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Título: | Holo-heterococcolithophore life cycles: ecological implications |
Autor: | Cros, Lluïsa CSIC ORCID ; Estrada, Marta CSIC ORCID | Palabras clave: | Holococcolithophore prevalence index Haploid-diploid life cycles Coccolithophores NW Mediterranean |
Fecha de publicación: | oct-2013 | Editor: | Inter Research | Citación: | Marine Ecology Progress Series 492: 57-68 (2013) | Resumen: | Many coccolithophores have complex life cycles with haploid and diploid stages bearing structurally different coccolith types (holococcoliths and heterococcoliths, respectively). Laboratory studies suggest that holo- and heterococcolithophores may occupy distinct ecological niches, but the potential ecological implications of the existence of haploid and diploid stages are poorly known. We present here a study of holo- and heterococcolithophore distributions in the Catalano-Balearic Sea, during 2 cruises (MESO-96, from 18 June to 3 July, and FRONTS-96, from 16 to 21 September) that covered 2 intervals of the stratification period of 1996. We define a holococcolithophore prevalence index (HOLP index), calculated for each coccolithophore-containing sample, as the percent ratio between the number of holococcolithophores and the total number of holo- and heterococcolithophores belonging to families with alternation of holo- and heterococcolithophore life stages (coccolithophores having HOL-HET life cycles; Total_HHLC). In both cruises, the distribution of holo- and heterococcolithophores and the HOLP index indicated a preference of the holococcolithophores for shallower waters and of the heteroccolithophores for deeper layers. This segregation may be linked to a differentiation of ecological niches, with the haploid holococcolithophores occupying the more oligotrophic upper layers and the diploid heterococcolithophores inhabiting relatively rich deeper waters | Descripción: | 12 pages, 7 figures, 3 tables, supplementary material https://doi.org/10.3354/meps10473 | Versión del editor: | https://doi.org/10.3354/meps10473 | URI: | http://hdl.handle.net/10261/85643 | DOI: | 10.3354/meps10473 | ISSN: | 0171-8630 | E-ISSN: | 1616-1599 |
Aparece en las colecciones: | (ICM) Artículos |
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Cros_et_al_2013.pdf | 887,38 kB | Adobe PDF | Visualizar/Abrir |
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