Nguyen, Dan; Maranger, Roxane (2011): Physical characteristics and bacterial production and respiration at stations sampled during 2008 in the eastern Beaufort Sea [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.817937, Supplement to: Nguyen, D; Maranger, R (2011): Respiration and bacterial carbon dynamics in Arctic sea ice. Polar Biology, 34(12), 1843-1855, https://doi.org/10.1007/s00300-011-1040-z
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Abstract:
Bacterial carbon demand, an important component of ecosystem dynamics in polar waters and sea ice, is a function of both bacterial production (BP) and respiration (BR). BP has been found to be generally higher in sea ice than underlying waters, but rates of BR and bacterial growth efficiency (BGE) are poorly characterized in sea ice. Using melted ice core incubations, community respiration (CR), BP, and bacterial abundance (BA) were studied in sea ice and at the ice-water interface (IWI) in the Western Canadian Arctic during the spring and summer 2008. CR was converted to BR empirically. BP increased over the season and was on average 22 times higher in sea ice as compared with the IWI. Rates in ice samples were highly variable ranging from 0.2 to 18.3 µg C/l/d. BR was also higher in ice and on average ~10 times higher than BP but was less variable ranging from 2.39 to 22.5 µg C/l/d. Given the high variability in BP and the relatively more stable rates of BR, BP was the main driver of estimated BGE (r**2 = 0.97, P < 0.0001). We conclude that microbial respiration can consume a significant proportion of primary production in sea ice and may play an important role in biogenic CO2 fluxes between the sea ice and atmosphere.
Project(s):
Coverage:
Median Latitude: 71.641830 * Median Longitude: -124.459374 * South-bound Latitude: 69.826700 * West-bound Longitude: -126.172000 * North-bound Latitude: 75.128000 * East-bound Longitude: -120.396600
Date/Time Start: 2008-03-01T00:00:00 * Date/Time End: 2008-07-07T00:00:00
Comment:
Part of the IPY Circumpolar Flaw Lead (CFL) Study. 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)
Size:
2 datasets
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Datasets listed in this publication series
- Nguyen, D; Maranger, R (2011): (Table 2) Bacterial abundance, carbon production and respiration in samples obtained during a CCGS Amundsen cruise in 2008. https://doi.org/10.1594/PANGAEA.817936
- Nguyen, D; Maranger, R (2011): (Table 1) Physical characteristics at stations sampled during a CCGS Amundsen cruise in 2008, eastern Beaufort Sea. https://doi.org/10.1594/PANGAEA.817935