Dispersal mode,shade tolerance,and phytogeographical affinity of tree species during secondary succession in tropical montane cloud forest |
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Authors: | Miguel Angel Muñiz-Castro Guadalupe Williams-Linera Miguel Martínez-Ramos |
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Institution: | 1.Ecología Funcional,Instituto de Ecología, A.C.,Xalapa,Mexico;2.Centro de Investigaciones en Ecosistemas,Universidad Nacional Autónoma de México,Morelia,Mexico;3.Departamento de Botánica y Zoología, CUCBA,Universidad de Guadalajara,Zapopan,Mexico |
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Abstract: | Secondary succession following land abandonment, represented by a chronosequence of 15 old fields (0–80 years old) and two
old-growth forests, was studied in the tropical montane cloud forest region of Veracruz, Mexico. The objective was to determine
successional trajectories in forest structure and species richness of trees ≥5 cm DBH, in terms of differences in seed dispersal
mode, shade tolerance, and phytogeographical affinity. Data were analyzed using AIC model selection and logistic regressions.
Mean and maximum canopy height reached values similar to old-growth forest at 35 and 80 years, respectively. Species richness
and diversity values were reached earlier (15 and 25 years, respectively) while basal area and stem density tended to reach
old-growth forest values within 80 years. Along the chronosequence, the proportion of species and individuals of wind-dispersed
trees declined, that of bird dispersed small seeded trees remained constant, while that of gravity and animal dispersed large
seeded trees increased; shade-intolerant species and individuals declined, while intermediate and shade-tolerant trees increased.
Shade-tolerant canopy trees were rare during succession, even in the old-growth forest. Tropical tree species were more frequent
than temperate ones throughout the chronosequence, but temperate tree individuals became canopy dominants at intermediate
and old-growth forest stages. |
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