Light environment and Seasonal Dynamics of Microalgae in the Annual Sea Ice at Terra Nova Bay, Ross Sea, Antarctica
We investigated the physical conditions of the Spring pack ice environment at Terra Nova Bay to understand their influence on the structure and physiology of sympagic microalgae. Bio-optical methods were used to study the availability and spectral quality of solar radiation, both inside and undernea...
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2007
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Online Access: | https://digitalcommons.odu.edu/oeas_fac_pubs/280 https://doi.org/10.1017/s0954102007000119 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1291/viewcontent/Lazzara_2007_Light_environment_and_seasonal_dy.pdf |
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ftolddominionuni:oai:digitalcommons.odu.edu:oeas_fac_pubs-1291 2023-12-03T10:13:41+01:00 Light environment and Seasonal Dynamics of Microalgae in the Annual Sea Ice at Terra Nova Bay, Ross Sea, Antarctica Lazzara, L. Nardello, I. Ermanni, C. Mangoni, O. Saggiomo, V. 2007-01-01T08:00:00Z application/pdf https://digitalcommons.odu.edu/oeas_fac_pubs/280 https://doi.org/10.1017/s0954102007000119 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1291/viewcontent/Lazzara_2007_Light_environment_and_seasonal_dy.pdf unknown ODU Digital Commons https://digitalcommons.odu.edu/oeas_fac_pubs/280 doi:10.1017/s0954102007000119 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1291/viewcontent/Lazzara_2007_Light_environment_and_seasonal_dy.pdf Web of Science: "Free full-text from publisher -- gold open access." OES Faculty Publications Bottom ice Diatoms Irradiance Platelet ice Shade adaptation Biogeochemistry Environmental Sciences Marine Biology article 2007 ftolddominionuni https://doi.org/10.1017/s0954102007000119 2023-11-06T19:09:42Z We investigated the physical conditions of the Spring pack ice environment at Terra Nova Bay to understand their influence on the structure and physiology of sympagic microalgae. Bio-optical methods were used to study the availability and spectral quality of solar radiation, both inside and underneath the ice cover. Pack ice thickness was around 2.5 m, with a temperature between -2 and -7°C. On average, only 1.4% of surface PAR penetrated to the bottom ice and less than 0.6% below platelet ice level. Surface UV-B radiation under the bottom ice was 0.2-0.4%. Biomass concentrations up to 2400 mg Chl a m-3, dominated by two species of diatoms (Entomoneis kjellmannii and Nitschia cf. stellata), showed marked spatial and temporal patterns. Maximum values were in the platelet ice during the first half of November, and in the bottom ice two weeks later. Strong shade adaptation characteristics emerged clearly and explained the relevant abundance of microalgae within the sea ice, with specific absorption coefficients (a*) as low as 0.005 m2 (mg Chl a)-1 and the photo-acclimation index (Ek) in the range of in situ irradiance. The biomass specific production values were low, around 0.12-0.13 mg C mg Chl a-1 h-1. The hypothesis suggesting bottom ice colonization by platelet ice microalgae is supported here. Article in Journal/Newspaper Antarc* Antarctica Ross Sea Sea ice Old Dominion University: ODU Digital Commons Ross Sea Terra Nova Bay Antarctic Science 19 1 83 92 |
institution |
Open Polar |
collection |
Old Dominion University: ODU Digital Commons |
op_collection_id |
ftolddominionuni |
language |
unknown |
topic |
Bottom ice Diatoms Irradiance Platelet ice Shade adaptation Biogeochemistry Environmental Sciences Marine Biology |
spellingShingle |
Bottom ice Diatoms Irradiance Platelet ice Shade adaptation Biogeochemistry Environmental Sciences Marine Biology Lazzara, L. Nardello, I. Ermanni, C. Mangoni, O. Saggiomo, V. Light environment and Seasonal Dynamics of Microalgae in the Annual Sea Ice at Terra Nova Bay, Ross Sea, Antarctica |
topic_facet |
Bottom ice Diatoms Irradiance Platelet ice Shade adaptation Biogeochemistry Environmental Sciences Marine Biology |
description |
We investigated the physical conditions of the Spring pack ice environment at Terra Nova Bay to understand their influence on the structure and physiology of sympagic microalgae. Bio-optical methods were used to study the availability and spectral quality of solar radiation, both inside and underneath the ice cover. Pack ice thickness was around 2.5 m, with a temperature between -2 and -7°C. On average, only 1.4% of surface PAR penetrated to the bottom ice and less than 0.6% below platelet ice level. Surface UV-B radiation under the bottom ice was 0.2-0.4%. Biomass concentrations up to 2400 mg Chl a m-3, dominated by two species of diatoms (Entomoneis kjellmannii and Nitschia cf. stellata), showed marked spatial and temporal patterns. Maximum values were in the platelet ice during the first half of November, and in the bottom ice two weeks later. Strong shade adaptation characteristics emerged clearly and explained the relevant abundance of microalgae within the sea ice, with specific absorption coefficients (a*) as low as 0.005 m2 (mg Chl a)-1 and the photo-acclimation index (Ek) in the range of in situ irradiance. The biomass specific production values were low, around 0.12-0.13 mg C mg Chl a-1 h-1. The hypothesis suggesting bottom ice colonization by platelet ice microalgae is supported here. |
format |
Article in Journal/Newspaper |
author |
Lazzara, L. Nardello, I. Ermanni, C. Mangoni, O. Saggiomo, V. |
author_facet |
Lazzara, L. Nardello, I. Ermanni, C. Mangoni, O. Saggiomo, V. |
author_sort |
Lazzara, L. |
title |
Light environment and Seasonal Dynamics of Microalgae in the Annual Sea Ice at Terra Nova Bay, Ross Sea, Antarctica |
title_short |
Light environment and Seasonal Dynamics of Microalgae in the Annual Sea Ice at Terra Nova Bay, Ross Sea, Antarctica |
title_full |
Light environment and Seasonal Dynamics of Microalgae in the Annual Sea Ice at Terra Nova Bay, Ross Sea, Antarctica |
title_fullStr |
Light environment and Seasonal Dynamics of Microalgae in the Annual Sea Ice at Terra Nova Bay, Ross Sea, Antarctica |
title_full_unstemmed |
Light environment and Seasonal Dynamics of Microalgae in the Annual Sea Ice at Terra Nova Bay, Ross Sea, Antarctica |
title_sort |
light environment and seasonal dynamics of microalgae in the annual sea ice at terra nova bay, ross sea, antarctica |
publisher |
ODU Digital Commons |
publishDate |
2007 |
url |
https://digitalcommons.odu.edu/oeas_fac_pubs/280 https://doi.org/10.1017/s0954102007000119 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1291/viewcontent/Lazzara_2007_Light_environment_and_seasonal_dy.pdf |
geographic |
Ross Sea Terra Nova Bay |
geographic_facet |
Ross Sea Terra Nova Bay |
genre |
Antarc* Antarctica Ross Sea Sea ice |
genre_facet |
Antarc* Antarctica Ross Sea Sea ice |
op_source |
OES Faculty Publications |
op_relation |
https://digitalcommons.odu.edu/oeas_fac_pubs/280 doi:10.1017/s0954102007000119 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1291/viewcontent/Lazzara_2007_Light_environment_and_seasonal_dy.pdf |
op_rights |
Web of Science: "Free full-text from publisher -- gold open access." |
op_doi |
https://doi.org/10.1017/s0954102007000119 |
container_title |
Antarctic Science |
container_volume |
19 |
container_issue |
1 |
container_start_page |
83 |
op_container_end_page |
92 |
_version_ |
1784260536049860608 |