McConnell, Brenna; Gradinger, Rolf; Iken, Katrin; Bluhm, Bodil Annikki (2012): (Table 3) Growth rates of the juvenile polychaete Scolelepis squamata obtained from ice cores under varying conditions [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.816073, Supplement to: McConnell, B et al. (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
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Abstract:
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.
Project(s):
Coverage:
Median Latitude: 71.345575 * Median Longitude: -156.611365 * South-bound Latitude: 71.328320 * West-bound Longitude: -156.694400 * North-bound Latitude: 71.362830 * East-bound Longitude: -156.528330
Date/Time Start: 2007-04-27T00:00:00 * Date/Time End: 2008-06-02T00:00:00
Minimum Elevation: -7.0 m * Maximum Elevation: -7.0 m
Event(s):
Comment:
Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DATE/TIME | Date/Time | Geocode | |||
| 2 | Chlorophyll a, adjusted | aChl a | µg/l | McConnell, Brenna | Feeding experiment (FX) | #7.5 = 5-10 |
| 3 | Experiment | Exp | McConnell, Brenna | Feeding experiment (FX) | ||
| 4 | Temperature, technical | T tech | °C | McConnell, Brenna | Feeding experiment (FX) | |
| 5 | Duration, number of days | Duration | days | McConnell, Brenna | Feeding experiment (FX) | |
| 6 | Scolelepis squamata, growth rate | S. squamata µ | µm/day | McConnell, Brenna | Feeding experiment (FX) | |
| 7 | Coefficient of determination | R**2 | McConnell, Brenna | Feeding experiment (FX) | ||
| 8 | Significance | Signif | McConnell, Brenna | Feeding experiment (FX) |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
84 data points