Spatial distribution of Bertholletia excelsa in selectively logged forests of the Peruvian Amazon

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dc.creatorRockwell, Cara A.
dc.creatorGuariguata, Manuel R.
dc.creatorMenton, M.
dc.creatorArroyo Quispe, E.
dc.creatorQuaedvlieg, J.
dc.creatorWarren-Thomas, E.
dc.creatorFernández Silva, H.
dc.creatorJurado Rojas, E.E.
dc.creatorKohagura Arrunátegui, J.A.H.
dc.creatorMeza Vega, L.A.
dc.creatorQuenta Hancco, R.
dc.creatorRevilla Vera, O.
dc.creatorValera Tito, J.F.
dc.creatorVillarroel Panduro, B.T.
dc.creatorYucra Salas, J.J.
dc.date2017-03
dc.date2018-07-03T11:03:06Z
dc.date2018-07-03T11:03:06Z
dc.date.accessioned2026-06-27T14:00:17Z
dc.descriptionTo date, the spatial distribution pattern and density of Brazil nut trees in logged forest stands is unclear across the Amazon basin. We asked the following questions: (1) What are the densities and spatial distributions of Brazil nut juveniles (10 ≤ dbh < 40 cm) and adults (≥ 40 cm dbh) in three selectively logged Brazil nut concessions (1413 ha sampled) in Madre de Dios, Peru; (2) What is the spatial relationship between adults and juveniles (10 ≤ dbh < 30 cm); and (3) What is the spatial relationship between juveniles (10 ≤ dbh <30 cm) and cut stumps (≥ 10 y)? Spatial analyses were conducted using statistics derived from Ripley's K function. Juveniles were aggregated in all three concessions. Results for adult populations rejected the null hypothesis of a random distribution among trees ≥ 40 cm dbh. We did not find an attraction between juveniles and cut-stump locations, nor between adults and juveniles. The strong peaks of aggregation for juveniles and adult Brazil nuts in this study occurred at long distances (300–900 m), suggesting multiple tree canopy gaps as drivers of spatial distribution patterns, either via natural or anthropogenic sources. Our data contribute to a more thorough understanding of Brazil nut population structure in disturbed forests in south-western Amazonia.
dc.identifierhttps://hdl.handle.net/10568/95503
dc.identifier.urihttp://hdl.handle.net/123456789/70891
dc.languageen
dc.publisherCambridge University Press
dc.rightsLimited Access
dc.sourceRockwell, Cara A., Guariguata, M.R., Menton, M., Arroyo Quispe, E., Quaedvlieg, J., Warren-Thomas, E., Fernandez Silva, H., Jurado Rojas, E.E., Kohagura Arrunátegui, J.A.H., Meza Vega, L.A., Quenta Hancco, R., Revilla Vera, O., Valera Tito, J.F., Villarroel Panduro, B.T., Yucra Salas, J.J.. 2017. Spatial distribution of Bertholletia excelsa in selectively logged forests of the Peruvian Amazon Journal of Tropical Ecology, 33 (2) : 114-127. https://doi.org/10.1017/S0266467416000614
dc.subjectforests
dc.subjecttrees
dc.subjectbrazil nuts
dc.subjectspatial distribution
dc.subjectmultiple use forestry
dc.titleSpatial distribution of Bertholletia excelsa in selectively logged forests of the Peruvian Amazon
dc.typeJournal Article

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Centro para la Investigación Forestal Internacional (CIFOR)