Local and Regional Variation in Local Frequency of Multiple Coffee Pests Across a Mosaic Landscape in Coffea arabica's Native Range
2014 (English)In: Biotropica, ISSN 0006-3606, E-ISSN 1744-7429, Vol. 46, no 3, 276-284 p.Article in journal (Refereed) Published
Shaded coffee has been highlighted for its potential to conserve biodiversity, and thus perhaps also a diversity of natural enemies that could control pest organisms. In southwestern Ethiopia, coffee is grown in shade both in contiguous forests and in forest patches with native trees surrounded by open fields. We hypothesized that coffee grown in contiguous forests, which is the natural habitat for coffee (Coffea arabica) and its interacting organisms, would have less pest damage due to high protection by natural enemies. We surveyed pests on coffee plants in plots within contiguous forests (10 sites) and in forest patches (21 sites). In general, the variation in number of damaged or attacked leaves by individual insect or fungal pests was larger between plants than between plots, which suggests that very local conditions or processes are important. The spatial signals were generally weak. Coffee rust and coffee blotch miner tended to have lower infestation rates in accordance with our hypothesis, while fruit flies in ripe berries were more abundant in forest patches closer to contiguous forest. Based on interviews, olive baboons showed a clear dependency on contiguous forest habitat and were regarded as a problem only in contiguous forests and forest patches close to contiguous forests. In conclusion, we found no support for a generally stronger top-down control on coffee pests in sites within, or with connectivity to, contiguous moist afromontane forests in the native range of coffee.
Place, publisher, year, edition, pages
2014. Vol. 46, no 3, 276-284 p.
Hemileia vastatrix, isolation gradient, Ethiopia, coffee, moist afromontane forests, landscape ecology, patch size
Ecology Environmental Sciences
Research subject Plant Ecology
IdentifiersURN: urn:nbn:se:su:diva-105220DOI: 10.1111/btp.12106ISI: 000335784700005OAI: oai:DiVA.org:su-105220DiVA: diva2:732140
FunderScience for Life Laboratory - a national resource center for high-throughput molecular bioscienceSwedish Research Council Formas