SciELO - Scientific Electronic Library Online

vol.39 número1Caracterización del tamaño de semilla nodriza de aguacate Esther y el desarrollo de sus plántulas índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados




Links relacionados

  • Não possue artigos similaresSimilares em SciELO


Revista fitotecnia mexicana

versão impressa ISSN 0187-7380


MORA-DONJUAN, Carlos A. et al. Spatial distribution, composition and structure of a thornscrub in northeastern México. Rev. fitotec. mex [online]. 2016, vol.39, n.1, pp.87-95. ISSN 0187-7380.

In this study we describe the forest structure using the tree spatial distribution in a Tamaulipan thornscrub (MET) area. We utilized a nearest neighbor approximation and computed the aggregation index (R), uniform angle index (W), segregation index (S), species mingling (Mi), diameter differentiation (Ti) and dominance (Ui), in order to provide information that can be used in ecological restoration. Our study was located in an area of MET without vegetation removal and no record of productive activity at least in 28 years. For the forest inventory we stablished four squared plots of 1600 m2 (40 x 40 m) in which every tree and shrub (d0.10 ≥ 5cm) were located and determined species scientific name; besides, we measured the crown diameter (m), total height (m), distance (m) and azimuth to the center of each plot. The main results were, for aggregation index R1 = 0.76, R2 = 0.43, R3 = 0.50 and R4 = 0.83; uniform angle index Wi1, = 0.57 ± 0.20, Wi2 = 0.61 ± 0.24, WI3 = 0.59 ± 0.23 and Wi4 = 0.52 ± 0.20; segregation index S1, = 0.24, S2 = 0.68, S3 = 0.66 and S4 = 0.04; species mingling Mi1, = 0.73 ± 0.24, Mi2 = 0.47 ± 0.35, Mi3 = 0.52 ± 0.34 and Mi4 = 0.84 ± 0; diameter differentiation Ti1,3,4 = 0.49 ± 0.35 and Ti2 = 0.48 ± 0.36; and diameter dominance U1, = 0.32 ± 0.15, U2 = 0.20 ± 0.13, U3 = 0.24 ± 0.14 and U4 = 0.22 ± 0.12. Hence, results based on aggregation and segregation indices show a random distribution in plots 1 and 4, and a clumped distribution in plots 2 and 3. According to the uniform angle index, we can conclude that this area has a regular distribution in all plots. The analysis of species mingling showed interspecific competition in plots 1 and 4, while in plots 2 and 3 there is an intraspecific competition. Finally, the diametric dominance and differentiation showed homogeneous distribution in all plots. Based on these results, we recommend that the plot 4 can be taken as a reference site because it showed special characteristics that could be replicated on degraded lands.

Palavras-chave : Tamaulipan Thornscrub; ecological restoration; spatial distribution index; differentiation index; dominance index.

        · resumo em Espanhol     · texto em Espanhol     · Espanhol ( pdf )


Creative Commons License Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons