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    Author(s): Benedicte Bachelot; María Uriarte; Krista L. McGuire; Jill Thompson; Jess Zimmerman
    Date: 2017
    Source: Ecology
    Publication Series: Scientific Journal (JRNL)
    Station: International Institute of Tropical Forestry
    PDF: Download Publication  (233.0 KB)

    Description

    Negative population feedbacks mediated by natural enemies can promote species coexistence at the community scale through disproportionate mortality of numerically dominant (common) tree species. Simultaneously, associations with arbuscular mycorrhizal fungi (AMF) can result in positive effects on tree populations. Coupling data on seedling foliar damage from herbivores and pathogens and DNA sequencing of soil AMF diversity, we assessed the effects of these factors on tree seedling mortality at local (1 m2) and community (16 ha plot) scales in a tropical rainforest in Puerto Rico. At the local scale, AMF diversity in soil counteracted negative effects from foliar damage on seedling mortality. At the community scale, mortality of seedlings of common tree species increased with foliar damage while rare tree species benefited from soil AMF diversity. Together, the effects of foliar damage and soil AMF diversity on seedling mortality might foster tree species coexistence in this forest.

    Publication Notes

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    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Bachelot, Benedicte; Uriarte, María; McGuire, Krista L.; Thompson, Jill; Zimmerman, Jess. 2017.Arbuscular mycorrhizal fungal diversity and natural enemies promote coexistence of tropical tree species. Ecology. 98(3): 712-720. https://doi.org/10.1002/ecy.1683.

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    Keywords

    arbuscular mycorrhizal fungi, coexistence, community compensatory trend, Janzen Connell hypothesis, seedling mortality, tropical forest

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https://www.fs.usda.gov/treesearch/pubs/55394