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dc.date.accessioned 2019-11-05T13:51:23Z
dc.date.available 2019-11-05T13:51:23Z
dc.date.issued 2003
dc.identifier.uri http://sedici.unlp.edu.ar/handle/10915/84915
dc.description.abstract We describe the distribution of phytoplanktonic community composition and biomass from the Western Antarctic Peninsula coast (between 64° and 68° S) using 2 analytical techniques: microscopy and HPLC of photosynthetic pigments. Phytoplankton biomass was estimated as chlorophyll a (chl a) by HPLC and chemotaxonomic quantification of microalgae biomass was performed by multiple regression analysis of pigment concentrations. For the estimation of chl a: diagnostic pigment ratios, it was found of primary importance to differentiate between phytoplankton assemblages within the study area. Three assemblages were differentiated according to their total standing stock and analyzed independently. Phytoplankton biomass was also estimated as carbon (C) concentration by microscopic analysis of cell abundance and biovolumes. Microscopy and chemotaxonomy give a high level of agreement for phytoplankton characterization, showing an on/offshore gradient, with high diatom and cryptophyte biomass in coastal waters, and a mixed assemblage with low biomass in open waters. This gradient was not observed in total cell abundance, indicating that the biomass gradient is controlled by cell size. Microscopy also showed shifts in diatom species throughout the area. C and chl a biomass estimates for the individual microalgae groups were strongly correlated for cryptophytes, chlorophytes and most diatoms, but did poorly for dinoflagellates, prymnesiophytes and chrysophytes. From this study, we conclude that both microscopy and chemotaxonomy can be used to accurately characterize phytoplankton assemblages, but some limitations are present in both techniques. Based on phytoplankton C concentrations, we estimated an average in situ growth rate of 0.28 d-1. In situ cell C:chl a ratios had high variability (from 40 to 220) and were non-linearly related to sample growth rates. Significant differences were found among average C:chl a ratios of low (<1 μg chl a 1-1) and high biomass communities (>1 μg chl a l-1), with values of 112 and 74 μg C μg-1 chl a, respectively. In addition, our results support the hypothesis that C quotas of diatoms and other microalgae do not differ greatly from each other, as previously believed. en
dc.format.extent 27-42 es
dc.language en es
dc.subject Chemotaxonomy es
dc.subject Microscopy es
dc.subject Photosynthetic pigments es
dc.subject Phytoplankton composition es
dc.subject Western Antarctic Peninsula es
dc.title Composition and biomass of phytoplankton assemblages in coastal Antarctic waters: A comparison of chemotaxonomic and microscopic analyses en
dc.type Articulo es
sedici.identifier.other doi:10.3354/meps247027 es
sedici.identifier.other eid:2-s2.0-0037418134 es
sedici.identifier.issn 0171-8630 es
sedici.creator.person Garibotti, Irene A. es
sedici.creator.person Vernet, María es
sedici.creator.person Kozlowski, Wendy A. es
sedici.creator.person Ferrario, Martha Elba es
sedici.subject.materias Ciencias Naturales es
sedici.description.fulltext true es
mods.originInfo.place Facultad de Ciencias Naturales y Museo es
sedici.subtype Articulo es
sedici.rights.license Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
sedici.rights.uri http://creativecommons.org/licenses/by-nc-sa/4.0/
sedici.description.peerReview peer-review es
sedici.relation.journalTitle Marine Ecology Progress Series es
sedici.relation.journalVolumeAndIssue vol. 247 es
sedici.rights.sherpa * RoMEO: verde* Pre-print del autor: can* Post-print del autor: can* Versión de editor/PDF:restricted* Condiciones:>>Author's pre-print on author's personal website, institutional website or institutional repository>>Author's post-print on author's personal website or institutional website>>Author's post-print on institutional repository after 12 months embargo>>Authors covered by funding agency rules, may post author's post-print in PubMed Central after a 6 months embargo>>If mandated by a funding agency or institution, the author's post-print may be deposited in institutional repository before 12 months, as long addendum is submitted>>Publisher's version/PDF may be used after 5 years embargo>>Deben reconocerse el copyright y la fuente editorial>>Reviewed 31/01/2014* Link a Sherpa: http://sherpa.ac.uk/romeo/issn/0171-8630/es/


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Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) Excepto donde se diga explícitamente, este item se publica bajo la siguiente licencia Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)