Data/hora: 07/06/2024 08:09:35

Provedor de dados: | 5
País: | France
Título: | Particle flux characterisation and sedimentation patterns of protistan plankton during the iron fertilisation experiment LOHAFEX in the Southern Ocean
Autores: | Ebersbach, Friederike; Assmy, Philipp; Martin, Patrick; Schulz, Isabelle; Wolzenburg, Sina; Noethig, Eva-maria.
Data: | 2014-07
Ano: | 2014
Palavras-chave: | Nano- and picoplankton; Export flux; Iron fertilisation; Protists; Sediment trap; Southern Ocean.
Resumo: | The taxonomic composition and types of particles comprising the downward particle flux were examined during the mesoscale artificial iron fertilisation experiment LOHAFEX. The experiment was conducted in low-silicate waters of the Atlantic Sector of the Southern Ocean during austral summer (January-March 2009), and induced a bloom dominated by small flagellates. Downward particle flux was low throughout the experiment, and not enhanced by addition of iron; neutrally buoyant sediment traps contained mostly faecal pellets and faecal material apparently reprocessed by mesozooplankton. TEP fluxes were low, &lt;= 5 mg GX eq. m(-2) d(-1), and a few phytodetrital aggregates were found in the sediment traps. Only a few per cent of the POC flux was found in the traps consisting of intact protist plankton, although remains of taxa with hard body parts (diatoms, tintinnids, thecate dinoflagellates and foraminifera) were numerous, far more so than intact specimens of these taxa. Nevertheless, many small flagellates and coccoid cells, belonging to the pico- and nanoplankton, were found in the traps, and these small, soft-bodied cells probably contributed the majority of downward POC flux via mesozooplankton grazing and faecal pellet export. TEP likely played an important role by aggregating these small cells, and making them more readily available to mesozooplankton grazers.
Tipo: | Text
Idioma: | Inglês

Identificador:

https://archimer.ifremer.fr/doc/00290/40121/39348.pdf

https://archimer.ifremer.fr/doc/00290/40121/39349.zip

https://archimer.ifremer.fr/doc/00290/40121/39350.zip

https://archimer.ifremer.fr/doc/00290/40121/39351.docx

https://archimer.ifremer.fr/doc/00290/40121/39352.docx

https://archimer.ifremer.fr/doc/00290/40121/39353.docx

https://archimer.ifremer.fr/doc/00290/40121/39354.docx

DOI:10.1016/j.dsr.2014.04.007

https://archimer.ifremer.fr/doc/00290/40121/

Editor: | Pergamon-elsevier Science Ltd
Formato: | application/pdf
Fonte: | Deep-sea Research Part I-oceanographic Research Papers (0967-0637) (Pergamon-elsevier Science Ltd), 2014-07 , Vol. 89 , P. 94-103

Fonte:

2014 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/)

info:eu-repo/semantics/openAccess

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