{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T04:14:17Z","timestamp":1760242457223,"version":"build-2065373602"},"reference-count":55,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2017,7,23]],"date-time":"2017-07-23T00:00:00Z","timestamp":1500768000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Forests"],"abstract":"<jats:p>Timber management directly influences the population dynamics of tree species, like Copaifera spp. (copa\u00edba), which provide oil-resin with ecological and economic importance. The aim of this study was to evaluate the structure and population dynamics of Copaifera in unmanaged and managed stands by reduced-impact logging (RIL) in eastern Amazon in Par\u00e1 state, Brazil. Based on a stem map of the study area, 40 Copaifera trees were randomly selected, where an equal number of trees were selected in managed and unmanaged stands. A transect of 10 \u00d7 100 m was centered at each tree (50 m each side) to assess Copaifera regeneration. Transects were subdivided into ten plots, of which six were systematically chosen to assess the height, diameter and number of Copaifera seedlings and saplings. The field assessment occurred in 2011 and 2013. To estimate the amount of sunlight transmitted to the forest floor, we computed canopy cover from airborne LiDAR data. According to the results, the abundance of Copaifera seedlings\/saplings was higher in managed than unmanaged stands. About 5% of Copaifera regeneration was found between 45\u201350 m from the Copaifera tree while ~73% of regeneration was concentrated within a 10 m radius of the Copaifera tree. We verified that the diameter distribution of Copaifera regeneration was not a negative exponential distribution, as is typical of most tree species in natural forest. Rather, the Copaifera regeneration had a spatially aggregated distribution. In this short-term analysis, the impact of timber management is not negatively affecting the population structure or dynamics of Copaifera regeneration.<\/jats:p>","DOI":"10.3390\/f8070257","type":"journal-article","created":{"date-parts":[[2017,7,24]],"date-time":"2017-07-24T10:04:13Z","timestamp":1500890653000},"page":"257","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Short-Term Effects of Reduced-Impact Logging on Copaifera spp. (Fabaceae) Regeneration in Eastern Amazon"],"prefix":"10.3390","volume":"8","author":[{"given":"Carine","family":"Klauberg","sequence":"first","affiliation":[{"name":"US Forest Service (USDA), Rocky Mountain Research Station, RMRS, 1221 South Main Street, Moscow, ID 83843, USA"},{"name":"Department of Forest Sciences, Escola Superior de Agricultura \u201cLuiz de Queiroz\u201d, University of S\u00e3o Paulo, Av. P\u00e1dua Dias, 11 Cx. P. 09, Piracicaba CEP 13418-900, Brazil"}]},{"given":"Edson","family":"Vidal","sequence":"additional","affiliation":[{"name":"Department of Forest Sciences, Escola Superior de Agricultura \u201cLuiz de Queiroz\u201d, University of S\u00e3o Paulo, Av. P\u00e1dua Dias, 11 Cx. P. 09, Piracicaba CEP 13418-900, Brazil"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7844-3560","authenticated-orcid":false,"given":"Carlos","family":"Silva","sequence":"additional","affiliation":[{"name":"US Forest Service (USDA), Rocky Mountain Research Station, RMRS, 1221 South Main Street, Moscow, ID 83843, USA"},{"name":"Department of Natural Resources and Society, College of Natural Resources, University of Idaho (UI), 875 Perimeter Drive, Moscow, ID 83843, USA"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7480-1458","authenticated-orcid":false,"given":"Andrew","family":"Hudak","sequence":"additional","affiliation":[{"name":"US Forest Service (USDA), Rocky Mountain Research Station, RMRS, 1221 South Main Street, Moscow, ID 83843, USA"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8435-1136","authenticated-orcid":false,"given":"Manuela","family":"Oliveira","sequence":"additional","affiliation":[{"name":"Departamento de Matem\u00e1tica, Escola de Ci\u00eancias e Tecnologia, Universidade de \u00c9vora, Rom\u00e3o Ramalho 59, \u00c9vora 7000-671, Portugal"}]},{"given":"Pedro","family":"Higuchi","sequence":"additional","affiliation":[{"name":"Department of Forest Engineering, University of Santa Catarina State-Agroveterin\u00e1rias Science Center. Av. Luiz de Cam\u00f5es, 2090, Conta Dinheiro, Lages CEP 88520-000, Brazil"}]}],"member":"1968","published-online":{"date-parts":[[2017,7,23]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Zeppel, H. (2006). Indigenous Ecotourism: Sustainable Development and Management, CABI.","DOI":"10.1079\/9781845931247.0000"},{"key":"ref_2","unstructured":"Instituto Brasileiro de Geografia e Estat\u00edstica (IBGE) (2015, February 18). Estudos e Pesquisas Informa\u00e7\u00e3o Geogr\u00e1fica N\u00famero 9, Available online: http:\/\/geoftp.ibge.gov.br\/documentos\/recursos_naturais\/indicadores_desenvolvimento_sustentavel\/2012\/ids2012.pdf."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"2032","DOI":"10.1890\/0012-9658(1998)079[2032:RFFATD]2.0.CO;2","article-title":"Rain forest fragmentation and the dynamics of Amazonian tree communities","volume":"79","author":"Laurance","year":"1998","journal-title":"Ecology"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"1745","DOI":"10.1016\/j.biocon.2008.04.024","article-title":"Forest fragmentation and edge effects from deforestation and selective logging in the Brazilian Amazon","volume":"141","author":"Broadbent","year":"2008","journal-title":"Biol. Conserv."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"41","DOI":"10.1007\/s11056-006-9036-1","article-title":"Effects of light availability and soil flooding on growth and photosynthetic characteristics of Genipa americana L. seedlings","volume":"34","author":"Lavinsky","year":"2007","journal-title":"New For."},{"key":"ref_6","unstructured":"Souza, V.C., and Lorenzi, H. (2008). Bot\u00e2nica Sistem\u00e1tica: Guia Ilustrado Para Identifica\u00e7\u00e3o das Fam\u00edlias Nativas e Ex\u00f3ticas no Brasil, Baseado em APG II, Instituto Plantarum. [2nd ed.]."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"273","DOI":"10.1590\/S0100-40422002000200016","article-title":"The Copaifera L. genus","volume":"25","author":"Pinto","year":"2002","journal-title":"Qu\u00edm. Nova"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"31","DOI":"10.1016\/j.foreco.2012.06.006","article-title":"Population structure of two low-density neotropical tree species under different management systems","volume":"280","author":"Sist","year":"2012","journal-title":"For. Ecol. Manag."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"41","DOI":"10.1016\/j.foreco.2012.03.020","article-title":"Cross-scale variation in the density and spatial distribution of an Amazonian non-timber forest resource","volume":"276","author":"Newton","year":"2012","journal-title":"For. Ecol. Manag."},{"key":"ref_10","unstructured":"Diamond, J.M., and Case, T.J. (1986). Biology, chance and the history and structure of tropical rain Forest tree communities. Community Ecology, Harper and Row."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"123","DOI":"10.1590\/S0102-33061992000100010","article-title":"Estrutura populacional de copa\u00edba (Copaifera langsdorffii Desf.) em mata ciliar do Distrito Federal","volume":"6","author":"Leite","year":"1992","journal-title":"Acta Amazon. Bras."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"405","DOI":"10.1590\/S1516-89132003000300012","article-title":"Spatial heterogeneity and its influence on Copaifera langsdorffii Desf. (Caesalpiniaceae)","volume":"46","author":"Resende","year":"2003","journal-title":"Braz. Arch. Biol. Technol."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"223","DOI":"10.1023\/A:1009771519028","article-title":"Spatial structure and regeneration of Tretamerista glabra in peat swamp rain forest in Indonesian Borneo","volume":"131","author":"Gavin","year":"1997","journal-title":"Plant Ecol."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"349","DOI":"10.1080\/17550874.2012.716088","article-title":"Age and light effects on seedling growth in two alternative secondary successions in central Amazonia","volume":"7","author":"Jakovac","year":"2014","journal-title":"Plant Ecol. Divers."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"169","DOI":"10.1016\/0378-1127(92)90099-U","article-title":"Logging impacts and prospects for sustainable forest management in an old Amazonian frontier: The case of Paragominas","volume":"55","author":"Verissimo","year":"1992","journal-title":"For. Ecol. Manag."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"47","DOI":"10.1016\/S0378-1127(99)00199-1","article-title":"Regeneration of timber species following selection logging in a Bolivian tropical dry forest","volume":"131","author":"Fredericksen","year":"2000","journal-title":"For. Ecol. Manag."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"2002","DOI":"10.1016\/j.foreco.2010.08.050","article-title":"A model for comparing reduced impact logging with conventional logging for an Eastern Amazonian Forest","volume":"250","author":"Macpherson","year":"2010","journal-title":"For. Ecol. Manag."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"93","DOI":"10.1016\/S0378-1127(01)00530-8","article-title":"Financial and ecological indicators of reduced impact logging performance in the eastern Amazon","volume":"163","author":"Holmes","year":"2002","journal-title":"For. Ecol. Manag."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1007\/s004420100809","article-title":"Plant diversity in tropical forests: A review of mechanisms of species coexistence","volume":"130","author":"Wright","year":"2002","journal-title":"Oecologia"},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"97","DOI":"10.1016\/j.foreco.2016.11.036","article-title":"Natural regeneration of tree species in the Eastern Amazon: Short-term responses after reduced-impact logging","volume":"385","author":"Schwartz","year":"2017","journal-title":"For. Ecol. Manag."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"3","DOI":"10.1590\/1809-43921981111003","article-title":"Estudos silviculturais de uma popula\u00e7\u00e3o natural de Copaifera multijulga Hayne\u2013Leguminosae, na Amaz\u00f4nia Central. 1\u2014Germina\u00e7\u00e3o","volume":"11","author":"Alencar","year":"1981","journal-title":"Acta Amazon."},{"key":"ref_22","unstructured":"Hosokawa, R.T., Moura, J.B., and Cunha, U.S. (1998). Introdu\u00e7\u00e3o ao Manejo e Economia de Florestas, Universidade Federal do Paran\u00e1."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"303","DOI":"10.4257\/oeco.2011.1502.08","article-title":"A restaura\u00e7\u00e3o ecol\u00f3gica em destaque: Um retrato dos \u00faltimos vinte e oito anos de publica\u00e7\u00f5es na \u00e1rea","volume":"15","author":"Oliveira","year":"2011","journal-title":"Oecol. Aust."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"116","DOI":"10.1016\/j.foreco.2012.02.028","article-title":"Mid-term effects of reduced-impact logging on the regeneration of seven tree commercial species in the Eastern Amazon","volume":"274","author":"Schwartz","year":"2012","journal-title":"For. Ecol. Manag."},{"key":"ref_25","unstructured":"RADAMBRASIL (1983). Projeto RADAMBRASIL: 1973\u20131983, Levantamento de Recursos Naturais. v. 1\u201323, Departamento Nacional de Produ\u00e7\u00e3o Mineral, Minist\u00e9rio das Minas e Energia."},{"key":"ref_26","unstructured":"Instituto Brasileiro de Geografia e Estat\u00edstica (IBGE) (2012). Manual T\u00e9cnico da Vegeta\u00e7\u00e3o Brasileira, Instituto Brasileiro de Geografia e Estat\u00edstica."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"91","DOI":"10.2307\/2261703","article-title":"Mortality and recruitment rate evaluations in heterogeneous tropical forests","volume":"84","author":"Sheil","year":"1996","journal-title":"J. Ecol."},{"key":"ref_28","unstructured":"Steel, R.G.D., and Torrie, J.H. (1980). Principles and Procedures of Statistics, McGraw Hill Book."},{"key":"ref_29","unstructured":"Hollander, M., and Wolfe, D.A. (1999). Nonparametric Statistical Methods, John Wiley & Sons. [2nd ed.]."},{"key":"ref_30","doi-asserted-by":"crossref","unstructured":"Hosmer, D.W., and Lemeshow, S. (2000). Applied Logistic Regres\u00adsion, Wiley Series in Probability and Mathematical Statistics. [2nd ed.].","DOI":"10.1002\/0471722146"},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"109","DOI":"10.1016\/S0378-1127(98)00419-8","article-title":"Modeling individual tree mor\u00adtality for Austrian forest species","volume":"113","author":"Monserud","year":"1999","journal-title":"For. Ecol. Manag."},{"key":"ref_32","unstructured":"Mendenhall, W., and Scheaffer, R. (1973). Mathematical Statistics with Applications, Duxbury Press."},{"key":"ref_33","unstructured":"R Development Core Team (2016). R: A Language and Environment for Statistical Computing, R Foundation for Statistical Computing. Available online: http:\/\/www.R-project.org."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"934","DOI":"10.3390\/rs1040934","article-title":"Review: LiDAR Utility for Natural Resource Managers","volume":"1","author":"Hudak","year":"2009","journal-title":"Remote Sens."},{"key":"ref_35","first-page":"591","article-title":"Mapping aboveground carbon stocks using LiDAR data in Eucalyptus spp. plantations in the state of S\u00e3o Paulo, Brazil","volume":"42","author":"Silva","year":"2014","journal-title":"Sci. For."},{"key":"ref_36","doi-asserted-by":"crossref","unstructured":"Silva, C.A., Klauberg, C., Hudak, A.T., Vierling, L.A., Liesenberg, V., Carvalho, S.P., and Rodriguez, L.C. (2016). A principal component approach for predicting the stem volume in Eucalyptus plantations in Brazil using airborne Lidar data. Forestry, 1\u201312.","DOI":"10.1093\/forestry\/cpw016"},{"key":"ref_37","unstructured":"McGaughey, R.J. (2014, May 20). FUSION\/LDV3.42: Software for LiDAR Data Analysis and Visualization, Available online: http:\/\/http:\/\/forsys.cfr.washington.edu\/fusion\/ FUSION_manual.pdf."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"331","DOI":"10.1017\/S0266467400002315","article-title":"Tree population dynamics at Kade, Ghana","volume":"3","author":"Swaine","year":"1987","journal-title":"J. Trop. Ecol."},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"3174","DOI":"10.1890\/02-0038","article-title":"Gap-dependent recruitment, realized vital rates, and size distributions of tropical trees","volume":"84","author":"Wright","year":"2003","journal-title":"Ecology"},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"225","DOI":"10.1590\/1809-43921984142279","article-title":"Estudos silviculturais de uma popula\u00e7\u00e3o natural de Copaifera multijulga Hayne\u2013Leguminosae, na Amaz\u00f4nia Central. 3\u2014Distribui\u00e7\u00e3o espacial da regenera\u00e7\u00e3o natural pr\u00e9-existente","volume":"14","author":"Alencar","year":"1984","journal-title":"Acta Amazon."},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"163","DOI":"10.1590\/1809-43921979091163","article-title":"Fenologia de esp\u00e9cies florestais em floresta tropical \u00famida de terra firme na Amaz\u00f4nia Central","volume":"9","author":"Alencar","year":"1979","journal-title":"Acta Amazon."},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"183","DOI":"10.1590\/S0100-84042002000200007","article-title":"Fenologia da copa\u00edba (Copaifera langsdorffii Desf.\u2014Leguminosae, Caesalpinioideae) em uma floresta semidec\u00eddua no sudeste do Brasil","volume":"25","author":"Pedroni","year":"2002","journal-title":"Rev. Bras. Bot."},{"key":"ref_43","unstructured":"Elias, M.E.A. (1997). Estabelecimento de Pl\u00e2ntulas de Copaifera Multijuga Hayne\u2014(Caesalpiniaceae) em Fragmentos Florestais e Est\u00e1dios de Sucess\u00e3o. [Master\u2019s Thesis, National Institute for Amazonian Research]."},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"165","DOI":"10.1007\/s00442-002-0872-1","article-title":"Light gradient partitioning by tropical seedlings in the absence of canopy gaps","volume":"131","author":"Montgomery","year":"2002","journal-title":"Oecologia"},{"key":"ref_45","first-page":"63","article-title":"Crescimento de \u00e1rvores em uma \u00e1rea de terra firme na Floresta Nacional do Tapaj\u00f3s ap\u00f3s a colheita de madeira","volume":"50","author":"Costa","year":"2008","journal-title":"Rev. Cienc. Agrar."},{"key":"ref_46","unstructured":"Rigamonte-Azevedo, O.C., Wadt, P.G.S., and Wadt, L.H.O. (2004). Copa\u00edba: Ecologia e Produ\u00e7\u00e3o de \u00f3leo-resina, Embrapa Acre. [1st ed.]. (Documentos 91)."},{"key":"ref_47","doi-asserted-by":"crossref","first-page":"427","DOI":"10.1016\/j.foreco.2005.10.049","article-title":"Diameter distributions and structural sustainability in forests","volume":"222","author":"Rubin","year":"2006","journal-title":"For. Ecol. Manag."},{"key":"ref_48","doi-asserted-by":"crossref","first-page":"311","DOI":"10.1590\/S0100-84042002000300007","article-title":"Biologia reprodutiva de Copaifera langsdorffii Desf. (Leguminosae, Caesalpinioedeae)","volume":"25","author":"Freitas","year":"2002","journal-title":"Rev. Bras. Bot."},{"key":"ref_49","doi-asserted-by":"crossref","first-page":"369","DOI":"10.1590\/1809-43922000303375","article-title":"Comportamento de sementes de Copaifera multijuga durante o armazenamento","volume":"30","author":"Garcia","year":"2000","journal-title":"Acta Amazon."},{"key":"ref_50","doi-asserted-by":"crossref","first-page":"501","DOI":"10.1086\/282687","article-title":"Herbivores and the number of tree species in tropical forests","volume":"104","author":"Janzen","year":"1970","journal-title":"Am. Nat."},{"key":"ref_51","unstructured":"den Boer, K.A., and Gradwell, G.R. (1971). On the role of natural enemies in prevent competitive exclusion in some marine animal and rainforest trees. Dynamics of Populations, Proceedings of the Advanced Study Institute on Dynamics of Numbers in Populations, PUDOC."},{"key":"ref_52","doi-asserted-by":"crossref","first-page":"1414","DOI":"10.1126\/science.288.5470.1414","article-title":"Spatial patterns in the distribution of tropical tree species","volume":"288","author":"Condit","year":"2000","journal-title":"Science"},{"key":"ref_53","doi-asserted-by":"crossref","first-page":"431","DOI":"10.1146\/annurev.es.18.110187.002243","article-title":"Tropical rainforest gaps and tree species diversity","volume":"18","author":"Denslow","year":"1987","journal-title":"Ann. Rev. Ecol. Syst."},{"key":"ref_54","doi-asserted-by":"crossref","first-page":"369","DOI":"10.1017\/S0266467400008038","article-title":"Tropical tree seedling dynamics: recruitment patterns and their population consequences for three canopy species in Panama","volume":"10","year":"1994","journal-title":"J. Trop. Ecol."},{"key":"ref_55","doi-asserted-by":"crossref","first-page":"408","DOI":"10.2307\/2389235","article-title":"Spatial patterns of two rodent-dispersed rain forest trees Carapa procera (Meliaceae) and Vouacapoua americana (Caesalpiniaceae) at Paracou, French Guiana","volume":"26","author":"Forget","year":"1994","journal-title":"Biotropica"}],"container-title":["Forests"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1999-4907\/8\/7\/257\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T18:43:43Z","timestamp":1760208223000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1999-4907\/8\/7\/257"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2017,7,23]]},"references-count":55,"journal-issue":{"issue":"7","published-online":{"date-parts":[[2017,7]]}},"alternative-id":["f8070257"],"URL":"https:\/\/doi.org\/10.3390\/f8070257","relation":{},"ISSN":["1999-4907"],"issn-type":[{"type":"electronic","value":"1999-4907"}],"subject":[],"published":{"date-parts":[[2017,7,23]]}}}