Forest dynamics of a sub-xerophilous vegetation formation in central Peru-Chanchamayo valley, Peru [Dinâmica florestal de uma formação vegetais sub-xerófila no valor de Chanchamayo, departamento Junin, Peru]

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Palacios-Ramos S.
Montenegro R.
Linares-Palomino R.
Reynel C.
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Sociedade de Investigacoes Florestais
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Studies about the complex processes of forest dynamics in pre-montane and montane forests (between 600 – 3000 m altitude) are rare. This study contributes to our knowledge on changes in the floristic composition and population dynamics of woody species in a sub-xerophilous formation immersed in the humid pre-montane and montane forests of Peru. In 2015 we re-measured trees with diameter at breast height equal or greater than10cm in a permanent plot established in 2009. We recorded 31 species of 25 families, with a Fisher’s Alpha diversity index of 7.5. The most abundant and dominant species (including Heteropterys intermedia, Physocalymma scaberrimum, Sapium glandulosum, Tachigali peruviana and Machaerium hirtum) represented 66.25% of all species in 2009 and 66.36% in 2015. The prevalence of these species and others ensures the maintenance of a characteristic seasonally dry forest formation within the census period (6.25 years). The dynamics of this forest, with a high rate of recruitment (3.82%) and a low rate of mortality (0.72%), show favorable conditions for the maintenance of this forest fragment. © 2018, Sociedade de Investigacoes Florestais. All rights reserved.
WethankRobin Fernández,Aniceto Daza and José LuisMarceloPeñafromtheUniversidadNacionalAgraria LaMolina Herbarium(MOL:Woody plants collection), for their contributions to taxonomic identification. To IRD-Selva Central - UNALM for help in establishing andcensusofthepermanentplot.Wethankthereviewers for their contribution to improve the manuscript. This study was supported by Cienciactiva, CONCYTEC.
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Recruitment, Dry forest, Mortality