RESUMENEvaluamos la diversidad, composición y estructura de Myristicaceae ≥ 10 cm de DAP (Diámetro a la Altura del Pecho, a 1.3 m del suelo) en 100 parcelas rectangulares, 76 de 50 x 20 y 24 de 50 x 10 m (8.8 ha en total) en la Amazonía peruana (departamentos de Loreto, Huánuco, Junín, Madre de Dios, Ucayali, Ayacucho, Cusco y Junín). Reportamos 390 árboles ≥ 10 cm de DAP, correspondiendo a 44 especies y 5 géneros. La diversidad alfa varió de 0 a 14.49 de acuerdo a αFisher, de 0 a 1.972 de acuerdo a Shannon H y de 0 a 0.843 de acuerdo a Simpson 1-D. La diversidad beta fue baja con menos del 25% de similitud florística entre las parcelas. En cuanto a la riqueza de especies tenemos: Virola: 23 especies (52.3%), Iryanthera: 16 especies (36.4%). Las especies que incluyen la mayor cantidad de individuos son: Virola pavonis, Iryanthera laevis, Otoba glycycarpa, Virola calophylla y Otoba parvifolia; las cuales incluyeron el 52 % del total de individuos. Los géneros que presentaron la mayor cantidad de individuos fueron: Virola e Iryanthera alcanzando el 82% del total de individuos. La mayor riqueza y abundancia de especies la reportamos en el norte y centro de la -1 Amazonía peruana. El promedio de tallos fue de 44.3 ind. ha . Solamente 66 parcelas presentaron ≥ 1 individuo de Myristicaceae, alcanzando 6.1 ha (69.3%), con densidades de 1 a 6 individuos en parcelas de 0.05 ha y de 1 a 23 en parcelas de 0.1 ha. La diversidad, composición y estructura de Myristicaceae fue variable en la Amazonía peruana.PALABRAS CLAVE: Myristicaceae, Virola, Iryanthera, Compsoneura, Osteophloeum, Otoba, Composición, Diversidad. INVENTORY OF "CUMALAS" (MYRISTICACEAE) IN THE PERUVIAN AMAZON ABSTRACTWe evaluated the diversity, composition and structure within Myristicaceae ≥ 10 cm DBH (diameter at 1.3 m above the ground) in 100 rectangular plots, 76 of 50 x 20 and 24 of 50 x 10 m (8.8 ha in total) in the Peruvian Amazon (departments of Loreto, Huanuco, Junin, Madre de Dios, Ucayali, Ayacucho, Cusco and Junín). We reported 390 trees ≥ 10 cm DBH, corresponding to 44 species and 5 genera. Alpha diversity varied from 0 to 14.49 according to αFisher, from 0 to 1.972 according to Shannon H and from 0 to 0.843 according to Simpson 1-D. Beta diversity was low with less than 25% of floristic similarity between plots. In terms of species richness, we have Virola: 23 species (52.3%), Iryanthera: 16 species (36.4%). The species that include more individuals were: Virola pavonis, Iryanthera laevis, Otoba glycycarpa, Virola calophylla and Otoba parvifolia, which include 52% of all individuals. The genera that had the highest number of individuals were: Virola and Iryanthera reaching a 82% of all individuals. The greatest richness and abundance of the species were reported at the north and center of the peruvian Amazon. Stems average was 44.3 ind stems ha-1. Only 66 plots showed at least one individual of Myristicaceae , reaching 6.1 ha (69.3%), at densities of 1 to 6 individuals in 0.05 ha plots and 1 to 23 in 0.1 ha plots. Diversity, composition and stru...
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