Revista Mexicana de Biodiversidad (Mar 2011)
Riqueza y diversidad de especies de aves asociadas a manglar en tres sistemas lagunares en la región costera de Oaxaca, México Richness and diversity of bird species associated with mangrove in three lagoon systems in the coastal region of Oaxaca, Mexico
Abstract
Se documentó la riqueza y diversidad avifaunística mediante capturas y conteos en las lagunas de Chacahua, Manialtepec y La Ventanilla. La diversidad de Shannon-Wiener se comparó mediante pruebas t de Hutcheson y la similitud de la riqueza avifaunística y se determinaron diferencias entre la abundancia de especies. Se generaron curvas de acumulación de especies y se estimó la riqueza con el indicador de cobertura basado en frecuencia. Se registraron 17 órdenes, 39 familias y 94 especies: 69 residentes y 25 migratorias. La abundancia no presentó diferencias (p>0.05). Hubo diferencias en la diversidad de especies entre las lagunas; La Ventanilla presentó la más elevada (3.51). La mayor similitud se obtuvo entre Chacahua y Manialtepec con 56% y la menor entre Manialtepec y La Ventanilla con 42%. La riqueza y proporción de especies residentes y migratorias fue similar en las 3 áreas; no obstante, por la baja similitud, se infiere que la diferencia en la composición de especies es significativa y que existe la posibilidad de registrar otras. Esta información complementa estudios previos, representa un inventario actualizado e indica que la avifauna asociada a manglar no se ha documentado totalmente.Avian richness and diversity was recorded in the lagoons of Chacahua, Manialtepec and La Ventanilla, using counts and captures. Shannon-Wiener diversity was compared using the Hutcheson's t-test, similarity of species richness was determined, as were differences in abundance. Species accumulation curves were generated and richness was estimated using the Incidence-based Estimator. 17 orders, 39 families and 94 species were registered, 65 of which were resident and 25 of which were migratory. While no difference in abundance was detected (p > 0.05), there was difference in diversity between the lagoons, with La Ventanilla presenting the highest index (3.51). The greatest similarity obtained was between Chacahua and Manialtepec, with 56%, and the least was between Manialtepec and La Ventanilla, with 42%. The richness and proportion of resident and migratory species was similar in the 3 areas; however, due to the low similarity, it is inferred that species composition differs significantly and that possibilities of registering other species exist. This information complements previous studies, it represents a current inventory and indicates that the avifauna associated with mangroves has not been totally documented.
