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Hoffmann, Ralf; Al-Handal, Adil Yousif; Wulff, Angela; Hasemann, Christiane; Braeckman, Ulrike; Deregibus, Dolores; Quartino, Maria Liliana; Zacher, Katharina; Holtappels, Moritz; Wenzhöfer, Frank (2018): Total oxygen fluxes, and diatom density, diatom biomass and diversity of the diatom community in spring 2016 and environmental photosynthetically active radiation from 2015 and 2016 from three stations in Potter Cove, Antarctica. PANGAEA, https://doi.org/10.1594/PANGAEA.893276, Supplement to: Hoffmann, Ralf; Al-Handal, Adil Yousif; Wulff, Angela; Deregibus, Dolores; Zacher, Katharina; Quartino, Maria Liliana; Wenzhöfer, Frank; Braeckman, Ulrike (2019): Implications of Glacial Melt-Related Processes on the Potential Primary Production of a Microphytobenthic Community in Potter Cove (Antarctica). Frontiers in Marine Science, 6, https://doi.org/10.3389/fmars.2019.00655

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Abstract:
The Antarctic Peninsula experiences a fast retreat of glaciers, which correlates with an increased release of particles and related increased sedimentation and thus, a decrease in the available light for benthic primary production. We investigated how changes in the general sedimentation and shading patterns affect the primary production by benthic microalgae, the microphytobenthos. In order to determine potential net primary production and respiration of the microphytobenthic community, sediment cores from locations exposed to different sedimentation rates and shading were exposed to photosynthetic active radiation (PAR, 400–700 nm) of 0–70 µmol photons m-2 s-1. Total oxygen fluxes and microphytobenthic diatom community structure, density, and biomass were determined. Our study revealed that the net primary production of the microphytobenthos decreased with increasing sedimentation and shading, while the microphytobenthic diatom density and composition remained similar. By comparing our experimental results with in situ measured PAR intensities, we furthermore assessed the microphytobenthic primary production as an important carbon source within Potter Cove's benthic ecosystem. We propose that the microphytobenthic contribution to the total primary production may drop drastically due to Antarctic glacial retreat and correlated sedimentation and shading, with yet unknown consequences for the benthic heterotrophic community, its structure, and diversity.
Coverage:
Median Latitude: -62.228873 * Median Longitude: -58.654336 * South-bound Latitude: -62.235580 * West-bound Longitude: -58.662060 * North-bound Latitude: -62.225110 * East-bound Longitude: -58.641750
Date/Time Start: 2015-01-01T00:30:00 * Date/Time End: 2016-12-11T00:00:00
Size:
7 datasets

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Datasets listed in this publication series

  1. Al-Handal, AY; Wulff, A; Hasemann, C et al. (2018): Density, biomass and diversity of the diatom community at Faro, Creek and Isla D in Potter Cove (King George Island) in November and December 2016. https://doi.org/10.1594/PANGAEA.893272
  2. Deregibus, D; Quartino, ML; Hoffmann, R et al. (2018): Environmental photosynthetically active radiation (PAR) at Faro (Potter Cove, King Geroge Island, Western Antarctic Peninsula) in 2015. https://doi.org/10.1594/PANGAEA.893273
  3. Deregibus, D; Quartino, ML; Hoffmann, R et al. (2018): Environmental photosynthetically active radiation (PAR) at Isla D (Potter Cove, King Geroge Island, Western Antarctic Peninsula) in 2015. https://doi.org/10.1594/PANGAEA.893274
  4. Hoffmann, R; Braeckman, U; Wenzhöfer, F (2018): Total oxygen fluxes of four sediment cores from Creek (Potter Cove, Antarctica) exposed to increasing light intensities measured in December 2016. https://doi.org/10.1594/PANGAEA.893269
  5. Hoffmann, R; Braeckman, U; Wenzhöfer, F (2018): Total oxygen fluxes of four sediment cores from Faro (Potter Cove, Antarctica) exposed to increasing light intensities measured in November 2016. https://doi.org/10.1594/PANGAEA.893270
  6. Hoffmann, R; Braeckman, U; Wenzhöfer, F (2018): Total oxygen fluxes of four sediment cores from Isla D (Potter Cove, Antarctica) exposed to increasing light intensities measured in December 2016. https://doi.org/10.1594/PANGAEA.893271
  7. Holtappels, M; Hoffmann, R (2018): Environmental photosynthetically active radiation (PAR) at Creek (Potter Cove, King Geroge Island, Western Antarctic Peninsula) in 2016. https://doi.org/10.1594/PANGAEA.893275