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Published on: March 19, 2018
Biodiversity conservation, ecosystem functioning, and economic incentives under cocoa agroforestry intensification
D H B Bisseleua1, A D Missoup, S Vidal
1Georg-August-University Goettingen, Department of Crop Science, Entomological section, Grisebachstr. 6, 37077 Goettingen, Germany. hbissel@gwdg.de
Conservation Biology : the Journal of the Society for Conservation Biology
|September 22, 2009
Summary
Increasing global chocolate demand threatens biodiversity. Traditional shade-grown cocoa systems support higher ant species richness, linked to tree diversity, unlike intensive monocultures. Economic incentives are crucial for sustainable cocoa farming.
Area of Science:
- Agroecology
- Tropical Ecology
- Conservation Biology
Background:
- Global chocolate demand is projected to double by 2050, intensifying pressure on cocoa production.
- Traditional cocoa farming under diverse shade trees supports biodiversity, but shade reduction is a growing trend.
- Ecological and economic trade-offs of different cocoa management systems remain understudied.
Purpose of the Study:
- To investigate the relationship between ant ecology, vegetation structure, ecosystem functions, and economic profitability in Cameroonian cocoa agroforests.
- To assess how different land-use management systems impact ant communities and tree diversity.
- To inform sustainable practices for cocoa production that balance biodiversity conservation and farmer livelihoods.
Main Methods:
- Studied 17 traditional cocoa forest gardens in southern Cameroon, analyzing ant species richness, community composition, and abundance.
- Assessed vegetation structure, including tree species richness and density.
- Calculated an index of profitability based on net annual income per hectare.
Main Results:
- Significant differences in ant species richness and abundance, and tree species richness and density, were observed across land-use management systems.
- Ant species richness was significantly higher in diverse, low-intensity, old cocoa systems compared to intensive, young systems.
- Ant species richness showed a significant positive relationship with tree species richness and density; no clear link was found between profitability and biodiversity.
Conclusions:
- Intensification of cocoa farming, involving shade reduction, negatively impacts ant biodiversity.
- Maintaining diverse shade tree canopies is vital for supporting ant species richness in cocoa agroforests.
- Economic incentives, such as certification for shade-grown cocoa, are needed to promote sustainable practices and discourage biodiversity loss.
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