Kirchman, David L; Hill, Victoria; Cottrell, Matthew T; Gradinger, Rolf; Malmstrom, Rex R; Parker, Alexander E (2009): Average nutrient concentration, and growth characteristics of bacteria during USCGC Healy cruises in 2002 and 2004 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.811997, Supplement to: Kirchman, DL et al. (2009): Standing stocks, production, and respiration of phytoplankton and heterotrophic bacteria in the western Arctic Ocean. Deep Sea Research Part II: Topical Studies in Oceanography, 56(17), 1237-1248, https://doi.org/10.1016/j.dsr2.2008.10.018
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Abstract:
Standing stocks and production rates for phytoplankton and heterotrophic bacteria were examined during four expeditions in the western Arctic Ocean (Chukchi Sea and Canada Basin) in the spring and summer of 2002 and 2004. Rates of primary production (PP) and bacterial production (BP) were higher in the summer than in spring and in shelf waters than in the basin. Most surprisingly, PP was 3-fold higher in 2004 than in 2002; ice-corrected rates were 1581 and 458 mg C/m**2/d respectively, for the entire region. The difference between years was mainly due to low ice coverage in the summer of 2004. The spatial and temporal variation in PP led to comparable variation in BP. Although temperature explained as much variability in BP as did PP or phytoplankton biomass, there was no relationship between temperature and bacterial growth rates above about 0°C. The average ratio of BP to PP was 0.06 and 0.79 when ice-corrected PP rates were greater than and less than 100 mg C/m**2/d, respectively; the overall average was 0.34. Bacteria accounted for a highly variable fraction of total respiration, from 3% to over 60% with a mean of 25%. Likewise, the fraction of PP consumed by bacterial respiration, when calculated from growth efficiency (average of 6.9%) and BP estimates, varied greatly over time and space (7% to >500%). The apparent uncoupling between respiration and PP has several implications for carbon export and storage in the western Arctic Ocean.
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Median Latitude: 71.805727 * Median Longitude: -158.059471 * South-bound Latitude: 69.956000 * West-bound Longitude: -164.390000 * North-bound Latitude: 73.480000 * East-bound Longitude: -151.844000
Date/Time Start: 2002-05-05T00:00:00 * Date/Time End: 2004-08-19T14:37:00
Comment:
Part of the Western Artic Shelf-Basin Interactions (SBI). Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150
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Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
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Datasets listed in this publication series
- Kirchman, DL; Hill, V; Cottrell, MT et al. (2009): (Table 1) Selected properties of bacteria obtained during USCGC Healy cruises in 2002 and 2004, western Arctic Ocean. https://doi.org/10.1594/PANGAEA.811993
- Kirchman, DL; Hill, V; Cottrell, MT et al. (2009): (Table 2) Nutrient concentration of the euphotic zone during USCGC Healy cruises in 2002 and 2004, western Arctic Ocean. https://doi.org/10.1594/PANGAEA.811994
- Kirchman, DL; Hill, V; Cottrell, MT et al. (2009): (Table 4) Bacterial growth efficiency in samples obtained during USCGC Healy cruise HLY-04-03, western Arctic Ocean. https://doi.org/10.1594/PANGAEA.811996
- Kirchman, DL; Hill, V; Cottrell, MT et al. (2009): (Table 3) Community and bacterial respiration in samples obtained during USCGC Healy cruise HLY-04-03, western Arctic Ocean. https://doi.org/10.1594/PANGAEA.811995