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  • 1
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    PANGAEA
    In:  Supplement to: McConnell, Brenna; Gradinger, Rolf; Iken, Katrin; Bluhm, Bodil Annikki (2012): Growth rates of arctic juvenile Scolelepis squamata (Polychaeta: Spionidae) isolated from Chukchi Sea fast ice. Polar Biology, 35(10), 1487-1494, https://doi.org/10.1007/s00300-012-1187-2
    Publication Date: 2023-12-13
    Description: In spring, Arctic coastal fast ice is inhabited by high densities of sea ice algae and, among other fauna, juveniles of benthic polychaetes. This paper investigates the hypothesis that growth rates of juveniles of the common sympagic polychaete, Scolelepis squamata (Polychaeta: Spionidae), are significantly faster at sea ice algal bloom concentrations compared to concurrent phytoplankton concentrations. Juvenile S. squamata from fast ice off Barrow, Alaska, were fed with different algal concentrations at 0 and 5 °C, simulating ambient high sea ice algal concentrations, concurrent low phytoplankton concentrations, and an intermediate concentration. Growth rates, calculated using a simple linear regression equation, were significantly higher (up to 115 times) at the highest algal concentration compared to the lowest. At the highest algal concentration, juveniles grew faster at 5 °C compared to those feeding at 0 °C with a Q10 of 2.0. We conclude that highly concentrated sea ice algae can sustain faster growth rates of polychaete juveniles compared to the less dense spring phytoplankton concentrations. The earlier melt of Arctic sea ice predicted with climate change might cause a mismatch between occurrence of polychaete juveniles and food availability in the near future. Our data indicate that this reduction in food availability might counteract any faster growth of a pelagic juvenile stage based on forecasted increased water temperatures.
    Keywords: Barrow_BASC; Barrow, Alaska, USA; Chlorophyll a, adjusted; Coefficient of determination; DATE/TIME; Duration, number of days; Experiment; Feeding experiment; FX; International Polar Year (2007-2008); IPY; Scolelepis squamata, growth rate; Significance; SNOW; Snow/ice sample; Temperature, technical
    Type: Dataset
    Format: text/tab-separated-values, 84 data points
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  • 2
    Publication Date: 2012-05-04
    Print ISSN: 0722-4060
    Electronic ISSN: 1432-2056
    Topics: Biology
    Published by Springer
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