Resumo

GONZALEZ DELGADO, Marisol et al. Floristic composition and y structural characterization of the microphyllic desert scrub in Galeana, Nuevo León State. Rev. mex. de cienc. forestales [online]. 2017, vol.8, n.39, pp.83-98. ISSN 2007-1132.

Among the arid zones of Mexico, the microphylle desert scrubland stands out in 1 056 046 ha in the state of Nuevo León, and although it presents a diversity of ecosystems, it has a loss of vegetation calculated at 3 979.76 ha yr-1. Due to the interest of this association, the objectives of the actual study were to analyze its floristic composition and its description to characterize the structure, and contribute to the design of the management of its resources and make proposals aimed at its conservation. During spring the floristic composition and the diversity of two sites located in Galeana municipality were evaluated. At random, 16 sampling units (32 m x 32 m) were established, in which data were taken to estimate the relative values of abundance, dominance, frequency and importance value (VI) of herbaceous, shrub and tree species present. Height and cup diameter were recorded. A total of 3 875 individuals were classified, classified into 24 genera and 16 families, among them Asteraceae (8 genera) and Cactaceae (6 genera) are outstanding. The studied plant community is represented by Flourencia cernua (1 133) and Larrea tridentata (824), whose respective indexes of importance value were 40.40 % and 35.18 %. The richness of the α species of the communities was estimated using the Margalef index (DMg), the Shannon-Wiener index (H›), the Simpson index (D) and the Shannon-Wiener (E) Evenness Index. The calculated values were 1.98 for H ‘, 3.39 for DMg and 0.79 for D.

Palavras-chave : Floristic diversity Flourencia cernua DC.; Larrea tridentata (Sessé & Moc. ex DC.) Coville; desert microcline scrubland; Galeana municipality; Northeast of Mexico.

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