Pasotti, Francesca; De Troch, Marleen; Raes, Maarten; Vanreusel, Ann (2012): Results from a stable isotope tracer experiment in Potter Cove, King George Island, Antarctica [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.811380, Supplement to: Pasotti, F et al. (2012): Feeding ecology of shallow water meiofauna: insights from a stable isotope tracer experiment in Potter Cove, King George Island, Antarctica. Polar Biology, 35(11), 1629-1640, https://doi.org/10.1007/s00300-012-1203-6
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Abstract:
Antarctic meiofauna is still strongly understud- ied, and so is its trophic position in the food web. Primary producers, such as phytoplankton, and bacteria may repre- sent important food sources for shallow water metazoans, and the role of meiobenthos in the benthic-pelagic coupling represents an important brick for food web understanding. In a laboratory, feeding experiment 13C-labeled freeze- dried diatoms (Thalassiosira weissflogii) and bacteria were added to retrieved cores from Potter Cove (15-m depth, November 2007) in order to investigate the uptake of 3 main meiofauna taxa: nematodes, copepods and cumaceans. In the surface sediment layers, nematodes showed no real difference in uptake of both food sources. This outcome was supported by the natural delta 13C values and the community genus composition. In the first centimeter layer, the dominant genus was Daptonema which is known to be opportunistic, feeding on both bacteria and diatoms. Copepods and cumaceans on the other hand appeared to feed more on diatoms than on bacteria. This may point at a better adaptation to input of primary production from the water column. On the other hand, the overall carbon uptake of the given food sources was quite low for all taxa, indicating that likely other food sources might be of relevance for these meiobenthic organisms. Further studies are needed in order to better quantify the carbon requirements of these organisms.
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Latitude: -62.223000 * Longitude: -58.644000
Date/Time Start: 2007-11-15T00:00:00 * Date/Time End: 2007-11-15T00:00:00
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Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
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6 datasets
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Datasets listed in this publication series
- Pasotti, F; De Troch, M; Raes, M et al. (2012): Copepoda and Cumacea biomass in surface sediments of Potter Cove, King George Island, Antarctic Peninsula. https://doi.org/10.1594/PANGAEA.811375
- Pasotti, F; De Troch, M; Raes, M et al. (2012): (Fig. 2) Vertical density profiles of meiofauna taxa in surface sediments of Potter Cove, King George Island, Antarctic Peninsula. https://doi.org/10.1594/PANGAEA.811164
- Pasotti, F; De Troch, M; Raes, M et al. (2012): (Fig. 3) Vertical distribution of average nematode biomasses in surface sediments of Potter Cove, King George Island, Antarctic Peninsula. https://doi.org/10.1594/PANGAEA.811335
- Pasotti, F; De Troch, M; Raes, M et al. (2012): Total uptake of bacteria and diatoms by nematodes, copepods and cumaceans in surface sediments of Potter Cove, King George Island, Antarctic Peninsula, background samples. https://doi.org/10.1594/PANGAEA.811378
- Pasotti, F; De Troch, M; Raes, M et al. (2012): Total uptake, background samples. https://doi.org/10.1594/PANGAEA.811377
- Pasotti, F; De Troch, M; Raes, M et al. (2012): Total uptake of bacteria and diatoms by nematodes, copepods and cumaceans in surface sediments of Potter Cove, King George Island, Antarctic Peninsula, enriched samples. https://doi.org/10.1594/PANGAEA.811379