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Deregibus, Dolores; Quartino, Maria Liliana; Campana, Gabriela L; Momo, Fernando; Wiencke, Christian; Zacher, Katharina (2016): Physical oceanography in Potter Cove during 2011 to 2013. PANGAEA, https://doi.org/10.1594/PANGAEA.869350, Supplement to: Deregibus, D et al. (2016): Photosynthetic light requirements and vertical distribution of macroalgae in newly ice-free areas in Potter Cove, South Shetland Islands, Antarctica. Polar Biology, 39(1), 153-166, https://doi.org/10.1007/s00300-015-1679-y

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Abstract:
In Potter Cove, Antarctica, newly ice-free areas appeared due to glacial retreat. Simultaneously, the inflow of sediment increased, reducing underwater photosynthetically active radiation (PAR, 400-700 nm). The aim of this study was to determine the photosynthetic characteristics of two macroalgal species colonizing three newly ice-free areas, A1, A2 and A3, with increasing degree of glacial influence from A1 to A3. Turbidity, salinity and temperature were measured, and light attenuation coefficients (Kd) calculated and considered as a proxy for glacial sediment input. The lower depth distribution of the red alga Palmaria decipiens and the brown alga Himantothallus grandifolius was 10 m in A3, 20 m in A2 and 30 m in A1. Both species were then collected, at 5 and 10 m at all areas. Photosynthetic parameters and the daily metabolic carbon balance (CB) were determined. Kd was significantly higher in A3 compared with A1 and A2. The CB of P. decipiens was significantly higher in A1 followed by A2 and A3, and significantly higher at shallower than at greater depth. For H. grandifolius CB was significantly lower in A3 and in A2 at deeper depths compared with the rest of areas and depths. The lower distribution limit of the algae was positively correlated to the light penetration. An increase in the sediment run-off due to global warming might lead to an elevation of the lower depth distribution limit but retreating glaciers can open new space for macroalgal colonization. These changes will probably affect macroalgal primary productivity in Potter Cove with consequences for the coastal ecosystem.
Coverage:
Median Latitude: -62.229112 * Median Longitude: -58.676533 * South-bound Latitude: -62.237920 * West-bound Longitude: -58.712280 * North-bound Latitude: -62.224850 * East-bound Longitude: -58.643320
Date/Time Start: 2010-03-18T00:00:00 * Date/Time End: 2013-03-24T00:00:00
Size:
15 datasets

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Datasets listed in this publication series

  1. Deregibus, D; Quartino, ML; Campana, GL et al. (2016): Physical oceanography at CTD station Penion de Pesca in 2010. https://doi.org/10.1594/PANGAEA.869331
  2. Deregibus, D; Quartino, ML; Campana, GL et al. (2016): Physical oceanography at CTD station Penion de Pesca in 2011. https://doi.org/10.1594/PANGAEA.869332
  3. Deregibus, D; Quartino, ML; Campana, GL et al. (2016): Physical oceanography at CTD station Penion de Pesca in 2012. https://doi.org/10.1594/PANGAEA.869334
  4. Deregibus, D; Quartino, ML; Campana, GL et al. (2016): Physical oceanography at CTD station Penion de Pesca in 2013. https://doi.org/10.1594/PANGAEA.869335
  5. Deregibus, D; Quartino, ML; Campana, GL et al. (2016): Physical oceanography at CTD station PotterCove_A1. https://doi.org/10.1594/PANGAEA.869336
  6. Deregibus, D; Quartino, ML; Campana, GL et al. (2016): Physical oceanography at CTD station PotterCove_A2 in 2012. https://doi.org/10.1594/PANGAEA.869340
  7. Deregibus, D; Quartino, ML; Campana, GL et al. (2016): Physical oceanography at CTD station PotterCove_A2 in 2013. https://doi.org/10.1594/PANGAEA.869341
  8. Deregibus, D; Quartino, ML; Campana, GL et al. (2016): Physical oceanography at CTD station PotterCove_A3 in 2011. https://doi.org/10.1594/PANGAEA.869342
  9. Deregibus, D; Quartino, ML; Campana, GL et al. (2016): Physical oceanography at CTD station PotterCove_A3 in 2012. https://doi.org/10.1594/PANGAEA.869343
  10. Deregibus, D; Quartino, ML; Campana, GL et al. (2016): Physical oceanography at CTD station PotterCove_A3 in 2013. https://doi.org/10.1594/PANGAEA.869344
  11. Deregibus, D; Quartino, ML; Campana, GL et al. (2016): Physical oceanography at CTD station PotterCove_A4 in 2012. https://doi.org/10.1594/PANGAEA.869345
  12. Deregibus, D; Quartino, ML; Campana, GL et al. (2016): Physical oceanography at CTD station PotterCove_A5 in 2012. https://doi.org/10.1594/PANGAEA.869346
  13. Deregibus, D; Quartino, ML; Campana, GL et al. (2016): Physical oceanography at CTD station PotterCove_A5 in 2013. https://doi.org/10.1594/PANGAEA.869347
  14. Deregibus, D; Quartino, ML; Campana, GL et al. (2016): Physical oceanography at CTD station PotterCove_A6 in 2012. https://doi.org/10.1594/PANGAEA.869348
  15. Deregibus, D; Quartino, ML; Campana, GL et al. (2016): Physical oceanography at CTD station PotterCove_A6 in 2013. https://doi.org/10.1594/PANGAEA.869349