Particle flux beneath fast ice in the shallow southwestern Beaufort Sea, Arctic Ocean

Carey, AG

doi:10.3354/meps040247

Cited by 48 publications

(17 citation statements)

References 29 publications

(47 reference statements)

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“…Rather, they sedimented quickly out of the euphotic zone and formed a transient food resource for pelagic grazers, when released from the melting ice. This is in accordance with studies, which suggest that ice algae tend to form aggregates with high sinking rates (Carey 1987, Riebesell et al 1991.…”

Section: Ice-water Interactions and The Winter-spring Transitionsupporting

confidence: 80%

Annual succession of marine pelagic protozoans in Disko Bay, West Greenland, with emphasis on winter dynamics

Levinsen¹,

Nielsen²,

Hansen³

2000

Mar. Ecol. Prog. Ser.

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The succession of pelagic ciliates and heterotrophic dinoflagellates was investigated in Disko Bay, West Greenland, from April 1996 to June 1997. In terms of biomass they contributed equally. Their annual distribution was bimodal with maxima in May/June and August. Summer levels were similar to those reported at lower latitudes. Winter dynamics were different. Due to 2 mo of polar darkness, food concentrations for ciliates and heterotrophic dinoflagellates were below threshold concentrations for growth. Nonetheless, small populations persisted throughout the winter. Both protozoan groups had a concentration of ~0.25 × 10 3 cells l -1. The succession patterns showed that all individual species peaked at different times during the summer months. However, diversity of the winter community was not different from that observed during summer. Even in the polar winter, the autotrophic ciliate Myrionecta rubra and the obligate mixotrophic ciliate Laboea strobila were recorded. Different strategies for winter survival of protozoans are discussed.

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Section: Ice-water Interactions and The Winter-spring Transitionsupporting

confidence: 80%

Annual succession of marine pelagic protozoans in Disko Bay, West Greenland, with emphasis on winter dynamics

Levinsen¹,

Nielsen²,

Hansen³

2000

Mar. Ecol. Prog. Ser.

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“…The constant sinking fluxes of BioSi, TPC, and POC with depth support that the loss of chl a was not due to advective processes, since these variables would presumably have been equally affected by advection. Several studies have shown that the heterotrophic food web may be capable of assimilating a considerable proportion of the ice algal biomass after its release from the ice (Carey 1987, Tremblay et al 1989, Michel et al 1996, Fortier et al 2002. These studies all show variability in the amount and composition of the sinking organic material in Arctic coastal areas, due to differences in the pelagic heterotrophic food web structure (e.g.…”

Section: Depth-related Changes In the Composition Of The Sinking Matementioning

confidence: 99%

“…Melnikov (1998) suggested that ice algae in the western Weddell Sea are released from the ice during winter through brine drainage during ice growth. Furthermore, Carey (1987) suggested that the carbon sinking flux measured near the bottom in the vicinity of Narwhal Island (southwestern Beaufort Sea) from mid-April to end of May primarily originated from the productive ice communities prior to ice melt. During the present study, ice thickness continuously increased until the onset of spring ice melt, indicating that any release of organic material from the ice during that period would be linked to brine drainage rather than melt processes.…”

Section: Seasonal Variations In Under-ice Sinking Fluxesmentioning

confidence: 99%

“…Several studies looking at temporal changes in under-ice sinking fluxes of organic material have shown increasing sinking fluxes in response to the release of material from the sea ice during spring melt (Carey 1987, Tremblay et al 1989, Michel et al 1996, Fortier et al 2002. Melnikov (1998) suggested that ice algae in the western Weddell Sea are released from the ice during winter through brine drainage during ice growth.…”

Section: Seasonal Variations In Under-ice Sinking Fluxesmentioning

confidence: 99%

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Seasonal changes in the sinking export of particulate material under first-year sea ice on the Mackenzie Shelf (western Canadian Arctic)

Juul-Pedersen¹,

Michel²,

Gosselin³

et al. 2008

Mar. Ecol. Prog. Ser.

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The sinking export of particulate material under landfast first-year sea ice was studied from the winter period to spring melt on the Mackenzie Shelf, western Canadian Arctic. Short-term particle interceptor traps were deployed at 1, 15, and 25 m under the ice on 16 consecutive occasions from 23 February to 20 June 2004. The sinking material was analyzed for chlorophyll (chl) a, phaeopigments, total particulate carbon (TPC), particulate organic carbon and nitrogen (POC and PON), and biogenic silica (BioSi). The sinking fluxes of chl a and BioSi increased steadily after 19 March and until the onset of spring melt (26 May), after which they increased considerably. The contribution of large algae (> 5 µm) to the total chl a sinking flux also increased after 19 March, reflecting an increasing contribution of diatoms to the sinking export of algal material. Accordingly, chl a sinking fluxes at 1 m showed a significant linear relationship with bottom ice chl a biomass. On average, 46% of the chl a exported at 1 m was lost in the upper 25 m. POC was the main component of the TPC sinking fluxes throughout the study. POC sinking fluxes remained fairly stable until the onset of spring melt, after which a considerable increase was observed. High POC:chl a ratios indicated a significant contribution of non-algal material to the sinking POC. The daily sinking loss rate of chl a, POC, and PON from the sea ice and interfacial layer (top 1 m of the water column) varied seasonally and was highest during the winter period. Our results illustrate the continuous downward sinking export of organic material under landfast ice, from winter throughout late spring.

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“…As mentioned above, much of the primary productivity in the northeastern Chukchi Sea probably remains ungrazed and fluxes to the bottom. However, only 1-10% of water-column production in the Beaufort Sea is estimated to reach the bottom (Carey and Ruff, 1977;Carey, 1987). Thus, carbon limitation has an important influence on benthic abundance and biomass in the Beaufort Sea.…”

mentioning

confidence: 99%

Mollusks in the Northeastern Chukchi Sea

Feder¹,

Foster²,

Jewett³

et al. 1994

ARCTIC

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ABSTRACT. Infaunal and epifaunal mollusks of the northeastern Chukchi Sea were sampled and 139 rnolluscan taxa were identified. The pattern of spatial distribution of molluscan species was determined by cluster analysis, which resulted in six infaunal and five epifaunal station groups. Species characterizing various faunal groups are defined. Stepwise multiple discriminant analysis was applied to correlate benthic biological associations with environmental variables. Delineation of infaunal groups was mainly due to percentage of Sand and bottom salinity, while epifaunal groups were separated by percent grave1 and bottom temperature. An increase in abundance and biomass of infaunal mollusks occurred adjacent to and north and northwest of an identified bottom front between the Bering Shelf and Resident Chukchi Water and Alaska Coastal Water. Epifaunal molluscan abundance and biomass were highest near the Coast. Mollusks, especially smaller species and the juvenile stages of larger species, represent a food resource for bottom-feeding predators in the study area.

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Particle flux beneath fast ice in the shallow southwestern Beaufort Sea, Arctic Ocean

Cited by 48 publications

References 29 publications

Annual succession of marine pelagic protozoans in Disko Bay, West Greenland, with emphasis on winter dynamics

Annual succession of marine pelagic protozoans in Disko Bay, West Greenland, with emphasis on winter dynamics

Seasonal changes in the sinking export of particulate material under first-year sea ice on the Mackenzie Shelf (western Canadian Arctic)

Mollusks in the Northeastern Chukchi Sea

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