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Revista mexicana de biodiversidad

versión On-line ISSN 2007-8706versión impresa ISSN 1870-3453


BELTRAN-RODRIGUEZ, Leonardo et al. Structure and tree diversity of secondary dry tropical forests in the Sierra de Huautla Biosphere Reserve, Morelos. Rev. Mex. Biodiv. [online]. 2018, vol.89, n.1, pp.108-122. ISSN 2007-8706.

The recovery in richness, composition, structure and tree diversity was studied in three conditions of secondary tropical deciduous forest with different time of abandonment (C35, C45 and C65 years) in the southeast of the state of Morelos. In each condition, three plots of 50 × 50 m (2,500 m2) were established and all individuals ≥ 2.5 cm of normal diameter (ND) were measured. In total, 2,791 individuals belonging to 79 species, 53 genera and 30 families were registered. Fabaceae was the family with the largest number of species and individuals. C45 had the highest species richness (57), followed by C35 (48) and C65 (43). The conditions were different (p < 0.0001) in basal area, total height, ND and crown coverage. The species with the highest relative value of importance (IVIR) and forest value (IVFR) were Pachycereus grandis (IVIR = 22.6, IVFR = 28.7), Amphipterygium adstringens (IVIR = 20.9, IVFR = 17.0), Lysiloma divaricatum (IVIR =11.2, IVFR = 18.9) and Quercus glaucoides (IVIR = 10.5, IVFR = 13.1). High significant differences (p < 0.001) between abandonment conditions were found for heterogeneity (Shannon-Wiener: H’), and highest significant values (p < 0.05) for Simpson reciprocal index (1/D) in C65, as well as to Margalef (DMG) and Fisher’s α (S) indexes in C35 and C45. The floristic similarity (Sorensen: Is) was highest among conditions with less time of abandonment (72%) and minimum with the condition of greater time (54%). The multiple response permutation procedure indicated significant differences (p < 0.05) in the species composition between early (C35 and C45) and late (C65) conditions. These results explain the process of secondary succession in the tropical deciduous forests of the study area and provide elements for improve planning of the activities leading to its conservation.

Palabras llave : Ecological and forest importance indexes; Forest dynamics; Secondary succession; Resilience; Hysteresis; Floristic similarity.

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