Composición, estructura y flujo energético del meiobentos frente a Chile central

Javier Sellanes, Carlos Neira, Eduardo Quiroga

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

15 Citas (Scopus)

Resumen

The general objective of this study was to determine the structure of metazoan meiofauna (at a high taxonomic level) and to estimate its role in the energy flux of the benthic sub-system off Concepción, Chile (∼36°30′ S). Samples were collected in May and November 1997 and May 1998 at five sites located at the: inner Bay of Concepción (28 m), bay-mouth (35 m), inner-shelf (64 m), mid-shelf (88 m) and outer-shelf (120 m). The study period coincided with the El Niño 1997-1998 (EN) event. The diversity of the meiobenthos was low, but density and biomass were moderate to high compared with average values reported for muddy sub-littoral environments elsewhere. Nematodes were the dominant group, with over 95 % (10 3-104 ind 10 cm-2 ) of the total density, followed by copepods and polychaetes. Highest densities and biomasses were always found at the bay-mouth, followed by the inner-bay and the inner-shelf, while the lowest values occurred at the mid- and outer-shelf. Off Concepción, the meiofauna plays an important role in the energy flux through the benthic sub-system. Indeed, the meiofauna could be converting to biomass and remineralizing in the inner-bay and bay-mouth up to 36 and 45 %, respectively, of the organic carbon reaching the sediments from the water column.

Título traducido de la contribuciónComposition, structure and energy flux of the meiobenthos off central Chile
Idioma originalEspañol
Páginas (desde-hasta)401-415
Número de páginas15
PublicaciónRevista Chilena de Historia Natural
Volumen76
N.º3
EstadoPublicada - sept. 2003
Publicado de forma externa

Palabras clave

  • Central Chile
  • El Niño
  • Energetic flux
  • Meiofauna
  • Secondary production

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