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    Evolutionary distance explains shade tree selection in agroforestry systems

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    Journal Article (3.842Mb)
    Date
    2020-12
    Author
    Sauvadet, M.
    Asare, R.
    Isaac, M.E.
    Type
    Journal Article
    Review Status
    Peer Review
    Target Audience
    Scientists
    Metadata
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    Abstract/Description
    Enhancing agrobiodiversity offers a suite of functions key to the sustainability of low input agroecosystems. The pairing of shade trees in pan-tropical tree-crop systems represents one of the most common and widespread applications of agroecosystem diversification, yet given the vastly heterogeneous conditions in which shade tree selection is made, generalizable advances in the identification of suitably paired tree-crop and shade tree is essential for performance and adoption. Here, we determine the phylogenetic distance between 78 reported shade tree genera and the dominant tree-crop, Theobroma cacao L (cocoa), across four countries in sub-Sahara Africa. We hypothesize that shade trees classified as desirable will be phylogenetically distant from T. cacao, based on the well-established theory that disparate evolutionary histories confer niche differentiation. Our analyses confirm that shade tree taxa categorized as desirable by farmers and institutions present higher phylogenetic distance with T. cacao than shade trees taxa categorized as undesirable. These results demonstrate that shade tree evolutionary distance to the target crop could be a useful tool to predict a taxon’s a priori suitability in cocoa agroforests, as well as the ability of phylogenetic analyses in prescribing appropriate shade trees in other current and future agroforestry systems.
    https://dx.doi.org/10.1016/j.agee.2020.107125
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/6955
    IITA Authors ORCID
    Richard Asarehttps://orcid.org/0000-0001-6798-7821
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.1016/j.agee.2020.107125
    Research Themes
    Natural Resource Management
    IITA Subjects
    Aflatoxin; Agronomy; Cocoa; Natural Resource Management
    Agrovoc Terms
    Agrobiodiversity; Agroecosystems; Farmers; Decision Making; Indigenous Knowledge; Phylogeny; Theobroma Cacao
    Regions
    Africa; West Africa
    Countries
    Cameroon; Ghana; Nigeria
    Hubs
    Headquarters and Western Africa Hub
    Journals
    Agriculture, Ecosystems and Environment
    Collections
    • Journal and Journal Articles4835
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