Abstract

MEDRANO-MERAZ, María de Jesús; HERNANDEZ, Francisco Javier; CORRAL-RIVAS, Sacramento  and  NAJERA-LUNA, Juan Abel. Arboreal diversity through topographic gradients in the El Salto, Durango Región. Ecosistemas y recur. agropecuarios [online]. 2017, vol.4, n.12, pp.525-534. ISSN 2007-901X.  https://doi.org/10.19136/era.a4n12.1121.

The objective of the study was to evalúate and compare arboreal diversity on different gradients of exposure and slope in an altitude range of 1,500 to 3,000 m.a.s.l. in températe forests of the El Salto, Durango region. The database was obtained from 268 sites of 0.1 ha randomly distributed in 12 communities. For each gradient, the species richness (S) was considered, as well as Shannon-Wiener proportional diversity index (H’), Simpson index (λ) and Pielou equity index (J’). The comparison of arboreal diversity was performed with rarefaction analysis. The results show that the exposure and slope factors modify species richness and proportional diversity, while the Shannon-Wiener and Simpson indexes presented an average diversity and species abundance tends to be heterogeneous. The rarefaction analysis indicated that there are significant differences in proportional diversity and species richness, while the species with the highest importance value index were Pinus durangensis and P. cooperi. Exposure is the most important source of variation on the richness and proportional diversity of arboreal species compared to the slope.

Keywords : Exposure; slope; rarefaction; richness; Shannon.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )