Structure and diversity of a gallery forest in northeastern Mexico
DOI:
https://doi.org/10.29298/rmcf.v11i58.591Keywords:
Importance Value Index, Pretzsch Index, Shannon-Wiener Index, Platanus rzedoswkii Nixon & J. M. Poole, Taxodium mucronatum Ten.Abstract
The structure and diversity of the tree community of a gallery forest in northeastern Mexico was assessed. In 2017, at Allende municipality, Nuevo León, 15 sampling sites of 10 × 5 m were randomly established, where the individuals of arboreal size with a normal diameter (d1.30 m) ≥ 8 cm were measured. The horizontal structure was evaluated with the Importance Value Index, and the vertical structure, with Pretzsch’s index. For diversity, the Margalef and Shannon-Wiener indexes were calculated. Nine species were registered, belonging to nine genera and nine families. The evaluated community had 2187 N ha-1 abundance, with 496.3 m2 ha-1 basimetric area. The species with the highest abundance, dominance and frequency was Taxodium mucronatum, with 52.4 % of IVI value followed by Platanus rzedowskii (IVI = 23.2 %) and Carya illinoinensis (IVI = 8.8 %). Pretzsch’s index was 2.03, with a Amax of 3.29 and a Arel of 61.87, which indicates medium structural diversity in the high strata. The DMg value (Margalef index) of the community was 1.52 and average value of 0.58 for the Shannon-Wiener index, which indicate that the evaluated community has low richness and diversity.
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