Phytoplankton community of the Itaya river basin in Loreto, Peru

Authors

  • Rosa Ismiño Programa de Investigación Para el Uso del Agua y sus Recursos (AQUAREC), Instituto de Investigaciones de la Amazonía Peruana (IIAP), Iquitos
  • Grace Montalván Universidad Nacional Agraria La Molina, Lima
  • Aurea García Programa de Investigación Para el Uso del Agua y sus Recursos (AQUAREC), Instituto de Investigaciones de la Amazonía Peruana (IIAP), Iquitos
  • José Maco Programa de Investigación Para el Uso del Agua y sus Recursos (AQUAREC), Instituto de Investigaciones de la Amazonía Peruana (IIAP), Iquitos
  • Salvador Tello Programa de Investigación Para el Uso del Agua y sus Recursos (AQUAREC), Instituto de Investigaciones de la Amazonía Peruana (IIAP), Iquitos
  • Juan José Palacios Programa de Investigación Para el Uso del Agua y sus Recursos (AQUAREC), Instituto de Investigaciones de la Amazonía Peruana (IIAP), Iquitos
  • Luciano Rodríguez Programa de Investigación Para el Uso del Agua y sus Recursos (AQUAREC), Instituto de Investigaciones de la Amazonía Peruana (IIAP), Iquitos

DOI:

https://doi.org/10.15381/rivep.v29i3.14766

Keywords:

phytoplankton, composition, diversity, Itaya river, Peruvian Amazon

Abstract

The phytoplankton community was evaluated in 21 samples collected in seven sites in the Itaya river basin. In total, 70 species belonging to 40 genera, 21 families and 6 divisions were identified. The most abundant group was Bacillariophytas (51%), followed by Chlorophytas (31%), Euglenophytas (11%), Cyanophytas (5%), and others (2%) corresponding to Xanthophyta and Chrysophyta. The best represented species were Surirella ovalis, Navicula sp and Pinnularia sp. For this ecosystem, the density was between 100 to 13 000 ind/l-1 (individuals per litre) out of a total of 24 500 ind/l-1, with a richness of 11 to 27 species and an abundance of 23 to 55 individuals. The analysis of diversity according to Shannon-Wiener was from 7.26 to 25 units of effective species, with an equity of Pielou of 0.84-0.97, which indicates that the populations were homogeneous. Regarding the similarity index, it shows that the phytoplankton communities were formed by three groups with a similarity of 35%. According to the diatomic index (IDG), it is concluded that the water of the Itaya river could be contaminated at the sampling points.

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Published

2018-09-06

Issue

Vol. 29 No. 3 (2018)

Section

Artículos Primarios

License

Copyright (c) 2018 Rosa Ismiño, Grace Montalván, Aurea García, José Maco, Salvador Tello, Juan José Palacios, Luciano Rodríguez

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How to Cite

Ismiño, R., Montalván, G., García, A., Maco, J., Tello, S., Palacios, J. J., & Rodríguez, L. (2018). Phytoplankton community of the Itaya river basin in Loreto, Peru. Revista De Investigaciones Veterinarias Del Perú, 29(3), 828-839. https://doi.org/10.15381/rivep.v29i3.14766