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Little is known regarding how trophic interactions shape community assembly in tropical forests. Here we assess multi-taxonomic community assembly rules using a rare standardized coordinated inventory comprising exhaustive surveys of five highly-diverse taxonomic groups exerting key ecological functions: trees, fungi, earthworms, ants and spiders. We sampled 36 1.9-ha plots from four remote locations in French Guiana including precise soil measurements, and we tested whether species turnover was coordinated among groups across geographic and edaphic gradients. All species group pairs exhibited significant compositional associations that were independent from soil conditions. For some of the pairs, associations were also partly explained by soil properties, especially soil phosphorus availability. Our study provides evidence for coordinated turnover among taxonomic groups beyond simple relationships with environmental factors, thereby refining our understanding regarding the nature of interactions occurring among these ecologically important groups.
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Vleminckx, Jason; Schimann, Heidy; Decaens, Thibaud; Fichaux, Melanie; Vedel, Vincent; Jaouen, Gaëlle; Roy, Melanie; Lapied, Emmanuel; Engel, Julien; Dourdain, Aurélie; Petronelli, Pascal; Orivel, Jerome; and Baraloto, Christopher, "Coordinated community structure among trees, fungi and invertebrate groups in Amazonian rainforests" (2019). Department of Biological Sciences. 205.
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