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

Mei, Zhi-Ping; Legendre, Louis; Gratton, Yves; Tremblay, Jean‐Éric; LeBlanc, Bernard; Klein, Bert; Gosselin, Michel

doi:10.3354/meps256013

Cited by 43 publications

(28 citation statements)

References 64 publications

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“…The bulk sinking velocities of POC and chl a estimated for the NOW were relatively low, < 3 m d -1 (except at 150 m in June for chl a; Table 2). The latter values are higher than estimates from settling column experiments (0.1 to 0.7 m d -1 between April and July; Mei et al 2003). This discrepancy can be attributed to differences in the physiological conditions of the cells in settling column experiments compared to those collected in particle interceptor traps.…”

Section: Sinking Export Of Phytoplankton Biomass and Productioncontrasting

confidence: 50%

“…This export value is higher than the one based on phytoplankton size fractions between April and July (average of 20% of the phytoplankton production; Mei et al 2003). According to our results, Melosira arctica, a centric diatom that can grow suspended at the ice-water interface of pack ice, appears to be important in the ecosystem in June, but the sampling design did not allow for a quantitative assessment of its biomass and production.…”

Section: Sinking Export Of Phytoplankton Biomass and Productionmentioning

confidence: 40%

“…This discrepancy can be attributed to differences in the physiological conditions of the cells in settling column experiments compared to those collected in particle interceptor traps. The settling column experiments were performed on suspended chl a biomass collected at depths of 50 and 1% of the surface irradiance (Mei et al 2003), thus on cells which are likely to be in good physiological condition. Mei et al (2003) proposed that the abundant supply of nutrients and the 24 h of daylight might have caused the low sinking velocities observed during their study.…”

Section: Sinking Export Of Phytoplankton Biomass and Productionmentioning

confidence: 99%

“…The settling column experiments were performed on suspended chl a biomass collected at depths of 50 and 1% of the surface irradiance (Mei et al 2003), thus on cells which are likely to be in good physiological condition. Mei et al (2003) proposed that the abundant supply of nutrients and the 24 h of daylight might have caused the low sinking velocities observed during their study. In contrast, the particle interceptor traps are likely to collect phytoplankton cells which are in poor physiological condition and have higher sinking rates.…”

Section: Sinking Export Of Phytoplankton Biomass and Productionmentioning

confidence: 99%

“…In a recent study, Mei et al (2003) estimated that 81% of the particulate production of large phytoplankton (> 5 µm) from April to July was transferred to metazoans through the herbivorous food web while only 19% was exported to deep water by sinking. The particulate production of small phytoplankton (0.7 to 5 µm), which was only 19% of the total particulate production, was mostly channeled to the microbial food web, since little was lost to depth (Mei et al 2003). In addition, Hamel et al (2002) estimated that the burial flux of organic carbon in the southeastern part of the NOW region corresponds to 4-6% of the annual primary production in the euphotic zone.…”

Section: Introductionmentioning

confidence: 99%

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Seasonal contributions of phytoplankton and fecal pellets to the organic carbon sinking flux in the North Water (northern Baffin Bay)

Caron¹,

Michel²,

Gosselin³

2004

Mar. Ecol. Prog. Ser.

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Section: Sinking Export Of Phytoplankton Biomass and Productioncontrasting

confidence: 50%

Section: Sinking Export Of Phytoplankton Biomass and Productionmentioning

confidence: 40%

Section: Sinking Export Of Phytoplankton Biomass and Productionmentioning

confidence: 99%

Section: Sinking Export Of Phytoplankton Biomass and Productionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Seasonal contributions of phytoplankton and fecal pellets to the organic carbon sinking flux in the North Water (northern Baffin Bay)

Caron¹,

Michel²,

Gosselin³

2004

Mar. Ecol. Prog. Ser.

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Seasonal microbial processes in a high-latitude fjord (Kongsfjorden, Svalbard): I. Heterotrophic bacteria, picoplankton and nanoflagellates

2010

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Temporal dynamics of the microbial food web in the Barents Sea and adjacent water masses in the European Arctic are to a large extent unknown. Seasonal variation in stocks and production rates of heterotrophic bacteria and phototrophic and heterotrophic picoplankton and nano-Xagellates was investigated in the upper 50 m of the highlatitude Kongsfjorden, Svalbard, during six Weld campaigns between March and December 2006. Heterotrophic bacteria, picoplankton and nanoXagellates contributed to ecosystem structure and function in all seasons. Activity within the microbial food web peaked during spring bloom in April, parallel to low abundances of mesozooplankton. In the nutrient-limited post-bloom scenario, an eYcient microbial loop, fuelled by dissolved organic carbon from abundant mesozooplankton feeding on phytoplankton and protozooplankton, facilitated maximum integrated primary production rates. A tight microbial food web consisting of heterotrophic bacteria and phototrophic and heterotrophic picoplankton and nanoXagellates was found in the stratiWed water masses encountered in July and September. Microbial stocks and rates were low but persistent under winter conditions. Seasonal comparisons of microbial biomass and production revealed that structure and function of the microbial food web were fundamentally diVerent during the spring bloom when compared with other seasons. While the microbial food web was in a regenerative mode most of the time, during the spring bloom, a microbial transfer mode represented a trophic link for organic carbon in time and space. The microbial food web's ability to Wll diVerent functional roles in periods dominated by new and regenerated production may enhance the ecological Xexibility of pelagic ecosystems in the present era of climate change.

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Concentrations and sinking rates of transparent exopolymer particles (TEPs) in a coastal sea: the Changjiang River (Yangtze River) Estuary

Guo

Sun

2020

Acta Oceanol. Sin.

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Transparent exopolymer particles (TEPs) are ubiquitous throughout the oceans, and their sedimentation is considered an efficient biological carbon sink pathway. However, the role TEPs play as a carbon sink in eutrophic coastal seas is not well studied. In order to investigate this issue, two cruises in the spring and summer of 2011 were carried out in the Changjiang (Yangtze River) estuary, a typical eutrophic coastal sea. The concentrations, sinking rates, and export flux of TEPs were studied. TEP concentrations ranged from 40.00 to 1040.00 μg Xeq L -1 (mean = 209.70 ± 240.93 μg Xeq L -1 ) in spring and from 56.67 to 1423.33 μg Xeq L -1 (mean = 433.33 ± 393.02 μg Xeq L -1 ) in summer. A significant positive correlation between TEP concentrations and chlorophyll (Chl) a concentrations was observed. TEP sinking rates ranged from 0.08 to 0.57 m d -1 (mean = 0.28 ± 0.14 m d -1 ) in spring and from 0.10 to 1.08 m d -1 (mean = 0.34 ± 0.31 m d -1 ) in summer. TEP sinking rates were always higher in the upper layers than in the deeper layers during both seasons. The export flux of TEPs was also calculated, and it ranged from 4.95 to 29.40 mg C m -2 d -1 in spring (mean = 14.66 ± 8.83 mg C m -2 d -1 ) and from 6.80 to 30.45 mg C m -2 d -1 (mean = 15.71 ± 8.73 mg C m -2 d -1 ) in summer. This study is the first study on TEP sinking in the Changjiang (Yangtze River) Estuary, and it confirmed that TEP plays a significant role as a carbon sink in the eutrophic coastal sea. IntroductionTransparent exopolymer particles (TEPs) are transparent gel-like particles in the ocean[1] that were first identified and named by Alldredge et al in 1993 [2]. They are formed from polysaccharides that are mainly exuded by phytoplankton cells and bacteria [3][4][5]. TEPs were .

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

Cited by 43 publications

References 64 publications

Seasonal contributions of phytoplankton and fecal pellets to the organic carbon sinking flux in the North Water (northern Baffin Bay)

Seasonal contributions of phytoplankton and fecal pellets to the organic carbon sinking flux in the North Water (northern Baffin Bay)

Seasonal microbial processes in a high-latitude fjord (Kongsfjorden, Svalbard): I. Heterotrophic bacteria, picoplankton and nanoflagellates

Concentrations and sinking rates of transparent exopolymer particles (TEPs) in a coastal sea: the Changjiang River (Yangtze River) Estuary

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