Distribución y abundancia del zooplancton en un área del Estero Salado, entre puente El Velero y puente Zigzag, de la ciudad de Guayaquil.
Fecha
2017
Autores
Título de la revista
ISSN de la revista
Título del volumen
Editor
Facultad de Ciencias Naturales. Universidad de Guayaquil
Resumen
La distribución y abundancia del zooplancton presente en el estero salado se determinó durante la fase de marea alta en 6 diferentes puntos de muestreos, entre el Puente El Velero y el Puente Zigzag de la ciudad de Guayaquil. Se realizó entre los meses de noviembre y diciembre 2016 y enero, febrero, agosto, septiembre, octubre 2017, utilizando redes de 300 micras, a un nivel superficial.
Se encontró un total de 265 790 org/100m3, de los cuales, el mayor porcentaje (50%), se encontró en el mes de octubre, en la estación 5 (frente a la cancha de la UG localizada frente a la Universidad Católica de Guayaquil). Los grupos más representativos fueron: nauplios de cyrripedios, copépodos calanoides, copépodos cyclopoides, cypris de cyrripedios, hidromedusas, anfípodos, quetognatos, bivalvos juveniles, poliquetos, larvas de anomuros (Porcelanidae), larvas zoeas y megalopa de braquiuro, larvas de peces, larvas peneidos y gasterópodos. Durante los meses monitoreados dominaron los nauplios cyrripedios, a su vez, los copépodos, cypris cyrripedios, quetognatos e hidromedusas.
La abundancia del zooplancton presento diferencias significativas entre los dos meses del año, (P < 0,05) siendo octubre de 2017 la de mayor abundancia. Factores ambientales como la influencia de agua oceánica durante el segundo semestre del año estarían incidiendo en esta diferencia significativa con los meses del año.
La diversidad y abundancia del zooplancton tuvieron una relación inversa, a mayor diversidad con 2,47 bits presentes enero 2017, menor abundancia 2.686 organismos zooplanctónicos en el punto 4 (UG Facultad de Ciencias Químicas), lugar en el que, durante el mes de octubre, se encontró el mayor número de taxones que aportaron al aumento de la diversidad.
The distribution and abundance of zooplankton present in the salty estuary was determined during the high tide phase at 6 different sampling points, between the El Velero Bridge and the Zigzag Bridge of the city of Guayaquil. It was carried out between the months of November and December 2016 and January, February, August, September, October 2017, using networks of 300 microns, at a superficial level. A total of 265 790 org / 100m3 was found, of which, the highest percentage (50%) was found in the month of October, in station 5 (in front of the UG field located in front of the Catholic University of Guayaquil). The most representative groups were: nauplii of cyrripedes, calanoid copepods, cyclopoid copepods, cypris of cyrripedes, hydromedusae, amphipods, quetognatos, juvenile bivalves, polychaetes, larvae of anomors (Porcelanidae), zoeas larvae and megalopa of brachyura, larvae of fish, larvae penaeids and gastropods. During the monitored months dominated the Cyrripedian nauplii, in turn, the copepods, cypris cyrripedios, quetognatos and hydromedusas. The abundance of zooplankton showed significant differences between the two months of the year, (P <0.05), with October 2017 being the most abundant. Environmental factors such as the influence of ocean water during the second half of the year would be affecting this significant difference with the months of the year. The diversity and abundance of zooplankton had an inverse relationship, to greater diversity with 2.47 bits present January 2017, lower abundance 2,686 zooplankton organisms in point 4 (UG Faculty of Chemical Sciences), place in which, during the wet season, We found the largest number of taxa that contributed to the increase in diversity.
The distribution and abundance of zooplankton present in the salty estuary was determined during the high tide phase at 6 different sampling points, between the El Velero Bridge and the Zigzag Bridge of the city of Guayaquil. It was carried out between the months of November and December 2016 and January, February, August, September, October 2017, using networks of 300 microns, at a superficial level. A total of 265 790 org / 100m3 was found, of which, the highest percentage (50%) was found in the month of October, in station 5 (in front of the UG field located in front of the Catholic University of Guayaquil). The most representative groups were: nauplii of cyrripedes, calanoid copepods, cyclopoid copepods, cypris of cyrripedes, hydromedusae, amphipods, quetognatos, juvenile bivalves, polychaetes, larvae of anomors (Porcelanidae), zoeas larvae and megalopa of brachyura, larvae of fish, larvae penaeids and gastropods. During the monitored months dominated the Cyrripedian nauplii, in turn, the copepods, cypris cyrripedios, quetognatos and hydromedusas. The abundance of zooplankton showed significant differences between the two months of the year, (P <0.05), with October 2017 being the most abundant. Environmental factors such as the influence of ocean water during the second half of the year would be affecting this significant difference with the months of the year. The diversity and abundance of zooplankton had an inverse relationship, to greater diversity with 2.47 bits present January 2017, lower abundance 2,686 zooplankton organisms in point 4 (UG Faculty of Chemical Sciences), place in which, during the wet season, We found the largest number of taxa that contributed to the increase in diversity.
Descripción
pdf
Palabras clave
ABUNDANCIA, DISTRIBUCIÓN, ZOOPLANCTON, BIODIVERSIDAD