Hop, Haakon; Mundy, Christopher John; Gosselin, Michel; Rossnagel, Andrea L; Barber, David G (2011): Chlorophyll a concentration and zooplankton abundance and biomass below melting sea ice in the Amundsen Gulf [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.811354, Supplement to: Hop, H et al. (2011): Zooplankton boom and ice amphipod bust below melting sea ice in the Amundsen Gulf, Arctic Canada. Polar Biology, 34(12), 1947-1958, https://doi.org/10.1007/s00300-011-0991-4
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Abstract:
Early summer in the Arctic with extensive ice melt and break-up represents a dramatic change for sympagic-pelagic fauna below seasonal sea ice. As part of the International Polar Year-Circumpolar Flaw Lead system study (IPY-CFL), this investigation quantified zooplankton in the meltwater layer below landfast ice and remaining ice fauna below melting ice during June (2008) in Franklin Bay and Darnley Bay, Amundsen Gulf, Canada. The ice was in a state of advanced melt, with fully developed melt ponds. Intense melting resulted in a 0.3- to 0.5-m-thick meltwater layer below the ice, with a strong halocline to the Arctic water below. Zooplankton under the ice, in and below the meltwater layer, was sampled by SCUBA divers. Dense concentrations (max. 1,400 ind./m**3) of Calanus glacialis were associated with the meltwater layer, with dominant copepodid stages CIV and CV and high abundance of nauplii. Less abundant species included Pseudocalanus spp., Oithona similis and C. hyperboreus. The copepods were likely feeding on phytoplankton (0.5-2.3 mg Chl-a/m**3) in the meltwater layer. Ice amphipods were present at low abundance (<10 ind./m**2) and wet biomass (<0.2 g/m**2). Onisimus glacialis and Apherusa glacialis made up 64 and 51% of the total ice faunal abundance in Darnley Bay and Franklin Bay, respectively. During early summer, the autochthonous ice fauna becomes gradually replaced by allochthonous zooplankton, with an abundance boom near the meltwater layer. The ice amphipod bust occurs during late stages of melting and break-up, when their sympagic habitat is diminished then lost.
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Coverage:
Median Latitude: 69.915000 * Median Longitude: -124.828500 * South-bound Latitude: 69.780000 * West-bound Longitude: -126.069000 * North-bound Latitude: 70.050000 * East-bound Longitude: -123.588000
Date/Time Start: 2008-06-08T00:00:00 * Date/Time End: 2008-06-21T00:00:00
Comment:
Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
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3 datasets
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Datasets listed in this publication series
- Hop, H; Mundy, CJ; Gosselin, M et al. (2011): (Table 1) Chlorophyll a concentrations in the upper part of the water column below the ice in the Amundsen Gulf. https://doi.org/10.1594/PANGAEA.811351
- Hop, H; Mundy, CJ; Gosselin, M et al. (2011): (Table 2) Relative abundance of zooplankton below landfast ice in the Amundsen Gulf. https://doi.org/10.1594/PANGAEA.811352
- Hop, H; Mundy, CJ; Gosselin, M et al. (2011): (Table 3) Relative abundance and wet biomass of ice fauna sampled below fast ice in the Amundsen Gulf. https://doi.org/10.1594/PANGAEA.811353