4 results on '"planktonic Radiolarian"'
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2. The Horizontal Distribution of Siliceous Planktonic Radiolarian Community in the Eastern Indian Ocean
- Author
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Jun Sun, Sonia Munir, Xiaodong Zhang, Changling Ding, and John Rogers
- Subjects
Chlorophyll a ,lcsh:Hydraulic engineering ,010504 meteorology & atmospheric sciences ,Geography, Planning and Development ,Equator ,acantharia ,RDA analysis ,Aquatic Science ,01 natural sciences ,Biochemistry ,03 medical and health sciences ,chemistry.chemical_compound ,Diversity index ,lcsh:Water supply for domestic and industrial purposes ,lcsh:TC1-978 ,collodaria ,Eastern Indian ocean ,taxopodida ,Dominance (ecology) ,natural sciences ,Transect ,030304 developmental biology ,0105 earth and related environmental sciences ,Water Science and Technology ,0303 health sciences ,lcsh:TD201-500 ,biology ,fungi ,Community structure ,phaeodaria ,Plankton ,biology.organism_classification ,planktonic radiolarian ,polycystinea ,Oceanography ,chemistry ,Acantharia ,horizontal distribution ,Geology - Abstract
The plankton radiolarian community was investigated in the spring season during the two-month cruise &lsquo, Shiyan1&lsquo, (10 April&ndash, 13 May 2014) in the Eastern Indian Ocean. This is the first comprehensive plankton tow study to be carried out from 44 sampling stations across the entire area (80.00°, &ndash, 96.10°, E, 10.08°, N&ndash, 6.00°, S) of the Eastern Indian Ocean. The plankton tow samples were collected from a vertical haul from a depth 200 m to the surface. During the cruise, conductivity&ndash, temperature&ndash, depth (CTD) measurements were taken of temperature, salinity and chlorophyll a from the surface to 200 m depth. Shannon&ndash, Wiener&rsquo, s diversity index (H&rsquo, ) and the dominance index (Y) were used to analyze community structure. There was a total of 168 plankton species, composed of Acantharia, Phaeodaria, Polycystina, Collodaria and Taxopodida (monospecific&mdash, Sticholonche zanclea, Hertwig is the only recognized species). Hence, it included both celestine-based and siliceous organisms, which are also described here for the first time from this region. Total radiolarians ranged from 5 to 5500 ind/m&minus, 3, dominated by co-occurrences of Sphaerozoum punctatum and Stichonche zanclea species at the south-equator zone (SEQ)-transect 80°, E and equator zone (EQ)-transect Lati-0. The possible environmental variables were tested through RDA analysis, although no result was obtained for the full species dataset, the samples from the equatorial transect related strongly to mixed-layer chlorophyll a concentration and those of a north&ndash, south transect to surface silicate concentrations or mixed-layer nitrate were significantly correlated (p <, 0.01) to the radiolarian community. Our results indicate that the silicate and chlorophyll-a concentrations are the two major factors affecting the radiolarian distribution along two of the investigated transects (southern equator and equator) in the study area.
- Published
- 2020
- Full Text
- View/download PDF
3. The Horizontal Distribution of Siliceous Planktonic Radiolarian Community in the Eastern Indian Ocean
- Author
-
Munir, Sonia, Zhang, Xiaodong, Rogers, John, Ding, Changling, Sun, Jun, Munir, Sonia, Zhang, Xiaodong, Rogers, John, Ding, Changling, and Sun, Jun
- Abstract
The plankton radiolarian community was investigated in the spring season during the two-month cruise 'Shiyan1' (10 April-13 May 2014) in the Eastern Indian Ocean. This is the first comprehensive plankton tow study to be carried out from 44 sampling stations across the entire area (80.00 degrees-96.10 degrees E, 10.08 degrees N-6.00 degrees S) of the Eastern Indian Ocean. The plankton tow samples were collected from a vertical haul from a depth 200 m to the surface. During the cruise, conductivity-temperature-depth (CTD) measurements were taken of temperature, salinity and chlorophyll a from the surface to 200 m depth. Shannon-Wiener's diversity index (H') and the dominance index (Y) were used to analyze community structure. There was a total of 168 plankton species, composed of Acantharia, Phaeodaria, Polycystina, Collodaria and Taxopodida (monospecific-Sticholonche zanclea, Hertwig is the only recognized species). Hence, it included both celestine-based and siliceous organisms, which are also described here for the first time from this region. Total radiolarians ranged from 5 to 5500 ind/m(-3), dominated by co-occurrences of Sphaerozoum punctatum and Stichonche zanclea species at the south-equator zone (SEQ)-transect 80 degrees E and equator zone (EQ)-transect Lati-0. The possible environmental variables were tested through RDA analysis; although no result was obtained for the full species dataset, the samples from the equatorial transect related strongly to mixed-layer chlorophyll a concentration and those of a north-south transect to surface silicate concentrations or mixed-layer nitrate were significantly correlated (p < 0.01) to the radiolarian community. Our results indicate that the silicate and chlorophyll-a concentrations are the two major factors affecting the radiolarian distribution along two of the investigated transects (southern equator and equator) in the study area.
- Published
- 2020
4. The First Record and Classification of Planktonic Radiolarian (Phylum Retaria) and Phaeodarian (Phylum Cercozoa) in the Eastern Indian Ocean.
- Author
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Munir, Sonia, Sun, Jun, Morton, Steve L., and Cosmo, Anna Di
- Subjects
OCEAN ,SPECIES diversity ,ELECTRON microscopy ,CLASSIFICATION ,MICROSCOPY - Abstract
Simple Summary: Phylum Retaria and Phylum Cercozoa consists of the siliceous planktonic organisms, commonly referred to as Radiolarians, were investigated from 200 m depth to the surface in the eastern Indian Ocean (80.00°–96.10° E, 10.08° N–6.00° S) during a 2 months cruise (10 April–13 May 2014). Samples collected from 44 locations were analyzed by using both light and electron microscopy. Out of 168 taxa, 60 newly recorded species from the groups i.e., Acantharia, Collodaria, Pheodaria, Taxopodida and Polycystinea were recorded for the first time. Siliceous planktonic species of the phyla Retaria and Cercozoa were investigated from the surface to a 200 m depth around the eastern Indian Ocean (80.00°–96.10° E, 10.08° N–6.00° S) during a 2-month cruise (10 April–13 May 2014). These species are commonly referred to as Radiolarians and are found in all of the world's oceans; however, this is a detailed investigation of the species' diversity in the eastern Indian Ocean. Samples were collected from the eastern Indian Ocean using a plankton towing net during a vertical haul from 44 sampling stations, which resulted in 168 taxa, including 60 species that were newly recorded in the study area. The main purpose of this work was to identify members of the phyla Retaria and Cercozoa and their distribution in the eastern Indian Ocean. The species' morphology, identification, notes, and new geographical records are briefly described. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
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