Physical and biological processes at the Subtropical Convergence in the South-west Indian Ocean

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dc.contributor.authorAnsorge, I J
dc.contributor.authorFroneman, P W
dc.contributor.authorRichoux, N
dc.contributor.authorBlake, J
dc.contributor.authorDaly, R
dc.contributor.authorSterley, J
dc.contributor.authorHart, N
dc.contributor.authorMostert, B
dc.contributor.authorHeyns, E
dc.contributor.authorSheppard, J
dc.contributor.authorKuyper, B
dc.contributor.authorGeorge, C
dc.contributor.authorHoward, J
dc.contributor.authorMustafa, E
dc.contributor.authorPey, F
dc.contributor.authorLutjeharms, J R E
dc.date.accessioned2016-01-19T06:42:36Z
dc.date.available2016-01-19T06:42:36Z
dc.date.issued2007
dc.date.updated2016-01-18T13:10:26Z
dc.description.abstractA detailed hydrographic and biological survey was conducted in the region of the Subtropical Convergence in the Indian sector of the Southern Ocean in April 2007. Hydrographic data revealed that the subsurface expression of the Subtropical Convergence (at 200 m), marked by the 10°C isotherm, appeared to meander considerably between 41°S and 42°15'S. Total surface chlorophyll-a concentration was low and ranged from 0.03 to 0.42 μg l-1 and was always dominated by the pico- (<2 μm) and nano-(2-120 μm) size classes, which contributed between 81% and 93% of the total pigment. The total chlorophyll-a integrated over the top 150 m of the water column showed no distinct spatial trends, and ranged from 12.8 to 40.1 mg chl-a m2. There were no significant correlations between the total integrated chlorophyll-a concentration and temperature and salinity (P > 0.05). The Zooplankton community was dominated, numerically and by biomass, by mesozooplankton comprising mainly copepods of the genera, Oithona, Paraeuchaeta, Pleuromamma, Calanus and Clausocalanus. An exception was recorded at those stations in the region of the front where the tunicate, Salpa thompsoni, dominated the total Zooplankton biomass.en_ZA
dc.identifier.apacitationAnsorge, I. J., Froneman, P. W., Richoux, N., Blake, J., Daly, R., Sterley, J., ... Lutjeharms, J. R. E. (2007). Physical and biological processes at the Subtropical Convergence in the South-west Indian Ocean. <i>South African Journal of Science</i>, http://hdl.handle.net/11427/16422en_ZA
dc.identifier.chicagocitationAnsorge, I J, P W Froneman, N Richoux, J Blake, R Daly, J Sterley, N Hart, et al "Physical and biological processes at the Subtropical Convergence in the South-west Indian Ocean." <i>South African Journal of Science</i> (2007) http://hdl.handle.net/11427/16422en_ZA
dc.identifier.citationFroneman, P. W., Ansorge, I. J., Richoux, N., Blake, J., Daly, R., Sterley, J., ... & Hart, N. (2007). Physical and biological processes at the Subtropical Convergence in the South-west Indian Ocean. South African Journal of Science, 103(5-6), 193.en_ZA
dc.identifier.issn0038-2353en_ZA
dc.identifier.ris TY - Journal Article AU - Ansorge, I J AU - Froneman, P W AU - Richoux, N AU - Blake, J AU - Daly, R AU - Sterley, J AU - Hart, N AU - Mostert, B AU - Heyns, E AU - Sheppard, J AU - Kuyper, B AU - George, C AU - Howard, J AU - Mustafa, E AU - Pey, F AU - Lutjeharms, J R E AB - A detailed hydrographic and biological survey was conducted in the region of the Subtropical Convergence in the Indian sector of the Southern Ocean in April 2007. Hydrographic data revealed that the subsurface expression of the Subtropical Convergence (at 200 m), marked by the 10°C isotherm, appeared to meander considerably between 41°S and 42°15'S. Total surface chlorophyll-a concentration was low and ranged from 0.03 to 0.42 μg l-1 and was always dominated by the pico- (<2 μm) and nano-(2-120 μm) size classes, which contributed between 81% and 93% of the total pigment. The total chlorophyll-a integrated over the top 150 m of the water column showed no distinct spatial trends, and ranged from 12.8 to 40.1 mg chl-a m2. There were no significant correlations between the total integrated chlorophyll-a concentration and temperature and salinity (P > 0.05). The Zooplankton community was dominated, numerically and by biomass, by mesozooplankton comprising mainly copepods of the genera, Oithona, Paraeuchaeta, Pleuromamma, Calanus and Clausocalanus. An exception was recorded at those stations in the region of the front where the tunicate, Salpa thompsoni, dominated the total Zooplankton biomass. DA - 2007 DB - OpenUCT DP - University of Cape Town J1 - South African Journal of Science LK - https://open.uct.ac.za PB - University of Cape Town PY - 2007 SM - 0038-2353 T1 - Physical and biological processes at the Subtropical Convergence in the South-west Indian Ocean TI - Physical and biological processes at the Subtropical Convergence in the South-west Indian Ocean UR - http://hdl.handle.net/11427/16422 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/16422
dc.identifier.vancouvercitationAnsorge IJ, Froneman PW, Richoux N, Blake J, Daly R, Sterley J, et al. Physical and biological processes at the Subtropical Convergence in the South-west Indian Ocean. South African Journal of Science. 2007; http://hdl.handle.net/11427/16422.en_ZA
dc.languageengen_ZA
dc.publisherAcademy of Science of South Africaen_ZA
dc.publisher.departmentDepartment of Oceanographyen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.rightsCreative Commons Attribution 4.0 International (CC BY 4.0)*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en_ZA
dc.sourceSouth African Journal of Scienceen_ZA
dc.source.urihttp://www.sajs.co.za/
dc.titlePhysical and biological processes at the Subtropical Convergence in the South-west Indian Oceanen_ZA
dc.typeJournal Articleen_ZA
uct.subject.keywordssubtropical convergenceen_ZA
uct.subject.keywordsSouth-west Indian Oceanen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceArticleen_ZA
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