Trophic relationships and pelagicbenthic coupling during summer in the Barents Sea Marginal Ice Zone, revealed by stable carbon and nitrogen isotope measurements

Tamelander, Tobias; Renaud, Paul E.; Hop, Haakon; Carroll, Michael L.; Ambrose, William G.; Hobson, Keith A.

doi:10.3354/meps310033

Cited by 179 publications

(164 citation statements)

References 68 publications

(95 reference statements)

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“…Stable isotopes have been used in marine systems to estimate the inputs of terrestrial and marine organic carbon to the sediment (Naidu et al 1993;Goni et al 2000) and to trace the energy pathways from diVerent sources of primary production (including ice algae) through the pelagic food web (Hobson et al 1995;Tamelander et al 2006Tamelander et al , 2008. In the present study, stable isotopes, %N, and %C did not show substantial variations from January to May (Fig.…”

Section: Discussionmentioning

confidence: 59%

A multiple biomarker approach to tracking the fate of an ice algal bloom to the sea floor

2010

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Section: Discussionmentioning

confidence: 59%

A multiple biomarker approach to tracking the fate of an ice algal bloom to the sea floor

2010

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“…The significant differences between sites highlight the amount of spatial variability in parameters influencing the benthic activity such as vertical export, depth and other biotic as well as abiotic factors. Tamelander et al (2006) have demonstrated important spatial variability in pelagicbenthic coupling on the northwestern Barents Sea, ultimately influencing the benthic food web. The spatial pattern of benthic carbon remineralisation in our study is generally congruent with that in sediment pigment concentration, and highest values were observed in Franklin Bay, the shallowest site (FB), and lowest values at the deepest site in the central Amundsen Gulf (A-CC).…”

Section: Discussionmentioning

confidence: 99%

“…The southeastern Beaufort Sea is one of the most diverse Arctic shelf regions (Piepenburg et al 2010). Local community composition can be quite variable (Cusson et al 2007), which involves changes in trophic positions and, therefore, in carbon cycling efficiency (Tamelander et al 2006;Sun et al 2009). A better proxy than mere biomass would be achieved if functional Polar Biol (2011) 34:2025-20382033 123 composition of benthic communities were considered in the analysis (Bolam et al 2002;Michaud et al 2005), and hence, we coarsely separated biomass into infauna and foraminifera for analysis of driving factors.…”

Section: Discussionmentioning

confidence: 99%

Spring-to-summer changes and regional variability of benthic processes in the western Canadian Arctic

et al. 2011

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Seasonal dynamics in the activity of Arctic shelf benthos have been the subject of few local studies, and the pronounced among-site variability characterizing their results makes it difficult to upscale and generalize their conclusions. In a regional study encompassing five sites at 100-595 m water depth in the southeastern Beaufort Sea, we found that total pigment concentrations in surficial sediments, used as proxies of general food supply to the benthos, rose significantly after the transition from ice-covered conditions in spring (March-June 2008) to open-water conditions in summer (June-August 2008), whereas sediment Chl a concentrations, typical markers of fresh food input, did not. Macrobenthic biomass (including agglutinated foraminifera [500 lm) varied significantly among sites (1.2-6.4 g C m -2 in spring, 1.1-12.6 g C m -2 in summer), whereas a general spring-to-summer increase was not detected. Benthic carbon remineralisation also ranged significantly among sites (11.9-33.2 mg C m -2 day -1 in spring, 11.6-44.4 mg C m -2 day -1 in summer) and did in addition exhibit a general significant increase from spring-to-summer. Multiple regression analysis suggests that in both spring and summer, sediment Chl a concentration is the prime determinant of benthic carbon remineralisation, but other factors have a significant secondary influence, such as foraminiferan biomass (negative in both seasons), water depth (in spring) and infaunal biomass (in summer). Our findings indicate the importance of the combined and dynamic effects of food supply and benthic community patterns on the carbon remineralisation of the polar shelf benthos in seasonally ice-covered seas.

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“…Advected organic matter and nutrients contribute to in situ pelagic production and food-web interactions, which are linked with the Arctic benthos. Strong links between local sea-ice algae and phytoplankton and benthic processes occur, e.g., in the Barents Sea (Tamelander et al, 2006;Renaud et al, 2008;Morata and Renaud, 2008;Cochrane et al, 2009) and on the Greenland shelf (Ambrose and Hobson et al, 1995;Piepenburg et al, 1997), suggesting a relatively low importance of advected carbon for those benthic communities.…”

Section: Impacts Of Advection On Arctic Benthosmentioning

confidence: 99%

Advection in polar and sub-polar environments: Impacts on high latitude marine ecosystems

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Arrigo

et al. 2016

Progress in Oceanography

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a b s t r a c tWe compare and contrast the ecological impacts of atmospheric and oceanic circulation patterns on polar and sub-polar marine ecosystems. Circulation patterns differ strikingly between the north and south. Meridional circulation in the north provides connections between the sub-Arctic and Arctic despite the presence of encircling continental landmasses, whereas annular circulation patterns in the south tend to isolate Antarctic surface waters from those in the north. These differences influence fundamental aspects of the polar ecosystems from the amount, thickness and duration of sea ice, to the types of organisms, and the ecology of zooplankton, fish, seabirds and marine mammals. Meridional flows in both the North Pacific and the North Atlantic oceans transport heat, nutrients, and plankton northward into the Chukchi Sea, the Barents Sea, and the seas off the west coast of Greenland. In the North Atlantic, the advected heat warms the waters of the southern Barents Sea and, with advected nutrients and plankton, supports immense biomasses of fish, seabirds and marine mammals. On the Pacific side of the Arctic, cold waters flowing northward across the northern Bering and Chukchi seas during winter and spring limit the ability of boreal fish species to take advantage of high seasonal production there. Southward flow of cold Arctic waters into sub-Arctic regions of the North Atlantic occurs mainly through Fram Strait with less through the Barents Sea and the Canadian Archipelago. In the Pacific, the transport of Arctic waters and plankton southward through Bering Strait is minimal.In the Southern Ocean, the Antarctic Circumpolar Current and its associated fronts are barriers to the southward dispersal of plankton and pelagic fishes from sub-Antarctic waters, with the consequent evolution of Antarctic zooplankton and fish species largely occurring in isolation from those to the north. The Antarctic Circumpolar Current also disperses biota throughout the Southern Ocean, and as a result, the biota tends to be similar within a given broad latitudinal band. South of the Southern Boundary of the ACC, there is a large-scale divergence that brings nutrient-rich water to the surface. This divergence, along with more localized upwelling regions and deep vertical convection in winter, generates elevated nutrient levels throughout the Antarctic at the end of austral winter. However, such elevated nutrient levels do not support elevated phytoplankton productivity through the entire Southern Ocean, as iron concentrations are rapidly removed to limiting levels by spring blooms in deep waters. However, coastal http://dx

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Trophic relationships and pelagicbenthic coupling during summer in the Barents Sea Marginal Ice Zone, revealed by stable carbon and nitrogen isotope measurements

Cited by 179 publications

References 68 publications

A multiple biomarker approach to tracking the fate of an ice algal bloom to the sea floor

A multiple biomarker approach to tracking the fate of an ice algal bloom to the sea floor

Spring-to-summer changes and regional variability of benthic processes in the western Canadian Arctic

Advection in polar and sub-polar environments: Impacts on high latitude marine ecosystems

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Trophic relationships and pelagicbenthic coupling during summer in the Barents Sea Marginal Ice Zone, revealed by stable carbon and nitrogen isotope measurements

Cited by 179 publications

References 68 publications

A multiple biomarker approach to tracking the fate of an ice algal bloom to the sea floor

A multiple biomarker approach to tracking the fate of an ice algal bloom to the sea floor

Spring-to-summer changes and regional variability of benthic processes in the western Canadian Arctic

Advection in polar and sub-polar environments: Impacts on high latitude marine ecosystems

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Product

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Trophic relationships and pelagicbenthic coupling during summer in the Barents Sea Marginal Ice Zone, revealed by stable carbon and nitrogen isotope measurements