3 research outputs found
Microalgal biofilm cultivation systems for enhanced biomass production
No full textAbstract not currently available
Temporal changes of waterbirds at the “Valsequillo Reservoir”, a Ramsar site in Puebla, México
No full textThe Ramsar Convention seeks to promote the conservation and sustainable use of internationally important wetlands and their biological resources. In 2012, the “Valsequillo Reservoir” (Mexico) was accepted as a Ramsar site, but many themes about the ecology of its avifauna remain unknown. This paper aims to increase our knowledge on the ornithological importance of this Ramsar site, by studying temporal changes in waterbird community structure. From Feb 2014 to Jan 2015, waterbirds were monthly censused from an outboard boat and abundance data were used to study how species richness and diversity changed through time. By means of multivariate techniques, clusters of months were obtained from the similarity matrix and their statistical significance was tested. Finally, the main species explaining those clusters were identified. A total of 30 waterbird species were observed, but monthly richness (standardized for 768 individuals) varied from 12 to 20. From May to September, waterbird community was simpler (i.e., with less abundance, richness and diversity) than from October to March. Main changes in bird community structure were due to variations in the abundance of a small number of species; i.e., the American Coot (Fulica americana), the Northern Shoveler (Anas clypeata) and the Ruddy Duck (Oxyura jamaicensis). Without excluding other possible reasons for these changes, our study suggests that ducks (Anatidae) use the Reservoir mainly as a wintering site, whereas herons (Ardeidae) use it mainly as a stopover site during autumn migration. By maximizing the abundance, richness or diversity of waterbird species observed, our data could be applied in ecotourism (birdwatching) programs
Nuevos registros de aves acuáticas en la Presa de Valsequillo, Puebla
No full textLos humedales contribuyen al mantenimiento de la diversidad biológica y son vitales como zonas de descanso y alimentación
para las aves acuáticas migratorias de largo recorrido. En el estado de Puebla, la presa Manuel Ávila Camacho fue designada,
en 2012, como Humedal de Importancia Internacional (sitio Ramsar no. 2027) y Área Natural Protegida de Jurisdicción Estatal
“Humedal de Valsequillo”, debido a que se han registrado previamente gran abundancia y diversidad de aves bajo algún estatus
de protección, tanto residentes como migratorias. Con base en censos mensuales realizados entre diciembre de 2013 y enero de
2015, reportamos la presencia de cuatro especies de aves acuáticas migratorias nuevas en la zona. Observamos patos arcoíris
(Aix sponsa) siendo éste el primer registro tanto en el humedal como en todo el estado. Además, documentamos la presencia de
varias garzas tigre mexicanas (Tigrisoma mexicanum), un ibis blanco (Eudocimus albus) y un rayador americano (Rynchops niger).
Estas últimas especies no habían sido reportadas en la zona. De este modo, el número de especies de aves acuáticas observadas
en Valsequillo asciende a 60, y a 608 el total de especies de aves en el estado de Puebla
