The University of Southampton
University of Southampton Institutional Repository

Seasonal progression of diatom assemblages in surface waters of Ryder Bay, Antarctica

Seasonal progression of diatom assemblages in surface waters of Ryder Bay, Antarctica
Seasonal progression of diatom assemblages in surface waters of Ryder Bay, Antarctica
Phytoplankton assemblages from seasonally sea-ice covered Ryder Bay (Adelaide Island, Antarctica) were studied over three austral summers (2004–2007), to link sea-ice variability and environmental conditions with algal speciation. Typical of near-shore Antarctic waters, biomass was dominated by large diatoms, although the prymnesiophyte Phaeocystis antarctica was numerically dominant. Although there was considerable interannual variability between main diatom species, high biomass of certain species or species groups corresponded consistently to certain phases of seasonal progression. We present the first documentation of an extensive bloom of the late-season diatom Proboscia inermis in February 2006, accounting for over 90% of diatom biomass. At this time, water column stratification and nutrient drawdown were high relative to other periods of the study, although carbon export was relatively low. Melt water flux in this region promotes well-stratified surface waters and high chlorophyll levels, but not necessarily concurrent increases in export production relative to seasons with lower freshwater inputs.
Coastal Antarctic, Diatoms, Phytoplankton, Proboscia inermis, Sea-ice, Seasonality
0722-4060
13-29
Annett, Amber L.
de404d72-7e90-4dbd-884a-1df813808276
Carson, Damien S.
c15a877f-527f-458a-91c1-662a889ccab5
Crosta, Xavier
3ee8d28c-87aa-42e9-9f5e-218e81fa53f3
Clarke, Andrew
b54fba97-b95a-4a17-86d6-c2bb0f1d10e3
Ganeshram, Raja S.
108fdc69-5502-4b6f-922f-dd12b398e267
Annett, Amber L.
de404d72-7e90-4dbd-884a-1df813808276
Carson, Damien S.
c15a877f-527f-458a-91c1-662a889ccab5
Crosta, Xavier
3ee8d28c-87aa-42e9-9f5e-218e81fa53f3
Clarke, Andrew
b54fba97-b95a-4a17-86d6-c2bb0f1d10e3
Ganeshram, Raja S.
108fdc69-5502-4b6f-922f-dd12b398e267

Annett, Amber L., Carson, Damien S., Crosta, Xavier, Clarke, Andrew and Ganeshram, Raja S. (2010) Seasonal progression of diatom assemblages in surface waters of Ryder Bay, Antarctica. Polar Biology, 33 (1), 13-29. (doi:10.1007/s00300-009-0681-7).

Record type: Article

Abstract

Phytoplankton assemblages from seasonally sea-ice covered Ryder Bay (Adelaide Island, Antarctica) were studied over three austral summers (2004–2007), to link sea-ice variability and environmental conditions with algal speciation. Typical of near-shore Antarctic waters, biomass was dominated by large diatoms, although the prymnesiophyte Phaeocystis antarctica was numerically dominant. Although there was considerable interannual variability between main diatom species, high biomass of certain species or species groups corresponded consistently to certain phases of seasonal progression. We present the first documentation of an extensive bloom of the late-season diatom Proboscia inermis in February 2006, accounting for over 90% of diatom biomass. At this time, water column stratification and nutrient drawdown were high relative to other periods of the study, although carbon export was relatively low. Melt water flux in this region promotes well-stratified surface waters and high chlorophyll levels, but not necessarily concurrent increases in export production relative to seasons with lower freshwater inputs.

Text
Annett et al. - 2010 - Seasonal progression of diatom assemblages in surface waters of Ryder Bay, Antarctica
Restricted to Repository staff only
Request a copy

More information

Published date: 2010
Keywords: Coastal Antarctic, Diatoms, Phytoplankton, Proboscia inermis, Sea-ice, Seasonality

Identifiers

Local EPrints ID: 415788
URI: http://eprints.soton.ac.uk/id/eprint/415788
ISSN: 0722-4060
PURE UUID: b83bc700-708f-434f-89f6-bfda77eec6fa
ORCID for Amber L. Annett: ORCID iD orcid.org/0000-0002-3730-2438

Catalogue record

Date deposited: 24 Nov 2017 17:30
Last modified: 17 Dec 2019 01:27

Export record

Altmetrics

Contributors

Author: Amber L. Annett ORCID iD
Author: Damien S. Carson
Author: Xavier Crosta
Author: Andrew Clarke
Author: Raja S. Ganeshram

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×