry.
• This integrated approach has the potential to enhance livelihoods and conserve biodiversity simultaneously.