Composition and vertical distribution of metazoan meiofauna assemblages on the continental shelf off central Chile
Composición y distribución vertical de los ensambles de meiofauna metazoaria en la plataforma continental frente a Chile central
| dc.contributor | Fondo Nacional de Desarrollo Científico y Tecnológico | en-US |
| dc.contributor | Fondo Nacional de Desarrollo Científico y Tecnológico Fondecyt 11121487 | es-ES |
| dc.creator | Soto, Eulogio | |
| dc.creator | Caballero, Williams | |
| dc.creator | Quiroga, Eduardo | |
| dc.date | 2017-02-28 | |
| dc.date.accessioned | 2020-11-05T13:35:07Z | |
| dc.date.available | 2020-11-05T13:35:07Z | |
| dc.identifier | http://lajar.ucv.cl/index.php/rlajar/article/view/vol43-issue5-fulltext-12 | |
| dc.identifier | 10.3856/vol43-issue5-fulltext-12 | |
| dc.identifier.uri | https://revistaschilenas.uchile.cl/handle/2250/158431 | |
| dc.description | A quantitative study of metazoan meiofauna was carried out in Valparaiso Bay (33°S 71°W) which is affected by seasonal hypoxia in central Chile. The contents of bottom water, dissolved oxygen (BWDO), organic carbon, chloroplast pigments and composition of stable carbon isotope (d13C) in the sediment were used as a measure of the contribution of primary production in the water column, which accumulates in the sediment. Meiofauna abundances in the three sampling stations (80-140 m depth) ranged from 2.218 ± 643 to 1.592 ± 148 ind 10 cm-2. Nine upper metazoan meiofauna groups were recorded, with nematodes as the dominant group, contributing with more than 95% of total abundances. The abundance vertical distribution was concentrated in the first layers of sediment in most groups except Acari and nauplii larvae. Canonical correspondence analysis revealed significant correlations (P < 0.05) between the meiofauna abundance and organic content, depth and redox potential from sediments. These results represent a first approach to understanding the ecology of meiofaunal assemblages in the Valparaiso Bay and may be useful as a baseline for future comparisons and descriptions of the ENSO (El Niño Southern Oscillation) and seasonal variations of these unknown benthic communities. | en-US |
| dc.description | A quantitative study of metazoan meiofaunal was carried out at Valparaiso bay (33°S 71°W) which is affected by seasonal hypoxia in central Chile. Bottom water dissolved oxygen (BWDO), sediment organic carbon, sediment-bound chloroplastic pigments and carbon stable isotope composition (d13C) contents were used as measures of the input from water column primary production, which accumulated on the sediment. Meiofaunal abundances at three benthic stations sampled (80 – 130 m depth) ranged from 2.218 ± 643 ind. 10 cm-2 to 1.592 ± 148 ind. 10 cm-2. Nine metazoan meiofaunal taxa were recorded being nematodes the dominant group, contributing with more than 95% of total abundances. Abundance vertical distribution was concentrated at the first sediment layer in the majority of groups with the exception of Acari and Nauplii larvae. We found that the BWDO, total organic carbon (TOC), chlorophyll a (Chla) and chloroplastic pigment equivalent (CPE) decreased with depth, but we did not found significant correlations between meiofauna abundance and sediment parameters. The current results represent a first approach to knowledge of soft-bottom meiofaunal assemblage’s ecology at Valparaiso bay and may be useful as a baseline for future comparisons and descriptions of ENSO (El Niño Southern Oscillation) conditions and seasonal variations of these unknown benthic communities | es-ES |
| dc.format | application/pdf | |
| dc.language | eng | |
| dc.publisher | Pontificia Universidad Católica de Valparaíso | en-US |
| dc.relation | http://lajar.ucv.cl/index.php/rlajar/article/view/vol43-issue5-fulltext-12/288 | |
| dc.source | Latin American Journal of Aquatic Research; Vol 43, No 5 (2015); 922-935 | en-US |
| dc.source | Plataforma para envío de artículos - Latin American Journal of Aquatic Research; Vol 43, No 5 (2015); 922-935 | es-ES |
| dc.source | 0718-560X | |
| dc.source | 0718-560X | |
| dc.subject | meiofauna; nematodes; abundance; sediment; Valparaiso Bay; southeastern Pacific | en-US |
| dc.subject | Abundance; nematodes; sediment parameters; Valparaiso bay; Southeastern Pacific Ocean | es-ES |
| dc.title | Composition and vertical distribution of metazoan meiofauna assemblages on the continental shelf off central Chile | en-US |
| dc.title | Composición y distribución vertical de los ensambles de meiofauna metazoaria en la plataforma continental frente a Chile central | es-ES |
| dc.type | info:eu-repo/semantics/article | |
| dc.type | info:eu-repo/semantics/publishedVersion | |
| dc.type | en-US | |
| dc.type | es-ES |