SciELO - Scientific Electronic Library Online

 
vol.91Ecology of the neotropical otter (Lontra longicaudis) in southern Tehuacán-Cuicatlán Biosphere Reserve, MexicoReproductive output in spiny lizards (genus Sceloporus) with different reproductive mode. A comparative approach author indexsubject indexsearch form
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

  • Have no similar articlesSimilars in SciELO

Share


Revista mexicana de biodiversidad

On-line version ISSN 2007-8706Print version ISSN 1870-3453

Abstract

ALMAZAN-NUNEZ, R. Carlos et al. Alpha and beta bird diversity in humid and semi-humid tropical forests of the sierra de Atoyac, a priority region for conservation of southern Mexico. Rev. Mex. Biodiv. [online]. 2020, vol.91, e913344.  Epub Mar 01, 2021. ISSN 2007-8706.  https://doi.org/10.22201/ib.20078706e.2020.91.3344.

This study describes the alpha and beta diversity of the avifauna present in the cloud forest and semideciduous forest along an elevational gradient ranging from 600-2,200 m in the sierra de Atoyac, Guerrero. Bird species records were obtained through sightings and vocal identification in 126 linear transects. Alpha diversity among both forests was compared using rarefaction-extrapolation methods, as well as the number of resident species and endemics between altitudinal intervals. Beta diversity for the resident avifauna among forests and altitudinal intervals was compared. Bird species were categorized according to their type of diet, seasonality, endemism, and conservation status. We recorded 206 bird species. The cloud forest had the highest values of taxonomic richness, as well as the highest proportion of endemic birds and at-risk species. The number of species showed an increase in the medium part of the gradient, but not the endemism. Turnover and nestedness values were lowest among vegetation types and increased when altitudinal intervals were compared. The types of diet best represented in both forests were insectivorous and insectivorous-frugivorous. Bird taxonomic richness of the sierra de Atoyac increased by 28%, which highlights the importance to maintain monitoring strategies in highly biodiverse environments of the Mexican tropics.

Keywords : Cloud forest; Semideciduous forest; Species richness; Species turnover; Endemism; Sierra Madre del Sur.

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