The role of platelet ice microalgae in seeding phytoplankton blooms in Terra Nova Bay (Ross Sea, Antarctica): a mesocosm experiment.
The aim of this study was to assess the role of platelet ice microalgal communities in seeding pelagic blooms. Nutrient dynamics, microalgal biomass, photosynthetic parameters, cell densities and species succession were studied in two mesocosm experiments, designed to simulate the transition of micr...
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2009
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ftunivnapoliiris:oai:www.iris.unina.it:11588/362541 2024-06-23T07:47:16+00:00 The role of platelet ice microalgae in seeding phytoplankton blooms in Terra Nova Bay (Ross Sea, Antarctica): a mesocosm experiment. MANGONI, OLGA M. SAGGIOMO M. MODIGH G. CATALANO A. ZINGONE V. SAGGIOMO Mangoni, Olga M., Saggiomo M., Modigh G., Catalano A., Zingone V., Saggiomo 2009 STAMPA http://hdl.handle.net/11588/362541 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000263389000001 volume:32 firstpage:311 lastpage:323 numberofpages:12 journal:POLAR BIOLOGY http://hdl.handle.net/11588/362541 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-60449096172 info:eu-repo/semantics/closedAccess info:eu-repo/semantics/article 2009 ftunivnapoliiris 2024-06-10T14:58:47Z The aim of this study was to assess the role of platelet ice microalgal communities in seeding pelagic blooms. Nutrient dynamics, microalgal biomass, photosynthetic parameters, cell densities and species succession were studied in two mesocosm experiments, designed to simulate the transition of microalgal communities from platelet ice habitat to pelagic conditions. The microalgal assemblages were dominated by diatoms, 70% of which were benthic species such as Amphiprora kufferathii, Nitzschia stellata, and Berkeleya adeliensis. Photoacclimation of benthic species was inadequate also at relatively low irradiances. Exceptional growth capacity at different light levels was observed for pelagic species such as Fragilariopsis cylindrus and Chaetoceros spp. which may be important in seeding blooms at ice breakup. Fragilariopsis cylindrus showed high growth rates both at 65 and 10% of incident light and in nutrient replete as well as in nutrient depleted conditions. Five days after inoculation, phytoplankton biomass increased and nutrient concentrations decreased in both light conditions. Nutrient uptake rates were up to 9.10 lmol L-1 d-1 of TIN in the high light tank and 6.18 lmol L-1 d-1 in the low light tank and nutrient depletion in the high light tank occurred 3 days prior to depletion in the low light tank. At nutrient depletion, biomass concentrations were similar in both tanks, 30 and 34 lg Chla L-1. Article in Journal/Newspaper Antarc* Antarctica Ross Sea IRIS Università degli Studi di Napoli Federico II Ross Sea Terra Nova Bay |
institution |
Open Polar |
collection |
IRIS Università degli Studi di Napoli Federico II |
op_collection_id |
ftunivnapoliiris |
language |
English |
description |
The aim of this study was to assess the role of platelet ice microalgal communities in seeding pelagic blooms. Nutrient dynamics, microalgal biomass, photosynthetic parameters, cell densities and species succession were studied in two mesocosm experiments, designed to simulate the transition of microalgal communities from platelet ice habitat to pelagic conditions. The microalgal assemblages were dominated by diatoms, 70% of which were benthic species such as Amphiprora kufferathii, Nitzschia stellata, and Berkeleya adeliensis. Photoacclimation of benthic species was inadequate also at relatively low irradiances. Exceptional growth capacity at different light levels was observed for pelagic species such as Fragilariopsis cylindrus and Chaetoceros spp. which may be important in seeding blooms at ice breakup. Fragilariopsis cylindrus showed high growth rates both at 65 and 10% of incident light and in nutrient replete as well as in nutrient depleted conditions. Five days after inoculation, phytoplankton biomass increased and nutrient concentrations decreased in both light conditions. Nutrient uptake rates were up to 9.10 lmol L-1 d-1 of TIN in the high light tank and 6.18 lmol L-1 d-1 in the low light tank and nutrient depletion in the high light tank occurred 3 days prior to depletion in the low light tank. At nutrient depletion, biomass concentrations were similar in both tanks, 30 and 34 lg Chla L-1. |
author2 |
Mangoni, Olga M., Saggiomo M., Modigh G., Catalano A., Zingone V., Saggiomo |
format |
Article in Journal/Newspaper |
author |
MANGONI, OLGA M. SAGGIOMO M. MODIGH G. CATALANO A. ZINGONE V. SAGGIOMO |
spellingShingle |
MANGONI, OLGA M. SAGGIOMO M. MODIGH G. CATALANO A. ZINGONE V. SAGGIOMO The role of platelet ice microalgae in seeding phytoplankton blooms in Terra Nova Bay (Ross Sea, Antarctica): a mesocosm experiment. |
author_facet |
MANGONI, OLGA M. SAGGIOMO M. MODIGH G. CATALANO A. ZINGONE V. SAGGIOMO |
author_sort |
MANGONI, OLGA |
title |
The role of platelet ice microalgae in seeding phytoplankton blooms in Terra Nova Bay (Ross Sea, Antarctica): a mesocosm experiment. |
title_short |
The role of platelet ice microalgae in seeding phytoplankton blooms in Terra Nova Bay (Ross Sea, Antarctica): a mesocosm experiment. |
title_full |
The role of platelet ice microalgae in seeding phytoplankton blooms in Terra Nova Bay (Ross Sea, Antarctica): a mesocosm experiment. |
title_fullStr |
The role of platelet ice microalgae in seeding phytoplankton blooms in Terra Nova Bay (Ross Sea, Antarctica): a mesocosm experiment. |
title_full_unstemmed |
The role of platelet ice microalgae in seeding phytoplankton blooms in Terra Nova Bay (Ross Sea, Antarctica): a mesocosm experiment. |
title_sort |
role of platelet ice microalgae in seeding phytoplankton blooms in terra nova bay (ross sea, antarctica): a mesocosm experiment. |
publishDate |
2009 |
url |
http://hdl.handle.net/11588/362541 |
geographic |
Ross Sea Terra Nova Bay |
geographic_facet |
Ross Sea Terra Nova Bay |
genre |
Antarc* Antarctica Ross Sea |
genre_facet |
Antarc* Antarctica Ross Sea |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000263389000001 volume:32 firstpage:311 lastpage:323 numberofpages:12 journal:POLAR BIOLOGY http://hdl.handle.net/11588/362541 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-60449096172 |
op_rights |
info:eu-repo/semantics/closedAccess |
_version_ |
1802651351042228224 |