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

Translated title of the contribution: Composition, structure and energy flux of the meiobenthos off central Chile

Javier Sellanes, Carlos Neira, EDUARDO JOEL QUIROGA JAMETT

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

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 -10 4 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.

Translated title of the contributionComposition, structure and energy flux of the meiobenthos off central Chile
Original languageSpanish
Pages (from-to)401-415
Number of pages15
JournalRevista Chilena de Historia Natural
Volume76
Issue number3
StatePublished - 1 Sep 2003

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