Macrobenthos of the coastal Budi Lagoon, southern Chile: Changes associated with seasonal environmental variation

  • Carlos Bertrán Universidad Austral de Chile; Institute of Marine Science and Limnology
  • Pablo Fierro Universidad Austral de Chile; Institute of Marine Science and Limnology
  • Elizabeth Encalada Universidad Austral de Chile; Institute of Marine Science and Limnology
  • Fernando Peña-Cortés Universidad Católica de Temuco; Territorial Planning Laboratory
  • Jaime Tapia Universidad de Talca; Institute of Chemistry and Natural Resources
  • Enrique Hauenstein Universidad Católica de Temuco; Faculty of Sciences
  • Luis Vargas-Chacoff Universidad Austral de Chile; Centro Fondap de Investigación de Altas Latitudes (IDEAL)
Keywords: Macrobenthos, Budi Lagoon, Araucania, Sediments, Spatial variability

Abstract

The purpose of the present study was to investigate the seasonal relationship of macrobenthos richness and abundance with sediment characteristics (i.e. texture and organic material) for the coastal Budi Lagoon in southern Chile. Physicochemical measurements and macrobenthos samples were taken over the course of a year at nine sampling stations. Sandy-muddy sediment was the most common, and high percentages of organic material were registered, varying significantly between seasons and stations. The recorded organic material was related to natural (resident wild birds) and anthropogenic (agriculture) sources. Regarding fauna, 28 benthonic taxa and 7092 individuals were identified, with temporal and spatial variations. The most abundant taxa year-round were the molluscs Littoridina cumingii and Kingiella chilenica and the bristle worm Prionospio patagonica. Together, the obtained results evidence the important impact of organic material on the macrobenthos, with macrobenthic richness and abundance decreasing in conditions of high organic material content. The recorded variations for different taxa may indicate a response to the land use around the Budi Lagoon, which is intensely subjected to agricultural and tourist activities.

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Published
2016-09-01
How to Cite
Bertrán, C., Fierro, P., Encalada, E., Peña-Cortés, F., Tapia, J., Hauenstein, E., & Vargas-Chacoff, L. (2016). Macrobenthos of the coastal Budi Lagoon, southern Chile: Changes associated with seasonal environmental variation. Brazilian Journal of Oceanography, 64(3), 239-248. https://doi.org/10.1590/S1679-87592016113306403
Section
Original Article