Phytoplankton biomass, production and potential export in the North Water

Klein, Bert; LeBlanc, Bernard; Mei, Zhi-Ping; Beret, Rachel; Jl, Michaud; Mundy, C. J.; Quillfeldt, Cecilie H. von; Garneau, Marie‐Ève; Roy, Sylvie; Gratton, Yves; Cochran, J. Kirk; Bélanger, Simon; Larouche, Pierre; Pakulski, J. Dean; Rivkin, Richard B.; Legendre, Louis

doi:10.1016/s0967-0645(02)00174-1

Cited by 115 publications

(76 citation statements)

References 39 publications

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“…On the other hand, benthic remineralization of ca. 40 mg C m −2 d −1 was not high, and close to global averages (Grant et al 2002;Klein et al 2002). Results from the ArcticNet 2008 mission, however, yielded higher benthic cycling (average 52-87 mg C m −2 d −1 ) ( Fig.…”

Section: Pelagic-benthic Coupling In the Eastern Canadian Arcticsupporting

confidence: 58%

Current state and trends in Canadian Arctic marine ecosystems: II. Heterotrophic food web, pelagic-benthic coupling, and biodiversity

et al. 2012

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As part of the Canadian contribution to the International Polar Year (IPY), several major international research programs have focused on offshore arctic marine ecosystems. The general goal of these projects was to improve our understanding of how the response of arctic marine ecosystems to climate warming will alter food web structure and ecosystem services provided to Northerners. At least four key findings from these projects relating to arctic heterotrophic food web, pelagic-benthic coupling and biodiversity have emerged: (1) Contrary to a long-standing paradigm of dormant ecosystems during the long arctic winter, major food web components showed relatively high level of winter activity, well before the spring release of ice algae and subsequent phytoplankton bloom. Such phenological plasticity among key secondary producers like zooplankton may thus narrow the risks of Climatic Change

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Section: Pelagic-benthic Coupling In the Eastern Canadian Arcticsupporting

confidence: 58%

Current state and trends in Canadian Arctic marine ecosystems: II. Heterotrophic food web, pelagic-benthic coupling, and biodiversity

et al. 2012

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“…and a rapid decrease in ice extent in early May, ca. one month earlier than usual (Forest et al 2011b) Klein et al 2002). In addition, suspended chl a biomass in the euphotic zone appeared to be higher during our study than in summer 2004 (mean 88 ± 79 versus 18.8 ± 8.9 mg chl a m -2 ; Brugel 2009) and large cells ([5 lm) dominated the chl a biomass during our study (mean 68% ± 22%; Table 3), except in the central Amundsen Gulf (Stn 1208) and at Stn CA05 (Table 3).…”

Section: Changes Observed In Summer 2008mentioning

confidence: 95%

Summertime primary production and carbon export in the southeastern Beaufort Sea during the low ice year of 2008

2011

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Following the extreme low ice year of 2007, primary production and the sinking export of particulate and gel-like organic material, using short-term particle interceptor traps deployed at 100 m, were measured in the southeastern Beaufort Sea during summer 2008. The combined influence of early ice retreat and coastal upwelling contributed to exceptionally high primary production (500 ± 312 mg C m -2 day -1 , n = 7), dominated by large cells ([5 lm, 73% ± 15%, n = 7). However, except for one station located north of Cape Bathurst, the sinking export of particulate organic carbon (POC) was relatively low (range: 38-104 mg C m -2 day -1 , n = 12) compared to other productive Arctic shelves. Estimates indicate that 80% ± 20% of the primary production was cycled through large copepods or the microbial food web. Exopolymeric substances were abundant in the sinking material but did not appear to accelerate POC sinking export. The use of isotopic signatures (d 13 C, d 15 N) and carbon/nitrogen ratios to identify sources of the sinking material was successful only at two stations with a strong marine or terrestrial signature, indicating the limitations of this approach in hydrographically and biologically complex Arctic coastal waters such as in the Beaufort Sea. At these two stations influenced by either coastal upwelling or erosion, the composition and magnitude of particulate sinking fluxes were markedly different from other stations visited during the study. These observations underscore the fundamental role of mesoscale circulation patterns and hydrodynamic singularities on the export of particulate organic material on Arctic shelves.

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“…Even though data on primary production in the Arctic Basin are accumulating (Kristiansen et al 1994, Cota et al 1996, Pomeroy 1997, especially since satellite images for chlorophyll have become available, data on the partitioning of production into different size fractions of biogeochemical significance, i.e. dissolved organic carbon (DOC) and particulate organic carbon (POC) of different sizes, started to become available only recently in the Arctic Basin (Gosselin et al 1997) and Arctic polynyas (Pesant et al 1996, Klein et al 2002. Phytoplankton of different sizes differ in their physiological responses to physical and chemical conditions of the water column, following the laws of allometry (Chisholm 1992, Finkel & Irwin 2000.…”

Section: Resale or Republication Not Permitted Without Written Consenmentioning

confidence: 99%

“…The North Water Polynya (NOW, north of Baffin Bay between Ellesmere Island and Greenland) is one of the most productive areas in the Arctic (Stirling 1980, Klein et al 2002, Tremblay et al 2002b). The timing of photosynthetic fixation of organic carbon relative to such physical processes as the opening and closing of the ice cover and water column mixing determines the role of Arctic polynyas as carbon sinks or sources.…”

Section: Resale or Republication Not Permitted Without Written Consenmentioning

confidence: 99%

“…The NOW is known as a major spawning and feeding ground for marine mammals and birds (Stirling 1997), which suggests a strong link between the high phytoplankton biomass (Lewis et al 1996, carbon production (Klein et al 2002), silica and new production (Tremblay et al 2002b) on the one hand, and the success of higher trophic levels on the other hand. Phytoplankton blooms produce large amounts of organic carbon, which is either exported to the pelagic food web or sinks out of the euphotic zone.…”

Section: Resale or Republication Not Permitted Without Written Consenmentioning

confidence: 99%

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Phytoplankton production in the North Water Polynya: size-fractions and carbon fluxes, April to July 1998

Mei¹,

Legendre²,

Gratton³

et al. 2003

Mar. Ecol. Prog. Ser.

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Phytoplankton biomass, production and potential export in the North Water

Cited by 115 publications

References 39 publications

Current state and trends in Canadian Arctic marine ecosystems: II. Heterotrophic food web, pelagic-benthic coupling, and biodiversity

Current state and trends in Canadian Arctic marine ecosystems: II. Heterotrophic food web, pelagic-benthic coupling, and biodiversity

Summertime primary production and carbon export in the southeastern Beaufort Sea during the low ice year of 2008

Phytoplankton production in the North Water Polynya: size-fractions and carbon fluxes, April to July 1998

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