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Shade tree functional traits drive critical ecosystem services in cocoa agroforestry systems
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Date
2024-09-15Author
Addo-Danso, S.D.
Asare, R.
Tettey, A.
Schmidt, J.E.
Sauvadet, M.
Coulis, M.
Belliard, N.
Isaac, M.E.
Type
Review Status
Peer ReviewTarget Audience
Scientists
Metadata
Show full item recordAbstract/Description
The inclusion of shade trees into cocoa (Theobroma cacao L.) systems can generate livelihood opportunities for
smallholder farmers. Yet, there is the need to examine the ecological context within which shade trees, and their
functional traits, have a positive impact on ecosystem services in cocoa systems. Here, we used a network of
farms of similar aged hybrid cocoa, in a nested design consisting of agroforestry or monoculture management, on
three initial soil quality levels (poor, moderate or good) in two agroecological zones (humid or sub-humid) to
investigate whether shade tree functional traits are linked with soil-based and cocoa-based ecosystem services.
Initial soil quality level was the main driver of differences in soil organic matter, soil N, soil C:N, soil total C, soil
permanganate-oxidizable C, while agroecological zone largely explained differences in cocoa yield and aboveground
C. The inclusion of shade trees increased soil macrofauna abundance and mass but decreased cocoa
aboveground C compared to cocoa monoculture plots. Importantly, within agroforestry systems, shade tree leaf
traits expressed as community weighted means of SLA, leaf N, and leaf dry matter content explained differences
in soil-based and cocoa-based ecosystem services. These results show that agroforestry systems have the potential
to enhance soil-based ecosystem services without notably decreasing cocoa yield. And a trait-based approach to
describe shade tree diversity can advance our understanding and management of shade tree-ecosystem service
relationships in cocoa agroforestry systems.
https://doi.org/10.1016/j.agee.2024.109090
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Permanent link to this item
https://hdl.handle.net/20.500.12478/8602IITA Authors ORCID
Richard Asarehttps://orcid.org/0000-0001-6798-7821
Digital Object Identifier (DOI)
https://doi.org/10.1016/j.agee.2024.109090