Distribution of phytoplankton in relation to its physiological state around the South Shetland Islands Antarctica
Trabajo presentado en el III Simposio Internacional en Ciencias del Mar (ISMS12), celebrado en Cádiz del 24 al 26 de enero de 2012. The distribution and composition of the phytoplankton assemblages, around the South Shetland Islands (SSI, Antarctica), was analysed during January 2010 in relation wit...
Main Authors: | , , , , , |
---|---|
Format: | Still Image |
Language: | unknown |
Published: |
2012
|
Subjects: | |
Online Access: | http://hdl.handle.net/10261/104334 |
id |
ftcsic:oai:digital.csic.es:10261/104334 |
---|---|
record_format |
openpolar |
spelling |
ftcsic:oai:digital.csic.es:10261/104334 2024-02-11T09:55:57+01:00 Distribution of phytoplankton in relation to its physiological state around the South Shetland Islands Antarctica Distribución de fitoplancton en relación a su estado fisiológico alrededor de las Islas South Shetland (Antártida) García Muñoz, Cristina Sobrino, Cristina Lubián, Luis M. García, Carlos M. Martínez García, S. Sangrà, Pablo 2012-01 http://hdl.handle.net/10261/104334 unknown III Simposio Internacional en Ciencias del Mar (2012) http://hdl.handle.net/10261/104334 none Fitoplancton Islas South Shetland Nutrients Fv/Fm Nutrientes Phytoplankton Irrandianci Irradiance South Shetland Islands póster de congreso http://purl.org/coar/resource_type/c_6670 2012 ftcsic 2024-01-16T10:02:15Z Trabajo presentado en el III Simposio Internacional en Ciencias del Mar (ISMS12), celebrado en Cádiz del 24 al 26 de enero de 2012. The distribution and composition of the phytoplankton assemblages, around the South Shetland Islands (SSI, Antarctica), was analysed during January 2010 in relation with the physicochemical variables and the maximum photosynthetic efficiency (Fv/Fm) measured with a Fast repetition Rate fluorometer. Nanophytoplankton (2 - 20 μm) was the most abundant phytoplankton fraction with significant differences among waters from the Drake Passage, the SSI shelf, the Bransfield Strait, and the Antarctic Sound. A latitudinal pattern in Fv/Fm along a transect that crossed the SSI occurred, ranging from 0.17 to 0.53, indicating that cells were in good physiological conditions in the area surrounding the SSI and the Bransfield Strait but start to get stressed at the stations located further north where the smaller phytoplankton group (‘Nano small’, 2.8 μm mean ESD) was detected. A deeper examination carried out according to the sampling time and the vertical depth profiles detected surface photoinhibition processes and regional trends. At surface significant differences were found among stations sampled at different day time, irradiance and silicate concentrations. The most abundant phytoplankton group in surface waters was that of small diatoms (‘Nano medium’, 5.2 μm mean ESD), probably due to a better photoadaptation against the rest of the groups. At the Depth of the Fluorescence Maximun (DFM), phytoplankton showed homogeneous values of Fv/Fm close to the maximum, regardless time of the day and group. In conclusion, the influence of the water masses together with irradiance and the position in the north-south gradient of limiting nutrients were driving the physiological state of the different phytoplankton groups around the SSI. Peer Reviewed Still Image Antarc* Antarctic Antarctica Antártida Bransfield Strait Drake Passage South Shetland Islands Digital.CSIC (Spanish National Research Council) Antarctic Antarctic Sound ENVELOPE(-56.500,-56.500,-63.500,-63.500) Bransfield Strait Drake Passage South Shetland Islands The Antarctic |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
unknown |
topic |
Fitoplancton Islas South Shetland Nutrients Fv/Fm Nutrientes Phytoplankton Irrandianci Irradiance South Shetland Islands |
spellingShingle |
Fitoplancton Islas South Shetland Nutrients Fv/Fm Nutrientes Phytoplankton Irrandianci Irradiance South Shetland Islands García Muñoz, Cristina Sobrino, Cristina Lubián, Luis M. García, Carlos M. Martínez García, S. Sangrà, Pablo Distribution of phytoplankton in relation to its physiological state around the South Shetland Islands Antarctica |
topic_facet |
Fitoplancton Islas South Shetland Nutrients Fv/Fm Nutrientes Phytoplankton Irrandianci Irradiance South Shetland Islands |
description |
Trabajo presentado en el III Simposio Internacional en Ciencias del Mar (ISMS12), celebrado en Cádiz del 24 al 26 de enero de 2012. The distribution and composition of the phytoplankton assemblages, around the South Shetland Islands (SSI, Antarctica), was analysed during January 2010 in relation with the physicochemical variables and the maximum photosynthetic efficiency (Fv/Fm) measured with a Fast repetition Rate fluorometer. Nanophytoplankton (2 - 20 μm) was the most abundant phytoplankton fraction with significant differences among waters from the Drake Passage, the SSI shelf, the Bransfield Strait, and the Antarctic Sound. A latitudinal pattern in Fv/Fm along a transect that crossed the SSI occurred, ranging from 0.17 to 0.53, indicating that cells were in good physiological conditions in the area surrounding the SSI and the Bransfield Strait but start to get stressed at the stations located further north where the smaller phytoplankton group (‘Nano small’, 2.8 μm mean ESD) was detected. A deeper examination carried out according to the sampling time and the vertical depth profiles detected surface photoinhibition processes and regional trends. At surface significant differences were found among stations sampled at different day time, irradiance and silicate concentrations. The most abundant phytoplankton group in surface waters was that of small diatoms (‘Nano medium’, 5.2 μm mean ESD), probably due to a better photoadaptation against the rest of the groups. At the Depth of the Fluorescence Maximun (DFM), phytoplankton showed homogeneous values of Fv/Fm close to the maximum, regardless time of the day and group. In conclusion, the influence of the water masses together with irradiance and the position in the north-south gradient of limiting nutrients were driving the physiological state of the different phytoplankton groups around the SSI. Peer Reviewed |
format |
Still Image |
author |
García Muñoz, Cristina Sobrino, Cristina Lubián, Luis M. García, Carlos M. Martínez García, S. Sangrà, Pablo |
author_facet |
García Muñoz, Cristina Sobrino, Cristina Lubián, Luis M. García, Carlos M. Martínez García, S. Sangrà, Pablo |
author_sort |
García Muñoz, Cristina |
title |
Distribution of phytoplankton in relation to its physiological state around the South Shetland Islands Antarctica |
title_short |
Distribution of phytoplankton in relation to its physiological state around the South Shetland Islands Antarctica |
title_full |
Distribution of phytoplankton in relation to its physiological state around the South Shetland Islands Antarctica |
title_fullStr |
Distribution of phytoplankton in relation to its physiological state around the South Shetland Islands Antarctica |
title_full_unstemmed |
Distribution of phytoplankton in relation to its physiological state around the South Shetland Islands Antarctica |
title_sort |
distribution of phytoplankton in relation to its physiological state around the south shetland islands antarctica |
publishDate |
2012 |
url |
http://hdl.handle.net/10261/104334 |
long_lat |
ENVELOPE(-56.500,-56.500,-63.500,-63.500) |
geographic |
Antarctic Antarctic Sound Bransfield Strait Drake Passage South Shetland Islands The Antarctic |
geographic_facet |
Antarctic Antarctic Sound Bransfield Strait Drake Passage South Shetland Islands The Antarctic |
genre |
Antarc* Antarctic Antarctica Antártida Bransfield Strait Drake Passage South Shetland Islands |
genre_facet |
Antarc* Antarctic Antarctica Antártida Bransfield Strait Drake Passage South Shetland Islands |
op_relation |
III Simposio Internacional en Ciencias del Mar (2012) http://hdl.handle.net/10261/104334 |
op_rights |
none |
_version_ |
1790599711031296000 |